use quick_xml;
use quick_xml::events::{BytesEnd, BytesStart, BytesText};

use crate::chat;
use crate::constants::Event;
use crate::constants::*;
use crate::context::*;
use crate::dc_msg::*;
use crate::dc_tools::*;
use crate::job::*;
use crate::param::*;
use crate::sql;
use crate::stock::StockMessage;
use crate::types::*;
use crate::x::*;

// location handling
#[derive(Clone, Default)]
#[allow(non_camel_case_types)]
pub struct dc_location {
    pub location_id: uint32_t,
    pub latitude: libc::c_double,
    pub longitude: libc::c_double,
    pub accuracy: libc::c_double,
    pub timestamp: i64,
    pub contact_id: uint32_t,
    pub msg_id: uint32_t,
    pub chat_id: uint32_t,
    pub marker: Option<String>,
    pub independent: uint32_t,
}

impl dc_location {
    pub fn new() -> Self {
        dc_location {
            location_id: 0,
            latitude: 0.0,
            longitude: 0.0,
            accuracy: 0.0,
            timestamp: 0,
            contact_id: 0,
            msg_id: 0,
            chat_id: 0,
            marker: None,
            independent: 0,
        }
    }
}

#[derive(Clone)]
#[allow(non_camel_case_types)]
pub struct dc_kml_t {
    pub addr: *mut libc::c_char,
    pub locations: Option<Vec<dc_location>>,
    pub tag: libc::c_int,
    pub curr: dc_location,
}

impl dc_kml_t {
    pub fn new() -> Self {
        dc_kml_t {
            addr: std::ptr::null_mut(),
            locations: None,
            tag: 0,
            curr: dc_location::new(),
        }
    }
}

// location streaming
pub unsafe fn dc_send_locations_to_chat(context: &Context, chat_id: uint32_t, seconds: i64) {
    let now = time();
    let mut msg: Message;
    let is_sending_locations_before: bool;
    if !(seconds < 0 || chat_id <= 9i32 as libc::c_uint) {
        is_sending_locations_before = dc_is_sending_locations_to_chat(context, chat_id);
        if sql::execute(
            context,
            &context.sql,
            "UPDATE chats    \
             SET locations_send_begin=?,        \
             locations_send_until=?  \
             WHERE id=?",
            params![
                if 0 != seconds { now } else { 0 },
                if 0 != seconds { now + seconds } else { 0 },
                chat_id as i32,
            ],
        )
        .is_ok()
        {
            if 0 != seconds && !is_sending_locations_before {
                msg = dc_msg_new(context, Viewtype::Text);
                msg.text =
                    Some(context.stock_system_msg(StockMessage::MsgLocationEnabled, "", "", 0));
                msg.param.set_int(Param::Cmd, 8);
                chat::send_msg(context, chat_id, &mut msg).unwrap();
            } else if 0 == seconds && is_sending_locations_before {
                let stock_str =
                    context.stock_system_msg(StockMessage::MsgLocationDisabled, "", "", 0);
                chat::add_device_msg(context, chat_id, stock_str);
            }
            context.call_cb(
                Event::CHAT_MODIFIED,
                chat_id as uintptr_t,
                0i32 as uintptr_t,
            );
            if 0 != seconds {
                schedule_MAYBE_SEND_LOCATIONS(context, 0i32);
                job_add(
                    context,
                    Action::MaybeSendLocationsEnded,
                    chat_id as libc::c_int,
                    Params::new(),
                    seconds + 1,
                );
            }
        }
    }
}

/*******************************************************************************
 * job to send locations out to all chats that want them
 ******************************************************************************/
#[allow(non_snake_case)]
unsafe fn schedule_MAYBE_SEND_LOCATIONS(context: &Context, flags: libc::c_int) {
    if 0 != flags & 0x1 || !job_action_exists(context, Action::MaybeSendLocations) {
        job_add(context, Action::MaybeSendLocations, 0, Params::new(), 60);
    };
}

pub fn dc_is_sending_locations_to_chat(context: &Context, chat_id: u32) -> bool {
    context
        .sql
        .exists(
            "SELECT id  FROM chats  WHERE (? OR id=?)   AND locations_send_until>?;",
            params![if chat_id == 0 { 1 } else { 0 }, chat_id as i32, time()],
        )
        .unwrap_or_default()
}

pub fn dc_set_location(
    context: &Context,
    latitude: libc::c_double,
    longitude: libc::c_double,
    accuracy: libc::c_double,
) -> libc::c_int {
    if latitude == 0.0 && longitude == 0.0 {
        return 1;
    }

    context.sql.query_map(
        "SELECT id FROM chats WHERE locations_send_until>?;",
        params![time()], |row| row.get::<_, i32>(0),
        |chats| {
            let mut continue_streaming = false;

            for chat in chats {
                let chat_id = chat?;
                context.sql.execute(
                    "INSERT INTO locations  \
                     (latitude, longitude, accuracy, timestamp, chat_id, from_id) VALUES (?,?,?,?,?,?);",
                    params![
                        latitude,
                        longitude,
                        accuracy,
                        time(),
                        chat_id,
                        1,
                    ]
                )?;
                continue_streaming = true;
            }
            if continue_streaming {
                context.call_cb(Event::LOCATION_CHANGED, 1, 0);
            };
            unsafe { schedule_MAYBE_SEND_LOCATIONS(context, 0) };
            Ok(continue_streaming as libc::c_int)
        }
    ).unwrap_or_default()
}

pub fn dc_get_locations(
    context: &Context,
    chat_id: uint32_t,
    contact_id: uint32_t,
    timestamp_from: i64,
    mut timestamp_to: i64,
) -> Vec<dc_location> {
    if timestamp_to == 0 {
        timestamp_to = time() + 10;
    }

    context
        .sql
        .query_map(
            "SELECT l.id, l.latitude, l.longitude, l.accuracy, l.timestamp, l.independent, \
             m.id, l.from_id, l.chat_id, m.txt \
             FROM locations l  LEFT JOIN msgs m ON l.id=m.location_id  WHERE (? OR l.chat_id=?) \
             AND (? OR l.from_id=?) \
             AND (l.independent=1 OR (l.timestamp>=? AND l.timestamp<=?)) \
             ORDER BY l.timestamp DESC, l.id DESC, m.id DESC;",
            params![
                if chat_id == 0 { 1 } else { 0 },
                chat_id as i32,
                if contact_id == 0 { 1 } else { 0 },
                contact_id as i32,
                timestamp_from,
                timestamp_to,
            ],
            |row| {
                let msg_id = row.get(6)?;
                let txt: String = row.get(9)?;
                let marker = if msg_id != 0 && is_marker(&txt) {
                    Some(txt)
                } else {
                    None
                };

                let loc = dc_location {
                    location_id: row.get(0)?,
                    latitude: row.get(1)?,
                    longitude: row.get(2)?,
                    accuracy: row.get(3)?,
                    timestamp: row.get(4)?,
                    independent: row.get(5)?,
                    msg_id,
                    contact_id: row.get(7)?,
                    chat_id: row.get(8)?,
                    marker,
                };
                Ok(loc)
            },
            |locations| {
                let mut ret = Vec::new();

                for location in locations {
                    ret.push(location?);
                }
                Ok(ret)
            },
        )
        .unwrap_or_default()
}

fn is_marker(txt: &str) -> bool {
    txt.len() == 1 && txt.chars().next().unwrap() != ' '
}

pub fn dc_delete_all_locations(context: &Context) -> bool {
    if sql::execute(context, &context.sql, "DELETE FROM locations;", params![]).is_err() {
        return false;
    }
    context.call_cb(Event::LOCATION_CHANGED, 0, 0);
    true
}

pub fn dc_get_location_kml(
    context: &Context,
    chat_id: uint32_t,
    last_added_location_id: *mut uint32_t,
) -> *mut libc::c_char {
    let mut success: libc::c_int = 0;
    let now = time();
    let mut location_count: libc::c_int = 0;
    let mut ret = String::new();

    let self_addr = context
        .sql
        .get_config(context, "configured_addr")
        .unwrap_or_default();

    if let Ok((locations_send_begin, locations_send_until, locations_last_sent)) = context.sql.query_row(
        "SELECT locations_send_begin, locations_send_until, locations_last_sent  FROM chats  WHERE id=?;",
        params![chat_id as i32], |row| {
            let send_begin: i64 = row.get(0)?;
            let send_until: i64 = row.get(1)?;
            let last_sent: i64 = row.get(2)?;

            Ok((send_begin, send_until, last_sent))
        }
    ) {
        if !(locations_send_begin == 0 || now > locations_send_until) {
            ret += &format!(
                "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n<Document addr=\"{}\">\n",
                self_addr,
            );

            context.sql.query_map(
                "SELECT id, latitude, longitude, accuracy, timestamp\
                 FROM locations  WHERE from_id=? \
                 AND timestamp>=? \
                 AND (timestamp>=? OR timestamp=(SELECT MAX(timestamp) FROM locations WHERE from_id=?)) \
                 AND independent=0 \
                 GROUP BY timestamp \
                 ORDER BY timestamp;",
                params![1, locations_send_begin, locations_last_sent, 1],
                |row| {
                    let location_id: i32 = row.get(0)?;
                    let latitude: f64 = row.get(1)?;
                    let longitude: f64 = row.get(2)?;
                    let accuracy: f64 = row.get(3)?;
                    let timestamp = unsafe { get_kml_timestamp(row.get(4)?) };

                    Ok((location_id, latitude, longitude, accuracy, timestamp))
                },
                |rows| {
                    for row in rows {
                        let (location_id, latitude, longitude, accuracy, timestamp) = row?;
                        ret += &format!(
                            "<Placemark><Timestamp><when>{}</when></Timestamp><Point><coordinates accuracy=\"{}\">{},{}</coordinates></Point></Placemark>\n\x00",
                            as_str(timestamp),
                            accuracy,
                            longitude,
                            latitude
                        );
                        location_count += 1;
                        if !last_added_location_id.is_null() {
                            unsafe { *last_added_location_id = location_id as u32 };
                        }
                        unsafe { free(timestamp as *mut libc::c_void) };
                    }
                    Ok(())
                }
            ).unwrap(); // TODO: better error handling
        }
    }

    if location_count > 0 {
        ret += "</Document>\n</kml>";
        success = 1;
    }

    if 0 != success {
        unsafe { ret.strdup() }
    } else {
        std::ptr::null_mut()
    }
}

/*******************************************************************************
 * create kml-files
 ******************************************************************************/
unsafe fn get_kml_timestamp(utc: i64) -> *mut libc::c_char {
    // Returns a string formatted as YYYY-MM-DDTHH:MM:SSZ. The trailing `Z` indicates UTC.
    let res = chrono::NaiveDateTime::from_timestamp(utc, 0)
        .format("%Y-%m-%dT%H:%M:%SZ")
        .to_string();
    res.strdup()
}

pub unsafe fn dc_get_message_kml(
    timestamp: i64,
    latitude: libc::c_double,
    longitude: libc::c_double,
) -> *mut libc::c_char {
    let timestamp_str = get_kml_timestamp(timestamp);
    let latitude_str = dc_ftoa(latitude);
    let longitude_str = dc_ftoa(longitude);

    let ret = dc_mprintf(
        b"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\
         <kml xmlns=\"http://www.opengis.net/kml/2.2\">\n\
         <Document>\n\
         <Placemark>\
         <Timestamp><when>%s</when></Timestamp>\
         <Point><coordinates>%s,%s</coordinates></Point>\
         </Placemark>\n\
         </Document>\n\
         </kml>\x00" as *const u8 as *const libc::c_char,
        timestamp_str,
        longitude_str, // reverse order!
        latitude_str,
    );

    free(latitude_str as *mut libc::c_void);
    free(longitude_str as *mut libc::c_void);
    free(timestamp_str as *mut libc::c_void);

    ret
}

pub fn dc_set_kml_sent_timestamp(context: &Context, chat_id: u32, timestamp: i64) -> bool {
    sql::execute(
        context,
        &context.sql,
        "UPDATE chats SET locations_last_sent=? WHERE id=?;",
        params![timestamp, chat_id as i32],
    )
    .is_ok()
}

pub fn dc_set_msg_location_id(context: &Context, msg_id: u32, location_id: u32) -> bool {
    sql::execute(
        context,
        &context.sql,
        "UPDATE msgs SET location_id=? WHERE id=?;",
        params![location_id, msg_id as i32],
    )
    .is_ok()
}

pub unsafe fn dc_save_locations(
    context: &Context,
    chat_id: u32,
    contact_id: u32,
    locations_opt: &Option<Vec<dc_location>>,
    independent: libc::c_int,
) -> u32 {
    if chat_id <= 9 || locations_opt.is_none() {
        return 0;
    }

    let locations = locations_opt.as_ref().unwrap();
    context
        .sql
        .prepare2(
            "SELECT id FROM locations WHERE timestamp=? AND from_id=?",
            "INSERT INTO locations\
             (timestamp, from_id, chat_id, latitude, longitude, accuracy, independent) \
             VALUES (?,?,?,?,?,?,?);",
            |mut stmt_test, mut stmt_insert, conn| {
                let mut newest_timestamp = 0;
                let mut newest_location_id = 0;

                for location in locations {
                    let exists =
                        stmt_test.exists(params![location.timestamp, contact_id as i32])?;

                    if 0 != independent || !exists {
                        stmt_insert.execute(params![
                            location.timestamp,
                            contact_id as i32,
                            chat_id as i32,
                            location.latitude,
                            location.longitude,
                            location.accuracy,
                            independent,
                        ])?;

                        if location.timestamp > newest_timestamp {
                            newest_timestamp = location.timestamp;
                            newest_location_id = sql::get_rowid2_with_conn(
                                context,
                                conn,
                                "locations",
                                "timestamp",
                                location.timestamp,
                                "from_id",
                                contact_id as i32,
                            );
                        }
                    }
                }
                Ok(newest_location_id)
            },
        )
        .unwrap_or_default()
}

pub unsafe fn dc_kml_parse(
    context: &Context,
    content: *const libc::c_char,
    content_bytes: size_t,
) -> dc_kml_t {
    let mut kml = dc_kml_t::new();

    if content_bytes > (1 * 1024 * 1024) {
        warn!(
            context,
            0, "A kml-files with {} bytes is larger than reasonably expected.", content_bytes,
        );
        return kml;
    }

    let content_null = dc_null_terminate(content, content_bytes as libc::c_int);
    if !content_null.is_null() {
        let mut reader = quick_xml::Reader::from_str(as_str(content_null));
        reader.trim_text(true);

        kml.locations = Some(Vec::with_capacity(100));

        let mut buf = Vec::new();

        loop {
            match reader.read_event(&mut buf) {
                Ok(quick_xml::events::Event::Start(ref e)) => kml_starttag_cb(e, &mut kml, &reader),
                Ok(quick_xml::events::Event::End(ref e)) => kml_endtag_cb(e, &mut kml),
                Ok(quick_xml::events::Event::Text(ref e)) => kml_text_cb(e, &mut kml, &reader),
                Err(e) => {
                    error!(
                        context,
                        0,
                        "Location parsing: Error at position {}: {:?}",
                        reader.buffer_position(),
                        e
                    );
                }
                Ok(quick_xml::events::Event::Eof) => break,
                _ => (),
            }
            buf.clear();
        }
    }

    free(content_null.cast());

    kml
}

fn kml_text_cb<B: std::io::BufRead>(
    event: &BytesText,
    kml: &mut dc_kml_t,
    reader: &quick_xml::Reader<B>,
) {
    if 0 != kml.tag & (0x4 | 0x10) {
        let val = event.unescape_and_decode(reader).unwrap_or_default();

        let val = val
            .replace("\n", "")
            .replace("\r", "")
            .replace("\t", "")
            .replace(" ", "");

        if 0 != kml.tag & 0x4 && val.len() >= 19 {
            // YYYY-MM-DDTHH:MM:SSZ
            // 0   4  7  10 13 16 19
            match chrono::NaiveDateTime::parse_from_str(&val, "%Y-%m-%dT%H:%M:%SZ") {
                Ok(res) => {
                    kml.curr.timestamp = res.timestamp();
                    if kml.curr.timestamp > time() {
                        kml.curr.timestamp = time();
                    }
                }
                Err(_err) => {
                    kml.curr.timestamp = time();
                }
            }
        } else if 0 != kml.tag & 0x10 {
            let parts = val.splitn(2, ',').collect::<Vec<_>>();
            if parts.len() == 2 {
                kml.curr.longitude = parts[0].parse().unwrap_or_default();
                kml.curr.latitude = parts[1].parse().unwrap_or_default();
            }
        }
    }
}

fn kml_endtag_cb(event: &BytesEnd, kml: &mut dc_kml_t) {
    let tag = String::from_utf8_lossy(event.name()).trim().to_lowercase();

    if tag == "placemark" {
        if 0 != kml.tag & 0x1
            && 0 != kml.curr.timestamp
            && 0. != kml.curr.latitude
            && 0. != kml.curr.longitude
        {
            if let Some(ref mut locations) = kml.locations {
                locations.push(std::mem::replace(&mut kml.curr, dc_location::new()));
            }
        }
        kml.tag = 0
    };
}

fn kml_starttag_cb<B: std::io::BufRead>(
    event: &BytesStart,
    kml: &mut dc_kml_t,
    reader: &quick_xml::Reader<B>,
) {
    let tag = String::from_utf8_lossy(event.name()).trim().to_lowercase();
    if tag == "document" {
        if let Some(addr) = event.attributes().find(|attr| {
            attr.as_ref()
                .map(|a| String::from_utf8_lossy(a.key).trim().to_lowercase() == "addr")
                .unwrap_or_default()
        }) {
            kml.addr = unsafe {
                addr.unwrap()
                    .unescape_and_decode_value(reader)
                    .unwrap_or_default()
                    .strdup()
            };
        }
    } else if tag == "placemark" {
        kml.tag = 0x1;
        kml.curr.timestamp = 0;
        kml.curr.latitude = 0 as libc::c_double;
        kml.curr.longitude = 0.0f64;
        kml.curr.accuracy = 0.0f64
    } else if tag == "timestamp" && 0 != kml.tag & 0x1 {
        kml.tag = 0x1 | 0x2
    } else if tag == "when" && 0 != kml.tag & 0x2 {
        kml.tag = 0x1 | 0x2 | 0x4
    } else if tag == "point" && 0 != kml.tag & 0x1 {
        kml.tag = 0x1 | 0x8
    } else if tag == "coordinates" && 0 != kml.tag & 0x8 {
        kml.tag = 0x1 | 0x8 | 0x10;
        if let Some(acc) = event.attributes().find(|attr| {
            attr.as_ref()
                .map(|a| String::from_utf8_lossy(a.key).trim().to_lowercase() == "accuracy")
                .unwrap_or_default()
        }) {
            let v = acc
                .unwrap()
                .unescape_and_decode_value(reader)
                .unwrap_or_default();

            kml.curr.accuracy = v.trim().parse().unwrap_or_default();
        }
    }
}

pub unsafe fn dc_kml_unref(kml: &mut dc_kml_t) {
    free(kml.addr as *mut libc::c_void);
}

#[allow(non_snake_case)]
pub unsafe fn dc_job_do_DC_JOB_MAYBE_SEND_LOCATIONS(context: &Context, _job: &Job) {
    let now = time();
    let mut continue_streaming: libc::c_int = 1;
    info!(
        context,
        0, " ----------------- MAYBE_SEND_LOCATIONS -------------- ",
    );

    context
        .sql
        .query_map(
            "SELECT id, locations_send_begin, locations_last_sent \
             FROM chats \
             WHERE locations_send_until>?;",
            params![now],
            |row| {
                let chat_id: i32 = row.get(0)?;
                let locations_send_begin: i64 = row.get(1)?;
                let locations_last_sent: i64 = row.get(2)?;
                continue_streaming = 1;

                // be a bit tolerant as the timer may not align exactly with time(NULL)
                if now - locations_last_sent < (60 - 3) {
                    Ok(None)
                } else {
                    Ok(Some((chat_id, locations_send_begin, locations_last_sent)))
                }
            },
            |rows| {
                context.sql.prepare(
                    "SELECT id \
                     FROM locations \
                     WHERE from_id=? \
                     AND timestamp>=? \
                     AND timestamp>? \
                     AND independent=0 \
                     ORDER BY timestamp;",
                    |mut stmt_locations, _| {
                        for (chat_id, locations_send_begin, locations_last_sent) in
                            rows.filter_map(|r| match r {
                                Ok(Some(v)) => Some(v),
                                _ => None,
                            })
                        {
                            // TODO: do I need to reset?
                            if !stmt_locations
                                .exists(params![1, locations_send_begin, locations_last_sent,])
                                .unwrap_or_default()
                            {
                                // if there is no new location, there's nothing to send.
                                // however, maybe we want to bypass this test eg. 15 minutes
                                continue;
                            }
                            // pending locations are attached automatically to every message,
                            // so also to this empty text message.
                            // DC_CMD_LOCATION is only needed to create a nicer subject.
                            //
                            // for optimisation and to avoid flooding the sending queue,
                            // we could sending these messages only if we're really online.
                            // the easiest way to determine this, is to check for an empty message queue.
                            // (might not be 100%, however, as positions are sent combined later
                            // and dc_set_location() is typically called periodically, this is ok)
                            let mut msg = dc_msg_new(context, Viewtype::Text);
                            msg.hidden = true;
                            msg.param.set_int(Param::Cmd, 9);
                            // TODO: handle cleanup on error
                            chat::send_msg(context, chat_id as u32, &mut msg).unwrap();
                        }
                        Ok(())
                    },
                )
            },
        )
        .unwrap(); // TODO: Better error handling

    if 0 != continue_streaming {
        schedule_MAYBE_SEND_LOCATIONS(context, 0x1);
    }
}

#[allow(non_snake_case)]
pub unsafe fn dc_job_do_DC_JOB_MAYBE_SEND_LOC_ENDED(context: &Context, job: &mut Job) {
    // this function is called when location-streaming _might_ have ended for a chat.
    // the function checks, if location-streaming is really ended;
    // if so, a device-message is added if not yet done.

    let chat_id = (*job).foreign_id;

    if let Ok((send_begin, send_until)) = context.sql.query_row(
        "SELECT locations_send_begin, locations_send_until  FROM chats  WHERE id=?",
        params![chat_id as i32],
        |row| Ok((row.get::<_, i64>(0)?, row.get::<_, i64>(1)?)),
    ) {
        if !(send_begin != 0 && time() <= send_until) {
            // still streaming -
            // may happen as several calls to dc_send_locations_to_chat()
            // do not un-schedule pending DC_MAYBE_SEND_LOC_ENDED jobs
            if !(send_begin == 0 && send_until == 0) {
                // not streaming, device-message already sent
                if context.sql.execute(
                    "UPDATE chats    SET locations_send_begin=0, locations_send_until=0  WHERE id=?",
                    params![chat_id as i32],
                ).is_ok() {
                    let stock_str = context.stock_system_msg(StockMessage::MsgLocationDisabled, "", "", 0);
                    chat::add_device_msg(context, chat_id, stock_str);
                    context.call_cb(
                        Event::CHAT_MODIFIED,
                        chat_id as usize,
                        0,
                    );
                }
            }
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::test_utils::dummy_context;

    #[test]
    fn test_dc_kml_parse() {
        unsafe {
            let context = dummy_context();

            let xml =
                b"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n<Document addr=\"user@example.org\">\n<Placemark><Timestamp><when>2019-03-06T21:09:57Z</when></Timestamp><Point><coordinates accuracy=\"32.000000\">9.423110,53.790302</coordinates></Point></Placemark>\n<PlaceMARK>\n<Timestamp><WHEN > \n\t2018-12-13T22:11:12Z\t</WHEN></Timestamp><Point><coordinates aCCuracy=\"2.500000\"> 19.423110 \t , \n 63.790302\n </coordinates></Point></PlaceMARK>\n</Document>\n</kml>\x00"
                as *const u8 as *const libc::c_char;

            let mut kml = dc_kml_parse(&context.ctx, xml, strlen(xml));

            assert!(!kml.addr.is_null());
            assert_eq!(as_str(kml.addr as *const libc::c_char), "user@example.org",);

            let locations_ref = &kml.locations.as_ref().unwrap();
            assert_eq!(locations_ref.len(), 2);

            assert!(locations_ref[0].latitude > 53.6f64);
            assert!(locations_ref[0].latitude < 53.8f64);
            assert!(locations_ref[0].longitude > 9.3f64);
            assert!(locations_ref[0].longitude < 9.5f64);
            assert!(locations_ref[0].accuracy > 31.9f64);
            assert!(locations_ref[0].accuracy < 32.1f64);
            assert_eq!(locations_ref[0].timestamp, 1551906597);

            assert!(locations_ref[1].latitude > 63.6f64);
            assert!(locations_ref[1].latitude < 63.8f64);
            assert!(locations_ref[1].longitude > 19.3f64);
            assert!(locations_ref[1].longitude < 19.5f64);
            assert!(locations_ref[1].accuracy > 2.4f64);
            assert!(locations_ref[1].accuracy < 2.6f64);
            assert_eq!(locations_ref[1].timestamp, 1544739072);

            dc_kml_unref(&mut kml);
        }
    }
}