using UnityEngine;
using BaseGames.Combat;

namespace BaseGames.Player
{
    /// <summary>
    /// 玩家战斗组件。
    /// HitBox 随装备武器动态实例化到 [WeaponSocket] 子节点，通过 WeaponManager.ActiveHitBoxInstance 访问。
    /// </summary>
    public class PlayerCombat : MonoBehaviour
    {
        [SerializeField] private WeaponManager _weaponManager;

        private PlayerStats          _stats;
        private PlayerMovement        _movement;
        private WeaponHitBoxInstance _currentHitBoxInstance;

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

        private void Awake()
        {
            _stats    = GetComponentInParent<PlayerStats>();
            _movement = GetComponentInParent<PlayerMovement>();
        }

        private void OnEnable()
        {
            if (_weaponManager != null)
                _weaponManager.OnWeaponChanged += HandleWeaponChanged;
        }

        private void OnDisable()
        {
            if (_weaponManager != null)
                _weaponManager.OnWeaponChanged -= HandleWeaponChanged;
            UnsubscribeDownHit();
        }

        private void HandleWeaponChanged(WeaponSO _)
        {
            UnsubscribeDownHit();
            _currentHitBoxInstance = _weaponManager.ActiveHitBoxInstance;
            if (_currentHitBoxInstance != null)
                _currentHitBoxInstance.OnDownHitConfirmed += HandleDownHitConfirmed;
        }

        private void UnsubscribeDownHit()
        {
            if (_currentHitBoxInstance == null) return;
            _currentHitBoxInstance.OnDownHitConfirmed -= HandleDownHitConfirmed;
            _currentHitBoxInstance = null;
        }

        private void HandleDownHitConfirmed(DamageInfo info) => OnDownHitConfirmed?.Invoke(info);

        // ── HitBox 激活（由 State / AnimationEvent 调用）─────────────────────
        /// <summary>
        /// 激活 HitBox。
        /// hitBoxId 非空时按 Id 精确激活 Prefab 中对应子节点；空 = 方向默认。
        /// source 为 null 时回退到 WeaponSO.GetSourceByDir(dir)（方向第 0 段）。
        /// </summary>
        public void EnableWeaponHitBox(AttackDirection dir,
                                        string hitBoxId = "", DamageSourceSO source = null)
        {
            source ??= _weaponManager?.ActiveWeapon?.GetSourceByDir(dir);
            _weaponManager?.ActiveHitBoxInstance?.Activate(dir, source, transform, hitBoxId);
        }

        public void DisableWeaponHitBox(AttackDirection dir)
            => _weaponManager?.ActiveHitBoxInstance?.Deactivate(dir);

        public void DisableAllWeaponHitBoxes()
            => _weaponManager?.ActiveHitBoxInstance?.DeactivateAll();

        /// <summary>命中确认回调：增加灵力（由 HurtBox.ReceiveDamage 步骤 7 的 HitConfirmed 事件订阅）。</summary>
        public void OnHitConfirmed(DamageInfo info)
        {
            int gain = _weaponManager?.ActiveWeapon?.soulPowerGain ?? 10;
            _stats?.AddSoulPower(gain);

            // 攻击命中反嵈：向攻击反方向施加微小后退冲量，增强打击感
            if (_movement?.Rb != null && info.KnockbackDirection.x != 0f)
                _movement.Rb.AddForce(
                    new UnityEngine.Vector2(UnityEngine.Mathf.Sign(-info.KnockbackDirection.x) * 2f, 0f),
                    UnityEngine.ForceMode2D.Impulse);
        }
    }
}