/*
 * This file is part of laurelin/client
 * Copyright (C) 2023 Jonni Liljamo <jonni@liljamo.com>
 *
 * Licensed under GPL-3.0-only.
 * See LICENSE for licensing information.
 */

use bevy::{
    app::AppExit,
    prelude::*,
    window::{
        CompositeAlphaMode, Cursor, PresentMode, WindowLevel, WindowMode, WindowResizeConstraints,
        WindowResolution,
    },
};
use bevy_egui::EguiPlugin;
use naia_bevy_client::{
    Client, ClientConfig as NaiaClientConfig, Plugin as NaiaClientPlugin, ReceiveEvents,
};

use laurelin_shared::server::protocol::protocol;

mod cfg;
mod constants;
mod plugins;
mod runtime;
mod util;

#[cfg(feature = "dev")]
mod dev;

// NOTE: lua things, currently not in use
//use bevy_mod_scripting::prelude::*;
//mod lua;

/// Used to control the state of the game
#[derive(Debug, Clone, Eq, PartialEq, Hash, Default, States)]
pub enum GameState {
    #[default]
    Splash,
    Loading,
    MainMenu,
    Game,
}

#[derive(SystemSet, Debug, Hash, PartialEq, Eq, Clone)]
struct MainLoop;

#[derive(SystemSet, Debug, Hash, PartialEq, Eq, Clone)]
struct AfterMainLoop;

fn main() {
    let mut app = App::new();

    app.add_plugins(DefaultPlugins.set(WindowPlugin {
        primary_window: Some(Window {
            cursor: Cursor::default(),
            present_mode: PresentMode::Fifo,
            mode: WindowMode::Windowed,
            position: WindowPosition::Centered(MonitorSelection::Primary),
            resolution: WindowResolution::new(1280., 720.),
            title: "Laurelin".to_string(),
            composite_alpha_mode: CompositeAlphaMode::Auto,
            resize_constraints: WindowResizeConstraints {
                min_width: 1280.,
                min_height: 720.,
                max_width: 3840.,
                max_height: 2160.,
            },
            resizable: false,
            decorations: true,
            transparent: false,
            focused: true,
            window_level: WindowLevel::Normal,
            canvas: None,
            fit_canvas_to_parent: false,
            prevent_default_event_handling: false,
            ime_enabled: false,
            ..Default::default()
        }),
        ..Default::default()
    }));

    app.configure_set(MainLoop.after(ReceiveEvents))
        .configure_set(AfterMainLoop.after(MainLoop));

    #[cfg(feature = "dev")]
    app.add_plugin(dev::DevPlugin);
    if !app.is_plugin_added::<EguiPlugin>() {
        app.add_plugin(EguiPlugin);
    }

    //app.add_plugin(ScriptingPlugin).add_plugin(lua::LuaPlugin);

    app.insert_resource(cfg::CfgDirs(
        directories::ProjectDirs::from("com", "liljamo", "deckbuilder")
            .expect("failed to get project directories"),
    ));

    app.insert_resource(cfg::CfgSettings::default())
        .register_type::<cfg::CfgSettings>()
        .insert_resource(cfg::CfgUser::default())
        .register_type::<cfg::CfgUser>()
        .insert_resource(cfg::CfgDev::default())
        .register_type::<cfg::CfgDev>();

    app.add_startup_system(setup).add_state::<GameState>();

    app.add_plugin(plugins::config::ConfigPlugin)
        .add_plugin(plugins::phases::splash::SplashPlugin)
        .add_plugin(plugins::phases::loading::LoadingPlugin)
        .add_plugin(plugins::menu::MenuPlugin);

    // Lastly, add in runtime data structs
    //app.insert_resource(runtime::menu::RTDMenu::default())
    //    .insert_resource(runtime::game::RTDGame::default());

    // Networking
    app.add_plugin(NaiaClientPlugin::new(
        NaiaClientConfig::default(),
        protocol(),
    ))
    .add_plugin(plugins::networking::NetworkingPlugin);

    // Graceful exit
    app.add_event::<GracefulExit>()
        .add_system(handle_graceful_exit.in_set(AfterMainLoop));

    app.run();
}

fn setup(mut commands: Commands) {
    // Spawn a camera
    commands.spawn(Camera3dBundle::default());
}

/// Utility function do despawn an entity and all its children
pub fn despawn_screen<T: Component>(to_despawn: Query<Entity, With<T>>, mut commands: Commands) {
    for entity in &to_despawn {
        commands.entity(entity).despawn_recursive();
    }
}

pub struct GracefulExit;

/// Graceful exit, disconnects client cleanly before closing
pub fn handle_graceful_exit(
    mut ev: EventReader<GracefulExit>,
    mut app_exit_events: EventWriter<AppExit>,
    mut client: Client,
) {
    for _ in ev.iter() {
        if client.is_connected() {
            client.disconnect();
        }

        app_exit_events.send(AppExit);
    }
}