using System.Threading;
using Unity.VisualScripting;
using UnityEngine;

// ============================================================================
// HazardSkill
// ----------------------------------------------------------------------------
// 보스 특별 스킬의 한 종류 (BossSkill 상속). 스킬 프리팹의 루트에 부착.
//
// 시퀀스: 자체 애니메이션 재생 → 선딜 → 피해 판정 ON → 유지 → OFF → 후딜 → 자동 파괴
//
// 콜라이더의 "움직임"은 이 프리팹의 자체 Animator/클립이 담당한다 (보스와 무관).
// 이 스크립트는 타이밍에 맞춰 HazardHitbox들의 피해 판정만 ON/OFF 한다.
// ============================================================================
public class HazardSkill : BossSkill
{
    [Header("HazardSkill")]
    [SerializeField] private Animator _animator;             // 이 프리팹의 Animator (콜라이더 이동 담당)
    [SerializeField] private string _downAnimationState = "HazardSkillDown";
    [SerializeField] private string _rightAnimationState = "HazardSkillRight";
    [SerializeField] private float _windup = 0.5f;           // 애니 시작 ~ 피해 판정 ON
    [SerializeField] private float _activeDuration = 1.5f;   // 피해 판정 유지 시간
    [SerializeField] private float _recovery = 0.6f;         // 판정 OFF 후 후딜
    [SerializeField] private GameObject _hazardHitboxOrigin;
    [SerializeField] private int _hitBoxDamage = 15;

    private SkillSupport support;

    private void Awake()
    {
        if (_animator == null)
            _animator = GetComponentInChildren<Animator>();
    }

    private void Start()
    {
        support = Object.FindFirstObjectByType<SkillSupport>();
    }

    protected override async Awaitable RunSkill(CancellationToken token)
    {
        try
        {
            int dirChoice = Random.Range(0,2); //0,1

            if(dirChoice == 0) // Down 포격
            {
                if (_animator != null && !string.IsNullOrEmpty(_downAnimationState))
                _animator.Play(_downAnimationState);
            }
            else if(dirChoice == 1) //Right 포격
            {
                if (_animator != null && !string.IsNullOrEmpty(_rightAnimationState))
                _animator.Play(_rightAnimationState);
            }

            PredictHazards(dirChoice);

            // 선딜
            await Awaitable.WaitForSecondsAsync(_windup, token);

            FireHazards(dirChoice);

            // 후딜
            await Awaitable.WaitForSecondsAsync(_recovery, token);
        }
        finally
        {
            
        }
    }

    private void PredictHazards(int dirChoice)
    {
        SkillPredict[] predicts = dirChoice switch { 0 => support.DownHazardPredicts, 1=> support.RightHazardPredicts, _=> null};

        for (int i = 0; i < predicts.Length; i++)
        {
            if(predicts[i] != null)
                predicts[i].PredictVFX.Play();
        }
    }

    private void FireHazards(int dirChoice)
    {
        Transform[] hazardPoss = dirChoice switch { 0 => support.DownHazardFirePos, 1=> support.RightHazardFirePos, _=> null};
        Vector2 attackDir = dirChoice switch {0 => Vector2.down,1=>Vector2.right,_=>Vector2.left};

        if (hazardPoss == null) return;

        for (int i = 0; i < hazardPoss.Length; i++)
        {
            GameObject hitbox = Instantiate(_hazardHitboxOrigin,hazardPoss[i].transform);
            HazardHitbox hazardHitbox = hitbox.GetComponent<HazardHitbox>();
            if(hazardHitbox != null)
            {
                hazardHitbox.Damage = _hitBoxDamage;
            }

            Rigidbody2D hitbox_rb = hitbox.GetComponent<Rigidbody2D>();
            if(hitbox_rb != null)
            {
                hitbox_rb.AddForce(attackDir*100.0f);
            }

            Destroy(hitbox,5f);
        }
    }
}