using Sandbox;

public interface IGameOverEvents : ISceneEvent<IGameOverEvents>
{
	void OnGameOver(int wavesSurvived) { }
}

public sealed class GameOverMonitor : Component, IPlayerHealthEvent, IBaseHealthEvents
{
	TimeSince gameLength;

	protected override void OnEnabled()
	{
		base.OnEnabled();

		gameLength = 0;
	}

	void IPlayerHealthEvent.OnPostDeath( GameObject player )
	{
		var alivePlayer = Scene.GetComponentInChildren<PlayerController>();
		if ( alivePlayer is null ) GameOver();
	}

	void IBaseHealthEvents.OnHealthChanged( float currentHealth )
	{
		if ( currentHealth <= 0 ) GameOver();
	}

	void GameOver()
	{
		Scene.TimeScale = 0;

		var waves = Scene.Get<EnemySpawner>().WaveCounter - 1;

		GetComponentInChildren<GameOverScreen>( true ).Waves = waves;

		foreach (var child in GameObject.Children)
		{
			child.Enabled = true;
		}

		// notify
		IGameOverEvents.Post( x => x.OnGameOver( waves ) );
	}
}