public class AchievementWatcher : GameObjectSystem, ICheatEvents, IBulletEnemyEvents, IGameOverEvents, IPlayerReplicatorEvents
{
	public bool Enabled { get; set; } = true;

	public AchievementWatcher(Scene scene) : base( scene )
	{ }

	void ICheatEvents.CheatsEnabled()
	{
		Enabled = false;
		Log.Warning( "Turning off achievements and stat tracking" );
	}

	void IBulletEnemyEvents.OnDeath( GameObject enemy )
	{
		if ( !Enabled ) return;

		// increase statistics
		Sandbox.Services.Stats.Increment( "bullet-enemies-killed", 1 );
	}

	void IGameOverEvents.OnGameOver( int wavesSurvived )
	{
		if ( !Enabled ) return;

		// report statistics
		Sandbox.Services.Stats.SetValue( "waves-survived", wavesSurvived );
	}

	void IPlayerReplicatorEvents.PlayersReplicated( int newNumberOfPlayers )
	{
		if ( !Enabled ) return;

		if ( newNumberOfPlayers == 2 ) Sandbox.Services.Achievements.Unlock( "replicate" );
		if ( newNumberOfPlayers == 4 ) Sandbox.Services.Achievements.Unlock( "replicate_4" );
	}
}