using UnityEngine;

public class Character : 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;


    protected bool isAllowVertical = true;
    protected bool isAllowRight=true;
    protected bool isAllowLeft= true;

    private void Start()
    {
        _body = GetComponent<Rigidbody2D>();
        _boxCollider = GetComponent<BoxCollider2D>();
    }

    protected void MoveTo(float inputHorizontal,float inputVertical)
    {
        var groundCheck = CheckBounds(Vector2.down, groundLayer);

        float v_movement=0;
        if (groundCheck || _isOnLadder)
        {
            var leftCheck = CheckBounds(Vector2.left, groundLayer);
            var rightCheck = CheckBounds(Vector2.right, groundLayer);
            if(leftCheck) { isAllowLeft = false; }
            if (rightCheck) { isAllowRight = false; }

            isAllowVertical = false;
            _isFall = false;
            float h_movement = inputHorizontal;
            if (h_movement > 0 && !_facingRight)
            {
                FlipCharacter();
            }
            if (h_movement < 0 && _facingRight)
            {
                FlipCharacter();
            }

            animator.SetBool("Walk", h_movement != 0);

            if (CheckBounds(Vector2.down, ladderLayer))
            {
                isAllowVertical = true;
                _isOnLadder = true;
                v_movement=inputVertical;

                if (v_movement > 0)
                {
                    if (!CheckBounds(Vector2.up,ladderLayer))
                    {
                        v_movement = 0;
                    }
                }
            }
            else
            {
                _isOnLadder = false;
            }
            _body.velocity = new Vector2(h_movement * MovementSpeed, v_movement * MovementSpeed);
        }
        else
        {
            _isFall = true;
        }
    }

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


    private void FixedUpdate()
    {
        if (_isOnLadder)
        {

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

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

        _facingRight = !_facingRight;
    }

   
}