use bevy::prelude::*;

use crate::{Brick, GameState, WORLD_SIZE};

pub struct DebugPlugin;

impl Plugin for DebugPlugin {
    fn build(&self, app: &mut App) {
        if !cfg!(feature = "debug") {
            return;
        }

        app.add_systems(
            Update,
            (
                draw_world_bounds,
                log_state_transitions.run_if(state_changed::<GameState>),
                cheat_codes,
            ),
        );
    }
}

fn draw_world_bounds(mut gizmos: Gizmos) {
    gizmos.rect_2d(
        Isometry2d::from_translation(WORLD_SIZE / 2.),
        WORLD_SIZE,
        LinearRgba::RED,
    );
}

fn log_state_transitions(state: Res<State<GameState>>) {
    info!({ ?state }, "State changed");
}

fn cheat_codes(
    mut commands: Commands,
    input: Res<ButtonInput<KeyCode>>,
    bricks: Query<Entity, With<Brick>>,
) {
    if input.pressed(KeyCode::Digit1) {
        let mut iter = bricks.iter();
        _ = iter.next();

        for entity in iter {
            commands.entity(entity).despawn();
        }
    }
}