using System;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.InputSystem;

public class Player : MonoBehaviour
{
    private Camera _camera;
    private Rigidbody2D _rigidbody2D;

    private int currentHp;
    private int maxHp;

    private int maxJumpCount = 2;
    private int currentJumpCount = 2;

    private float moveX;

    private bool isGrounded;
    private bool isDashing;

    private Coroutine jumpCutRoutine;
    private List<GameObject> dashHitEnemies = new List<GameObject>();

    [SerializeField] private float moveSpeed = 9f;
    [SerializeField] private float jumpSpeed = 18.2f;
    [SerializeField] private float jumpCutMultiplier = 0.3f;

    [SerializeField] private Vector2 attackBoxSize = new Vector2(1f, 1f);
    [SerializeField] private LayerMask enemyLayer;
    [SerializeField] private float dashTime = 0.5f;
    [SerializeField] private float dashDistance = 5f;

    private Rigidbody2D _rigidbody;


    private void Start()
    {
        _rigidbody = gameObject.GetComponent<Rigidbody2D>();
        _camera = Camera.main;
    }

    public void Jump()
    {
        if (currentJumpCount > 0)
        {
            currentJumpCount--;
            _rigidbody.linearVelocity = new Vector2(_rigidbody.linearVelocity.x, 0);
            _rigidbody.AddForce(Vector2.up * jumpSpeed, ForceMode2D.Impulse);
        }
    }

    public void MoveUpdate()
    {
        if (!isDashing)
        {
            _rigidbody.linearVelocity = new Vector2(moveX * moveSpeed, _rigidbody.linearVelocity.y);
        }
    }

    public void SetXVector(InputValue value)
    {
        moveX = value.Get<Vector2>().x;
    }

    public void NormalAttack()
    {
        float angle = GetMouseAngle();
        Vector2 direction = new Vector2(Mathf.Cos(angle * Mathf.Deg2Rad), Mathf.Sin(angle * Mathf.Deg2Rad));
        Vector2 originPosition = (Vector2)transform.position + (direction * 1);
        Collider2D[] enemise = Physics2D.OverlapBoxAll(originPosition, attackBoxSize, angle, enemyLayer);
        Debug.Log(angle);
        if (enemise.Length > 0)
        {
            foreach (Collider2D enemy in enemise)
            {
                Debug.Log(enemy.name);
                enemy.gameObject.GetComponent<Entity>().TakeDamage(10);
            }
            if (angle > -110 && angle < -70)
            {
                _rigidbody.linearVelocity = new Vector2(-_rigidbody.linearVelocity.x, 20f);

            }
        }
    }

    private void CutJumpVelocity()
    {
        if (_rigidbody.linearVelocity.y > 0)
        {
            _rigidbody.linearVelocity = new Vector2(_rigidbody.linearVelocity.x, _rigidbody.linearVelocity.y * jumpCutMultiplier);
        }
    }

    private IEnumerator DelayedJumpCut(float delay)
    {
        yield return new WaitForSeconds(delay);
        CutJumpVelocity();
    }

    public void CheckGround()
    {
        isGrounded = Physics2D.Raycast(transform.position, Vector2.down, 1.25f, LayerMask.GetMask("Ground"));
        if (isGrounded) { currentJumpCount = maxJumpCount; }
    }

    private float GetMouseAngle()
    {
        Vector2 tempVect = _camera.ScreenToWorldPoint(Mouse.current.position.ReadValue()) - transform.position; 
        return Mathf.Atan2(tempVect.y, tempVect.x) * Mathf.Rad2Deg;
    }

    public void DashAttack()
    {
        if (isDashing) return;
        StartCoroutine(DashPlayerRoutine());
    }

    private IEnumerator DashPlayerRoutine()
    {
        isDashing = true;
        _rigidbody.linearVelocity = Vector2.zero;
        dashHitEnemies.Clear();

        Vector2 mousePos = _camera.ScreenToWorldPoint(Mouse.current.position.ReadValue());
        Vector2 direction = (mousePos - (Vector2)transform.position).normalized;

        if (isGrounded && mousePos.y < transform.position.y)
        {
            direction = new Vector2(Mathf.Sign(direction.x), 0);
        }

        Vector2 startPos = _rigidbody.position;
        Vector2 targetPos = startPos + (direction * dashDistance);

        float dashTimer = 0f;
        while (dashTimer < dashTime)
        {
            dashTimer += Time.deltaTime;
            float t = dashTimer / dashTime;

            _rigidbody.MovePosition(Vector2.Lerp(startPos, targetPos, t));

            yield return null;
        }
        isDashing = false;
    }

    public void AttackOnDash(Collider2D collision)
    {
        if ((enemyLayer.value & (1 << collision.gameObject.layer)) > 0)
        {
            if (!dashHitEnemies.Contains(collision.gameObject))
            {
                dashHitEnemies.Add(collision.gameObject);
                Debug.Log(collision.gameObject.name + " 대쉬 피격");
                collision.gameObject.GetComponent<Entity>().TakeDamage(10);
            }
        }
    }

    public bool IsDashing() { return isDashing; }

    public void Heal(int heal)
    {
        if (heal < 0) { return; }

        currentHp += heal;
        if (currentHp > maxHp)
        {
            currentHp = maxHp;
        }
    }

    public void TakeDamage(int playerAttackDamage)
    {
        currentHp -= playerAttackDamage;
        if (currentHp <= 0)
        {
            currentHp = 0;
            Destroy(gameObject);
        }
    }
}