using System.Diagnostics;
using Godot;

namespace Babushka.scripts.CSharp.Common.CharacterControls;

public partial class Player3D : CharacterBody3D
{
    [Export] private float _speed = 1.0f;
    [Export] private Camera3D _camera;
    
    /// <summary>
    /// The sprite arrays are all setup like this:
    /// 0 - idle
    /// 1 - walking
    /// </summary>
    [Export] private AnimatedSprite3D[] _frontSpritesAnimated;
    [Export] private AnimatedSprite3D[] _sideSpritesAnimated;
    [Export] private AnimatedSprite3D[] _backSpritesAnimated;
    
    private bool _sideFlipped;
    private Vector2 _lastDirection;

    public override void _PhysicsProcess(double delta)
    {
	    var inputDir = Input.GetVector("move_left", "move_right", "move_down", "move_up");
	    if (inputDir == Vector2.Zero)
	    {
			if(_lastDirection != Vector2.Zero)
				SwitchIdleSprites();
		    return; 
	    }
	    
	    MoveOnInput(inputDir, delta);
	    SwitchMovementSprites(inputDir);
    }

    private void MoveOnInput(Vector2 inputDir, double delta)
    {
	    var direction = (Transform.Basis * new Vector3(inputDir.X, 0, inputDir.Y * (-1))).Normalized();
	    if (direction != Vector3.Zero)
		    Velocity = new Vector3(direction.X * _speed * (float) delta * Scale.X, Velocity.Y, direction.Z * _speed * (float) delta * Scale.Z);
	    else
		    Velocity = Velocity.MoveToward(new Vector3(0, 0, 0),  _speed);

	    MoveAndSlide();
    }

    private void SwitchIdleSprites()
    {
	    if (_lastDirection.X != 0)
	    {
		    ActivateSprite(0, false, true, false);
		    return;
	    }

	    if(_lastDirection.Y <= 0.0f)
		    ActivateSprite(0, true, false, false);

	    if(_lastDirection.Y > 0.0f)
		    ActivateSprite(0, false, false, true);
	    
	    _lastDirection = Vector2.Zero;
    }

    private void SwitchMovementSprites(Vector2 inputDir)
    {
	    float X = inputDir.X;
	    float Y = inputDir.Y;

	    _lastDirection = new Vector2(X, Y);
	    
	    if (X != 0)
	    {
		    ActivateSprite(1, false, true, false);
		    
		    if (X > 0.0f)
		    {
			    _sideFlipped = false;
		    }

		    if (X < 0.0f)
		    {
			    _sideFlipped = true;
		    }
		    
		    foreach (var animatedSprite in _sideSpritesAnimated)
		    {
			    animatedSprite.FlipH = _sideFlipped;
		    }
		    return;
	    }

	    if (Y != 0)
	    {
		    if (Y > 0.0f)
		    {
			    ActivateSprite(1, false, false, true);
		    }

		    if (Y < 0.0f)
		    {
			    ActivateSprite(1, true, false, false);
		    }
	    }
    }

    private void ActivateSprite(int index, bool frontActive, bool sideActive, bool backActive)
    {
	    DeactivateAll();
	    _frontSpritesAnimated[index].Visible = frontActive;
	    _sideSpritesAnimated[index].Visible = sideActive;
	    _backSpritesAnimated[index].Visible = backActive;
    }

    private void DeactivateAll()
    {
	    foreach (var animatedSprite in _frontSpritesAnimated)
	    {
		    animatedSprite.Visible = false;
	    }
	    
	    foreach (var animatedSprite in _sideSpritesAnimated)
	    {
		    animatedSprite.Visible = false;
	    }
	    
	    foreach (var animatedSprite in _backSpritesAnimated)
	    {
		    animatedSprite.Visible = false;
	    }
    }
    
}