using UnityEngine;

public class PlayerController : MonoBehaviour
{
    [SerializeField]
    private Animator animator;
    [SerializeField]
    private float MovementSpeed = 1.5f;
    [SerializeField]
    private LayerMask ladderLayer;
    [SerializeField]
    private LayerMask groundLayer;
    [SerializeField]
    private float distance;
    private bool _isOnLadder;
    private Rigidbody2D _body;
    private BoxCollider2D _boxCollider;
    private bool _isFall;
    private bool _facingRight = true;


    void Start()
    {
        _body = GetComponent<Rigidbody2D>();
        _boxCollider = GetComponent<BoxCollider2D>();
    }
    void Update()
    {
        float inputHorizontal = 0;
        float inputVertical = 0;

        var groundCheck = Physics2D.BoxCast(_boxCollider.bounds.center, _boxCollider.bounds.size, 0f, Vector2.down, .1f, groundLayer);

        if (groundCheck || _isOnLadder)
        {
            _isFall = false;
            inputHorizontal = Input.GetAxisRaw("Horizontal");
            if (inputHorizontal > 0 && !_facingRight)
            {
                FlipCharacter();
            }
            if (inputHorizontal < 0 && _facingRight)
            {
                FlipCharacter();
            }

            animator.SetBool("PlayerWalk", inputHorizontal != 0);

            if (IsLadder(Vector2.down))
            {
                _isOnLadder = true;
                inputVertical = Input.GetAxisRaw("Vertical");

                if (inputVertical > 0)
                {
                    if (!IsLadder(Vector2.up))
                    {
                        inputVertical = 0;
                    }
                }
            }
            else
            {
                _isOnLadder = false;
            }
            _body.velocity = new Vector2(inputHorizontal * MovementSpeed, inputVertical * MovementSpeed);
        }
        else
        {
            _isFall = true;
        }
    }

    private RaycastHit2D IsLadder(Vector2 direction)
    {
        return Physics2D.BoxCast(_boxCollider.bounds.center, _boxCollider.bounds.size, 0f, direction, .1f, ladderLayer);
    }

    private void FixedUpdate()
    {
        if (_isOnLadder)
        {

            _body.gravityScale = 0;
        }
        else
        {
            _body.gravityScale = 1;
        }
        if (_isFall)
        {
            if (IsLadder(Vector2.down))
            {
                _isOnLadder = true;
            }
            _body.velocity = new Vector2(0, _body.velocity.y);
            animator.SetBool("PlayerWalk", false);
        }
    }

    private void FlipCharacter()
    {
        Vector3 currentScale = gameObject.transform.localScale;
        currentScale.x *= -1;
        gameObject.transform.localScale = currentScale;

        _facingRight = !_facingRight;
    }
}