use serenity;
use serenity::model::channel::Message;
use serenity::prelude::*;
use serenity::voice::ffmpeg;
use serenity::voice::LockedAudio;

use serenity::client::bridge::voice::ClientVoiceManager;
use serenity::prelude::Mutex;
use std::sync::Arc;

use super::prelude::*;

use rusqlite::{params, Connection};

use utilities::prelude::*;

pub struct Song {
    pub name: String,
}

pub struct MediaData {
    playlist: Vec<Song>,
    current_song: Option<LockedAudio>,
    song_name: String,
    pub next_callback: Option<Arc<dyn Fn() -> ()>>,

    sql_data_base: Connection,

    pub voice_manager: Arc<Mutex<ClientVoiceManager>>,
}

impl MediaData {
    pub fn new(
        file: &str,
        voice_manager: Arc<Mutex<ClientVoiceManager>>,
    ) -> Result<MediaData, String> {
        let connection = match Connection::open(file) {
            Ok(file) => file,
            Err(_) => return Err(format!("can't open {}", file)),
        };

        match connection.execute(
            "CREATE TABLE IF NOT EXISTS Vulva3 (
                name            TEXT PRIMARY KEY,
                link            TEXT NOT NULL
            )",
            params![],
        ) {
            Ok(_) => (),
            Err(err) => {
                println!("{}", err);
                return Err(format!("can't create table"));
            }
        };

        Ok(MediaData {
            playlist: Vec::new(),
            current_song: None,
            song_name: String::new(),
            next_callback: None,

            sql_data_base: connection,

            voice_manager,
        })
    }

    pub fn reset(
        &mut self,
        ctx: &serenity::client::Context,
        msg: &serenity::model::channel::Message,
    ) -> Result<(), String> {
        self.playlist.clear();
        self.current_song = None;
        self.song_name = String::new();
        self.next_callback = None;

        if let Some(media) = ctx.data.read().get::<Media>() {
            let mut manager = media.voice_manager.lock();

            let guild_id = guild_id(ctx, msg)?;

            {
                let handler = match handler(guild_id, &mut manager) {
                    Some(handler) => handler,
                    None => return Ok(()),
                };

                println!("stopped handler");

                handler.stop();
            }

            manager.remove(guild_id);
        }

        Ok(())
    }

    pub fn db(&self) -> &Connection {
        &self.sql_data_base
    }

    pub fn song(&self) -> &Option<LockedAudio> {
        &self.current_song
    }

    pub fn song_mut(&mut self) -> &mut Option<LockedAudio> {
        &mut self.current_song
    }

    pub fn playlist(&self) -> &Vec<Song> {
        &self.playlist
    }

    pub fn playlist_mut(&mut self) -> &mut Vec<Song> {
        &mut self.playlist
    }

    pub fn song_name(&self) -> &String {
        &self.song_name
    }

    pub fn song_name_mut(&mut self) -> &mut String {
        &mut self.song_name
    }

    pub fn start_playing(
        ctx: &Context,
        mediadata: &mut MediaData,
        msg: &Message,
    ) -> VerboseResult<()> {
        // check if there is already playing
        let already_started = mediadata.song().is_some();

        // if there isnt already a song playing, start a new one
        if !already_started {
            Self::next_song(ctx, mediadata, msg)?;
        }

        Ok(())
    }

    pub fn next_song(ctx: &Context, mediadata: &mut MediaData, msg: &Message) -> VerboseResult<()> {
        let voice_manager = mediadata.voice_manager.clone();
        let mut manager = voice_manager.lock();

        let guild_id = guild_id(ctx, msg)?;

        let mut need_to_leave = false;

        {
            let handler = {
                match handler(guild_id, &mut manager) {
                    Some(handler) => handler,
                    None => {
                        create_error!("error getting handler");
                    }
                }
            };

            if mediadata.playlist().is_empty() {
                need_to_leave = true;
                handler.stop();
                *mediadata.song_mut() = None;
                *mediadata.song_name_mut() = String::new();
            } else {
                handler.stop();

                let first = mediadata.playlist_mut().remove(0);

                let source = match ffmpeg(first.name.clone()) {
                    Ok(mpeg) => mpeg,
                    Err(_) => {
                        mediadata.playlist_mut().clear();

                        return Ok(());
                    }
                };

                *mediadata.song_mut() = Some(handler.play_returning(source));
                *mediadata.song_name_mut() = first.name.clone();

                msg.channel_id
                    .say(&ctx.http, format!("Playing song: {}", first.name))
                    .map_err(|err| format!("{}", err))?;
            }
        }

        if need_to_leave {
            manager.remove(guild_id);
        }

        Ok(())
    }
}

unsafe impl Send for MediaData {}
unsafe impl Sync for MediaData {}

pub struct Media;

impl TypeMapKey for Media {
    type Value = MediaData;
}