zeling_v2/Assets/_Game/Scripts/World/Map/MapManager.cs

using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using BaseGames.Core;
using BaseGames.Core.Events;
using BaseGames.Core.Save;

namespace BaseGames.World.Map
{
    /// <summary>
    /// 运行时地图管理器（架构 15_MapShopModule §1.2）。
    /// 挂在 Persistent 场景 [GameManagers] 下，通过事件驱动记录已探索/已完整地图的房间。
    /// 实现 ISaveable 持久化探索进度。
    /// </summary>
    [DefaultExecutionOrder(-700)]
    public class MapManager : MonoBehaviour, ISaveable, IMapService
    {
        [SerializeField] private MapDatabaseSO _database;

        [Header("Event Channels")]
        [SerializeField] private StringEventChannelSO _onRoomEntered;   // 订阅 EVT_RoomEntered
        [SerializeField] private StringEventChannelSO _onMapUpdated;    // 发布：房间发现时
        [SerializeField] private StringEventChannelSO _onRegionChanged; // 发布：玩家首次进入新区域时（EVT_RegionChanged）

        // 三级可见性：
        //   Unknown  → 未进入过（默认）
        //   Explored → 进入过（显示轮廓/格子）
        //   Mapped   → 完整地图信息（购买 MapFragment 或存档点揭示）
        private HashSet<string> _exploredRooms = new();
        private HashSet<string> _mappedRooms   = new();
        private string          _currentRegionId;
        private int             _totalRoomCount = -1;  // -1 = 未缓存；OnLoad 后重置
        private readonly CompositeDisposable _subs = new();

        private void Awake()
        {
            if (ServiceLocator.GetOrDefault<IMapService>() != null) { Destroy(gameObject); return; }
            ServiceLocator.Register<IMapService>(this);
        }

        private void OnEnable()
        {
            _onRoomEntered?.Subscribe(OnRoomEntered).AddTo(_subs);
            ServiceLocator.GetOrDefault<ISaveableRegistry>()?.Register(this);
        }

        private void OnDisable()
        {
            _subs.Clear();
            ServiceLocator.GetOrDefault<ISaveableRegistry>()?.Unregister(this);
        }

        // ── ISaveable ─────────────────────────────────────────────────────────

        public void OnSave(SaveData data)
        {
            data.Map.ExploredRooms = new HashSet<string>(_exploredRooms);
            data.Map.MappedRooms   = new HashSet<string>(_mappedRooms);
        }

        public void OnLoad(SaveData data)
        {
            _exploredRooms  = data.Map.ExploredRooms != null ? new HashSet<string>(data.Map.ExploredRooms) : new HashSet<string>();
            _mappedRooms    = data.Map.MappedRooms   != null ? new HashSet<string>(data.Map.MappedRooms)   : new HashSet<string>();
            _totalRoomCount = -1;  // 强制下次调用 GetExplorationProgress 时重新计数
        }

        // ── 事件驱动房间发现 ──────────────────────────────────────────────────

        private void OnRoomEntered(string roomId)
        {
            bool changed = _exploredRooms.Add(roomId);
            if (changed) _onMapUpdated?.Raise(roomId);

            // 区域变化检测：RegionId 非空且与上一次不同时广播 EVT_RegionChanged
            var regionId = _database?.GetRoom(roomId)?.RegionId;
            if (!string.IsNullOrEmpty(regionId) && regionId != _currentRegionId)
            {
                _currentRegionId = regionId;
                _onRegionChanged?.Raise(regionId);
            }
        }

        /// <summary>
        /// 标记为已获取地图碎片信息（购买 MapFragment SO 触发）。
        /// 仅写入 _mappedRooms；若玩家尚未亲自踏入该房间则显示为灰色轮廓（Mapped），
        /// 亲自踏入后（Explored）优先级更高，显示为白色。
        /// </summary>
        public void SetMapped(string roomId)
        {
            if (_mappedRooms.Add(roomId))
                _onMapUpdated?.Raise(roomId);
        }

        // ── 查询 API ──────────────────────────────────────────────────────────

        public bool IsExplored(string roomId)   => _exploredRooms.Contains(roomId);
        public bool IsMapped(string roomId)     => _mappedRooms.Contains(roomId);
        public string CurrentRegionId           => _currentRegionId;
        public MapDatabaseSO Database           => _database;
        public int ExploredRoomCount            => _exploredRooms.Count;

        public float GetExplorationProgress()
        {
            if (_database?.AllRooms == null || _database.AllRooms.Length == 0) return 0f;
            if (_totalRoomCount < 0)
                _totalRoomCount = _database.AllRooms.Count(r => r != null);
            return _totalRoomCount > 0 ? Mathf.Clamp01((float)_exploredRooms.Count / _totalRoomCount) : 0f;
        }

        public MapRoomDataSO[] GetRoomsByRegion(string regionId)
        {
            if (string.IsNullOrEmpty(regionId) || _database?.AllRooms == null)
                return System.Array.Empty<MapRoomDataSO>();
            return _database.AllRooms.Where(r => r != null && r.RegionId == regionId).ToArray();
        }

        private void OnDestroy()
        {
            ServiceLocator.Unregister<IMapService>(this);
        }
    }
}