use bevy::{app::{App, Update}, ecs::{event::EventWriter, system::Res}, input::{keyboard::KeyCode, ButtonInput}};

use crate::ecs::ThrustEvent;

pub fn key_input_plugin(app: &mut App) {
    app.add_systems(Update, directional_keys);
}

pub fn directional_keys(
    keys: Res<ButtonInput<KeyCode>>,
    mut thrust_event: EventWriter<ThrustEvent>,
) {
    if keys.just_pressed(KeyCode::KeyW) || keys.just_pressed(KeyCode::ArrowUp) {
        thrust_event.write(ThrustEvent::Up(true));
    } else if keys.just_released(KeyCode::KeyW) || keys.just_released(KeyCode::ArrowUp) {
        thrust_event.write(ThrustEvent::Up(false));
    }

    if keys.just_pressed(KeyCode::KeyS) || keys.just_pressed(KeyCode::ArrowDown) {
        thrust_event.write(ThrustEvent::Down(true));
    } else if keys.just_released(KeyCode::KeyS) || keys.just_released(KeyCode::ArrowDown) {
        thrust_event.write(ThrustEvent::Down(false));
    }

    if keys.just_pressed(KeyCode::KeyA) || keys.just_pressed(KeyCode::ArrowLeft) {
        thrust_event.write(ThrustEvent::Left(true));
    } else if keys.just_released(KeyCode::KeyA) || keys.just_released(KeyCode::ArrowLeft) {
        thrust_event.write(ThrustEvent::Left(false));
    }

    if keys.just_pressed(KeyCode::KeyD) || keys.just_pressed(KeyCode::ArrowRight) {
        thrust_event.write(ThrustEvent::Right(true));
    } else if keys.just_released(KeyCode::KeyD) || keys.just_released(KeyCode::ArrowRight) {
        thrust_event.write(ThrustEvent::Right(false));
    }
}