use bevy::prelude::*;
use bevy::window::{CursorGrabMode, PrimaryWindow, WindowResolution};

use super::cursor::CursorGrabState;

pub struct WindowPlugin;

impl Plugin for WindowPlugin
{
    fn build(&self, app: &mut App)
    {
        app.add_systems(PreStartup, setup_window);
        app.add_systems(OnEnter(CursorGrabState(true)), on_cursor_grab_toggled);
        app.add_systems(OnEnter(CursorGrabState(false)), on_cursor_grab_toggled);
    }
}

fn setup_window(
    mut window: Query<&mut Window, With<PrimaryWindow>>,
) {
    let mut window = window.single_mut();
    window.title = "Bevy FPS Game".to_string();
    window.resolution = WindowResolution::new(1920.0, 1080.0);
    window.position = WindowPosition::Centered(MonitorSelection::Primary);
}

fn on_cursor_grab_toggled(
    mut window: Query<&mut Window, With<PrimaryWindow>>,
    cursor_state: Res<State<CursorGrabState>>,
) {
    let mut window = window.single_mut();

    match cursor_state.get()
    {
        CursorGrabState(true) => {
            window.cursor_options.visible = false;
            window.cursor_options.grab_mode = CursorGrabMode::Locked;
        }
        CursorGrabState(false) => {
            window.cursor_options.visible = true;
            window.cursor_options.grab_mode = CursorGrabMode::None;
        }
    }
}