#![deny(clippy::all)]
#![allow(
    non_camel_case_types,
    non_snake_case,
    non_upper_case_globals,
    non_upper_case_globals,
    non_camel_case_types,
    clippy::missing_safety_doc,
    clippy::expect_fun_call
)]

#[macro_use]
extern crate human_panic;
extern crate num_traits;
extern crate serde_json;

use std::collections::BTreeMap;
use std::convert::TryInto;
use std::fmt::Write;
use std::ptr;
use std::str::FromStr;
use std::time::{Duration, SystemTime};

use async_std::task::{block_on, spawn};
use num_traits::{FromPrimitive, ToPrimitive};

use deltachat::accounts::Accounts;
use deltachat::chat::{ChatId, ChatVisibility, MuteDuration, ProtectionStatus};
use deltachat::constants::DC_MSG_ID_LAST_SPECIAL;
use deltachat::contact::{Contact, Origin};
use deltachat::context::Context;
use deltachat::ephemeral::Timer as EphemeralTimer;
use deltachat::key::DcKey;
use deltachat::message::MsgId;
use deltachat::stock::StockMessage;
use deltachat::*;

mod dc_array;

mod string;
use self::string::*;
use deltachat::chatlist::Chatlist;

// as C lacks a good and portable error handling,
// in general, the C Interface is forgiving wrt to bad parameters.
// - objects returned by some functions
//   should be passable to the functions handling that object.
// - if in doubt, the empty string is returned on failures;
//   this avoids panics if the ui just forgets to handle a case
// - finally, this behaviour matches the old core-c API and UIs already depend on it

// TODO: constants

// dc_context_t

/// Struct representing the deltachat context.
pub type dc_context_t = Context;

#[no_mangle]
pub unsafe extern "C" fn dc_context_new(
    os_name: *const libc::c_char,
    dbfile: *const libc::c_char,
    blobdir: *const libc::c_char,
) -> *mut dc_context_t {
    setup_panic!();

    if dbfile.is_null() {
        eprintln!("ignoring careless call to dc_context_new()");
        return ptr::null_mut();
    }

    let os_name = if os_name.is_null() {
        String::from("DcFFI")
    } else {
        to_string_lossy(os_name)
    };

    let ctx = if blobdir.is_null() || *blobdir == 0 {
        use rand::Rng;
        // generate random ID as this functionality is not yet available on the C-api.
        let id = rand::thread_rng().gen();
        block_on(Context::new(
            os_name,
            as_path(dbfile).to_path_buf().into(),
            id,
        ))
    } else {
        eprintln!("blobdir can not be defined explicitly anymore");
        return ptr::null_mut();
    };
    match ctx {
        Ok(ctx) => Box::into_raw(Box::new(ctx)),
        Err(err) => {
            eprintln!("failed to create context: {}", err);
            ptr::null_mut()
        }
    }
}

/// Release the context structure.
///
/// This function releases the memory of the `dc_context_t` structure.
#[no_mangle]
pub unsafe extern "C" fn dc_context_unref(context: *mut dc_context_t) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_context_unref()");
        return;
    }
    Box::from_raw(context);
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_blobdir(context: *mut dc_context_t) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_blobdir()");
        return "".strdup();
    }
    let ctx = &*context;
    ctx.get_blobdir().to_string_lossy().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_config(
    context: *mut dc_context_t,
    key: *const libc::c_char,
    value: *const libc::c_char,
) -> libc::c_int {
    if context.is_null() || key.is_null() {
        eprintln!("ignoring careless call to dc_set_config()");
        return 0;
    }
    let ctx = &*context;
    match config::Config::from_str(&to_string_lossy(key)) {
        // When ctx.set_config() fails it already logged the error.
        // TODO: Context::set_config() should not log this
        Ok(key) => block_on(async move {
            ctx.set_config(key, to_opt_string_lossy(value).as_deref())
                .await
                .is_ok() as libc::c_int
        }),
        Err(_) => {
            warn!(ctx, "dc_set_config(): invalid key");
            0
        }
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_config(
    context: *mut dc_context_t,
    key: *const libc::c_char,
) -> *mut libc::c_char {
    if context.is_null() || key.is_null() {
        eprintln!("ignoring careless call to dc_get_config()");
        return "".strdup();
    }
    let ctx = &*context;
    match config::Config::from_str(&to_string_lossy(key)) {
        Ok(key) => block_on(async move { ctx.get_config(key).await.unwrap_or_default().strdup() }),
        Err(_) => {
            warn!(ctx, "dc_get_config(): invalid key");
            "".strdup()
        }
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_stock_translation(
    context: *mut dc_context_t,
    stock_id: u32,
    stock_msg: *mut libc::c_char,
) -> libc::c_int {
    if context.is_null() || stock_msg.is_null() {
        eprintln!("ignoring careless call to dc_set_stock_string");
        return 0;
    }
    let msg = to_string_lossy(stock_msg);
    let ctx = &*context;

    block_on(async move {
        match StockMessage::from_u32(stock_id) {
            Some(id) => match ctx.set_stock_translation(id, msg).await {
                Ok(()) => 1,
                Err(err) => {
                    warn!(ctx, "set_stock_translation failed: {}", err);
                    0
                }
            },
            None => {
                warn!(ctx, "invalid stock message id {}", stock_id);
                0
            }
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_config_from_qr(
    context: *mut dc_context_t,
    qr: *mut libc::c_char,
) -> libc::c_int {
    if context.is_null() || qr.is_null() {
        eprintln!("ignoring careless call to dc_set_config_from_qr");
        return 0;
    }
    let qr = to_string_lossy(qr);
    let ctx = &*context;

    block_on(async move {
        match qr::set_config_from_qr(&ctx, &qr).await {
            Ok(()) => 1,
            Err(err) => {
                error!(ctx, "Failed to create account from QR code: {}", err);
                0
            }
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_info(context: *const dc_context_t) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_info()");
        return "".strdup();
    }
    let ctx = &*context;
    block_on(async move {
        let info = ctx.get_info().await;
        render_info(info).unwrap_or_default().strdup()
    })
}

fn render_info(
    info: BTreeMap<&'static str, String>,
) -> std::result::Result<String, std::fmt::Error> {
    let mut res = String::new();
    for (key, value) in &info {
        writeln!(&mut res, "{}={}", key, value)?;
    }

    Ok(res)
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_oauth2_url(
    context: *mut dc_context_t,
    addr: *const libc::c_char,
    redirect: *const libc::c_char,
) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_oauth2_url()");
        return ptr::null_mut(); // NULL explicitly defined as "unknown"
    }
    let ctx = &*context;
    let addr = to_string_lossy(addr);
    let redirect = to_string_lossy(redirect);

    block_on(async move {
        match oauth2::dc_get_oauth2_url(&ctx, addr, redirect).await {
            Some(res) => res.strdup(),
            None => ptr::null_mut(),
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_configure(context: *mut dc_context_t) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_configure()");
        return;
    }

    let ctx = &*context;

    spawn(async move { ctx.configure().await.log_err(ctx, "Configure failed") });
}

#[no_mangle]
pub unsafe extern "C" fn dc_is_configured(context: *mut dc_context_t) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_is_configured()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move { ctx.is_configured().await as libc::c_int })
}

#[no_mangle]
pub unsafe extern "C" fn dc_start_io(context: *mut dc_context_t) {
    if context.is_null() {
        return;
    }
    let ctx = &*context;

    block_on(ctx.start_io())
}

#[no_mangle]
pub unsafe extern "C" fn dc_is_io_running(context: *mut dc_context_t) -> libc::c_int {
    if context.is_null() {
        return 0;
    }
    let ctx = &*context;

    block_on(ctx.is_io_running()) as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_id(context: *mut dc_context_t) -> libc::c_int {
    if context.is_null() {
        return 0;
    }
    let ctx = &*context;

    ctx.get_id() as libc::c_int
}

pub type dc_event_t = Event;

#[no_mangle]
pub unsafe extern "C" fn dc_event_unref(a: *mut dc_event_t) {
    if a.is_null() {
        eprintln!("ignoring careless call to dc_event_unref()");
        return;
    }

    Box::from_raw(a);
}

#[no_mangle]
pub unsafe extern "C" fn dc_event_get_id(event: *mut dc_event_t) -> libc::c_int {
    if event.is_null() {
        eprintln!("ignoring careless call to dc_event_get_id()");
        return 0;
    }

    let event = &*event;
    event.as_id()
}

#[no_mangle]
pub unsafe extern "C" fn dc_event_get_data1_int(event: *mut dc_event_t) -> libc::c_int {
    if event.is_null() {
        eprintln!("ignoring careless call to dc_event_get_data1_int()");
        return 0;
    }

    let event = &(*event).typ;
    match event {
        EventType::Info(_)
        | EventType::SmtpConnected(_)
        | EventType::ImapConnected(_)
        | EventType::SmtpMessageSent(_)
        | EventType::ImapMessageDeleted(_)
        | EventType::ImapMessageMoved(_)
        | EventType::NewBlobFile(_)
        | EventType::DeletedBlobFile(_)
        | EventType::Warning(_)
        | EventType::Error(_)
        | EventType::ErrorNetwork(_)
        | EventType::ErrorSelfNotInGroup(_) => 0,
        EventType::MsgsChanged { chat_id, .. }
        | EventType::IncomingMsg { chat_id, .. }
        | EventType::MsgsNoticed(chat_id)
        | EventType::MsgDelivered { chat_id, .. }
        | EventType::MsgFailed { chat_id, .. }
        | EventType::MsgRead { chat_id, .. }
        | EventType::ChatModified(chat_id)
        | EventType::ChatEphemeralTimerModified { chat_id, .. } => chat_id.to_u32() as libc::c_int,
        EventType::ContactsChanged(id) | EventType::LocationChanged(id) => {
            let id = id.unwrap_or_default();
            id as libc::c_int
        }
        EventType::ConfigureProgress { progress, .. } | EventType::ImexProgress(progress) => {
            *progress as libc::c_int
        }
        EventType::ImexFileWritten(_) => 0,
        EventType::SecurejoinInviterProgress { contact_id, .. }
        | EventType::SecurejoinJoinerProgress { contact_id, .. } => *contact_id as libc::c_int,
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_event_get_data2_int(event: *mut dc_event_t) -> libc::c_int {
    if event.is_null() {
        eprintln!("ignoring careless call to dc_event_get_data2_int()");
        return 0;
    }

    let event = &(*event).typ;

    match event {
        EventType::Info(_)
        | EventType::SmtpConnected(_)
        | EventType::ImapConnected(_)
        | EventType::SmtpMessageSent(_)
        | EventType::ImapMessageDeleted(_)
        | EventType::ImapMessageMoved(_)
        | EventType::NewBlobFile(_)
        | EventType::DeletedBlobFile(_)
        | EventType::Warning(_)
        | EventType::Error(_)
        | EventType::ErrorNetwork(_)
        | EventType::ErrorSelfNotInGroup(_)
        | EventType::ContactsChanged(_)
        | EventType::LocationChanged(_)
        | EventType::ConfigureProgress { .. }
        | EventType::ImexProgress(_)
        | EventType::ImexFileWritten(_)
        | EventType::MsgsNoticed(_)
        | EventType::ChatModified(_) => 0,
        EventType::MsgsChanged { msg_id, .. }
        | EventType::IncomingMsg { msg_id, .. }
        | EventType::MsgDelivered { msg_id, .. }
        | EventType::MsgFailed { msg_id, .. }
        | EventType::MsgRead { msg_id, .. } => msg_id.to_u32() as libc::c_int,
        EventType::SecurejoinInviterProgress { progress, .. }
        | EventType::SecurejoinJoinerProgress { progress, .. } => *progress as libc::c_int,
        EventType::ChatEphemeralTimerModified { timer, .. } => timer.to_u32() as libc::c_int,
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_event_get_data2_str(event: *mut dc_event_t) -> *mut libc::c_char {
    if event.is_null() {
        eprintln!("ignoring careless call to dc_event_get_data2_str()");
        return ptr::null_mut();
    }

    let event = &(*event).typ;

    match event {
        EventType::Info(msg)
        | EventType::SmtpConnected(msg)
        | EventType::ImapConnected(msg)
        | EventType::SmtpMessageSent(msg)
        | EventType::ImapMessageDeleted(msg)
        | EventType::ImapMessageMoved(msg)
        | EventType::NewBlobFile(msg)
        | EventType::DeletedBlobFile(msg)
        | EventType::Warning(msg)
        | EventType::Error(msg)
        | EventType::ErrorNetwork(msg)
        | EventType::ErrorSelfNotInGroup(msg) => {
            let data2 = msg.to_c_string().unwrap_or_default();
            data2.into_raw()
        }
        EventType::MsgsChanged { .. }
        | EventType::IncomingMsg { .. }
        | EventType::MsgsNoticed(_)
        | EventType::MsgDelivered { .. }
        | EventType::MsgFailed { .. }
        | EventType::MsgRead { .. }
        | EventType::ChatModified(_)
        | EventType::ContactsChanged(_)
        | EventType::LocationChanged(_)
        | EventType::ImexProgress(_)
        | EventType::SecurejoinInviterProgress { .. }
        | EventType::SecurejoinJoinerProgress { .. }
        | EventType::ChatEphemeralTimerModified { .. } => ptr::null_mut(),
        EventType::ConfigureProgress { comment, .. } => {
            if let Some(comment) = comment {
                comment.to_c_string().unwrap_or_default().into_raw()
            } else {
                ptr::null_mut()
            }
        }
        EventType::ImexFileWritten(file) => {
            let data2 = file.to_c_string().unwrap_or_default();
            data2.into_raw()
        }
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_event_get_account_id(event: *mut dc_event_t) -> u32 {
    if event.is_null() {
        eprintln!("ignoring careless call to dc_event_get_account_id()");
        return 0;
    }

    (*event).id
}

pub type dc_event_emitter_t = EventEmitter;

#[no_mangle]
pub unsafe extern "C" fn dc_get_event_emitter(
    context: *mut dc_context_t,
) -> *mut dc_event_emitter_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_event_emitter()");
        return ptr::null_mut();
    }
    let ctx = &*context;
    Box::into_raw(Box::new(ctx.get_event_emitter()))
}

#[no_mangle]
pub unsafe extern "C" fn dc_event_emitter_unref(emitter: *mut dc_event_emitter_t) {
    if emitter.is_null() {
        eprintln!("ignoring careless call to dc_event_emitter_unref()");
        return;
    }

    Box::from_raw(emitter);
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_next_event(events: *mut dc_event_emitter_t) -> *mut dc_event_t {
    if events.is_null() {
        eprintln!("ignoring careless call to dc_get_next_event()");
        return ptr::null_mut();
    }
    let events = &*events;

    events
        .recv_sync()
        .map(|ev| Box::into_raw(Box::new(ev)))
        .unwrap_or_else(ptr::null_mut)
}

#[no_mangle]
pub unsafe extern "C" fn dc_stop_io(context: *mut dc_context_t) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_shutdown()");
        return;
    }
    let ctx = &*context;

    block_on(async move {
        ctx.stop_io().await;
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_maybe_network(context: *mut dc_context_t) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_maybe_network()");
        return;
    }
    let ctx = &*context;

    block_on(async move { ctx.maybe_network().await })
}

#[no_mangle]
pub unsafe extern "C" fn dc_preconfigure_keypair(
    context: *mut dc_context_t,
    addr: *const libc::c_char,
    public_data: *const libc::c_char,
    secret_data: *const libc::c_char,
) -> i32 {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_preconfigure_keypair()");
        return 0;
    }
    let ctx = &*context;
    block_on(async move {
        let addr = dc_tools::EmailAddress::new(&to_string_lossy(addr))?;
        let public = key::SignedPublicKey::from_base64(&to_string_lossy(public_data))?;
        let secret = key::SignedSecretKey::from_base64(&to_string_lossy(secret_data))?;
        let keypair = key::KeyPair {
            addr,
            public,
            secret,
        };
        key::store_self_keypair(&ctx, &keypair, key::KeyPairUse::Default).await?;
        Ok::<_, anyhow::Error>(1)
    })
    .log_err(ctx, "Failed to save keypair")
    .unwrap_or(0)
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_chatlist(
    context: *mut dc_context_t,
    flags: libc::c_int,
    query_str: *const libc::c_char,
    query_id: u32,
) -> *mut dc_chatlist_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_chatlist()");
        return ptr::null_mut();
    }
    let ctx = &*context;
    let qs = to_opt_string_lossy(query_str);

    let qi = if query_id == 0 { None } else { Some(query_id) };

    block_on(async move {
        match chatlist::Chatlist::try_load(&ctx, flags as usize, qs.as_deref(), qi).await {
            Ok(list) => {
                let ffi_list = ChatlistWrapper { context, list };
                Box::into_raw(Box::new(ffi_list))
            }
            Err(_) => ptr::null_mut(),
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_create_chat_by_msg_id(context: *mut dc_context_t, msg_id: u32) -> u32 {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_create_chat_by_msg_id()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        chat::create_by_msg_id(&ctx, MsgId::new(msg_id))
            .await
            .log_err(ctx, "Failed to create chat from msg_id")
            .map(|id| id.to_u32())
            .unwrap_or(0)
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_create_chat_by_contact_id(
    context: *mut dc_context_t,
    contact_id: u32,
) -> u32 {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_create_chat_by_contact_id()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        chat::create_by_contact_id(&ctx, contact_id)
            .await
            .log_err(ctx, "Failed to create chat from contact_id")
            .map(|id| id.to_u32())
            .unwrap_or(0)
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_chat_id_by_contact_id(
    context: *mut dc_context_t,
    contact_id: u32,
) -> u32 {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_chat_id_by_contact_id()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        chat::get_by_contact_id(&ctx, contact_id)
            .await
            .log_err(ctx, "Failed to get chat for contact_id")
            .map(|id| id.to_u32())
            .unwrap_or(0)
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_prepare_msg(
    context: *mut dc_context_t,
    chat_id: u32,
    msg: *mut dc_msg_t,
) -> u32 {
    if context.is_null() || chat_id == 0 || msg.is_null() {
        eprintln!("ignoring careless call to dc_prepare_msg()");
        return 0;
    }
    let ctx = &mut *context;
    let ffi_msg: &mut MessageWrapper = &mut *msg;

    block_on(async move {
        chat::prepare_msg(&ctx, ChatId::new(chat_id), &mut ffi_msg.message)
            .await
            .unwrap_or_log_default(&ctx, "Failed to prepare message")
    })
    .to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_send_msg(
    context: *mut dc_context_t,
    chat_id: u32,
    msg: *mut dc_msg_t,
) -> u32 {
    if context.is_null() || msg.is_null() {
        eprintln!("ignoring careless call to dc_send_msg()");
        return 0;
    }
    let ctx = &mut *context;
    let ffi_msg = &mut *msg;

    block_on(async move {
        chat::send_msg(&ctx, ChatId::new(chat_id), &mut ffi_msg.message)
            .await
            .unwrap_or_log_default(&ctx, "Failed to send message")
    })
    .to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_send_msg_sync(
    context: *mut dc_context_t,
    chat_id: u32,
    msg: *mut dc_msg_t,
) -> u32 {
    if context.is_null() || msg.is_null() {
        eprintln!("ignoring careless call to dc_send_msg_sync()");
        return 0;
    }
    let ctx = &mut *context;
    let ffi_msg = &mut *msg;

    block_on(async move {
        chat::send_msg_sync(&ctx, ChatId::new(chat_id), &mut ffi_msg.message)
            .await
            .unwrap_or_log_default(&ctx, "Failed to send message")
    })
    .to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_send_text_msg(
    context: *mut dc_context_t,
    chat_id: u32,
    text_to_send: *const libc::c_char,
) -> u32 {
    if context.is_null() || text_to_send.is_null() {
        eprintln!("ignoring careless call to dc_send_text_msg()");
        return 0;
    }
    let ctx = &*context;
    let text_to_send = to_string_lossy(text_to_send);

    block_on(async move {
        chat::send_text_msg(&ctx, ChatId::new(chat_id), text_to_send)
            .await
            .map(|msg_id| msg_id.to_u32())
            .unwrap_or_log_default(&ctx, "Failed to send text message")
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_send_videochat_invitation(
    context: *mut dc_context_t,
    chat_id: u32,
) -> u32 {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_send_videochat_invitation()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        chat::send_videochat_invitation(&ctx, ChatId::new(chat_id))
            .await
            .map(|msg_id| msg_id.to_u32())
            .unwrap_or_log_default(&ctx, "Failed to send video chat invitation")
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_draft(
    context: *mut dc_context_t,
    chat_id: u32,
    msg: *mut dc_msg_t,
) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_set_draft()");
        return;
    }
    let ctx = &*context;
    let msg = if msg.is_null() {
        None
    } else {
        let ffi_msg: &mut MessageWrapper = &mut *msg;
        Some(&mut ffi_msg.message)
    };

    block_on(ChatId::new(chat_id).set_draft(&ctx, msg))
}

#[no_mangle]
pub unsafe extern "C" fn dc_add_device_msg(
    context: *mut dc_context_t,
    label: *const libc::c_char,
    msg: *mut dc_msg_t,
) -> u32 {
    if context.is_null() || (label.is_null() && msg.is_null()) {
        eprintln!("ignoring careless call to dc_add_device_msg()");
        return 0;
    }
    let ctx = &mut *context;
    let msg = if msg.is_null() {
        None
    } else {
        let ffi_msg: &mut MessageWrapper = &mut *msg;
        Some(&mut ffi_msg.message)
    };

    block_on(async move {
        chat::add_device_msg(&ctx, to_opt_string_lossy(label).as_deref(), msg)
            .await
            .unwrap_or_log_default(&ctx, "Failed to add device message")
    })
    .to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_update_device_chats(context: *mut dc_context_t) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_update_device_chats()");
        return;
    }
    let ctx = &mut *context;

    block_on(async move {
        ctx.update_device_chats()
            .await
            .unwrap_or_log_default(&ctx, "Failed to add device message")
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_was_device_msg_ever_added(
    context: *mut dc_context_t,
    label: *const libc::c_char,
) -> libc::c_int {
    if context.is_null() || label.is_null() {
        eprintln!("ignoring careless call to dc_was_device_msg_ever_added()");
        return 0;
    }
    let ctx = &mut *context;

    block_on(async move {
        chat::was_device_msg_ever_added(&ctx, &to_string_lossy(label))
            .await
            .unwrap_or(false) as libc::c_int
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_draft(context: *mut dc_context_t, chat_id: u32) -> *mut dc_msg_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_draft()");
        return ptr::null_mut(); // NULL explicitly defined as "no draft"
    }
    let ctx = &*context;

    block_on(async move {
        match ChatId::new(chat_id).get_draft(&ctx).await {
            Ok(Some(draft)) => {
                let ffi_msg = MessageWrapper {
                    context,
                    message: draft,
                };
                Box::into_raw(Box::new(ffi_msg))
            }
            Ok(None) => ptr::null_mut(),
            Err(err) => {
                error!(ctx, "Failed to get draft for chat #{}: {}", chat_id, err);
                ptr::null_mut()
            }
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_chat_msgs(
    context: *mut dc_context_t,
    chat_id: u32,
    flags: u32,
    marker1before: u32,
) -> *mut dc_array::dc_array_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_chat_msgs()");
        return ptr::null_mut();
    }
    let ctx = &*context;
    let marker_flag = if marker1before <= DC_MSG_ID_LAST_SPECIAL {
        None
    } else {
        Some(MsgId::new(marker1before))
    };

    block_on(async move {
        Box::into_raw(Box::new(
            chat::get_chat_msgs(&ctx, ChatId::new(chat_id), flags, marker_flag)
                .await
                .into(),
        ))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_msg_cnt(context: *mut dc_context_t, chat_id: u32) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_msg_cnt()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move { ChatId::new(chat_id).get_msg_cnt(&ctx).await as libc::c_int })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_fresh_msg_cnt(
    context: *mut dc_context_t,
    chat_id: u32,
) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_fresh_msg_cnt()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move { ChatId::new(chat_id).get_fresh_msg_cnt(&ctx).await as libc::c_int })
}

#[no_mangle]
pub unsafe extern "C" fn dc_estimate_deletion_cnt(
    context: *mut dc_context_t,
    from_server: libc::c_int,
    seconds: i64,
) -> libc::c_int {
    if context.is_null() || seconds < 0 {
        eprintln!("ignoring careless call to dc_estimate_deletion_cnt()");
        return 0;
    }
    let ctx = &*context;
    block_on(async move {
        message::estimate_deletion_cnt(ctx, from_server != 0, seconds)
            .await
            .unwrap_or(0) as libc::c_int
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_fresh_msgs(
    context: *mut dc_context_t,
) -> *mut dc_array::dc_array_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_fresh_msgs()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        let arr = dc_array_t::from(
            ctx.get_fresh_msgs()
                .await
                .iter()
                .map(|msg_id| msg_id.to_u32())
                .collect::<Vec<u32>>(),
        );
        Box::into_raw(Box::new(arr))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_marknoticed_chat(context: *mut dc_context_t, chat_id: u32) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_marknoticed_chat()");
        return;
    }
    let ctx = &*context;

    block_on(async move {
        chat::marknoticed_chat(&ctx, ChatId::new(chat_id))
            .await
            .log_err(ctx, "Failed marknoticed chat")
            .unwrap_or(())
    })
}

fn from_prim<S, T>(s: S) -> Option<T>
where
    T: FromPrimitive,
    S: Into<i64>,
{
    FromPrimitive::from_i64(s.into())
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_chat_media(
    context: *mut dc_context_t,
    chat_id: u32,
    msg_type: libc::c_int,
    or_msg_type2: libc::c_int,
    or_msg_type3: libc::c_int,
) -> *mut dc_array::dc_array_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_chat_media()");
        return ptr::null_mut();
    }
    let ctx = &*context;
    let msg_type = from_prim(msg_type).expect(&format!("invalid msg_type = {}", msg_type));
    let or_msg_type2 =
        from_prim(or_msg_type2).expect(&format!("incorrect or_msg_type2 = {}", or_msg_type2));
    let or_msg_type3 =
        from_prim(or_msg_type3).expect(&format!("incorrect or_msg_type3 = {}", or_msg_type3));

    block_on(async move {
        Box::into_raw(Box::new(
            chat::get_chat_media(
                &ctx,
                ChatId::new(chat_id),
                msg_type,
                or_msg_type2,
                or_msg_type3,
            )
            .await
            .into(),
        ))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_next_media(
    context: *mut dc_context_t,
    msg_id: u32,
    dir: libc::c_int,
    msg_type: libc::c_int,
    or_msg_type2: libc::c_int,
    or_msg_type3: libc::c_int,
) -> u32 {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_next_media()");
        return 0;
    }
    let direction = if dir < 0 {
        chat::Direction::Backward
    } else {
        chat::Direction::Forward
    };

    let ctx = &*context;
    let msg_type = from_prim(msg_type).expect(&format!("invalid msg_type = {}", msg_type));
    let or_msg_type2 =
        from_prim(or_msg_type2).expect(&format!("incorrect or_msg_type2 = {}", or_msg_type2));
    let or_msg_type3 =
        from_prim(or_msg_type3).expect(&format!("incorrect or_msg_type3 = {}", or_msg_type3));

    block_on(async move {
        chat::get_next_media(
            &ctx,
            MsgId::new(msg_id),
            direction,
            msg_type,
            or_msg_type2,
            or_msg_type3,
        )
        .await
        .map(|msg_id| msg_id.to_u32())
        .unwrap_or(0)
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_chat_visibility(
    context: *mut dc_context_t,
    chat_id: u32,
    archive: libc::c_int,
) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_set_chat_visibility()");
        return;
    }
    let ctx = &*context;
    let visibility = match archive {
        0 => ChatVisibility::Normal,
        1 => ChatVisibility::Archived,
        2 => ChatVisibility::Pinned,
        _ => {
            warn!(
                ctx,
                "ignoring careless call to dc_set_chat_visibility(): unknown archived state",
            );
            return;
        }
    };

    block_on(async move {
        ChatId::new(chat_id)
            .set_visibility(&ctx, visibility)
            .await
            .log_err(ctx, "Failed setting chat visibility")
            .unwrap_or(())
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_delete_chat(context: *mut dc_context_t, chat_id: u32) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_delete_chat()");
        return;
    }
    let ctx = &*context;

    block_on(async move {
        ChatId::new(chat_id)
            .delete(&ctx)
            .await
            .log_err(ctx, "Failed chat delete")
            .unwrap_or(())
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_chat_contacts(
    context: *mut dc_context_t,
    chat_id: u32,
) -> *mut dc_array::dc_array_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_chat_contacts()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        let arr = dc_array_t::from(chat::get_chat_contacts(&ctx, ChatId::new(chat_id)).await);
        Box::into_raw(Box::new(arr))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_search_msgs(
    context: *mut dc_context_t,
    chat_id: u32,
    query: *const libc::c_char,
) -> *mut dc_array::dc_array_t {
    if context.is_null() || query.is_null() {
        eprintln!("ignoring careless call to dc_search_msgs()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        let arr = dc_array_t::from(
            ctx.search_msgs(ChatId::new(chat_id), to_string_lossy(query))
                .await
                .iter()
                .map(|msg_id| msg_id.to_u32())
                .collect::<Vec<u32>>(),
        );
        Box::into_raw(Box::new(arr))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_chat(context: *mut dc_context_t, chat_id: u32) -> *mut dc_chat_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_chat()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        match chat::Chat::load_from_db(&ctx, ChatId::new(chat_id)).await {
            Ok(chat) => {
                let ffi_chat = ChatWrapper { context, chat };
                Box::into_raw(Box::new(ffi_chat))
            }
            Err(_) => ptr::null_mut(),
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_create_group_chat(
    context: *mut dc_context_t,
    protect: libc::c_int,
    name: *const libc::c_char,
) -> u32 {
    if context.is_null() || name.is_null() {
        eprintln!("ignoring careless call to dc_create_group_chat()");
        return 0;
    }
    let ctx = &*context;
    let protect = if let Some(s) = contact::ProtectionStatus::from_i32(protect) {
        s
    } else {
        return 0;
    };

    block_on(async move {
        chat::create_group_chat(&ctx, protect, to_string_lossy(name))
            .await
            .log_err(ctx, "Failed to create group chat")
            .map(|id| id.to_u32())
            .unwrap_or(0)
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_is_contact_in_chat(
    context: *mut dc_context_t,
    chat_id: u32,
    contact_id: u32,
) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_is_contact_in_chat()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move { chat::is_contact_in_chat(&ctx, ChatId::new(chat_id), contact_id).await })
        .into()
}

#[no_mangle]
pub unsafe extern "C" fn dc_add_contact_to_chat(
    context: *mut dc_context_t,
    chat_id: u32,
    contact_id: u32,
) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_add_contact_to_chat()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        chat::add_contact_to_chat(&ctx, ChatId::new(chat_id), contact_id).await as libc::c_int
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_remove_contact_from_chat(
    context: *mut dc_context_t,
    chat_id: u32,
    contact_id: u32,
) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_remove_contact_from_chat()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        chat::remove_contact_from_chat(&ctx, ChatId::new(chat_id), contact_id)
            .await
            .map(|_| 1)
            .unwrap_or_log_default(&ctx, "Failed to remove contact")
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_chat_name(
    context: *mut dc_context_t,
    chat_id: u32,
    name: *const libc::c_char,
) -> libc::c_int {
    if context.is_null() || chat_id <= constants::DC_CHAT_ID_LAST_SPECIAL as u32 || name.is_null() {
        eprintln!("ignoring careless call to dc_set_chat_name()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        chat::set_chat_name(&ctx, ChatId::new(chat_id), to_string_lossy(name))
            .await
            .map(|_| 1)
            .unwrap_or_log_default(&ctx, "Failed to set chat name")
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_chat_profile_image(
    context: *mut dc_context_t,
    chat_id: u32,
    image: *const libc::c_char,
) -> libc::c_int {
    if context.is_null() || chat_id <= constants::DC_CHAT_ID_LAST_SPECIAL as u32 {
        eprintln!("ignoring careless call to dc_set_chat_profile_image()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        chat::set_chat_profile_image(&ctx, ChatId::new(chat_id), to_string_lossy(image))
            .await
            .map(|_| 1)
            .unwrap_or_log_default(&ctx, "Failed to set profile image")
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_chat_mute_duration(
    context: *mut dc_context_t,
    chat_id: u32,
    duration: i64,
) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_set_chat_mute_duration()");
        return 0;
    }
    let ctx = &*context;
    let muteDuration = match duration {
        0 => MuteDuration::NotMuted,
        -1 => MuteDuration::Forever,
        n if n > 0 => SystemTime::now()
            .checked_add(Duration::from_secs(duration as u64))
            .map_or(MuteDuration::Forever, MuteDuration::Until),
        _ => {
            warn!(
                ctx,
                "dc_chat_set_mute_duration(): Can not use negative duration other than -1",
            );
            return 0;
        }
    };

    block_on(async move {
        chat::set_muted(&ctx, ChatId::new(chat_id), muteDuration)
            .await
            .map(|_| 1)
            .unwrap_or_log_default(&ctx, "Failed to set mute duration")
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_chat_ephemeral_timer(
    context: *mut dc_context_t,
    chat_id: u32,
) -> u32 {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_chat_ephemeral_timer()");
        return 0;
    }
    let ctx = &*context;

    // Timer value 0 is returned in the rare case of a database error,
    // but it is not dangerous since it is only meant to be used as a
    // default when changing the value. Such errors should not be
    // ignored when ephemeral timer value is used to construct
    // message headers.
    block_on(async move { ChatId::new(chat_id).get_ephemeral_timer(ctx).await })
        .log_err(ctx, "Failed to get ephemeral timer")
        .unwrap_or_default()
        .to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_chat_ephemeral_timer(
    context: *mut dc_context_t,
    chat_id: u32,
    timer: u32,
) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_set_chat_ephemeral_timer()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        ChatId::new(chat_id)
            .set_ephemeral_timer(ctx, EphemeralTimer::from_u32(timer))
            .await
            .log_err(ctx, "Failed to set ephemeral timer")
            .is_ok() as libc::c_int
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_msg_info(
    context: *mut dc_context_t,
    msg_id: u32,
) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_msg_info()");
        return "".strdup();
    }
    let ctx = &*context;

    block_on(message::get_msg_info(&ctx, MsgId::new(msg_id))).strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_mime_headers(
    context: *mut dc_context_t,
    msg_id: u32,
) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_mime_headers()");
        return ptr::null_mut(); // NULL explicitly defined as "no mime headers"
    }
    let ctx = &*context;

    block_on(async move {
        message::get_mime_headers(&ctx, MsgId::new(msg_id))
            .await
            .map(|s| s.strdup())
            .unwrap_or_else(ptr::null_mut)
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_delete_msgs(
    context: *mut dc_context_t,
    msg_ids: *const u32,
    msg_cnt: libc::c_int,
) {
    if context.is_null() || msg_ids.is_null() || msg_cnt <= 0 {
        eprintln!("ignoring careless call to dc_delete_msgs()");
        return;
    }
    let ctx = &*context;
    let msg_ids = convert_and_prune_message_ids(msg_ids, msg_cnt);

    block_on(message::delete_msgs(&ctx, &msg_ids))
}

#[no_mangle]
pub unsafe extern "C" fn dc_forward_msgs(
    context: *mut dc_context_t,
    msg_ids: *const u32,
    msg_cnt: libc::c_int,
    chat_id: u32,
) {
    if context.is_null()
        || msg_ids.is_null()
        || msg_cnt <= 0
        || chat_id <= constants::DC_CHAT_ID_LAST_SPECIAL as u32
    {
        eprintln!("ignoring careless call to dc_forward_msgs()");
        return;
    }
    let msg_ids = convert_and_prune_message_ids(msg_ids, msg_cnt);
    let ctx = &*context;

    block_on(async move {
        chat::forward_msgs(&ctx, &msg_ids[..], ChatId::new(chat_id))
            .await
            .unwrap_or_log_default(&ctx, "Failed to forward message")
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_marknoticed_contact(context: *mut dc_context_t, contact_id: u32) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_marknoticed_contact()");
        return;
    }
    let ctx = &*context;

    block_on(Contact::mark_noticed(&ctx, contact_id))
}

#[no_mangle]
pub unsafe extern "C" fn dc_markseen_msgs(
    context: *mut dc_context_t,
    msg_ids: *const u32,
    msg_cnt: libc::c_int,
) {
    if context.is_null() || msg_ids.is_null() || msg_cnt <= 0 {
        eprintln!("ignoring careless call to dc_markseen_msgs()");
        return;
    }
    let msg_ids = convert_and_prune_message_ids(msg_ids, msg_cnt);
    let ctx = &*context;

    block_on(message::markseen_msgs(&ctx, msg_ids));
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_msg(context: *mut dc_context_t, msg_id: u32) -> *mut dc_msg_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_msg()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        let message = match message::Message::load_from_db(&ctx, MsgId::new(msg_id)).await {
            Ok(msg) => msg,
            Err(e) => {
                if msg_id <= constants::DC_MSG_ID_LAST_SPECIAL {
                    // C-core API returns empty messages, do the same
                    warn!(
                        &ctx,
                        "dc_get_msg called with special msg_id={}, returning empty msg", msg_id
                    );
                    message::Message::default()
                } else {
                    error!(
                        &ctx,
                        "dc_get_msg could not retrieve msg_id {}: {}", msg_id, e
                    );
                    return ptr::null_mut();
                }
            }
        };
        let ffi_msg = MessageWrapper { context, message };
        Box::into_raw(Box::new(ffi_msg))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_may_be_valid_addr(addr: *const libc::c_char) -> libc::c_int {
    if addr.is_null() {
        eprintln!("ignoring careless call to dc_may_be_valid_addr()");
        return 0;
    }

    contact::may_be_valid_addr(&to_string_lossy(addr)) as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_lookup_contact_id_by_addr(
    context: *mut dc_context_t,
    addr: *const libc::c_char,
) -> u32 {
    if context.is_null() || addr.is_null() {
        eprintln!("ignoring careless call to dc_lookup_contact_id_by_addr()");
        return 0;
    }
    let ctx = &*context;

    block_on(Contact::lookup_id_by_addr(
        &ctx,
        to_string_lossy(addr),
        Origin::IncomingReplyTo,
    ))
}

#[no_mangle]
pub unsafe extern "C" fn dc_create_contact(
    context: *mut dc_context_t,
    name: *const libc::c_char,
    addr: *const libc::c_char,
) -> u32 {
    if context.is_null() || addr.is_null() {
        eprintln!("ignoring careless call to dc_create_contact()");
        return 0;
    }
    let ctx = &*context;
    let name = to_string_lossy(name);

    block_on(async move {
        match Contact::create(&ctx, name, to_string_lossy(addr)).await {
            Ok(id) => id,
            Err(_) => 0,
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_add_address_book(
    context: *mut dc_context_t,
    addr_book: *const libc::c_char,
) -> libc::c_int {
    if context.is_null() || addr_book.is_null() {
        eprintln!("ignoring careless call to dc_add_address_book()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        match Contact::add_address_book(&ctx, to_string_lossy(addr_book)).await {
            Ok(cnt) => cnt as libc::c_int,
            Err(_) => 0,
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_contacts(
    context: *mut dc_context_t,
    flags: u32,
    query: *const libc::c_char,
) -> *mut dc_array::dc_array_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_contacts()");
        return ptr::null_mut();
    }
    let ctx = &*context;
    let query = to_opt_string_lossy(query);

    block_on(async move {
        match Contact::get_all(&ctx, flags, query).await {
            Ok(contacts) => Box::into_raw(Box::new(dc_array_t::from(contacts))),
            Err(_) => ptr::null_mut(),
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_blocked_cnt(context: *mut dc_context_t) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_blocked_cnt()");
        return 0;
    }
    let ctx = &*context;

    block_on(Contact::get_blocked_cnt(&ctx)) as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_blocked_contacts(
    context: *mut dc_context_t,
) -> *mut dc_array::dc_array_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_blocked_contacts()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        Box::into_raw(Box::new(dc_array_t::from(
            Contact::get_all_blocked(&ctx).await,
        )))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_block_contact(
    context: *mut dc_context_t,
    contact_id: u32,
    block: libc::c_int,
) {
    if context.is_null() || contact_id <= constants::DC_CONTACT_ID_LAST_SPECIAL as u32 {
        eprintln!("ignoring careless call to dc_block_contact()");
        return;
    }
    let ctx = &*context;
    block_on(async move {
        if block == 0 {
            Contact::unblock(&ctx, contact_id).await;
        } else {
            Contact::block(&ctx, contact_id).await;
        }
    });
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_contact_encrinfo(
    context: *mut dc_context_t,
    contact_id: u32,
) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_contact_encrinfo()");
        return "".strdup();
    }
    let ctx = &*context;

    block_on(async move {
        Contact::get_encrinfo(&ctx, contact_id)
            .await
            .map(|s| s.strdup())
            .unwrap_or_else(|e| {
                error!(&ctx, "{}", e);
                ptr::null_mut()
            })
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_delete_contact(
    context: *mut dc_context_t,
    contact_id: u32,
) -> libc::c_int {
    if context.is_null() || contact_id <= constants::DC_CONTACT_ID_LAST_SPECIAL as u32 {
        eprintln!("ignoring careless call to dc_delete_contact()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        match Contact::delete(&ctx, contact_id).await {
            Ok(_) => 1,
            Err(_) => 0,
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_contact(
    context: *mut dc_context_t,
    contact_id: u32,
) -> *mut dc_contact_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_contact()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        Contact::get_by_id(&ctx, contact_id)
            .await
            .map(|contact| Box::into_raw(Box::new(ContactWrapper { context, contact })))
            .unwrap_or_else(|_| ptr::null_mut())
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_imex(
    context: *mut dc_context_t,
    what_raw: libc::c_int,
    param1: *const libc::c_char,
    _param2: *const libc::c_char,
) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_imex()");
        return;
    }
    let what = match imex::ImexMode::from_i32(what_raw as i32) {
        Some(what) => what,
        None => {
            eprintln!("ignoring invalid argument {} to dc_imex", what_raw);
            return;
        }
    };

    let ctx = &*context;

    let param1 = to_opt_string_lossy(param1);

    spawn(async move {
        imex::imex(&ctx, what, param1)
            .await
            .log_err(ctx, "IMEX failed")
    });
}

#[no_mangle]
pub unsafe extern "C" fn dc_imex_has_backup(
    context: *mut dc_context_t,
    dir: *const libc::c_char,
) -> *mut libc::c_char {
    if context.is_null() || dir.is_null() {
        eprintln!("ignoring careless call to dc_imex_has_backup()");
        return ptr::null_mut(); // NULL explicitly defined as "has no backup"
    }
    let ctx = &*context;

    block_on(async move {
        match imex::has_backup(&ctx, to_string_lossy(dir)).await {
            Ok(res) => res.strdup(),
            Err(err) => {
                // do not bubble up error to the user,
                // the ui will expect that the file does not exist or cannot be accessed
                warn!(&ctx, "dc_imex_has_backup: {}", err);
                ptr::null_mut()
            }
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_initiate_key_transfer(context: *mut dc_context_t) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_initiate_key_transfer()");
        return ptr::null_mut(); // NULL explicitly defined as "error"
    }
    let ctx = &*context;

    block_on(async move {
        match imex::initiate_key_transfer(&ctx).await {
            Ok(res) => res.strdup(),
            Err(err) => {
                error!(&ctx, "dc_initiate_key_transfer(): {}", err);
                ptr::null_mut()
            }
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_continue_key_transfer(
    context: *mut dc_context_t,
    msg_id: u32,
    setup_code: *const libc::c_char,
) -> libc::c_int {
    if context.is_null()
        || msg_id <= constants::DC_MSG_ID_LAST_SPECIAL as u32
        || setup_code.is_null()
    {
        eprintln!("ignoring careless call to dc_continue_key_transfer()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        match imex::continue_key_transfer(&ctx, MsgId::new(msg_id), &to_string_lossy(setup_code))
            .await
        {
            Ok(()) => 1,
            Err(err) => {
                warn!(&ctx, "dc_continue_key_transfer: {}", err);
                0
            }
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_stop_ongoing_process(context: *mut dc_context_t) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_stop_ongoing_process()");
        return;
    }
    let ctx = &*context;
    block_on(ctx.stop_ongoing());
}

#[no_mangle]
pub unsafe extern "C" fn dc_check_qr(
    context: *mut dc_context_t,
    qr: *const libc::c_char,
) -> *mut dc_lot_t {
    if context.is_null() || qr.is_null() {
        eprintln!("ignoring careless call to dc_check_qr()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        let lot = qr::check_qr(&ctx, to_string_lossy(qr)).await;
        Box::into_raw(Box::new(lot))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_securejoin_qr(
    context: *mut dc_context_t,
    chat_id: u32,
) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_securejoin_qr()");
        return "".strdup();
    }
    let ctx = &*context;

    block_on(async move {
        securejoin::dc_get_securejoin_qr(&ctx, ChatId::new(chat_id))
            .await
            .unwrap_or_else(|| "".to_string())
            .strdup()
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_join_securejoin(
    context: *mut dc_context_t,
    qr: *const libc::c_char,
) -> u32 {
    if context.is_null() || qr.is_null() {
        eprintln!("ignoring careless call to dc_join_securejoin()");
        return 0;
    }
    let ctx = &*context;

    block_on(async move {
        securejoin::dc_join_securejoin(&ctx, &to_string_lossy(qr))
            .await
            .map(|chatid| chatid.to_u32())
            .log_err(ctx, "failed dc_join_securejoin() call")
            .unwrap_or_default()
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_send_locations_to_chat(
    context: *mut dc_context_t,
    chat_id: u32,
    seconds: libc::c_int,
) {
    if context.is_null() || chat_id <= constants::DC_CHAT_ID_LAST_SPECIAL as u32 || seconds < 0 {
        eprintln!("ignoring careless call to dc_send_locations_to_chat()");
        return;
    }
    let ctx = &*context;

    block_on(location::send_locations_to_chat(
        &ctx,
        ChatId::new(chat_id),
        seconds as i64,
    ));
}

#[no_mangle]
pub unsafe extern "C" fn dc_is_sending_locations_to_chat(
    context: *mut dc_context_t,
    chat_id: u32,
) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_is_sending_locations_to_chat()");
        return 0;
    }
    let ctx = &*context;

    block_on(location::is_sending_locations_to_chat(
        &ctx,
        ChatId::new(chat_id),
    )) as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_set_location(
    context: *mut dc_context_t,
    latitude: libc::c_double,
    longitude: libc::c_double,
    accuracy: libc::c_double,
) -> libc::c_int {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_set_location()");
        return 0;
    }
    let ctx = &*context;

    block_on(location::set(&ctx, latitude, longitude, accuracy)) as _
}

#[no_mangle]
pub unsafe extern "C" fn dc_get_locations(
    context: *mut dc_context_t,
    chat_id: u32,
    contact_id: u32,
    timestamp_begin: i64,
    timestamp_end: i64,
) -> *mut dc_array::dc_array_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_get_locations()");
        return ptr::null_mut();
    }
    let ctx = &*context;

    block_on(async move {
        let res = location::get_range(
            &ctx,
            ChatId::new(chat_id),
            contact_id,
            timestamp_begin as i64,
            timestamp_end as i64,
        )
        .await;
        Box::into_raw(Box::new(dc_array_t::from(res)))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_delete_all_locations(context: *mut dc_context_t) {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_delete_all_locations()");
        return;
    }
    let ctx = &*context;

    block_on(async move {
        location::delete_all(&ctx)
            .await
            .log_err(ctx, "Failed to delete locations")
            .ok()
    });
}

// dc_array_t

pub type dc_array_t = dc_array::dc_array_t;

#[no_mangle]
pub unsafe extern "C" fn dc_array_unref(a: *mut dc_array::dc_array_t) {
    if a.is_null() {
        eprintln!("ignoring careless call to dc_array_unref()");
        return;
    }

    Box::from_raw(a);
}

#[no_mangle]
pub unsafe extern "C" fn dc_array_get_cnt(array: *const dc_array_t) -> libc::size_t {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_cnt()");
        return 0;
    }

    (*array).len()
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_id(array: *const dc_array_t, index: libc::size_t) -> u32 {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_id()");
        return 0;
    }

    (*array).get_id(index)
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_latitude(
    array: *const dc_array_t,
    index: libc::size_t,
) -> libc::c_double {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_latitude()");
        return 0.0;
    }

    (*array).get_location(index).latitude
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_longitude(
    array: *const dc_array_t,
    index: libc::size_t,
) -> libc::c_double {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_longitude()");
        return 0.0;
    }

    (*array).get_location(index).longitude
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_accuracy(
    array: *const dc_array_t,
    index: libc::size_t,
) -> libc::c_double {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_accuracy()");
        return 0.0;
    }

    (*array).get_location(index).accuracy
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_timestamp(
    array: *const dc_array_t,
    index: libc::size_t,
) -> i64 {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_timestamp()");
        return 0;
    }

    (*array).get_timestamp(index).unwrap_or_default()
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_chat_id(
    array: *const dc_array_t,
    index: libc::size_t,
) -> libc::c_uint {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_chat_id()");
        return 0;
    }
    (*array).get_location(index).chat_id.to_u32()
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_contact_id(
    array: *const dc_array_t,
    index: libc::size_t,
) -> libc::c_uint {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_contact_id()");
        return 0;
    }

    (*array).get_location(index).contact_id
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_msg_id(
    array: *const dc_array_t,
    index: libc::size_t,
) -> libc::c_uint {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_msg_id()");
        return 0;
    }

    (*array).get_location(index).msg_id
}
#[no_mangle]
pub unsafe extern "C" fn dc_array_get_marker(
    array: *const dc_array_t,
    index: libc::size_t,
) -> *mut libc::c_char {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_get_marker()");
        return std::ptr::null_mut(); // NULL explicitly defined as "no markers"
    }

    if let Some(s) = (*array).get_marker(index) {
        s.strdup()
    } else {
        std::ptr::null_mut()
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_array_search_id(
    array: *const dc_array_t,
    needle: libc::c_uint,
    ret_index: *mut libc::size_t,
) -> libc::c_int {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_search_id()");
        return 0;
    }

    if let Some(i) = (*array).search_id(needle) {
        if !ret_index.is_null() {
            *ret_index = i
        }
        1
    } else {
        0
    }
}

// Return the independent-state of the location at the given index.
// Independent locations do not belong to the track of the user.
// Returns 1 if location belongs to the track of the user,
// 0 if location was reported independently.
#[no_mangle]
pub unsafe fn dc_array_is_independent(
    array: *const dc_array_t,
    index: libc::size_t,
) -> libc::c_int {
    if array.is_null() {
        eprintln!("ignoring careless call to dc_array_is_independent()");
        return 0;
    }

    (*array).get_location(index).independent as libc::c_int
}

// dc_chatlist_t

/// FFI struct for [dc_chatlist_t]
///
/// This is the structure behind [dc_chatlist_t] which is the opaque
/// structure representing a chatlist in the FFI API.  It exists
/// because the FFI API has a refernce from the message to the
/// context, but the Rust API does not, so the FFI layer needs to glue
/// these together.
pub struct ChatlistWrapper {
    context: *const dc_context_t,
    list: chatlist::Chatlist,
}

pub type dc_chatlist_t = ChatlistWrapper;

#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_unref(chatlist: *mut dc_chatlist_t) {
    if chatlist.is_null() {
        eprintln!("ignoring careless call to dc_chatlist_unref()");
        return;
    }
    Box::from_raw(chatlist);
}

#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_get_cnt(chatlist: *mut dc_chatlist_t) -> libc::size_t {
    if chatlist.is_null() {
        eprintln!("ignoring careless call to dc_chatlist_get_cnt()");
        return 0;
    }
    let ffi_list = &*chatlist;
    ffi_list.list.len() as libc::size_t
}

#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_get_chat_id(
    chatlist: *mut dc_chatlist_t,
    index: libc::size_t,
) -> u32 {
    if chatlist.is_null() {
        eprintln!("ignoring careless call to dc_chatlist_get_chat_id()");
        return 0;
    }
    let ffi_list = &*chatlist;
    ffi_list.list.get_chat_id(index as usize).to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_get_msg_id(
    chatlist: *mut dc_chatlist_t,
    index: libc::size_t,
) -> u32 {
    if chatlist.is_null() {
        eprintln!("ignoring careless call to dc_chatlist_get_msg_id()");
        return 0;
    }
    let ffi_list = &*chatlist;
    ffi_list
        .list
        .get_msg_id(index as usize)
        .map(|msg_id| msg_id.to_u32())
        .unwrap_or(0)
}

#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_get_summary(
    chatlist: *mut dc_chatlist_t,
    index: libc::size_t,
    chat: *mut dc_chat_t,
) -> *mut dc_lot_t {
    if chatlist.is_null() {
        eprintln!("ignoring careless call to dc_chatlist_get_summary()");
        return ptr::null_mut();
    }
    let maybe_chat = if chat.is_null() {
        None
    } else {
        let ffi_chat = &*chat;
        Some(&ffi_chat.chat)
    };
    let ffi_list = &*chatlist;
    let ctx = &*ffi_list.context;

    block_on(async move {
        let lot = ffi_list
            .list
            .get_summary(&ctx, index as usize, maybe_chat)
            .await;
        Box::into_raw(Box::new(lot))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_get_summary2(
    context: *mut dc_context_t,
    chat_id: u32,
    msg_id: u32,
) -> *mut dc_lot_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_chatlist_get_summary2()");
        return ptr::null_mut();
    }
    let ctx = &*context;
    block_on(async move {
        let lot =
            Chatlist::get_summary2(&ctx, ChatId::new(chat_id), MsgId::new(msg_id), None).await;
        Box::into_raw(Box::new(lot))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_get_context(
    chatlist: *mut dc_chatlist_t,
) -> *const dc_context_t {
    if chatlist.is_null() {
        eprintln!("ignoring careless call to dc_chatlist_get_context()");
        return ptr::null_mut();
    }
    let ffi_list = &*chatlist;
    ffi_list.context
}

// dc_chat_t

/// FFI struct for [dc_chat_t]
///
/// This is the structure behind [dc_chat_t] which is the opaque
/// structure representing a chat in the FFI API.  It exists
/// because the FFI API has a refernce from the message to the
/// context, but the Rust API does not, so the FFI layer needs to glue
/// these together.
pub struct ChatWrapper {
    context: *const dc_context_t,
    chat: chat::Chat,
}

pub type dc_chat_t = ChatWrapper;

#[no_mangle]
pub unsafe extern "C" fn dc_chat_unref(chat: *mut dc_chat_t) {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_unref()");
        return;
    }

    Box::from_raw(chat);
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_get_id(chat: *mut dc_chat_t) -> u32 {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_get_id()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.get_id().to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_get_type(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_get_type()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.get_type() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_get_name(chat: *mut dc_chat_t) -> *mut libc::c_char {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_get_name()");
        return "".strdup();
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.get_name().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_get_profile_image(chat: *mut dc_chat_t) -> *mut libc::c_char {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_get_profile_image()");
        return ptr::null_mut(); // NULL explicitly defined as "no image"
    }
    let ffi_chat = &*chat;
    let ctx = &*ffi_chat.context;

    block_on(async move {
        match ffi_chat.chat.get_profile_image(&ctx).await {
            Some(p) => p.to_string_lossy().strdup(),
            None => ptr::null_mut(),
        }
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_get_color(chat: *mut dc_chat_t) -> u32 {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_get_color()");
        return 0;
    }
    let ffi_chat = &*chat;
    let ctx = &*ffi_chat.context;

    block_on(ffi_chat.chat.get_color(&ctx))
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_get_visibility(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_get_visibility()");
        return 0;
    }
    let ffi_chat = &*chat;
    match ffi_chat.chat.visibility {
        ChatVisibility::Normal => 0,
        ChatVisibility::Archived => 1,
        ChatVisibility::Pinned => 2,
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_is_unpromoted(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_is_unpromoted()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.is_unpromoted() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_is_self_talk(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_is_self_talk()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.is_self_talk() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_is_device_talk(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_is_device_talk()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.is_device_talk() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_can_send(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_can_send()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.can_send() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_is_protected(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_is_protected()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.is_protected() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_is_sending_locations(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_is_sending_locations()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.is_sending_locations() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_is_muted(chat: *mut dc_chat_t) -> libc::c_int {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_is_muted()");
        return 0;
    }
    let ffi_chat = &*chat;
    ffi_chat.chat.is_muted() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_get_remaining_mute_duration(chat: *mut dc_chat_t) -> i64 {
    if chat.is_null() {
        eprintln!("ignoring careless call to dc_chat_get_remaining_mute_duration()");
        return 0;
    }
    let ffi_chat = &*chat;
    if !ffi_chat.chat.is_muted() {
        return 0;
    }
    // If the chat was muted to before the epoch, it is not muted.
    match ffi_chat.chat.mute_duration {
        MuteDuration::NotMuted => 0,
        MuteDuration::Forever => -1,
        MuteDuration::Until(when) => when
            .duration_since(SystemTime::now())
            .map(|d| d.as_secs() as i64)
            .unwrap_or(0),
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_chat_get_info_json(
    context: *mut dc_context_t,
    chat_id: u32,
) -> *mut libc::c_char {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_chat_get_info_json()");
        return "".strdup();
    }
    let ctx = &*context;

    block_on(async move {
        let chat = match chat::Chat::load_from_db(&ctx, ChatId::new(chat_id)).await {
            Ok(chat) => chat,
            Err(err) => {
                error!(&ctx, "dc_get_chat_info_json() failed to load chat: {}", err);
                return "".strdup();
            }
        };
        let info = match chat.get_info(&ctx).await {
            Ok(info) => info,
            Err(err) => {
                error!(
                    &ctx,
                    "dc_get_chat_info_json() failed to get chat info: {}", err
                );
                return "".strdup();
            }
        };
        serde_json::to_string(&info)
            .unwrap_or_log_default(&ctx, "dc_get_chat_info_json() failed to serialise to json")
            .strdup()
    })
}

// dc_msg_t

/// FFI struct for [dc_msg_t]
///
/// This is the structure behind [dc_msg_t] which is the opaque
/// structure representing a message in the FFI API.  It exists
/// because the FFI API has a refernce from the message to the
/// context, but the Rust API does not, so the FFI layer needs to glue
/// these together.
pub struct MessageWrapper {
    context: *const dc_context_t,
    message: message::Message,
}

pub type dc_msg_t = MessageWrapper;

#[no_mangle]
pub unsafe extern "C" fn dc_msg_new(
    context: *mut dc_context_t,
    viewtype: libc::c_int,
) -> *mut dc_msg_t {
    if context.is_null() {
        eprintln!("ignoring careless call to dc_msg_new()");
        return ptr::null_mut();
    }
    let context = &*context;
    let viewtype = from_prim(viewtype).expect(&format!("invalid viewtype = {}", viewtype));
    let msg = MessageWrapper {
        context,
        message: message::Message::new(viewtype),
    };
    Box::into_raw(Box::new(msg))
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_unref(msg: *mut dc_msg_t) {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_unref()");
        return;
    }

    Box::from_raw(msg);
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_id(msg: *mut dc_msg_t) -> u32 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_id()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_id().to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_from_id(msg: *mut dc_msg_t) -> u32 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_from_id()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_from_id()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_chat_id(msg: *mut dc_msg_t) -> u32 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_chat_id()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_chat_id().to_u32()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_viewtype(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_viewtype()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg
        .message
        .get_viewtype()
        .to_i64()
        .expect("impossible: Viewtype -> i64 conversion failed") as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_state(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_state()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_state() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_timestamp(msg: *mut dc_msg_t) -> i64 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_received_timestamp()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_timestamp()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_received_timestamp(msg: *mut dc_msg_t) -> i64 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_received_timestamp()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_received_timestamp()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_sort_timestamp(msg: *mut dc_msg_t) -> i64 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_sort_timestamp()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_sort_timestamp()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_text(msg: *mut dc_msg_t) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_text()");
        return "".strdup();
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_text().unwrap_or_default().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_file(msg: *mut dc_msg_t) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_file()");
        return "".strdup();
    }
    let ffi_msg = &*msg;
    let ctx = &*ffi_msg.context;
    ffi_msg
        .message
        .get_file(ctx)
        .map(|p| p.to_string_lossy().strdup())
        .unwrap_or_else(|| "".strdup())
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_filename(msg: *mut dc_msg_t) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_filename()");
        return "".strdup();
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_filename().unwrap_or_default().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_filemime(msg: *mut dc_msg_t) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_filemime()");
        return "".strdup();
    }
    let ffi_msg = &*msg;
    if let Some(x) = ffi_msg.message.get_filemime() {
        x.strdup()
    } else {
        "".strdup()
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_filebytes(msg: *mut dc_msg_t) -> u64 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_filebytes()");
        return 0;
    }
    let ffi_msg = &*msg;
    let ctx = &*ffi_msg.context;

    block_on(ffi_msg.message.get_filebytes(&ctx))
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_width(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_width()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_width()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_height(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_height()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_height()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_duration(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_duration()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_duration()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_showpadlock(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_showpadlock()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_showpadlock() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_ephemeral_timer(msg: *mut dc_msg_t) -> u32 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_ephemeral_timer()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_ephemeral_timer()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_ephemeral_timestamp(msg: *mut dc_msg_t) -> i64 {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_ephemeral_timer()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_ephemeral_timestamp()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_summary(
    msg: *mut dc_msg_t,
    chat: *mut dc_chat_t,
) -> *mut dc_lot_t {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_summary()");
        return ptr::null_mut();
    }
    let maybe_chat = if chat.is_null() {
        None
    } else {
        let ffi_chat = &*chat;
        Some(&ffi_chat.chat)
    };
    let ffi_msg = &mut *msg;
    let ctx = &*ffi_msg.context;

    block_on(async move {
        let lot = ffi_msg.message.get_summary(&ctx, maybe_chat).await;
        Box::into_raw(Box::new(lot))
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_summarytext(
    msg: *mut dc_msg_t,
    approx_characters: libc::c_int,
) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_summarytext()");
        return "".strdup();
    }
    let ffi_msg = &mut *msg;
    let ctx = &*ffi_msg.context;

    block_on({
        ffi_msg
            .message
            .get_summarytext(&ctx, approx_characters.try_into().unwrap_or_default())
    })
    .strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_has_deviating_timestamp(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_has_deviating_timestamp()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.has_deviating_timestamp().into()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_has_location(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_has_location()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.has_location() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_is_sent(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_is_sent()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.is_sent().into()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_is_forwarded(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_is_forwarded()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.is_forwarded().into()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_is_info(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_is_info()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.is_info().into()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_is_increation(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_is_increation()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.is_increation().into()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_is_setupmessage(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_is_setupmessage()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.is_setupmessage().into()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_videochat_url(msg: *mut dc_msg_t) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_videochat_url()");
        return "".strdup();
    }
    let ffi_msg = &*msg;

    ffi_msg
        .message
        .get_videochat_url()
        .unwrap_or_default()
        .strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_videochat_type(msg: *mut dc_msg_t) -> libc::c_int {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_videochat_type()");
        return 0;
    }
    let ffi_msg = &*msg;
    ffi_msg.message.get_videochat_type().unwrap_or_default() as i32
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_setupcodebegin(msg: *mut dc_msg_t) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_setupcodebegin()");
        return "".strdup();
    }
    let ffi_msg = &*msg;
    let ctx = &*ffi_msg.context;

    block_on(ffi_msg.message.get_setupcodebegin(&ctx))
        .unwrap_or_default()
        .strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_set_text(msg: *mut dc_msg_t, text: *const libc::c_char) {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_set_text()");
        return;
    }
    let ffi_msg = &mut *msg;
    ffi_msg.message.set_text(to_opt_string_lossy(text))
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_set_file(
    msg: *mut dc_msg_t,
    file: *const libc::c_char,
    filemime: *const libc::c_char,
) {
    if msg.is_null() || file.is_null() {
        eprintln!("ignoring careless call to dc_msg_set_file()");
        return;
    }
    let ffi_msg = &mut *msg;
    ffi_msg.message.set_file(
        to_string_lossy(file),
        to_opt_string_lossy(filemime).as_deref(),
    )
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_set_dimension(
    msg: *mut dc_msg_t,
    width: libc::c_int,
    height: libc::c_int,
) {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_set_dimension()");
        return;
    }
    let ffi_msg = &mut *msg;
    ffi_msg.message.set_dimension(width, height)
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_set_duration(msg: *mut dc_msg_t, duration: libc::c_int) {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_set_duration()");
        return;
    }
    let ffi_msg = &mut *msg;
    ffi_msg.message.set_duration(duration)
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_set_location(
    msg: *mut dc_msg_t,
    latitude: libc::c_double,
    longitude: libc::c_double,
) {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_set_location()");
        return;
    }
    let ffi_msg = &mut *msg;
    ffi_msg.message.set_location(latitude, longitude)
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_latefiling_mediasize(
    msg: *mut dc_msg_t,
    width: libc::c_int,
    height: libc::c_int,
    duration: libc::c_int,
) {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_latefiling_mediasize()");
        return;
    }
    let ffi_msg = &mut *msg;
    let ctx = &*ffi_msg.context;

    block_on({
        ffi_msg
            .message
            .latefiling_mediasize(&ctx, width, height, duration)
    });
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_error(msg: *mut dc_msg_t) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_error()");
        return ptr::null_mut();
    }
    let ffi_msg = &*msg;
    match ffi_msg.message.error() {
        Some(error) => error.strdup(),
        None => ptr::null_mut(),
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_set_quote(msg: *mut dc_msg_t, quote: *const dc_msg_t) {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_set_quote()");
        return;
    }
    let ffi_msg = &mut *msg;
    let ffi_quote = &*quote;

    block_on(async move {
        ffi_msg
            .message
            .set_quote(&*ffi_msg.context, &ffi_quote.message)
            .await
            .log_err(&*ffi_msg.context, "failed to set quote")
            .ok();
    });
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_quoted_text(msg: *const dc_msg_t) -> *mut libc::c_char {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_msg_get_quoted_text()");
        return ptr::null_mut();
    }
    let ffi_msg: &MessageWrapper = &*msg;
    ffi_msg
        .message
        .quoted_text()
        .map_or_else(ptr::null_mut, |s| s.strdup())
}

#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_quoted_msg(msg: *const dc_msg_t) -> *mut dc_msg_t {
    if msg.is_null() {
        eprintln!("ignoring careless call to dc_get_quoted_msg()");
        return ptr::null_mut();
    }
    let ffi_msg: &MessageWrapper = &*msg;
    let context = &*ffi_msg.context;
    let res = block_on(async move {
        ffi_msg
            .message
            .quoted_message(context)
            .await
            .log_err(context, "failed to get quoted message")
            .unwrap_or(None)
    });

    match res {
        Some(message) => Box::into_raw(Box::new(MessageWrapper { context, message })),
        None => ptr::null_mut(),
    }
}

// dc_contact_t

/// FFI struct for [dc_contact_t]
///
/// This is the structure behind [dc_contact_t] which is the opaque
/// structure representing a contact in the FFI API.  It exists
/// because the FFI API has a refernce from the message to the
/// context, but the Rust API does not, so the FFI layer needs to glue
/// these together.
pub struct ContactWrapper {
    context: *const dc_context_t,
    contact: contact::Contact,
}

pub type dc_contact_t = ContactWrapper;

#[no_mangle]
pub unsafe extern "C" fn dc_contact_unref(contact: *mut dc_contact_t) {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_unref()");
        return;
    }
    Box::from_raw(contact);
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_get_id(contact: *mut dc_contact_t) -> u32 {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_get_id()");
        return 0;
    }
    let ffi_contact = &*contact;
    ffi_contact.contact.get_id()
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_get_addr(contact: *mut dc_contact_t) -> *mut libc::c_char {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_get_addr()");
        return "".strdup();
    }
    let ffi_contact = &*contact;
    ffi_contact.contact.get_addr().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_get_name(contact: *mut dc_contact_t) -> *mut libc::c_char {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_get_name()");
        return "".strdup();
    }
    let ffi_contact = &*contact;
    ffi_contact.contact.get_name().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_get_display_name(
    contact: *mut dc_contact_t,
) -> *mut libc::c_char {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_get_display_name()");
        return "".strdup();
    }
    let ffi_contact = &*contact;
    ffi_contact.contact.get_display_name().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_get_name_n_addr(
    contact: *mut dc_contact_t,
) -> *mut libc::c_char {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_get_name_n_addr()");
        return "".strdup();
    }
    let ffi_contact = &*contact;
    ffi_contact.contact.get_name_n_addr().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_get_first_name(
    contact: *mut dc_contact_t,
) -> *mut libc::c_char {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_get_first_name()");
        return "".strdup();
    }
    let ffi_contact = &*contact;
    ffi_contact.contact.get_first_name().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_get_profile_image(
    contact: *mut dc_contact_t,
) -> *mut libc::c_char {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_get_profile_image()");
        return ptr::null_mut(); // NULL explicitly defined as "no profile image"
    }
    let ffi_contact = &*contact;
    let ctx = &*ffi_contact.context;

    block_on(async move {
        ffi_contact
            .contact
            .get_profile_image(&ctx)
            .await
            .map(|p| p.to_string_lossy().strdup())
            .unwrap_or_else(std::ptr::null_mut)
    })
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_get_color(contact: *mut dc_contact_t) -> u32 {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_get_color()");
        return 0;
    }
    let ffi_contact = &*contact;
    ffi_contact.contact.get_color()
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_is_blocked(contact: *mut dc_contact_t) -> libc::c_int {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_is_blocked()");
        return 0;
    }
    let ffi_contact = &*contact;
    ffi_contact.contact.is_blocked() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_contact_is_verified(contact: *mut dc_contact_t) -> libc::c_int {
    if contact.is_null() {
        eprintln!("ignoring careless call to dc_contact_is_verified()");
        return 0;
    }
    let ffi_contact = &*contact;
    let ctx = &*ffi_contact.context;

    block_on(async move { ffi_contact.contact.is_verified(&ctx).await as libc::c_int })
}

// dc_lot_t

pub type dc_lot_t = lot::Lot;

#[no_mangle]
pub unsafe extern "C" fn dc_lot_unref(lot: *mut dc_lot_t) {
    if lot.is_null() {
        eprintln!("ignoring careless call to dc_lot_unref()");
        return;
    }

    Box::from_raw(lot);
}

#[no_mangle]
pub unsafe extern "C" fn dc_lot_get_text1(lot: *mut dc_lot_t) -> *mut libc::c_char {
    if lot.is_null() {
        eprintln!("ignoring careless call to dc_lot_get_text1()");
        return ptr::null_mut(); // NULL explicitly defined as "there is no such text"
    }

    let lot = &*lot;
    lot.get_text1().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_lot_get_text2(lot: *mut dc_lot_t) -> *mut libc::c_char {
    if lot.is_null() {
        eprintln!("ignoring careless call to dc_lot_get_text2()");
        return ptr::null_mut(); // NULL explicitly defined as "there is no such text"
    }

    let lot = &*lot;
    lot.get_text2().strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_lot_get_text1_meaning(lot: *mut dc_lot_t) -> libc::c_int {
    if lot.is_null() {
        eprintln!("ignoring careless call to dc_lot_get_text1_meaning()");
        return 0;
    }

    let lot = &*lot;
    lot.get_text1_meaning() as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_lot_get_state(lot: *mut dc_lot_t) -> libc::c_int {
    if lot.is_null() {
        eprintln!("ignoring careless call to dc_lot_get_state()");
        return 0;
    }

    let lot = &*lot;
    lot.get_state().to_i64().expect("impossible") as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_lot_get_id(lot: *mut dc_lot_t) -> u32 {
    if lot.is_null() {
        eprintln!("ignoring careless call to dc_lot_get_id()");
        return 0;
    }

    let lot = &*lot;
    lot.get_id()
}

#[no_mangle]
pub unsafe extern "C" fn dc_lot_get_timestamp(lot: *mut dc_lot_t) -> i64 {
    if lot.is_null() {
        eprintln!("ignoring careless call to dc_lot_get_timestamp()");
        return 0;
    }

    let lot = &*lot;
    lot.get_timestamp()
}

#[no_mangle]
pub unsafe extern "C" fn dc_str_unref(s: *mut libc::c_char) {
    libc::free(s as *mut _)
}

trait ResultExt<T, E> {
    fn unwrap_or_log_default(self, context: &context::Context, message: &str) -> T;

    /// Log a warning to a [ContextWrapper] for an [Err] result.
    ///
    /// Does nothing for an [Ok].
    ///
    /// You can do this as soon as the wrapper exists, it does not
    /// have to be open (which is required for the `warn!()` macro).
    fn log_err(self, wrapper: &Context, message: &str) -> Result<T, E>;
}

impl<T: Default, E: std::fmt::Display> ResultExt<T, E> for Result<T, E> {
    fn unwrap_or_log_default(self, context: &context::Context, message: &str) -> T {
        match self {
            Ok(t) => t,
            Err(err) => {
                error!(context, "{}: {}", message, err);
                Default::default()
            }
        }
    }

    fn log_err(self, ctx: &Context, message: &str) -> Result<T, E> {
        self.map_err(|err| {
            // We are using Anyhow's .context() and to show the inner error, too, we need the {:#}:
            warn!(ctx, "{}: {:#}", message, err);
            err
        })
    }
}

trait ResultNullableExt<T> {
    fn into_raw(self) -> *mut T;
}

impl<T, E> ResultNullableExt<T> for Result<T, E> {
    fn into_raw(self) -> *mut T {
        match self {
            Ok(t) => Box::into_raw(Box::new(t)),
            Err(_) => ptr::null_mut(),
        }
    }
}

fn convert_and_prune_message_ids(msg_ids: *const u32, msg_cnt: libc::c_int) -> Vec<MsgId> {
    let ids = unsafe { std::slice::from_raw_parts(msg_ids, msg_cnt as usize) };
    let msg_ids: Vec<MsgId> = ids
        .iter()
        .filter(|id| **id > DC_MSG_ID_LAST_SPECIAL)
        .map(|id| MsgId::new(*id))
        .collect();

    msg_ids
}

// dc_provider_t

pub type dc_provider_t = provider::Provider;

#[no_mangle]
pub unsafe extern "C" fn dc_provider_new_from_email(
    context: *const dc_context_t,
    addr: *const libc::c_char,
) -> *const dc_provider_t {
    if context.is_null() || addr.is_null() {
        eprintln!("ignoring careless call to dc_provider_new_from_email()");
        return ptr::null();
    }
    let addr = to_string_lossy(addr);
    match provider::get_provider_info(addr.as_str()) {
        Some(provider) => provider,
        None => ptr::null_mut(),
    }
}

#[no_mangle]
pub unsafe extern "C" fn dc_provider_get_overview_page(
    provider: *const dc_provider_t,
) -> *mut libc::c_char {
    if provider.is_null() {
        eprintln!("ignoring careless call to dc_provider_get_overview_page()");
        return "".strdup();
    }
    let provider = &*provider;
    provider.overview_page.strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_provider_get_before_login_hint(
    provider: *const dc_provider_t,
) -> *mut libc::c_char {
    if provider.is_null() {
        eprintln!("ignoring careless call to dc_provider_get_before_login_hint()");
        return "".strdup();
    }
    let provider = &*provider;
    provider.before_login_hint.strdup()
}

#[no_mangle]
pub unsafe extern "C" fn dc_provider_get_status(provider: *const dc_provider_t) -> libc::c_int {
    if provider.is_null() {
        eprintln!("ignoring careless call to dc_provider_get_status()");
        return 0;
    }
    let provider = &*provider;
    provider.status as libc::c_int
}

#[no_mangle]
pub unsafe extern "C" fn dc_provider_unref(provider: *mut dc_provider_t) {
    if provider.is_null() {
        eprintln!("ignoring careless call to dc_provider_unref()");
        return;
    }
    // currently, there is nothing to free, the provider info is a static object.
    // this may change once we start localizing string.
}

// -- Accounts

/// Struct representing a list of deltachat accounts.
pub type dc_accounts_t = Accounts;

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_new(
    os_name: *const libc::c_char,
    dbfile: *const libc::c_char,
) -> *mut dc_accounts_t {
    setup_panic!();

    if dbfile.is_null() {
        eprintln!("ignoring careless call to dc_accounts_new()");
        return ptr::null_mut();
    }

    let os_name = if os_name.is_null() {
        String::from("DcFFI")
    } else {
        to_string_lossy(os_name)
    };

    let accs = block_on(Accounts::new(os_name, as_path(dbfile).to_path_buf().into()));

    match accs {
        Ok(accs) => Box::into_raw(Box::new(accs)),
        Err(err) => {
            // We are using Anyhow's .context() and to show the inner error, too, we need the {:#}:
            eprintln!("failed to create accounts: {:#}", err);
            ptr::null_mut()
        }
    }
}

/// Release the accounts structure.
///
/// This function releases the memory of the `dc_accounts_t` structure.
#[no_mangle]
pub unsafe extern "C" fn dc_accounts_unref(accounts: *mut dc_accounts_t) {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_unref()");
        return;
    }
    let _ = Box::from_raw(accounts);
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_get_account(
    accounts: *mut dc_accounts_t,
    id: u32,
) -> *mut dc_context_t {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_get_account()");
        return ptr::null_mut();
    }

    let accounts = &*accounts;
    block_on(accounts.get_account(id))
        .map(|ctx| Box::into_raw(Box::new(ctx)))
        .unwrap_or_else(std::ptr::null_mut)
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_get_selected_account(
    accounts: *mut dc_accounts_t,
) -> *mut dc_context_t {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_get_selected_account()");
        return ptr::null_mut();
    }

    let accounts = &*accounts;
    let ctx = block_on(accounts.get_selected_account());
    Box::into_raw(Box::new(ctx))
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_select_account(
    accounts: *mut dc_accounts_t,
    id: u32,
) -> libc::c_int {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_select_account()");
        return 0;
    }

    let accounts = &*accounts;
    block_on(accounts.select_account(id))
        .map(|_| 1)
        .unwrap_or(0)
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_add_account(accounts: *mut dc_accounts_t) -> u32 {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_add_account()");
        return 0;
    }

    let accounts = &*accounts;

    block_on(accounts.add_account()).unwrap_or(0)
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_remove_account(
    accounts: *mut dc_accounts_t,
    id: u32,
) -> libc::c_int {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_remove_account()");
        return 0;
    }

    let accounts = &*accounts;

    block_on(accounts.remove_account(id))
        .map(|_| 1)
        .unwrap_or_else(|_| 0)
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_migrate_account(
    accounts: *mut dc_accounts_t,
    dbfile: *const libc::c_char,
) -> u32 {
    if accounts.is_null() || dbfile.is_null() {
        eprintln!("ignoring careless call to dc_accounts_migrate_account()");
        return 0;
    }

    let accounts = &*accounts;
    let dbfile = to_string_lossy(dbfile);

    block_on(accounts.migrate_account(async_std::path::PathBuf::from(dbfile)))
        .map(|_| 1)
        .unwrap_or_else(|_| 0)
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_get_all(accounts: *mut dc_accounts_t) -> *mut dc_array_t {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_get_all()");
        return ptr::null_mut();
    }

    let accounts = &*accounts;
    let list = block_on(accounts.get_all());
    let array: dc_array_t = list.into();

    Box::into_raw(Box::new(array))
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_import_account(
    accounts: *mut dc_accounts_t,
    file: *const libc::c_char,
) -> u32 {
    if accounts.is_null() || file.is_null() {
        eprintln!("ignoring careless call to dc_accounts_import_account()");
        return 0;
    }

    let accounts = &*accounts;
    let file = to_string_lossy(file);
    block_on(accounts.import_account(async_std::path::PathBuf::from(file)))
        .map(|_| 1)
        .unwrap_or_else(|_| 0)
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_start_io(accounts: *mut dc_accounts_t) {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_start_io()");
        return;
    }

    let accounts = &*accounts;
    block_on(accounts.start_io());
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_stop_io(accounts: *mut dc_accounts_t) {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_stop_io()");
        return;
    }

    let accounts = &*accounts;
    block_on(accounts.stop_io());
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_maybe_network(accounts: *mut dc_accounts_t) {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_mabye_network()");
        return;
    }

    let accounts = &*accounts;
    block_on(accounts.maybe_network());
}

pub type dc_accounts_event_emitter_t = deltachat::accounts::EventEmitter;

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_get_event_emitter(
    accounts: *mut dc_accounts_t,
) -> *mut dc_accounts_event_emitter_t {
    if accounts.is_null() {
        eprintln!("ignoring careless call to dc_accounts_get_event_emitter()");
        return ptr::null_mut();
    }

    let accounts = &*accounts;
    let emitter = block_on(accounts.get_event_emitter());

    Box::into_raw(Box::new(emitter))
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_event_emitter_unref(
    emitter: *mut dc_accounts_event_emitter_t,
) {
    if emitter.is_null() {
        eprintln!("ignoring careless call to dc_accounts_event_emitter_unref()");
        return;
    }
    let _ = Box::from_raw(emitter);
}

#[no_mangle]
pub unsafe extern "C" fn dc_accounts_get_next_event(
    emitter: *mut dc_accounts_event_emitter_t,
) -> *mut dc_event_t {
    if emitter.is_null() {
        eprintln!("ignoring careless call to dc_accounts_get_next_event()");
        return ptr::null_mut();
    }
    let emitter = &mut *emitter;

    emitter
        .recv_sync()
        .map(|ev| Box::into_raw(Box::new(ev)))
        .unwrap_or_else(ptr::null_mut)
}