use bevy::prelude::*;

use crate::{damagable::DamageableKilled, ships::Factions};

const ENEMY_REWARD: u64 = 10;

#[derive(Resource)]
pub struct Score {
    pub score: u64,
    pub max_score: u64,
}

pub struct ScorePlugin;

impl Plugin for ScorePlugin {
    fn build(&self, app: &mut App) {
        app.insert_resource(Score {
            score: 0,
            max_score: 0,
        })
        .add_observer(on_something_died);
    }
}

pub fn on_something_died(killed: On<DamageableKilled>, mut score: ResMut<Score>) {
    let Some(faction) = killed.killed_faction else {
        return;
    };

    if faction != Factions::EnemyFaction {
        return;
    }

    score.score += ENEMY_REWARD;
    if score.max_score < score.score {
        score.max_score = score.score;
    }
}