use bevy::prelude::*;
use bevy::audio::PlaybackMode;

const ASSET_CLICK: &str = "sounds/click-button-140881-crop.ogg";
const ASSET_SWITCH: &str = "sounds/typosonic-typing-192811-crop.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_event::<AudioClickEvent>();
        app.add_event::<AudioSwitchEvent>();
    }
}

#[derive(Event)]
pub struct AudioClickEvent();

#[derive(Event)]
pub struct AudioSwitchEvent();

#[derive(Component)]
pub struct ComponentBGM;

#[derive(Component)]
pub struct ComponentThrusterSound;

#[derive(Resource)]
struct SoundBGM(Handle<AudioSource>);

#[derive(Resource)]
pub struct SoundClick(Handle<AudioSource>);

#[derive(Resource)]
pub struct SoundSwitch(Handle<AudioSource>);

pub fn setup(
    mut commands: Commands,
    asset_server: Res<AssetServer>,
) {
    let bgm = SoundBGM(asset_server.load("tmp/FTL - Faster Than Light (2012) OST - 12 - Void (Explore)-edQw2yYXQJM.ogg"));
    commands.spawn((
        AudioBundle {
            source: bgm.0.clone(),
            settings: PlaybackSettings::LOOP,
        },
        ComponentBGM,
    ));
    commands.insert_resource(bgm);
    commands.spawn((
        AudioBundle {
            source: asset_server.load("sounds/wakeup.ogg"),
            settings: PlaybackSettings::DESPAWN,
        },
    ));
    commands.spawn((
        ComponentThrusterSound,
        AudioBundle {
            source: asset_server.load("tmp/loopingthrust-95548.ogg"),
            settings: PlaybackSettings {
                mode: PlaybackMode::Loop,
                paused: true,
                ..default()
            },
        },
    ));
    commands.insert_resource(SoundClick(asset_server.load(ASSET_CLICK)));
    commands.insert_resource(SoundSwitch(asset_server.load(ASSET_SWITCH)));
}

pub fn toggle_bgm(
    keyboard_input: Res<ButtonInput<KeyCode>>,
    bgm_controller: Query<&AudioSink, With<ComponentBGM>>,
    mut evwriter: EventWriter<AudioClickEvent>,
) {
    if keyboard_input.just_pressed(KeyCode::KeyT) {
        if let Ok(sink) = bgm_controller.get_single() {
            sink.toggle();
            evwriter.send(AudioClickEvent());
        }
    }
}

pub fn play_sfx(
    mut commands: Commands,
    mut events_click: EventReader<AudioClickEvent>,
    mut events_switch: EventReader<AudioSwitchEvent>,
    sound_click: Res<SoundClick>,
    sound_switch: Res<SoundSwitch>,
) {
    if !events_click.is_empty() {
        events_click.clear();
        commands.spawn(AudioBundle {
            source: sound_click.0.clone(),
            settings: PlaybackSettings::DESPAWN,
        });
    }
    if !events_switch.is_empty() {
        events_switch.clear();
        commands.spawn(AudioBundle {
            source: sound_switch.0.clone(),
            settings: PlaybackSettings::DESPAWN,
        });
    }
}