using Cirno.Scripts;
using Godot;
using System;
using System.Diagnostics;

public partial class Enemy : Area2D, IDestructible
{
	private InteractionController _cachedPlayer;
	private EnemyState _currentState = EnemyState.Idle;

	[Export]
	public PackedScene BulletScene { get; set; }

	[Export] public float Health = 4f;

	[Export] public double RateOfFire = 0.4f; // Time between shots within a burst

	[Export] public float BulletSpeed = 100f;

	[Export] public int BurstCount = 3; // Number of shots per burst

	[Export] public float BurstCooldown = 1f; // Time between bursts

	[Export] public bool AimAtPlayer = true; // Whether to aim at player or shoot straight

	private float _currentHealth = 0f;

	private bool _isDestroyed = false;

	private Timer _burstTimer;
	private Timer _shotTimer;

	private int _shotsFired = 0;

	public override void _Ready()
	{
		_currentHealth = Health;

		// Initialize timers
		_burstTimer = new Timer();
		_shotTimer = new Timer();
		
		AddChild(_burstTimer);
		AddChild(_shotTimer);

		_burstTimer.WaitTime = BurstCooldown;
		_burstTimer.OneShot = true;

		_shotTimer.WaitTime = RateOfFire;
		_shotTimer.OneShot = true;

		_shotTimer.Timeout += OnShotTimerTimeout;
		_burstTimer.Timeout += OnBurstTimerTimeout;

		

		// Debug
		DebugStats.Instance.AddProperty(this, "_currentHealth", "");
	}

	public override void _Process(double delta)
	{
		switch (_currentState)
		{
			case EnemyState.Idle:
				break;
			case EnemyState.Primed:
				break;
			default:
				break;
		}
	}

	public override void _PhysicsProcess(double delta)
	{
		HandlePlayerDetection();
	}

	private void HandlePlayerDetection()
	{
		if (_cachedPlayer == null || _currentState is not EnemyState.Primed)
		{
			return;
		}

		if (_burstTimer.IsStopped() && !_shotTimer.IsStopped() && IsPlayerInSight())
		{
			StartBurst();
		}
	}

	private void StartBurst()
	{
		_shotsFired = 0;
		_shotTimer.Start();
	}

	private void OnShotTimerTimeout()
	{
		if (_shotsFired < BurstCount)
		{
			Shoot();
			_shotsFired++;
			if (_shotsFired < BurstCount)
			{
				_shotTimer.Start(); // Restart for the next shot in the burst
			}
		}
		else
		{
			_burstTimer.Start(); // Start cooldown between bursts
		}
	}

	private void OnBurstTimerTimeout()
	{
		// Cooldown complete, can start new burst when conditions are met
	}

	private void Shoot()
	{
		var bullet = this.CreateChild<Bullet>(BulletScene);
		
		if (AimAtPlayer)
		{
			bullet.SetDirection((_cachedPlayer.GlobalPosition - this.GlobalPosition).Normalized());
		}
		else
		{
			bullet.SetDirection(Vector2.Right.Rotated(this.Rotation));
		}

		bullet.Speed = BulletSpeed;
	}

	private bool IsPlayerInSight()
	{
		var spaceState = GetWorld2D().DirectSpaceState;
		var query = PhysicsRayQueryParameters2D.Create(this.GlobalPosition, _cachedPlayer.GlobalPosition, CollisionMask, new Godot.Collections.Array<Rid> { GetRid() });
		var result = spaceState.IntersectRay(query);

		return result.Count == 0; // True if no obstacles between enemy and player
	}

	private void _on_player_detection_area_entered(Area2D area)
	{
		if (area is InteractionController player)
		{
			Debug.WriteLine("Enemy detection area Entered by interaction controller");

			_cachedPlayer = player;
			if (_currentState is EnemyState.Idle)
			{
				_currentState = EnemyState.Primed;
			}
		}
	}

	private void _on_player_detection_area_exited(Area2D area)
	{
		if (_currentState is EnemyState.Primed)
		{
			_currentState = EnemyState.Idle;
		}
	}

	private void _on_area_entered(Area2D area)
	{
		// Collision handling
	}

	private void Explode()
	{
		Debug.WriteLine("Ded");
		QueueFree();
	}

	public void Hit(float damage)
	{
		if (_isDestroyed) return;

		_currentHealth -= damage;
		if (!(_currentHealth <= 0)) return;
		_isDestroyed = true;
		Explode();
	}

	public bool IsDestroyed()
	{
		return _isDestroyed;
	}

	private enum EnemyState
	{
		Idle,
		Primed
	}
}