use bevy::ecs::world::World;
use bglga::persistence;
use bglga::resources::{HighScore, Score};
use bglga::systems::check_high_score;

// ── check_high_score system ──

#[test]
fn check_high_score_updates_when_score_exceeds() {
    let save_path = std::env::temp_dir().join("bglga_test_integration.json");
    let mut world = World::default();
    world.insert_resource(Score { value: 7000 });
    world.insert_resource(HighScore { value: 5000 });
    persistence::set_save_path_override(save_path.clone());
    world.register_system(check_high_score);
    world
        .run_system_cached(check_high_score)
        .expect("system should run");
    let hs = world.resource::<HighScore>();
    assert_eq!(hs.value, 7000);
    // Assert file was persisted to disk
    let content = std::fs::read_to_string(&save_path).expect("high score file should exist");
    assert!(
        content.contains("7000"),
        "persisted file should contain score 7000: {content}"
    );
    std::fs::remove_file(&save_path).ok();
}

#[test]
fn check_high_score_does_not_update_when_score_equal() {
    let mut world = bevy::ecs::world::World::default();
    world.insert_resource(Score { value: 75 });
    world.insert_resource(HighScore { value: 75 });
    world.register_system(check_high_score);
    world
        .run_system_cached(check_high_score)
        .expect("system should run");
    let high_score = world.resource::<HighScore>();
    assert_eq!(
        high_score.value, 75,
        "HighScore should remain unchanged when score equals high score"
    );
}

#[test]
fn check_high_score_does_not_update_when_score_lower() {
    let mut world = bevy::ecs::world::World::default();
    world.insert_resource(Score { value: 30 });
    world.insert_resource(HighScore { value: 99 });
    world.register_system(check_high_score);
    world
        .run_system_cached(check_high_score)
        .expect("system should run");
    let high_score = world.resource::<HighScore>();
    assert_eq!(
        high_score.value, 99,
        "HighScore should remain unchanged when score is lower"
    );
}