use bevy::prelude::*;

use crate::player::*;

pub struct Camera;
pub fn camera_follow_player(
    player: Query<(&Transform, &Player), Without<Camera>>,
    mut camera: Query<(&mut Transform, &Camera), Without<Player>>,
    time: Res<Time>,
) {
    let player_pos = if let Some(player) = player.iter().next() {
        player.0.translation
    } else {
        return;
    };

    let ds = time.delta_seconds() * 5.0;
    // TODO Change this to normal movement
    for (mut trans, _) in camera.iter_mut() {
        trans.look_at(player_pos, Vec3::Y);

        // keep a distance to the player
        if trans.translation.distance(player_pos) > 170.0 {
            let mut d = trans.rotation * Vec3::Z * ds;
            d.y = 0.0;
            trans.translation -= d;
        }
        if trans.translation.distance(player_pos) < 130.0 {
            let mut d = trans.rotation * Vec3::Z * ds;
            d.y = 0.0;
            trans.translation += d;
        }
    }
}