using System.Collections;
using UnityEngine;
using UnityEngine.InputSystem;

public class PlayerAttack : MonoBehaviour
{
    [SerializeField] private Vector2 normalAttackBoxSize = new Vector2(2, 1);
    [SerializeField] private Vector2 dashAttackBoxSize = new Vector2(2, 1);
    [SerializeField] private float dashAttackDistance = 5f;
    [SerializeField] private float attackOffset = 1.0f;
    [SerializeField] private LayerMask enemyLayer;
    [SerializeField] private float dashSpeed = 15f;

    private float normalAttackAngle = 0f;
    private Vector2 dashAttackDirection = Vector2.zero;
    private Vector2 attackOrigin;

    public bool isDashing { get; private set; } = false;
    private Camera cam;
    private Rigidbody2D rb;

    private void Start()
    {
        cam = Camera.main;
        rb = GetComponent<Rigidbody2D>();
    }
    
    private void Update()
    {
        if(!isDashing)
            SetAttackAngle();
    }
    
    private void OnAttack(InputValue value)
    {
        if (!value.isPressed || isDashing) return;
        
        if (Mouse.current.leftButton.isPressed)
        {
            Debug.Log("일반공격");
            NormalAttack();
        }
        
        if (Mouse.current.rightButton.isPressed)
        {
            Debug.Log("대쉬공격");
            StartCoroutine(DashAttackRoutine());
        }
    }

    private void SetAttackAngle()
    {
        Vector2 mousePositionVector = cam.ScreenToWorldPoint(Mouse.current.position.value);
        Vector2 direction = (mousePositionVector - (Vector2)transform.position).normalized;
        
        normalAttackAngle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
        dashAttackDirection = direction;
        attackOrigin = (Vector2)transform.position + (direction * attackOffset);
    }
    
    private void NormalAttack()
    {
        Collider2D[] enemies = Physics2D.OverlapBoxAll(attackOrigin, normalAttackBoxSize, normalAttackAngle, enemyLayer);
        foreach (Collider2D target in enemies)
        {
            Debug.Log("일반공격 적중: " + target.name);
        }
    }

    private IEnumerator DashAttackRoutine()
    {
        isDashing = true;
        rb.linearVelocity = Vector2.zero;
        
        float dashDuration = dashAttackDistance / dashSpeed;
        float elapsedTime = 0f;

        rb.linearVelocity = dashAttackDirection * dashSpeed;
        Debug.Log(dashAttackDirection);
        
        float originGravity = rb.gravityScale;
        
        rb.gravityScale = 0;
        while (elapsedTime < dashDuration)
        {
            Vector2 currentOrigin = (Vector2)transform.position + (dashAttackDirection * attackOffset);
            
            RaycastHit2D[] enemies = Physics2D.BoxCastAll(currentOrigin, dashAttackBoxSize, normalAttackAngle, dashAttackDirection, 0f, enemyLayer);
            
            foreach (RaycastHit2D target in enemies)
            {
                Debug.Log("대쉬 공격 적중: " + target.collider.name);
                Destroy(target.collider.gameObject);
            }

            elapsedTime += Time.deltaTime;
            yield return null;
        }
        rb.linearVelocity = Vector2.zero;
        isDashing = false;
        rb.gravityScale = originGravity;
    }
    
    private void OnDrawGizmos()
    {
        Vector2 drawStartPos = Application.isPlaying ? attackOrigin : (Vector2)transform.position + (Vector2.right * attackOffset);

        Gizmos.color = new Color(1, 0, 0, 0.5f);
        Gizmos.matrix = Matrix4x4.TRS(drawStartPos, Quaternion.Euler(0, 0, normalAttackAngle), Vector3.one);
        Gizmos.DrawCube(Vector3.zero, normalAttackBoxSize);
    }
}