using System;
using System.Collections.Generic;
using System.Threading;
using Cysharp.Threading.Tasks;
using YooAsset;

namespace TEngine
{
    /// <summary>
    /// 实体管理器。
    /// </summary>
    internal sealed partial class EntityManager : Module, IEntityManager, IUpdateModule
    {
        private readonly Dictionary<int, EntityInfo> _entityInfos;
        private readonly Dictionary<string, EntityGroup> _entityGroups;
        private readonly Dictionary<int, int> _entitiesBeingLoaded;
        private readonly HashSet<int> _entitiesToReleaseOnLoad;
        private readonly Queue<EntityInfo> _recycleQueue;
        private IObjectPoolModule _objectPoolModule;
        private IResourceModule _resourceModule;
        private IEntityHelper _entityHelper;
        private int _serial;
        private bool _isShutdown;
        private Action<Type, IEntity, float, object> _showEntitySuccessEventHandler;
        private Action<int, Type, string, string, string, object> _showEntityFailureEventHandler;
        private Action<int, string, string, object> _hideEntityCompleteEventHandler;

        /// <summary>
        /// 初始化实体管理器的新实例。
        /// </summary>
        public EntityManager()
        {
            _entityInfos = new Dictionary<int, EntityInfo>();
            _entityGroups = new Dictionary<string, EntityGroup>(StringComparer.Ordinal);
            _entitiesBeingLoaded = new Dictionary<int, int>();
            _entitiesToReleaseOnLoad = new HashSet<int>();
            _recycleQueue = new Queue<EntityInfo>();
            _objectPoolModule = null;
            _resourceModule = null;
            _entityHelper = null;
            _serial = 0;
            _isShutdown = false;
            _showEntitySuccessEventHandler = null;
            _showEntityFailureEventHandler = null;
            _hideEntityCompleteEventHandler = null;
        }

        /// <summary>
        /// 获取实体数量。
        /// </summary>
        public int EntityCount => _entityInfos.Count;

        /// <summary>
        /// 获取实体组数量。
        /// </summary>
        public int EntityGroupCount => _entityGroups.Count;

        /// <summary>
        /// 显示实体成功事件。
        /// </summary>
        public event Action<Type, IEntity, float, object> ShowEntitySuccess
        {
            add => _showEntitySuccessEventHandler += value;
            remove => _showEntitySuccessEventHandler -= value;
        }

        /// <summary>
        /// 显示实体失败事件。
        /// </summary>
        public event Action<int, Type, string, string, string, object> ShowEntityFailure
        {
            add => _showEntityFailureEventHandler += value;
            remove => _showEntityFailureEventHandler -= value;
        }

        /// <summary>
        /// 隐藏实体完成事件。
        /// </summary>
        public event Action<int, string, string, object> HideEntityComplete
        {
            add => _hideEntityCompleteEventHandler += value;
            remove => _hideEntityCompleteEventHandler -= value;
        }

        /// <summary>
        /// 实体管理器轮询。
        /// </summary>
        /// <param name="elapseSeconds">逻辑流逝时间，以秒为单位。</param>
        /// <param name="realElapseSeconds">真实流逝时间，以秒为单位。</param>
        public void Update(float elapseSeconds, float realElapseSeconds)
        {
            while (_recycleQueue.Count > 0)
            {
                EntityInfo entityInfo = _recycleQueue.Dequeue();
                IEntity entity = entityInfo.Entity;
                EntityGroup entityGroup = (EntityGroup)entity.EntityGroup;
                if (entityGroup == null)
                {
                    throw new GameFrameworkException("Entity group is invalid.");
                }

                entityInfo.Status = EntityStatus.WillRecycle;
                entity.OnRecycle();
                entityInfo.Status = EntityStatus.Recycled;
                entityGroup.UnspawnEntity(entity);
                MemoryPool.Release(entityInfo);
            }

            foreach (KeyValuePair<string, EntityGroup> entityGroup in _entityGroups)
            {
                entityGroup.Value.Update(elapseSeconds, realElapseSeconds);
            }
        }

        public override void OnInit()
        {
            
        }

        /// <summary>
        /// 关闭并清理实体管理器。
        /// </summary>
        public override void Shutdown()
        {
            _isShutdown = true;
            HideAllLoadedEntities();
            _entityGroups.Clear();
            _entitiesBeingLoaded.Clear();
            _entitiesToReleaseOnLoad.Clear();
            _recycleQueue.Clear();
        }

        /// <summary>
        /// 设置对象池管理器。
        /// </summary>
        /// <param name="objectPoolManager">对象池管理器。</param>
        public void SetObjectPoolManager(IObjectPoolModule objectPoolManager)
        {
            _objectPoolModule = objectPoolManager ?? throw new GameFrameworkException("Object pool manager is invalid.");
        }

        /// <summary>
        /// 设置资源管理器。
        /// </summary>
        /// <param name="resourceManager">资源管理器。</param>
        public void SetResourceManager(IResourceModule resourceManager)
        {
            _resourceModule = resourceManager ?? throw new GameFrameworkException("Resource manager is invalid.");
        }

        /// <summary>
        /// 设置实体辅助器。
        /// </summary>
        /// <param name="entityHelper">实体辅助器。</param>
        public void SetEntityHelper(IEntityHelper entityHelper)
        {
            _entityHelper = entityHelper ?? throw new GameFrameworkException("Entity helper is invalid.");
        }

        /// <summary>
        /// 是否存在实体组。
        /// </summary>
        /// <param name="entityGroupName">实体组名称。</param>
        /// <returns>是否存在实体组。</returns>
        public bool HasEntityGroup(string entityGroupName)
        {
            if (string.IsNullOrEmpty(entityGroupName))
            {
                throw new GameFrameworkException("Entity group name is invalid.");
            }

            return _entityGroups.ContainsKey(entityGroupName);
        }

        /// <summary>
        /// 获取实体组。
        /// </summary>
        /// <param name="entityGroupName">实体组名称。</param>
        /// <returns>要获取的实体组。</returns>
        public IEntityGroup GetEntityGroup(string entityGroupName)
        {
            if (string.IsNullOrEmpty(entityGroupName))
            {
                throw new GameFrameworkException("Entity group name is invalid.");
            }

            if (_entityGroups.TryGetValue(entityGroupName, out var entityGroup))
            {
                return entityGroup;
            }

            return null;
        }

        /// <summary>
        /// 获取所有实体组。
        /// </summary>
        /// <returns>所有实体组。</returns>
        public IEntityGroup[] GetAllEntityGroups()
        {
            int index = 0;
            IEntityGroup[] results = new IEntityGroup[_entityGroups.Count];
            foreach (KeyValuePair<string, EntityGroup> entityGroup in _entityGroups)
            {
                results[index++] = entityGroup.Value;
            }

            return results;
        }

        /// <summary>
        /// 获取所有实体组。
        /// </summary>
        /// <param name="results">所有实体组。</param>
        public void GetAllEntityGroups(List<IEntityGroup> results)
        {
            if (results == null)
            {
                throw new GameFrameworkException("Results is invalid.");
            }

            results.Clear();
            foreach (KeyValuePair<string, EntityGroup> entityGroup in _entityGroups)
            {
                results.Add(entityGroup.Value);
            }
        }

        /// <summary>
        /// 增加实体组。
        /// </summary>
        /// <param name="entityGroupName">实体组名称。</param>
        /// <param name="instanceAutoReleaseInterval">实体实例对象池自动释放可释放对象的间隔秒数。</param>
        /// <param name="instanceCapacity">实体实例对象池容量。</param>
        /// <param name="instanceExpireTime">实体实例对象池对象过期秒数。</param>
        /// <param name="instancePriority">实体实例对象池的优先级。</param>
        /// <param name="entityGroupHelper">实体组辅助器。</param>
        /// <returns>是否增加实体组成功。</returns>
        public bool AddEntityGroup(string entityGroupName, float instanceAutoReleaseInterval, int instanceCapacity, float instanceExpireTime, int instancePriority, IEntityGroupHelper entityGroupHelper)
        {
            if (string.IsNullOrEmpty(entityGroupName))
            {
                throw new GameFrameworkException("Entity group name is invalid.");
            }

            if (entityGroupHelper == null)
            {
                throw new GameFrameworkException("Entity group helper is invalid.");
            }

            if (_objectPoolModule == null)
            {
                throw new GameFrameworkException("You must set object pool manager first.");
            }

            if (HasEntityGroup(entityGroupName))
            {
                return false;
            }

            _entityGroups.Add(entityGroupName, new EntityGroup(entityGroupName, instanceAutoReleaseInterval, instanceCapacity, instanceExpireTime, instancePriority, entityGroupHelper, _objectPoolModule));

            return true;
        }

        /// <summary>
        /// 是否存在实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <returns>是否存在实体。</returns>
        public bool HasEntity(int entityId)
        {
            return _entityInfos.ContainsKey(entityId);
        }

        /// <summary>
        /// 是否存在实体。
        /// </summary>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <returns>是否存在实体。</returns>
        public bool HasEntity(string entityAssetName)
        {
            if (string.IsNullOrEmpty(entityAssetName))
            {
                throw new GameFrameworkException("Entity asset name is invalid.");
            }

            foreach (KeyValuePair<int, EntityInfo> entityInfo in _entityInfos)
            {
                if (entityInfo.Value.Entity.EntityAssetName == entityAssetName)
                {
                    return true;
                }
            }

            return false;
        }

        /// <summary>
        /// 获取实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <returns>要获取的实体。</returns>
        public IEntity GetEntity(int entityId)
        {
            EntityInfo entityInfo = GetEntityInfo(entityId);
            if (entityInfo == null)
            {
                return null;
            }

            return entityInfo.Entity;
        }

        /// <summary>
        /// 获取实体。
        /// </summary>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <returns>要获取的实体。</returns>
        public IEntity GetEntity(string entityAssetName)
        {
            if (string.IsNullOrEmpty(entityAssetName))
            {
                throw new GameFrameworkException("Entity asset name is invalid.");
            }

            foreach (KeyValuePair<int, EntityInfo> entityInfo in _entityInfos)
            {
                if (entityInfo.Value.Entity.EntityAssetName == entityAssetName)
                {
                    return entityInfo.Value.Entity;
                }
            }

            return null;
        }

        /// <summary>
        /// 获取实体。
        /// </summary>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <returns>要获取的实体。</returns>
        public IEntity[] GetEntities(string entityAssetName)
        {
            if (string.IsNullOrEmpty(entityAssetName))
            {
                throw new GameFrameworkException("Entity asset name is invalid.");
            }

            List<IEntity> results = new List<IEntity>();
            foreach (KeyValuePair<int, EntityInfo> entityInfo in _entityInfos)
            {
                if (entityInfo.Value.Entity.EntityAssetName == entityAssetName)
                {
                    results.Add(entityInfo.Value.Entity);
                }
            }

            return results.ToArray();
        }

        /// <summary>
        /// 获取实体。
        /// </summary>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <param name="results">要获取的实体。</param>
        public void GetEntities(string entityAssetName, List<IEntity> results)
        {
            if (string.IsNullOrEmpty(entityAssetName))
            {
                throw new GameFrameworkException("Entity asset name is invalid.");
            }

            if (results == null)
            {
                throw new GameFrameworkException("Results is invalid.");
            }

            results.Clear();
            foreach (KeyValuePair<int, EntityInfo> entityInfo in _entityInfos)
            {
                if (entityInfo.Value.Entity.EntityAssetName == entityAssetName)
                {
                    results.Add(entityInfo.Value.Entity);
                }
            }
        }

        /// <summary>
        /// 获取所有已加载的实体。
        /// </summary>
        /// <returns>所有已加载的实体。</returns>
        public IEntity[] GetAllLoadedEntities()
        {
            int index = 0;
            IEntity[] results = new IEntity[_entityInfos.Count];
            foreach (KeyValuePair<int, EntityInfo> entityInfo in _entityInfos)
            {
                results[index++] = entityInfo.Value.Entity;
            }

            return results;
        }

        /// <summary>
        /// 获取所有已加载的实体。
        /// </summary>
        /// <param name="results">所有已加载的实体。</param>
        public void GetAllLoadedEntities(List<IEntity> results)
        {
            if (results == null)
            {
                throw new GameFrameworkException("Results is invalid.");
            }

            results.Clear();
            foreach (KeyValuePair<int, EntityInfo> entityInfo in _entityInfos)
            {
                results.Add(entityInfo.Value.Entity);
            }
        }

        /// <summary>
        /// 获取所有正在加载实体的编号。
        /// </summary>
        /// <returns>所有正在加载实体的编号。</returns>
        public int[] GetAllLoadingEntityIds()
        {
            int index = 0;
            int[] results = new int[_entitiesBeingLoaded.Count];
            foreach (KeyValuePair<int, int> entityBeingLoaded in _entitiesBeingLoaded)
            {
                results[index++] = entityBeingLoaded.Key;
            }

            return results;
        }

        /// <summary>
        /// 获取所有正在加载实体的编号。
        /// </summary>
        /// <param name="results">所有正在加载实体的编号。</param>
        public void GetAllLoadingEntityIds(List<int> results)
        {
            if (results == null)
            {
                throw new GameFrameworkException("Results is invalid.");
            }

            results.Clear();
            foreach (KeyValuePair<int, int> entityBeingLoaded in _entitiesBeingLoaded)
            {
                results.Add(entityBeingLoaded.Key);
            }
        }

        /// <summary>
        /// 是否正在加载实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <returns>是否正在加载实体。</returns>
        public bool IsLoadingEntity(int entityId)
        {
            return _entitiesBeingLoaded.ContainsKey(entityId);
        }

        /// <summary>
        /// 是否是合法的实体。
        /// </summary>
        /// <param name="entity">实体。</param>
        /// <returns>实体是否合法。</returns>
        public bool IsValidEntity(IEntity entity)
        {
            if (entity == null)
            {
                return false;
            }

            return HasEntity(entity.Id);
        }

        /// <summary>
        /// 显示实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <param name="entityGroupName">实体组名称。</param>
        public void ShowEntity(int entityId, string entityAssetName, string entityGroupName)
        {
            ShowEntity(entityId, entityAssetName, entityGroupName, EntityModule.DefaultPriority, null);
        }

        /// <summary>
        /// 显示实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <param name="entityGroupName">实体组名称。</param>
        /// <param name="priority">加载实体资源的优先级。</param>
        public void ShowEntity(int entityId, string entityAssetName, string entityGroupName, int priority)
        {
            ShowEntity(entityId, entityAssetName, entityGroupName, priority, null);
        }

        /// <summary>
        /// 显示实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <param name="entityGroupName">实体组名称。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void ShowEntity(int entityId, string entityAssetName, string entityGroupName, object userData)
        {
            ShowEntity(entityId, entityAssetName, entityGroupName, EntityModule.DefaultPriority, userData);
        }

        /// <summary>
        /// 同步显示实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <param name="entityGroupName">实体组名称。</param>
        /// <param name="priority">加载实体资源的优先级。</param>
        /// <param name="userData">用户自定义数据。</param>
        public T ShowEntitySync<T>(int entityId, string entityAssetName, string entityGroupName, int priority = 0, object userData = null) where T : class
        {
            if (_resourceModule == null)
            {
                throw new GameFrameworkException("You must set resource manager first.");
            }

            if (_entityHelper == null)
            {
                throw new GameFrameworkException("You must set entity helper first.");
            }

            if (string.IsNullOrEmpty(entityAssetName))
            {
                throw new GameFrameworkException("Entity asset name is invalid.");
            }

            if (string.IsNullOrEmpty(entityGroupName))
            {
                throw new GameFrameworkException("Entity group name is invalid.");
            }

            if (HasEntity(entityId))
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity id '{0}' is already exist.", entityId));
            }

            if (IsLoadingEntity(entityId))
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity '{0}' is already being loaded.", entityId));
            }

            EntityGroup entityGroup = (EntityGroup)GetEntityGroup(entityGroupName);
            if (entityGroup == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity group '{0}' is not exist.", entityGroupName));
            }

            EntityInstanceObject entityInstanceObject = entityGroup.SpawnEntityInstanceObject(entityAssetName);
            if (entityInstanceObject == null)
            {
                int serialId = ++_serial;
                _entitiesBeingLoaded.Add(entityId, serialId);
                var assetInfo = _resourceModule.GetAssetInfo(entityAssetName);
                if (!string.IsNullOrEmpty(assetInfo.Error))
                {
                    LoadAssetFailureCallback(entityAssetName,assetInfo.Error,null);
                    return default;
                }
                float duration = GameTime.time;
                UnityEngine.GameObject gameObject = _resourceModule.LoadAsset<UnityEngine.GameObject>(assetInfo.Address);
                duration = GameTime.time - duration;
                Entity entity = (Entity)LoadAssetSuccessCallback(entityAssetName, gameObject, duration, ShowEntityInfo.Create(serialId, entityId, entityGroup, userData));
                return entity.Logic as T;
            }
            return InternalShowEntity(entityId, entityAssetName, entityGroup, entityInstanceObject.Target, false, 0f, userData) as T;
        }

        /// <summary>
        /// 异步显示实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <param name="entityGroupName">实体组名称。</param>
        /// <param name="priority">加载实体资源的优先级。</param>
        /// <param name="userData">用户自定义数据。</param>
        public async UniTask<T> ShowEntityAsync<T>(int entityId, string entityAssetName, string entityGroupName, int priority = 0, object userData = null) where T : class
        {
            if (_resourceModule == null)
            {
                throw new GameFrameworkException("You must set resource manager first.");
            }

            if (_entityHelper == null)
            {
                throw new GameFrameworkException("You must set entity helper first.");
            }

            if (string.IsNullOrEmpty(entityAssetName))
            {
                throw new GameFrameworkException("Entity asset name is invalid.");
            }

            if (string.IsNullOrEmpty(entityGroupName))
            {
                throw new GameFrameworkException("Entity group name is invalid.");
            }

            if (HasEntity(entityId))
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity id '{0}' is already exist.", entityId));
            }

            if (IsLoadingEntity(entityId))
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity '{0}' is already being loaded.", entityId));
            }

            EntityGroup entityGroup = (EntityGroup)GetEntityGroup(entityGroupName);
            if (entityGroup == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity group '{0}' is not exist.", entityGroupName));
            }

            EntityInstanceObject entityInstanceObject = entityGroup.SpawnEntityInstanceObject(entityAssetName);
            if (entityInstanceObject == null)
            {
                int serialId = ++_serial;
                _entitiesBeingLoaded.Add(entityId, serialId);
                var assetInfo = _resourceModule.GetAssetInfo(entityAssetName);
                if (!string.IsNullOrEmpty(assetInfo.Error))
                {
                    LoadAssetFailureCallback(entityAssetName,assetInfo.Error,null);
                    return default;
                }
                float duration = GameTime.time;
                UnityEngine.GameObject gameObject = await _resourceModule.LoadAssetAsync<UnityEngine.GameObject>(assetInfo.Address,CancellationToken.None);
                duration = GameTime.time - duration;
                Entity entity = (Entity)LoadAssetSuccessCallback(entityAssetName, gameObject, duration, ShowEntityInfo.Create(serialId, entityId, entityGroup, userData));
                return entity.Logic as T;
            }
            return InternalShowEntity(entityId, entityAssetName, entityGroup, entityInstanceObject.Target, false, 0f, userData) as T;
        }

        /// <summary>
        /// 显示实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <param name="entityAssetName">实体资源名称。</param>
        /// <param name="entityGroupName">实体组名称。</param>
        /// <param name="priority">加载实体资源的优先级。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void ShowEntity(int entityId, string entityAssetName, string entityGroupName, int priority, object userData)
        {
            if (_resourceModule == null)
            {
                throw new GameFrameworkException("You must set resource manager first.");
            }

            if (_entityHelper == null)
            {
                throw new GameFrameworkException("You must set entity helper first.");
            }

            if (string.IsNullOrEmpty(entityAssetName))
            {
                throw new GameFrameworkException("Entity asset name is invalid.");
            }

            if (string.IsNullOrEmpty(entityGroupName))
            {
                throw new GameFrameworkException("Entity group name is invalid.");
            }

            if (HasEntity(entityId))
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity id '{0}' is already exist.", entityId));
            }

            if (IsLoadingEntity(entityId))
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity '{0}' is already being loaded.", entityId));
            }

            EntityGroup entityGroup = (EntityGroup)GetEntityGroup(entityGroupName);
            if (entityGroup == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Entity group '{0}' is not exist.", entityGroupName));
            }

            EntityInstanceObject entityInstanceObject = entityGroup.SpawnEntityInstanceObject(entityAssetName);
            if (entityInstanceObject == null)
            {
                int serialId = ++_serial;
                _entitiesBeingLoaded.Add(entityId, serialId);
                var assetInfo = _resourceModule.GetAssetInfo(entityAssetName);
                if (!string.IsNullOrEmpty(assetInfo.Error))
                {
                    LoadAssetFailureCallback(entityAssetName,assetInfo.Error,null);
                    return;
                }
                float duration = GameTime.time;
                _resourceModule.LoadAsset<UnityEngine.GameObject>(assetInfo.Address, gameObject =>
                {
                    duration = GameTime.time - duration;
                    LoadAssetSuccessCallback(entityAssetName, gameObject, duration, ShowEntityInfo.Create(serialId, entityId, entityGroup, userData));
                }).Forget();
                return;
            }

            InternalShowEntity(entityId, entityAssetName, entityGroup, entityInstanceObject.Target, false, 0f, userData);
        }

        /// <summary>
        /// 隐藏实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        public void HideEntity(int entityId)
        {
            HideEntity(entityId, null);
        }

        /// <summary>
        /// 隐藏实体。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void HideEntity(int entityId, object userData)
        {
            if (IsLoadingEntity(entityId))
            {
                _entitiesToReleaseOnLoad.Add(_entitiesBeingLoaded[entityId]);
                _entitiesBeingLoaded.Remove(entityId);
                return;
            }

            EntityInfo entityInfo = GetEntityInfo(entityId);
            if (entityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find entity '{0}'.", entityId));
            }

            InternalHideEntity(entityInfo, userData);
        }

        /// <summary>
        /// 隐藏实体。
        /// </summary>
        /// <param name="entity">实体。</param>
        public void HideEntity(IEntity entity)
        {
            HideEntity(entity, null);
        }

        /// <summary>
        /// 隐藏实体。
        /// </summary>
        /// <param name="entity">实体。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void HideEntity(IEntity entity, object userData)
        {
            if (entity == null)
            {
                throw new GameFrameworkException("Entity is invalid.");
            }

            HideEntity(entity.Id, userData);
        }

        /// <summary>
        /// 隐藏所有已加载的实体。
        /// </summary>
        public void HideAllLoadedEntities()
        {
            HideAllLoadedEntities(null);
        }

        /// <summary>
        /// 隐藏所有已加载的实体。
        /// </summary>
        /// <param name="userData">用户自定义数据。</param>
        public void HideAllLoadedEntities(object userData)
        {
            while (_entityInfos.Count > 0)
            {
                foreach (KeyValuePair<int, EntityInfo> entityInfo in _entityInfos)
                {
                    InternalHideEntity(entityInfo.Value, userData);
                    break;
                }
            }
        }

        /// <summary>
        /// 隐藏所有正在加载的实体。
        /// </summary>
        public void HideAllLoadingEntities()
        {
            foreach (KeyValuePair<int, int> entityBeingLoaded in _entitiesBeingLoaded)
            {
                _entitiesToReleaseOnLoad.Add(entityBeingLoaded.Value);
            }

            _entitiesBeingLoaded.Clear();
        }

        /// <summary>
        /// 获取父实体。
        /// </summary>
        /// <param name="childEntityId">要获取父实体的子实体的实体编号。</param>
        /// <returns>子实体的父实体。</returns>
        public IEntity GetParentEntity(int childEntityId)
        {
            EntityInfo childEntityInfo = GetEntityInfo(childEntityId);
            if (childEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find child entity '{0}'.", childEntityId));
            }

            return childEntityInfo.ParentEntity;
        }

        /// <summary>
        /// 获取父实体。
        /// </summary>
        /// <param name="childEntity">要获取父实体的子实体。</param>
        /// <returns>子实体的父实体。</returns>
        public IEntity GetParentEntity(IEntity childEntity)
        {
            if (childEntity == null)
            {
                throw new GameFrameworkException("Child entity is invalid.");
            }

            return GetParentEntity(childEntity.Id);
        }

        /// <summary>
        /// 获取子实体数量。
        /// </summary>
        /// <param name="parentEntityId">要获取子实体数量的父实体的实体编号。</param>
        /// <returns>子实体数量。</returns>
        public int GetChildEntityCount(int parentEntityId)
        {
            EntityInfo parentEntityInfo = GetEntityInfo(parentEntityId);
            if (parentEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find parent entity '{0}'.", parentEntityId));
            }

            return parentEntityInfo.ChildEntityCount;
        }

        /// <summary>
        /// 获取子实体。
        /// </summary>
        /// <param name="parentEntityId">要获取子实体的父实体的实体编号。</param>
        /// <returns>子实体。</returns>
        public IEntity GetChildEntity(int parentEntityId)
        {
            EntityInfo parentEntityInfo = GetEntityInfo(parentEntityId);
            if (parentEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find parent entity '{0}'.", parentEntityId));
            }

            return parentEntityInfo.GetChildEntity();
        }

        /// <summary>
        /// 获取子实体。
        /// </summary>
        /// <param name="parentEntity">要获取子实体的父实体。</param>
        /// <returns>子实体。</returns>
        public IEntity GetChildEntity(IEntity parentEntity)
        {
            if (parentEntity == null)
            {
                throw new GameFrameworkException("Parent entity is invalid.");
            }

            return GetChildEntity(parentEntity.Id);
        }

        /// <summary>
        /// 获取所有子实体。
        /// </summary>
        /// <param name="parentEntityId">要获取所有子实体的父实体的实体编号。</param>
        /// <returns>所有子实体。</returns>
        public IEntity[] GetChildEntities(int parentEntityId)
        {
            EntityInfo parentEntityInfo = GetEntityInfo(parentEntityId);
            if (parentEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find parent entity '{0}'.", parentEntityId));
            }

            return parentEntityInfo.GetChildEntities();
        }

        /// <summary>
        /// 获取所有子实体。
        /// </summary>
        /// <param name="parentEntityId">要获取所有子实体的父实体的实体编号。</param>
        /// <param name="results">所有子实体。</param>
        public void GetChildEntities(int parentEntityId, List<IEntity> results)
        {
            EntityInfo parentEntityInfo = GetEntityInfo(parentEntityId);
            if (parentEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find parent entity '{0}'.", parentEntityId));
            }

            parentEntityInfo.GetChildEntities(results);
        }

        /// <summary>
        /// 获取所有子实体。
        /// </summary>
        /// <param name="parentEntity">要获取所有子实体的父实体。</param>
        /// <returns>所有子实体。</returns>
        public IEntity[] GetChildEntities(IEntity parentEntity)
        {
            if (parentEntity == null)
            {
                throw new GameFrameworkException("Parent entity is invalid.");
            }

            return GetChildEntities(parentEntity.Id);
        }

        /// <summary>
        /// 获取所有子实体。
        /// </summary>
        /// <param name="parentEntity">要获取所有子实体的父实体。</param>
        /// <param name="results">所有子实体。</param>
        public void GetChildEntities(IEntity parentEntity, List<IEntity> results)
        {
            if (parentEntity == null)
            {
                throw new GameFrameworkException("Parent entity is invalid.");
            }

            GetChildEntities(parentEntity.Id, results);
        }

        /// <summary>
        /// 附加子实体。
        /// </summary>
        /// <param name="childEntityId">要附加的子实体的实体编号。</param>
        /// <param name="parentEntityId">被附加的父实体的实体编号。</param>
        public void AttachEntity(int childEntityId, int parentEntityId)
        {
            AttachEntity(childEntityId, parentEntityId, null);
        }

        /// <summary>
        /// 附加子实体。
        /// </summary>
        /// <param name="childEntityId">要附加的子实体的实体编号。</param>
        /// <param name="parentEntityId">被附加的父实体的实体编号。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void AttachEntity(int childEntityId, int parentEntityId, object userData)
        {
            if (childEntityId == parentEntityId)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not attach entity when child entity id equals to parent entity id '{0}'.", parentEntityId));
            }

            EntityInfo childEntityInfo = GetEntityInfo(childEntityId);
            if (childEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find child entity '{0}'.", childEntityId));
            }

            if (childEntityInfo.Status >= EntityStatus.WillHide)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not attach entity when child entity status is '{0}'.", childEntityInfo.Status));
            }

            EntityInfo parentEntityInfo = GetEntityInfo(parentEntityId);
            if (parentEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find parent entity '{0}'.", parentEntityId));
            }

            if (parentEntityInfo.Status >= EntityStatus.WillHide)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not attach entity when parent entity status is '{0}'.", parentEntityInfo.Status));
            }

            IEntity childEntity = childEntityInfo.Entity;
            IEntity parentEntity = parentEntityInfo.Entity;
            DetachEntity(childEntity.Id, userData);
            childEntityInfo.ParentEntity = parentEntity;
            parentEntityInfo.AddChildEntity(childEntity);
            parentEntity.OnAttached(childEntity, userData);
            childEntity.OnAttachTo(parentEntity, userData);
        }

        /// <summary>
        /// 附加子实体。
        /// </summary>
        /// <param name="childEntityId">要附加的子实体的实体编号。</param>
        /// <param name="parentEntity">被附加的父实体。</param>
        public void AttachEntity(int childEntityId, IEntity parentEntity)
        {
            AttachEntity(childEntityId, parentEntity, null);
        }

        /// <summary>
        /// 附加子实体。
        /// </summary>
        /// <param name="childEntityId">要附加的子实体的实体编号。</param>
        /// <param name="parentEntity">被附加的父实体。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void AttachEntity(int childEntityId, IEntity parentEntity, object userData)
        {
            if (parentEntity == null)
            {
                throw new GameFrameworkException("Parent entity is invalid.");
            }

            AttachEntity(childEntityId, parentEntity.Id, userData);
        }

        /// <summary>
        /// 附加子实体。
        /// </summary>
        /// <param name="childEntity">要附加的子实体。</param>
        /// <param name="parentEntityId">被附加的父实体的实体编号。</param>
        public void AttachEntity(IEntity childEntity, int parentEntityId)
        {
            AttachEntity(childEntity, parentEntityId, null);
        }

        /// <summary>
        /// 附加子实体。
        /// </summary>
        /// <param name="childEntity">要附加的子实体。</param>
        /// <param name="parentEntityId">被附加的父实体的实体编号。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void AttachEntity(IEntity childEntity, int parentEntityId, object userData)
        {
            if (childEntity == null)
            {
                throw new GameFrameworkException("Child entity is invalid.");
            }

            AttachEntity(childEntity.Id, parentEntityId, userData);
        }

        /// <summary>
        /// 附加子实体。
        /// </summary>
        /// <param name="childEntity">要附加的子实体。</param>
        /// <param name="parentEntity">被附加的父实体。</param>
        public void AttachEntity(IEntity childEntity, IEntity parentEntity)
        {
            AttachEntity(childEntity, parentEntity, null);
        }

        /// <summary>
        /// 附加子实体。
        /// </summary>
        /// <param name="childEntity">要附加的子实体。</param>
        /// <param name="parentEntity">被附加的父实体。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void AttachEntity(IEntity childEntity, IEntity parentEntity, object userData)
        {
            if (childEntity == null)
            {
                throw new GameFrameworkException("Child entity is invalid.");
            }

            if (parentEntity == null)
            {
                throw new GameFrameworkException("Parent entity is invalid.");
            }

            AttachEntity(childEntity.Id, parentEntity.Id, userData);
        }

        /// <summary>
        /// 解除子实体。
        /// </summary>
        /// <param name="childEntityId">要解除的子实体的实体编号。</param>
        public void DetachEntity(int childEntityId)
        {
            DetachEntity(childEntityId, null);
        }

        /// <summary>
        /// 解除子实体。
        /// </summary>
        /// <param name="childEntityId">要解除的子实体的实体编号。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void DetachEntity(int childEntityId, object userData)
        {
            EntityInfo childEntityInfo = GetEntityInfo(childEntityId);
            if (childEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find child entity '{0}'.", childEntityId));
            }

            IEntity parentEntity = childEntityInfo.ParentEntity;
            if (parentEntity == null)
            {
                return;
            }

            EntityInfo parentEntityInfo = GetEntityInfo(parentEntity.Id);
            if (parentEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find parent entity '{0}'.", parentEntity.Id));
            }

            IEntity childEntity = childEntityInfo.Entity;
            childEntityInfo.ParentEntity = null;
            parentEntityInfo.RemoveChildEntity(childEntity);
            parentEntity.OnDetached(childEntity, userData);
            childEntity.OnDetachFrom(parentEntity, userData);
        }

        /// <summary>
        /// 解除子实体。
        /// </summary>
        /// <param name="childEntity">要解除的子实体。</param>
        public void DetachEntity(IEntity childEntity)
        {
            DetachEntity(childEntity, null);
        }

        /// <summary>
        /// 解除子实体。
        /// </summary>
        /// <param name="childEntity">要解除的子实体。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void DetachEntity(IEntity childEntity, object userData)
        {
            if (childEntity == null)
            {
                throw new GameFrameworkException("Child entity is invalid.");
            }

            DetachEntity(childEntity.Id, userData);
        }

        /// <summary>
        /// 解除所有子实体。
        /// </summary>
        /// <param name="parentEntityId">被解除的父实体的实体编号。</param>
        public void DetachChildEntities(int parentEntityId)
        {
            DetachChildEntities(parentEntityId, null);
        }

        /// <summary>
        /// 解除所有子实体。
        /// </summary>
        /// <param name="parentEntityId">被解除的父实体的实体编号。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void DetachChildEntities(int parentEntityId, object userData)
        {
            EntityInfo parentEntityInfo = GetEntityInfo(parentEntityId);
            if (parentEntityInfo == null)
            {
                throw new GameFrameworkException(Utility.Text.Format("Can not find parent entity '{0}'.", parentEntityId));
            }

            while (parentEntityInfo.ChildEntityCount > 0)
            {
                IEntity childEntity = parentEntityInfo.GetChildEntity();
                DetachEntity(childEntity.Id, userData);
            }
        }

        /// <summary>
        /// 解除所有子实体。
        /// </summary>
        /// <param name="parentEntity">被解除的父实体。</param>
        public void DetachChildEntities(IEntity parentEntity)
        {
            DetachChildEntities(parentEntity, null);
        }

        /// <summary>
        /// 解除所有子实体。
        /// </summary>
        /// <param name="parentEntity">被解除的父实体。</param>
        /// <param name="userData">用户自定义数据。</param>
        public void DetachChildEntities(IEntity parentEntity, object userData)
        {
            if (parentEntity == null)
            {
                throw new GameFrameworkException("Parent entity is invalid.");
            }

            DetachChildEntities(parentEntity.Id, userData);
        }

        /// <summary>
        /// 获取实体信息。
        /// </summary>
        /// <param name="entityId">实体编号。</param>
        /// <returns>实体信息。</returns>
        private EntityInfo GetEntityInfo(int entityId)
        {
            if (_entityInfos.TryGetValue(entityId, out var entityInfo))
            {
                return entityInfo;
            }

            return null;
        }

        private IEntity InternalShowEntity(int entityId, string entityAssetName, EntityGroup entityGroup, object entityInstance, bool isNewInstance, float duration, object userData)
        {
            try
            {
                IEntity entity = _entityHelper.CreateEntity(entityInstance, entityGroup, userData);
                if (entity == null)
                {
                    throw new GameFrameworkException("Can not create entity in entity helper.");
                }

                EntityInfo entityInfo = EntityInfo.Create(entity);
                _entityInfos.Add(entityId, entityInfo);
                entityInfo.Status = EntityStatus.WillInit;
                entity.OnInit(entityId, entityAssetName, entityGroup, isNewInstance, userData);
                entityInfo.Status = EntityStatus.Inited;
                entityGroup.AddEntity(entity);
                entityInfo.Status = EntityStatus.WillShow;
                entity.OnShow(userData);
                entityInfo.Status = EntityStatus.Showed;

                if (_showEntitySuccessEventHandler != null)
                {
                    TEngine.ShowEntityInfo showEntityInfo = (TEngine.ShowEntityInfo)userData;
                    Type entityLogicType = showEntityInfo.EntityLogicType;
                    _showEntitySuccessEventHandler.Invoke(entityLogicType, entity, duration, userData);
                }
                return entity;
            }
            catch (Exception exception)
            {
                if (_showEntityFailureEventHandler != null)
                {
                    TEngine.ShowEntityInfo showEntityInfo = (TEngine.ShowEntityInfo)userData;
                    Type entityLogicType = showEntityInfo.EntityLogicType;
                    _showEntityFailureEventHandler.Invoke(entityId,entityLogicType,entityAssetName, entityGroup.Name, exception.ToString(), userData);
                    return null;
                }

                throw;
            }
        }

        private void InternalHideEntity(EntityInfo entityInfo, object userData)
        {
            while (entityInfo.ChildEntityCount > 0)
            {
                IEntity childEntity = entityInfo.GetChildEntity();
                HideEntity(childEntity.Id, userData);
            }

            if (entityInfo.Status == EntityStatus.Hidden)
            {
                return;
            }

            IEntity entity = entityInfo.Entity;
            DetachEntity(entity.Id, userData);
            entityInfo.Status = EntityStatus.WillHide;
            entity.OnHide(_isShutdown, userData);
            entityInfo.Status = EntityStatus.Hidden;

            EntityGroup entityGroup = (EntityGroup)entity.EntityGroup;
            if (entityGroup == null)
            {
                throw new GameFrameworkException("Entity group is invalid.");
            }

            entityGroup.RemoveEntity(entity);
            if (!_entityInfos.Remove(entity.Id))
            {
                throw new GameFrameworkException("Entity info is unmanaged.");
            }

            if (_hideEntityCompleteEventHandler != null)
            {
                _hideEntityCompleteEventHandler.Invoke(entity.Id, entity.EntityAssetName, entityGroup.Name, userData);
            }

            _recycleQueue.Enqueue(entityInfo);
        }

        private IEntity LoadAssetSuccessCallback(string entityAssetName, object entityAsset, float duration, object userData)
        {
            ShowEntityInfo showEntityInfo = (ShowEntityInfo)userData;
            if (showEntityInfo == null)
            {
                throw new GameFrameworkException("Show entity info is invalid.");
            }

            if (_entitiesToReleaseOnLoad.Contains(showEntityInfo.SerialId))
            {
                _entitiesToReleaseOnLoad.Remove(showEntityInfo.SerialId);
                MemoryPool.Release(showEntityInfo);
                _entityHelper.ReleaseEntity(entityAsset, null);
                return null;
            }

            _entitiesBeingLoaded.Remove(showEntityInfo.EntityId);
            EntityInstanceObject entityInstanceObject = EntityInstanceObject.Create(entityAssetName, entityAsset, _entityHelper.InstantiateEntity(entityAsset), _entityHelper);
            showEntityInfo.EntityGroup.RegisterEntityInstanceObject(entityInstanceObject, true);

            IEntity entity = InternalShowEntity(showEntityInfo.EntityId, entityAssetName, showEntityInfo.EntityGroup, entityInstanceObject.Target, true, duration, showEntityInfo.UserData);
            MemoryPool.Release(showEntityInfo);
            return entity;
        }

        private void LoadAssetFailureCallback(string entityAssetName, string errorMessage, object userData)
        {
            ShowEntityInfo showEntityInfo = (ShowEntityInfo)userData;
            if (showEntityInfo == null)
            {
                throw new GameFrameworkException("Show entity info is invalid.");
            }

            if (_entitiesToReleaseOnLoad.Contains(showEntityInfo.SerialId))
            {
                _entitiesToReleaseOnLoad.Remove(showEntityInfo.SerialId);
                return;
            }

            _entitiesBeingLoaded.Remove(showEntityInfo.EntityId);
            string appendErrorMessage = Utility.Text.Format("Load entity failure, asset name '{0}', error message '{1}'.", entityAssetName, errorMessage);
            if (_showEntityFailureEventHandler != null)
            {
                TEngine.ShowEntityInfo info = (TEngine.ShowEntityInfo)showEntityInfo.UserData;
                Type entityLogicType = info.EntityLogicType;
                _showEntityFailureEventHandler.Invoke(showEntityInfo.EntityId, entityLogicType, entityAssetName, showEntityInfo.EntityGroup.Name, appendErrorMessage, showEntityInfo.UserData);
                return;
            }

            throw new GameFrameworkException(appendErrorMessage);
        }
    }
}