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

public partial class PlayerMovement : CharacterBody2D, IDestructible
{
	[Export]
	public int Speed { get; set; } = 400;
	
	[Export]
	public int StrafeSpeed { get; set; } = 200;

	public int MovementSpeed => _isStrafing ? StrafeSpeed : Speed;

	[Export]
	public float CrosshairDistance { get; set; } = 10f;

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

	[Export]
	public string GameOverScene { get; set; }

	private Node2D _selector;

	private Interactable _lastInteractable;

	[Export]
	public Marker2D Muzzle { get; set; }

	private AnimatedSprite2D _animatedSprite;

	private Vector2 _movementDirection { get; set; }

	private Vector2 _facingDirection { get; set; }
	
	private Vector2 _rightStickInput { get; set; }

	private Sprite2D _crosshair;

	[Export] public float MaxHealth = 32f;
	
	[Export] public Weapon EquippedWeapon;
	
	private float _currentHealth = 0f;
	
	private bool _isDestroyed = false;

	private GameManager _gameManager;
	
	[Export] public Sprite2D HitboxSprite { get; set; } 
	
	private bool _isStrafing { get; set; }
	
	[Signal]
	public delegate void HealthChangedEventHandler(float newHealth, float MaxHealth);

	public float CurrentHealth
	{
		get => _currentHealth;
		set
		{
			if (_currentHealth != value)
			{
				_currentHealth = value;
				EmitSignal(nameof(HealthChanged), _currentHealth, MaxHealth);
			}
		}
	}
	
	//private InventoryManager _inventoryManager;

	public override void _Ready()
	{
		CurrentHealth = MaxHealth;

		_animatedSprite = GetNode<AnimatedSprite2D>("./Smoothing2D/AnimatedSprite2D");
		_crosshair = GetNode<Sprite2D>("./Smoothing2D/Crosshair");
		//_inventoryManager = GetNode<InventoryManager>("/root/GameScene/InventoryManager");

		_movementDirection = Vector2.Zero;
		_facingDirection = Vector2.Zero;
		_rightStickInput = Vector2.Zero;
		_isStrafing = false;
		
		_gameManager = GetNode<GameManager>("/root/GameScene");

		if (SelectorScene != null)
		{
			_selector = this.CreateChild<Node2D>(SelectorScene);
			_selector.Visible = false;
		}
	}

	/*public override _Process(float _delta)
	{
		if (Input.IsActionPressed("ui_right"))
		{
			_animatedSprite.Play("run");
		}
		else
		{
			_animatedSprite.Stop();
		}
	}*/

	public override void _Process(double delta)
	{
		HandleShoot();
		SetAnimation();

		FindInteractable();
	}

	private void FindInteractable()
	{
		if (Input.IsActionJustPressed("Use") && _lastInteractable != null)
		{
			_lastInteractable.Activate();
		}

		//var spaceState = GetWorld2D().DirectSpaceState;

		//var query = PhysicsRayQueryParameters2D.Create(Vector2.Zero, )
	}

	private void HandleShoot()
	{
		if (EquippedWeapon == null) return;
		if (!Input.IsActionPressed("shoot")) return;

		EquippedWeapon.ShootDirection = this._facingDirection;
		EquippedWeapon.Shoot();
		
		// //Debug.WriteLine("Shoot");
		// var bullet = BulletScene.Instantiate<Bullet>();
		// Owner.AddChild(bullet);
		// bullet.Transform = Muzzle.GlobalTransform;
		// bullet.Position = this.Position;
		// bullet.SetDirection(this._facingDirection);
	}

	private void SetAnimation()
	{

		if (Velocity.X == 0 && Velocity.Y == 0)
		{
			_animatedSprite.SpeedScale = 0;
		}
		else
		{
			_animatedSprite.SpeedScale = 1;
		}

		if (Velocity.X > 0)
		{
			_animatedSprite.Play("walk_right");
		}
		else if (Velocity.X < 0)
		{
			_animatedSprite.Play("walk_left");
		}
		else if (Velocity.Y > 0)
		{
			_animatedSprite.Play("walk_down");
		}
		else if (Velocity.Y < 0)
		{
			_animatedSprite.Play("walk_up");
		}


	}

	public Vector2 GetInput()
	{
		return Input.GetVector("left", "right", "up", "down");
	}
	
	private Vector2 GetRightStickInput()
	{
		return new Vector2(
			Input.GetAxis("aim_left","aim_right"), 
			Input.GetAxis("aim_up", "aim_down")
		);
	}

	private Vector2 CalculateCrosshairPosition()
	{

		return _facingDirection * CrosshairDistance;// + this.Position;

		//var angle = Mathf.Atan2(this.Position.X, this.Position.Y);


		//var cPos = new Vector2(this.Position.X + CrosshairDistance * Godot.Mathf.Cos(angle), this.Position.Y + CrosshairDistance * Godot.Mathf.Sin(angle));


	}

	// public override void _Draw()
	// {
	// 	if (_isStrafing)
	// 	{
	// 		HitboxSprite.Visible = true;
	// 	}
	// 	else
	// 	{
	// 		HitboxSprite.Visible = false;
	// 	}
	// 	base._Draw();
	// }

	public override void _PhysicsProcess(double delta)
	{
		_movementDirection = GetInput();
		
		_isStrafing = Input.IsActionPressed("strafe");
		// Toggle visibility of the hitbox sprite based on strafing
		if (HitboxSprite != null)
		{
			HitboxSprite.Visible = _isStrafing;
		}
		
		_rightStickInput = GetRightStickInput();
		
		// Update Facing Direction
		if (!_isStrafing)
		{
			if (_rightStickInput.Length() > 0.1f) // If the right stick is moved
			{
				_facingDirection = _rightStickInput.Normalized();
			}
			else if (_movementDirection != Vector2.Zero) // Fall back to movement direction
			{
				_facingDirection = _movementDirection;
			}
		}
		
		// if (_movementDirection != Vector2.Zero)
		// {
		// 	_facingDirection = _movementDirection;
		// }
		Velocity = _movementDirection * (float)( MovementSpeed * delta);

		MoveAndSlide();

		_crosshair.Position = CalculateCrosshairPosition();

		//FindInteractable();

	}
	
	private void _on_interaction_controller_area_entered(Area2D area)
	{
		// Replace with function body.
		if (area.IsInGroup("Interactable") && area is Interactable interactable)
		{
			Debug.WriteLine("Interactable Entered");

			if (_selector != null)
			{
				_selector.Position = interactable.Position;
				_selector.Visible = true;
				_lastInteractable = interactable;
			}
		}
	}

	private void Explode()
	{
		Debug.WriteLine("Ded");
		//CreateParticles();
		//CreateDebris();
		if (GameOverScene != null)
		{
			GetTree().ChangeSceneToFile(GameOverScene);
		}
		else
		{
			QueueFree();
		}
	}

	public void Hit(float damage)
	{
		GD.Print($"Player damaged for {damage}");
		if (_isDestroyed) return;

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

	public bool IsDestroyed()
	{
		return _isDestroyed;
	}

	private void _on_damage_hit_box_area_entered(Area2D area)
	{
		if (area is Bullet bullet)
		{
			GD.Print("Received damage manually");
			this.Hit(bullet.Damage);
			bullet.QueueFree();
		}
	}

}