//   ▄████████▄      +        ███ +  ▄█████████ ███     +
//  ███▀    ▀███ +         +  ███    ███▀  +    ███ +       +
//  ███  +   ███ ███   ███ █████████ ███        ███  ███   ███
//  ███     +███ ███   ███    ███    ███▐██████ ███  ███   ███
//  ███ +    ███ ███+  ███   +███    ███     +  ███  ███ + ███
//  ███▄    ▄███ ███▄  ███    ███ +  ███  +     ███  ███▄  ███
//   ▀████████▀ + ▀███████    ███▄   ███▄       ▀████ ▀███████
//       +                  +                +             ███
//  +   ▀████████████████████████████████████████████████████▀
//
// This module manages sound effects and music.

use bevy::prelude::*;
use bevy::audio::{PlaybackMode, Volume};
use crate::var;

const ASSET_CLICK: &str = "sounds/click-button-140881-crop.ogg";
const ASSET_SWITCH: &str = "sounds/typosonic-typing-192811-crop.ogg";
const ASSET_INCOMING_MESSAGE: &str = "sounds/connect.ogg";
const ASSET_PING: &str = "sounds/connect.ogg";
const ASSET_CONNECT: &str = "sounds/connect.ogg";
const ASSET_BGM: &str = "music/Aleksey Chistilin - Cinematic Cello.ogg";
const ASSET_THRUSTER: &str = "sounds/thruster.ogg";
const ASSET_ROCKET: &str = "sounds/rocket.ogg";
const ASSET_ION: &str = "sounds/ion.ogg";
const ASSET_WAKEUP: &str = "sounds/wakeup.ogg";
const ASSET_BIKESTART: &str = "sounds/bikestart.ogg";
const ASSET_CRASH: &str = "sounds/crash.ogg";
const ASSET_ELECTRICMOTOR: &str = "sounds/electricmotor.ogg";

pub struct AudioPlugin;
impl Plugin for AudioPlugin {
    fn build(&self, app: &mut App) {
        app.add_systems(Startup, setup);
        app.add_systems(Update, toggle_bgm);
        app.add_systems(PostUpdate, play_sfx);
        app.add_systems(PostUpdate, update_music);
        app.add_event::<PlaySfxEvent>();
        app.add_event::<ToggleMusicEvent>();
    }
}

pub enum Sfx {
    IncomingChatMessage,
    Click,
    Switch,
    Ping,
    Connect,
    EnterVehicle,
    Crash,
    WakeUp,
    None,
}

#[derive(Event)] pub struct PlaySfxEvent(pub Sfx);
#[derive(Event)] pub struct ToggleMusicEvent();
#[derive(Component)] pub struct ComponentBGM;
#[derive(Component)] pub struct ComponentThrusterSound;
#[derive(Component)] pub struct ComponentRocketSound;
#[derive(Component)] pub struct ComponentIonSound;
#[derive(Component)] pub struct ComponentElectricMotorSound;
#[derive(Component)] struct SoundBGM(Handle<AudioSource>);
#[derive(Resource)] pub struct SoundClick(Handle<AudioSource>);
#[derive(Resource)] pub struct SoundSwitch(Handle<AudioSource>);
#[derive(Resource)] pub struct SoundIncomingMessage(Handle<AudioSource>);
#[derive(Resource)] pub struct SoundPing(Handle<AudioSource>);
#[derive(Resource)] pub struct SoundConnect(Handle<AudioSource>);
#[derive(Resource)] pub struct SoundBikeStart(Handle<AudioSource>);
#[derive(Resource)] pub struct SoundCrash(Handle<AudioSource>);
#[derive(Resource)] pub struct SoundWakeUp(Handle<AudioSource>);

pub fn setup(
    mut commands: Commands,
    settings: Res<var::Settings>,
    asset_server: Res<AssetServer>,
) {
    commands.spawn((
        ComponentBGM,
        AudioBundle {
            source: SoundBGM(asset_server.load(ASSET_BGM)).0.clone(),
            settings: PlaybackSettings {
                mode: PlaybackMode::Loop,
                paused: settings.hud_active || settings.mute_music,
                ..default()
            },
        },
    ));
    commands.spawn((
        ComponentThrusterSound,
        AudioBundle {
            source: asset_server.load(ASSET_THRUSTER),
            settings: PlaybackSettings {
                mode: PlaybackMode::Loop,
                volume: Volume::new(0.0),
                paused: true,
                ..default()
            },
        },
    ));
    commands.spawn((
        ComponentRocketSound,
        AudioBundle {
            source: asset_server.load(ASSET_ROCKET),
            settings: PlaybackSettings {
                mode: PlaybackMode::Loop,
                volume: Volume::new(0.0),
                paused: true,
                ..default()
            },
        },
    ));
    commands.spawn((
        ComponentIonSound,
        AudioBundle {
            source: asset_server.load(ASSET_ION),
            settings: PlaybackSettings {
                mode: PlaybackMode::Loop,
                volume: Volume::new(0.0),
                paused: true,
                ..default()
            },
        },
    ));
    commands.spawn((
        ComponentElectricMotorSound,
        AudioBundle {
            source: asset_server.load(ASSET_ELECTRICMOTOR),
            settings: PlaybackSettings {
                mode: PlaybackMode::Loop,
                volume: Volume::new(0.5),
                paused: true,
                ..default()
            },
        },
    ));
    commands.insert_resource(SoundClick(asset_server.load(ASSET_CLICK)));
    commands.insert_resource(SoundSwitch(asset_server.load(ASSET_SWITCH)));
    commands.insert_resource(SoundIncomingMessage(asset_server.load(ASSET_INCOMING_MESSAGE)));
    commands.insert_resource(SoundPing(asset_server.load(ASSET_PING)));
    commands.insert_resource(SoundConnect(asset_server.load(ASSET_CONNECT)));
    commands.insert_resource(SoundBikeStart(asset_server.load(ASSET_BIKESTART)));
    commands.insert_resource(SoundCrash(asset_server.load(ASSET_CRASH)));
    commands.insert_resource(SoundWakeUp(asset_server.load(ASSET_WAKEUP)));
}

pub fn toggle_bgm(
    keyboard_input: Res<ButtonInput<KeyCode>>,
    mut evwriter_toggle: EventWriter<ToggleMusicEvent>,
    mut evwriter_sfx: EventWriter<PlaySfxEvent>,
    mut settings: ResMut<var::Settings>,
) {
    if keyboard_input.just_pressed(settings.key_toggle_music) {
        settings.mute_music ^= true;
        evwriter_sfx.send(PlaySfxEvent(Sfx::Click));
        evwriter_toggle.send(ToggleMusicEvent());
    }
    if keyboard_input.just_pressed(settings.key_toggle_sfx) {
        settings.mute_sfx ^= true;
        evwriter_sfx.send(PlaySfxEvent(Sfx::Click));
        evwriter_toggle.send(ToggleMusicEvent());
    }
}

pub fn play_sfx(
    mut commands: Commands,
    settings: Res<var::Settings>,
    mut events_sfx: EventReader<PlaySfxEvent>,
    sound_click: Res<SoundClick>,
    sound_switch: Res<SoundSwitch>,
    sound_incoming_message: Res<SoundIncomingMessage>,
    sound_ping: Res<SoundPing>,
    sound_connect: Res<SoundConnect>,
    sound_bikestart: Res<SoundBikeStart>,
    sound_crash: Res<SoundCrash>,
    sound_wakeup: Res<SoundWakeUp>,
) {
    if settings.mute_sfx && !events_sfx.is_empty() {
        events_sfx.clear();
    }
    for sfx in events_sfx.read() {
        match sfx.0 {
            Sfx::None => { continue; }
            _ => {}
        }
        commands.spawn(AudioBundle {
            source: match sfx.0 {
                Sfx::Switch => sound_switch.0.clone(),
                Sfx::Click => sound_click.0.clone(),
                Sfx::IncomingChatMessage => sound_incoming_message.0.clone(),
                Sfx::Ping => sound_ping.0.clone(),
                Sfx::Connect => sound_connect.0.clone(),
                Sfx::EnterVehicle => sound_bikestart.0.clone(),
                Sfx::Crash => sound_crash.0.clone(),
                Sfx::WakeUp => sound_wakeup.0.clone(),
                Sfx::None => sound_ping.0.clone(),
            },
            settings: PlaybackSettings::DESPAWN,
        });
    }
}

pub fn str2sfx(sfx_label: &str) -> Sfx {
    return match sfx_label {
        "switch" => Sfx::Switch,
        "click" => Sfx::Click,
        "chat" => Sfx::IncomingChatMessage,
        "ping" => Sfx::Ping,
        "connect" => Sfx::Connect,
        "entervehicle" => Sfx::EnterVehicle,
        "crash" => Sfx::Crash,
        _ => Sfx::None,
    };
}

pub fn update_music(
    mut events: EventReader<ToggleMusicEvent>,
    bgm_controller: Query<&AudioSink, With<ComponentBGM>>,
    settings: Res<var::Settings>,
) {
    if !events.is_empty() {
        events.clear();
        if let Ok(bgm_sink) = bgm_controller.get_single() {
            if settings.mute_music {
                bgm_sink.pause();
            }
            else {
                bgm_sink.play();
            }
        }
    }
}