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

namespace BaseGames.World
{
    /// <summary>
    /// 假墙（秘密通道）。外观与普通墙相同，可通过攻击/接近揭示并穿越。
    /// 揭示后禁用碰撞体（不销毁），状态通过 WorldStateRegistry 持久化。
    /// WorldStateRegistrySaver（ISaveable）统一负责将 Door 分类写入存档。
    /// </summary>
    [RequireComponent(typeof(Collider2D))]
    public class FalseWall : MonoBehaviour, IDamageable
    {
        public enum RevealCondition { Proximity, AttackOnce, AlwaysOpen }

        [Header("识别")]
        [SerializeField] private string          _wallId;

        [Header("揭示条件")]
        [SerializeField] private RevealCondition _revealCondition  = RevealCondition.AttackOnce;
        [SerializeField] private float           _proximityRadius  = 2.0f;

        [Header("组件引用")]
        [SerializeField] private Collider2D      _wallCollider;
        [SerializeField] private SpriteRenderer  _renderer;
        [SerializeField] private SceneFeedback    _revealFeedback;

        [Header("World State")]
        [Tooltip("绑定场景唯一的 WorldStateRegistry ScriptableObject，用于持久化揭示状态。")]
        [SerializeField] private WorldStateRegistry _registry;

        private bool _isRevealed;

        // ── IDamageable ───────────────────────────────────────────────────────
        public bool IsAlive      => true;
        public bool IsInvincible => _isRevealed;
        public int  Defense      => 0;

        public void TakeDamage(DamageInfo info)
        {
            if (_isRevealed || _revealCondition != RevealCondition.AttackOnce) return;
            Reveal();
        }

        // ── Unity Lifecycle ───────────────────────────────────────────────────

        private void Start()
        {
            if (_revealCondition == RevealCondition.AlwaysOpen)
            {
                SetPassThroughImmediate();
                _isRevealed = true;
                return;
            }

            // 从 WorldStateRegistry 恢复揭示状态（注册表由 WorldStateRegistrySaver.OnLoad 填充）
            if (!string.IsNullOrEmpty(_wallId) && (_registry?.IsDoorOpened(_wallId) ?? false))
            {
                _isRevealed = true;
                SetPassThroughImmediate();
            }
        }

        private void OnTriggerEnter2D(Collider2D other)
        {
            if (_isRevealed || _revealCondition != RevealCondition.Proximity) return;
            if (!other.CompareTag("Player")) return;
            // Proximity 模式：仅播放 Shimmer 暗示，碰撞仍启用
            _revealFeedback?.Play();
        }

        // ── Implementation ────────────────────────────────────────────────────

        private void Reveal()
        {
            _isRevealed = true;
            _registry?.MarkDoorOpened(_wallId);
            _revealFeedback?.Play();
            SetPassThroughImmediate();
        }

        private void SetPassThroughImmediate()
        {
            if (_wallCollider != null)
                _wallCollider.enabled = false;
            // 切换 Sprite 到透明/揭示帧（由子类或动画处理）
        }

#if UNITY_EDITOR
        private void OnDrawGizmosSelected()
        {
            Gizmos.color = new Color(0.6f, 0.2f, 1f, 0.8f);
            var col = GetComponent<Collider2D>();
            if (col != null)
                Gizmos.DrawWireCube(transform.position, col.bounds.size);

            if (_revealCondition == RevealCondition.Proximity)
            {
                Gizmos.color = new Color(0.6f, 0.2f, 1f, 0.2f);
                Gizmos.DrawWireSphere(transform.position, _proximityRadius);
            }
        }
#endif
    }
}