use crate::dc_location::dc_location;
use crate::dc_tools::*;
use crate::types::*;

/* * the structure behind dc_array_t */
#[derive(Clone)]
#[allow(non_camel_case_types)]
pub enum dc_array_t {
    Locations(Vec<dc_location>),
    Uint(Vec<u32>),
}

impl dc_array_t {
    pub fn new(capacity: usize) -> Self {
        dc_array_t::Uint(Vec::with_capacity(capacity))
    }

    /// Constructs a new, empty `dc_array_t` holding locations with specified `capacity`.
    pub fn new_locations(capacity: usize) -> Self {
        dc_array_t::Locations(Vec::with_capacity(capacity))
    }

    pub fn into_raw(self) -> *mut Self {
        Box::into_raw(Box::new(self))
    }

    pub fn add_id(&mut self, item: uint32_t) {
        if let Self::Uint(array) = self {
            array.push(item);
        } else {
            panic!("Attempt to add id to array of other type");
        }
    }

    pub fn add_location(&mut self, location: dc_location) {
        if let Self::Locations(array) = self {
            array.push(location)
        } else {
            panic!("Attempt to add a location to array of other type");
        }
    }

    pub fn get_id(&self, index: usize) -> uint32_t {
        match self {
            Self::Locations(array) => array[index].location_id,
            Self::Uint(array) => array[index] as uint32_t,
        }
    }

    pub fn get_location(&self, index: usize) -> &dc_location {
        if let Self::Locations(array) = self {
            &array[index]
        } else {
            panic!("Not an array of locations")
        }
    }

    pub fn get_latitude(&self, index: usize) -> libc::c_double {
        self.get_location(index).latitude
    }

    pub fn get_longitude(&self, index: size_t) -> libc::c_double {
        self.get_location(index).longitude
    }

    pub fn get_accuracy(&self, index: size_t) -> libc::c_double {
        self.get_location(index).accuracy
    }

    pub fn get_timestamp(&self, index: size_t) -> i64 {
        self.get_location(index).timestamp
    }

    pub fn get_chat_id(&self, index: size_t) -> uint32_t {
        self.get_location(index).chat_id
    }

    pub fn get_contact_id(&self, index: size_t) -> uint32_t {
        self.get_location(index).contact_id
    }

    pub fn get_msg_id(&self, index: size_t) -> uint32_t {
        self.get_location(index).msg_id
    }

    pub fn is_empty(&self) -> bool {
        match self {
            Self::Locations(array) => array.is_empty(),
            Self::Uint(array) => array.is_empty(),
        }
    }

    /// Returns the number of elements in the array.
    pub fn len(&self) -> usize {
        match self {
            Self::Locations(array) => array.len(),
            Self::Uint(array) => array.len(),
        }
    }

    pub fn clear(&mut self) {
        match self {
            Self::Locations(array) => array.clear(),
            Self::Uint(array) => array.clear(),
        }
    }

    pub fn search_id(&self, needle: u32) -> Option<usize> {
        if let Self::Uint(array) = self {
            for (i, &u) in array.iter().enumerate() {
                if u == needle {
                    return Some(i);
                }
            }
            None
        } else {
            panic!("Attempt to search for id in array of other type");
        }
    }

    pub fn sort_ids(&mut self) {
        if let dc_array_t::Uint(v) = self {
            v.sort();
        } else {
            panic!("Attempt to sort array of something other than uints");
        }
    }
}

impl From<Vec<u32>> for dc_array_t {
    fn from(array: Vec<u32>) -> Self {
        dc_array_t::Uint(array)
    }
}

impl From<Vec<dc_location>> for dc_array_t {
    fn from(array: Vec<dc_location>) -> Self {
        dc_array_t::Locations(array)
    }
}

pub unsafe fn dc_array_unref(array: *mut dc_array_t) {
    assert!(!array.is_null());
    Box::from_raw(array);
}

pub unsafe fn dc_array_add_id(array: *mut dc_array_t, item: uint32_t) {
    assert!(!array.is_null());
    (*array).add_id(item);
}

pub unsafe fn dc_array_get_cnt(array: *const dc_array_t) -> size_t {
    assert!(!array.is_null());
    (*array).len()
}

pub unsafe fn dc_array_get_id(array: *const dc_array_t, index: size_t) -> uint32_t {
    assert!(!array.is_null());
    (*array).get_id(index)
}

pub unsafe fn dc_array_get_marker(array: *const dc_array_t, index: size_t) -> *mut libc::c_char {
    assert!(!array.is_null());

    if let dc_array_t::Locations(v) = &*array {
        if let Some(s) = &v[index].marker {
            s.strdup()
        } else {
            std::ptr::null_mut()
        }
    } else {
        panic!("Not an array of locations");
    }
}

/**
 * Return the independent-state of the location at the given index.
 * Independent locations do not belong to the track of the user.
 *
 * @memberof dc_array_t
 * @param array The array object.
 * @param index Index of the item. Must be between 0 and dc_array_get_cnt()-1.
 * @return 0=Location belongs to the track of the user,
 *     1=Location was reported independently.
 */
pub unsafe fn dc_array_is_independent(array: *const dc_array_t, index: size_t) -> libc::c_int {
    assert!(!array.is_null());

    if let dc_array_t::Locations(v) = &*array {
        v[index].independent as libc::c_int
    } else {
        panic!("Attempt to get location independent field from array of something other than locations");
    }
}

pub unsafe fn dc_array_search_id(
    array: *const dc_array_t,
    needle: uint32_t,
    ret_index: *mut size_t,
) -> bool {
    assert!(!array.is_null());

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

pub unsafe fn dc_array_get_raw(array: *const dc_array_t) -> *const u32 {
    assert!(!array.is_null());

    if let dc_array_t::Uint(v) = &*array {
        v.as_ptr()
    } else {
        panic!("Attempt to convert array of something other than uints to raw");
    }
}

pub fn dc_array_new(initsize: size_t) -> *mut dc_array_t {
    dc_array_t::new(initsize).into_raw()
}

#[cfg(test)]
unsafe fn dc_array_empty(array: *mut dc_array_t) {
    assert!(!array.is_null());

    (*array).clear()
}

pub unsafe fn dc_array_duplicate(array: *const dc_array_t) -> *mut dc_array_t {
    assert!(!array.is_null());

    (*array).clone().into_raw()
}

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

    #[test]
    fn test_dc_array() {
        unsafe {
            let arr = dc_array_new(7 as size_t);
            assert_eq!(dc_array_get_cnt(arr), 0);

            for i in 0..1000 {
                dc_array_add_id(arr, (i + 2) as uint32_t);
            }

            assert_eq!(dc_array_get_cnt(arr), 1000);

            for i in 0..1000 {
                assert_eq!(
                    dc_array_get_id(arr, i as size_t),
                    (i + 1i32 * 2i32) as libc::c_uint
                );
            }

            dc_array_empty(arr);

            assert_eq!(dc_array_get_cnt(arr), 0);

            dc_array_add_id(arr, 13 as uint32_t);
            dc_array_add_id(arr, 7 as uint32_t);
            dc_array_add_id(arr, 666 as uint32_t);
            dc_array_add_id(arr, 0 as uint32_t);
            dc_array_add_id(arr, 5000 as uint32_t);

            (*arr).sort_ids();

            assert_eq!(dc_array_get_id(arr, 0 as size_t), 0);
            assert_eq!(dc_array_get_id(arr, 1 as size_t), 7);
            assert_eq!(dc_array_get_id(arr, 2 as size_t), 13);
            assert_eq!(dc_array_get_id(arr, 3 as size_t), 666);

            dc_array_unref(arr);
        }
    }

    #[test]
    #[should_panic]
    fn test_dc_array_out_of_bounds() {
        let arr = dc_array_new(7);
        for i in 0..1000 {
            unsafe { dc_array_add_id(arr, (i + 2) as uint32_t) };
        }
        unsafe { dc_array_get_id(arr, 1000) };
    }
}