using UnityEngine;
using BaseGames.Combat;
using BaseGames.Feedback;

namespace BaseGames.Player
{
    /// <summary>
    /// 武器 HitBox 实例。
    /// 由 WeaponManager 在切换武器时实例化到角色的 [WeaponSocket] 子节点下。
    ///
    /// Prefab 层级示例（每段连击独立一个子节点，在 Prefab 内可视化编辑 Collider2D）：
    ///   [WPN_SkyBlade_HitBox]          ← WeaponHitBoxInstance
    ///   ├── [HitBox_Ground]  Id=""     ← 方向默认（ComboStepConfig.hitBoxId 为空时使用）
    ///   ├── [HitBox_Ground_1] Id="g1" ← 第 1 段专属判定
    ///   ├── [HitBox_Ground_2] Id="g2" ← 第 2 段专属判定
    ///   ├── [HitBox_Up]      Id=""    ← 上劈默认
    ///   ├── [HitBox_Down]    Id=""    ← 下劈默认
    ///   └── [HitBox_Air]     Id=""    ← 空中默认
    ///
    /// ComboStepConfig.hitBoxId 留空 → 用方向默认；填 Id → 精确激活对应子节点。
    /// </summary>
    public class WeaponHitBoxInstance : MonoBehaviour
    {
        [Header("方向默认 HitBox（hitBoxId 为空时使用）")]
        [SerializeField] private HitBox _hitBoxGround;
        [SerializeField] private HitBox _hitBoxUp;
        [SerializeField] private HitBox _hitBoxDown;
        [SerializeField] private HitBox _hitBoxAir;

        private HitBox[]        _allHitBoxes;
        private AttackDirection _activeDir;
        private IFeedbackPlayer _feedback;

        /// <summary>下劈命中确认事件（供 DownAttackState Pogo 逻辑）。</summary>
        public event System.Action<DamageInfo> OnDownHitConfirmed;

        /// <summary>任意 HitBox 命中确认事件（供 PlayerCombat 订阅通用命中反馈）。</summary>
        public event System.Action<DamageInfo> OnHitConfirmed;

        private void Awake()
        {
            _allHitBoxes = GetComponentsInChildren<HitBox>(true);
            foreach (var hb in _allHitBoxes)
                hb.OnHitConfirmed += OnAnyHitConfirmed;
            _feedback = GetComponentInChildren<IFeedbackPlayer>() ?? NullFeedbackPlayer.Instance;
        }

        private void OnAnyHitConfirmed(DamageInfo info)
        {
            var weight = info.FinalDamage <= 5  ? HitWeight.Light
                       : info.FinalDamage <= 15 ? HitWeight.Medium
                       : HitWeight.Heavy;
            _feedback.PlayHit(weight);

            OnHitConfirmed?.Invoke(info);
            if (_activeDir == AttackDirection.Down)
                OnDownHitConfirmed?.Invoke(info);
        }

        // ── 公共 API ──────────────────────────────────────────────────────────

        /// <summary>
        /// 激活 HitBox。
        /// hitBoxId 非空时按 Id 精确查找 Prefab 子节点；空 = 使用该方向的默认 HitBox。
        /// </summary>
        public void Activate(AttackDirection dir, DamageSourceSO source, Transform attacker,
                             string hitBoxId = "")
        {
            _activeDir = dir;
            _feedback.PlayAttackWhoosh();
            var hitBox = string.IsNullOrEmpty(hitBoxId)
                ? GetHitBox(dir)
                : (GetHitBoxById(hitBoxId) ?? GetHitBox(dir));
            hitBox?.Activate(source, attacker);
        }

        /// <summary>停用指定方向的默认 HitBox。</summary>
        public void Deactivate(AttackDirection dir) => GetHitBox(dir)?.Deactivate();

        /// <summary>停用 Prefab 中所有 HitBox。</summary>
        public void DeactivateAll()
        {
            if (_allHitBoxes == null) return;
            foreach (var hb in _allHitBoxes) hb.Deactivate();
        }

        /// <summary>按 HitBox.Id 查找子节点（未找到返回 null）。</summary>
        public HitBox GetHitBoxById(string id)
        {
            if (_allHitBoxes == null || string.IsNullOrEmpty(id)) return null;
            foreach (var hb in _allHitBoxes)
                if (hb.Id == id) return hb;
            return null;
        }

        /// <summary>按攻击方向返回默认 HitBox。</summary>
        public HitBox GetHitBox(AttackDirection dir) => dir switch
        {
            AttackDirection.Ground => _hitBoxGround,
            AttackDirection.Up     => _hitBoxUp,
            AttackDirection.Down   => _hitBoxDown,
            AttackDirection.Air    => _hitBoxAir,
            _                      => null,
        };
    }
}