use crate::config::planet::Planet;
use crate::server::part::SpawnPartRequest;
use crate::server::world_config::WorldConfigResource;
use bevy::app::App;
use bevy::prelude::*;
use bevy::prelude::{Commands, Query, Res, Transform};
use bevy::time::Time;

#[derive(Resource, Default)]
struct PartTimerRes {
    timer: Timer,
}

pub fn spawn_parts_plugin(app: &mut App) {
    app.init_resource::<PartTimerRes>()
        .add_systems(Update, spawn_parts_on_earth);
}

fn spawn_parts_on_earth(
    mut commands: Commands,
    world_config: Res<WorldConfigResource>,
    planets: Query<(&Transform, &Planet)>,
    mut timer: ResMut<PartTimerRes>,
    asset_server: Res<AssetServer>,
    time: Res<Time>,
) {
    let Some(wc) = &world_config.config else {
        return;
    };
    timer.timer.tick(time.delta());

    if !timer.timer.just_finished() {
        return;
    }
    timer.timer = Timer::from_seconds(wc.world.spawn_parts_interval_secs, TimerMode::Once);

    // find earth
    let Some((spawn_planet_pos, spawn_planet)) =
        planets.iter().find(|p| p.1.name == wc.hearty.spawn_at)
    else {
        return;
    };
    let angle = rand::random::<f32>() * std::f32::consts::TAU;
    let offset = spawn_planet.radius + 150.0;
    let mut new_transform = Transform::from_xyz(angle.cos() * offset, angle.sin() * offset, 0.0);
    new_transform.rotate_z(angle);
    new_transform.translation += spawn_planet_pos.translation;

    commands
        .spawn(SpawnPartRequest(
            asset_server.load("config/parts/chassis.part.toml"),
        ))
        .insert(new_transform);
}