using UnityEngine;
using BaseGames.Combat;

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，
    /// 武器卸下（切换）时销毁。
    ///
    /// Prefab 内部层级示例：
    ///   [WPN_SkyBlade_HitBox]
    ///   ├── [HitBox_Ground]   ← BoxCollider2D, Layer = PlayerHitBox
    ///   ├── [HitBox_Up]
    ///   ├── [HitBox_Down]
    ///   └── [HitBox_Air]
    ///
    /// 命名规范：Assets/Prefabs/Weapons/WPN_{weaponId}_HitBox.prefab
    /// </summary>
    public class WeaponHitBoxInstance : MonoBehaviour
    {
        [SerializeField] private HitBox _hitBoxGround;
        [SerializeField] private HitBox _hitBoxUp;
        [SerializeField] private HitBox _hitBoxDown;
        [SerializeField] private HitBox _hitBoxAir;

        /// <summary>下劈 HitBox 命中确认事件（供 PlayerCombat 转发给 DownAttackState pogo 逻辑）。</summary>
        public event System.Action<DamageInfo> OnDownHitConfirmed;

        private void Awake()
        {
            if (_hitBoxDown != null)
                _hitBoxDown.OnHitConfirmed += info => OnDownHitConfirmed?.Invoke(info);
        }

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

        /// <summary>激活指定方向的 HitBox。</summary>
        public void Activate(AttackDirection dir, DamageSourceSO source, Transform attacker)
            => GetHitBox(dir)?.Activate(source, attacker);

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

        /// <summary>停用所有方向的 HitBox。</summary>
        public void DeactivateAll()
        {
            _hitBoxGround?.Deactivate();
            _hitBoxUp?.Deactivate();
            _hitBoxDown?.Deactivate();
            _hitBoxAir?.Deactivate();
        }

        /// <summary>切换连击段伤害源（不改变激活状态，供 PlayerCombat.SetComboSegmentSource 调用）。</summary>
        public void SetDamageSource(AttackDirection dir, DamageSourceSO source)
            => GetHitBox(dir)?.SetDamageSource(source);

        /// <summary>按方向查询对应 HitBox 组件。</summary>
        public HitBox GetHitBox(AttackDirection dir) => dir switch
        {
            AttackDirection.Ground => _hitBoxGround,
            AttackDirection.Up     => _hitBoxUp,
            AttackDirection.Down   => _hitBoxDown,
            AttackDirection.Air    => _hitBoxAir,
            _                      => null,
        };
    }
}