use bevy::prelude::*;

use collider::Collider;
use event::Collided;

mod collider;
mod event;

pub struct CollisionPlugin;

impl Plugin for CollisionPlugin {
    fn build(&self, app: &mut App) {
        app.add_systems(Update, detect_collision_system);
    }
}

fn detect_collision_system(mut commands: Commands, query: Query<(Entity, &Transform, &Collider)>) {
    for (first_entity, first_transform, first_collider) in query {
        for (second_entity, second_transform, second_collider) in query {
            if first_entity == second_entity {
                continue;
            }

            if first_collider.detect_collision(
                first_transform.translation.truncate(), 
                &second_collider, 
                second_transform.translation.truncate()
                ){
                commands.trigger(
                    Collided {
                        entity:first_entity,
                        with:second_entity
                    });
            }
        }
    }
}