using System.Collections;
using Animancer;
using BaseGames.Combat;
using UnityEngine;

namespace BaseGames.Enemies.Abilities
{
    /// <summary>
    /// 近战攻击带后摇脆弱窗口能力：攻击动画期间按时间比例激活 HitBox，
    /// 攻击完成后开放 HurtBox（脆弱窗口），窗口结束后恢复正常。
    /// 可复用于任何"攻击后有反击窗口"的敌人技能。
    /// </summary>
    public class MeleeVulnerabilityAbility : EnemyAbilityBase
    {
        [Header("动画")]
        [SerializeField] private ClipTransition _attackClip;

        [Header("碰撞")]
        [SerializeField] private HitBox  _hitBox;
        [SerializeField] private HurtBox _hurtBox;

        [Header("打击时间（0~1 归一化，基于 Clip 时长）")]
        [SerializeField, Range(0f, 1f)] private float _hitEnterT = 0.30f;
        [SerializeField, Range(0f, 1f)] private float _hitExitT  = 0.60f;

        [Header("后摇脆弱窗口")]
        [Tooltip("HurtBox 激活时间（秒）")]
        [SerializeField] private float _staggerDuration = 1.0f;

        protected override IEnumerator ExecuteCoroutine()
        {
            Phase = AbilityRunState.Active;
            if (_attackClip.Clip == null) yield break;

            float len    = _attackClip.Clip.length;
            float t      = 0f;
            bool  active = false;

            var dmgSrc = _config?.attackSequence?.Length > 0 ? _config.attackSequence[0].damageSource : null;

            _animancer.Play(_attackClip);

            while (t < len)
            {
                t += Time.deltaTime;

                if (!active && t >= len * _hitEnterT)
                {
                    _hitBox?.Activate(dmgSrc, _transform);
                    active = true;
                }
                if (active && t >= len * _hitExitT)
                {
                    _hitBox?.Deactivate();
                    active = false;
                }

                yield return null;
            }

            if (active)
                _hitBox?.Deactivate();

            // 后摇脆弱窗口
            if (_hurtBox != null)
                _hurtBox.enabled = true;

            yield return EnemyAbilityWaits.Get(_staggerDuration);

            if (_hurtBox != null)
                _hurtBox.enabled = false;
        }

        protected override void OnInterrupted(InterruptReason reason)
        {
            _hitBox?.Deactivate();
            if (_hurtBox != null)
                _hurtBox.enabled = false;
        }
    }
}