// ***********************************************************************
// Assembly         : Unity
// Author           : Kimch
// Created          : 2018-2-29
// Description      : 游戏逻辑实体管理器，对游戏中所有Entity提供创建，移除和管理
// Last Modified By : 
// Last Modified On : 
// ***********************************************************************
// <copyright file= "EntityManager" company=""></copyright>
// <summary></summary>
// ***********************************************************************
namespace G
{
	using System.Collections.Generic;
	using F;
	using F.Entity;
	using F.ObjectPool;
	using UnityEngine;

	public partial class EntityManager : MonoBehaviour
	{
		public const string ASSET_POOL_NAME = "entities";

		/// <summary>
		/// 框架层提供管理
		/// </summary>
		private IEntityManager _entityManager;
		/// <summary>
		/// 
		/// </summary>
		private IEntityGroup<Entity> _defaultGroup;
		/// <summary>
		/// 
		/// </summary>
		private IEntityGroup<EntityEnemy> _bossGroup;
		/// <summary>
		/// 
		/// </summary>
		private IEntityGroup<EntityEnemy> _minionGroup;
		/// <summary>
		/// 
		/// </summary>
		private IEntityGroup<EntityProp> _propGroup;

		private Transform defaultRoot
		{
			get => this.transform;
		}

		/// <summary>
		/// 
		/// </summary>
		public List<GameObject> propPrefabs = new List<GameObject>(4);
		/// <summary>
		/// 
		/// </summary>
		public List<GameObject> cartPrefabs = new List<GameObject>(1);
		/// <summary>
		/// 
		/// </summary>
		public List<GameObject> dropPrefabs = new List<GameObject>(1);

		#region Method

		private static int _LocalGuid = 100000;
		public static int GetLocalGuid()
		{
			return _LocalGuid++;
		}

		public void Initialize(System.Action completed)
		{
			_entityManager = KFramework.EntityManager;

			_defaultGroup = this.AddEntityGroup<Entity>();
			_bossGroup = this.AddEntityGroup<EntityEnemy>("b");
			_minionGroup = this.AddEntityGroup<EntityEnemy>("m");
			_propGroup = this.AddEntityGroup<EntityProp>();

			completed?.Invoke();
		}

		private void OnInitialized()
		{

		}

		/// <summary>
		/// 
		/// </summary>
		/// <typeparam name="T"></typeparam>
		/// <returns></returns>
		private IEntityGroup<T> AddEntityGroup<T>(string sub = "") where T : Entity
		{
			var fullName = Utils.Text.GetFullName<T>(sub);

			if (_entityManager.HasGroup(fullName))
				return _entityManager.GetGroup<T>(fullName);
			else
				return _entityManager.AddGroup<T>(fullName);
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="entity"></param>
		public void RemoveEntity(Entity entity)
		{
			if (entity != null)
			{
				_entityManager.RemoveEntity(entity.id);
				entity.Dispose();
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public void RemoveAllEntity()
		{
			//if (_mainPlayer != null)
			//	_mainPlayer.Dispose();

			//
			foreach (var entity in _defaultGroup.GetAllEntities())
			{
				entity.Dispose();
			}
			_defaultGroup.RemoveAll();

			//
			foreach (var entity in _bossGroup.GetAllEntities())
			{
				entity.Dispose();
			}
			_bossGroup.RemoveAll();

			//
			foreach (var entity in _minionGroup.GetAllEntities())
			{
				entity.Dispose();
			}
			_minionGroup.RemoveAll();

			foreach (var entity in _propGroup.GetAllEntities())
			{
				entity.Dispose();
			}
			_propGroup.RemoveAll();
		}

		/// <summary>
		/// 
		/// </summary>
		public void RemoveAllProp()
		{
			foreach (var entity in _propGroup.GetAllEntities())
			{
				entity.Dispose();
			}
			_propGroup.RemoveAll();
		}

		/// <summary>
		/// 
		/// </summary>
		public void RemoveAllEnemy()
		{
			foreach (var entity in _bossGroup.GetAllEntities())
			{
				entity.Dispose();
			}
			_bossGroup.RemoveAll();

			foreach (var entity in _minionGroup.GetAllEntities())
			{
				entity.Dispose();
			}
			_minionGroup.RemoveAll();
		}

		#endregion

		#region 响应事件

		/// <summary>
		/// 进入场景
		/// </summary>
		public void OnEnterScene()
		{
			AssetProxy.Instance.CreateReleasePool(ASSET_POOL_NAME);

			this.CreateMainPlayer();
			//EntityMainPlayer.Instance.OnEnterScene();
		}

		/// <summary>
		/// 离开场景
		/// </summary>
		public void OnExitScene()
		{
			_entityManager.Clear();

			AssetProxy.Instance.RemoveReleasePool(ASSET_POOL_NAME);
		}

		#endregion

		#region 创建 

		/// <summary>
		/// 创建主角
		/// </summary>
		public void CreateMainPlayer()
		{
		}

		/// <summary>
		/// 创建Boss
		/// </summary>
		public void CreateBoss(EntityInfo info)
		{
			if (_bossGroup != null)
			{
				info.guid = GetLocalGuid();
				var boss = new GameObject(info.name).AddComponent<EntityBoss>();
				boss.transform.parent = defaultRoot;
				boss.Init(info);

				_bossGroup.AddEntity(boss);
			}
		}

		/// <summary>
		/// 创建小兵
		/// </summary>
		/// <param name="info"></param>
		public void CreateMinion(EntityInfo info)
		{
			if (_minionGroup != null)
			{
				info.guid = GetLocalGuid();

				var monster = new GameObject(info.name).AddComponent<EntityMinion>();
				monster.transform.parent = defaultRoot;
				monster.Init(info);

				_minionGroup.AddEntity(monster);
			}
		}

		/// <summary>
		/// 创建掉落包
		/// </summary>
		public void CreateDropItem(EntityInfo info)
		{
			if (_defaultGroup != null && dropPrefabs.Count > 0)
			{
				info.guid = GetLocalGuid();
				var dropGO = SpawnPool.Spawn(dropPrefabs[0]);
				dropGO.transform.parent = defaultRoot;
				var drop = dropGO.GetComponent<EntityDrop>();
				drop.Init(info);

				_defaultGroup.AddEntity(drop);
			}
		}

		/// <summary>
		/// 道具
		/// </summary>
		/// <param name="info"></param>
		public void CreateProp(EntityInfo info)
		{
			if (_propGroup != null && info.itemId <= propPrefabs.Count)
			{
				var prefab = propPrefabs[info.itemId - 1];
				if (prefab)
				{
					info.guid = GetLocalGuid();
					var propGO = Object.Instantiate(prefab);
					propGO.transform.parent = defaultRoot;
					var prop = propGO.GetComponent<EntityProp>();
					prop.Init(info);
					_propGroup.AddEntity(prop);
				}
			}
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="info"></param>
		public void CreateCart(EntityInfo info)
		{
			if (_defaultGroup != null && cartPrefabs.Count > 0)
			{
				info.guid = GetLocalGuid();
				var cart = Object.Instantiate(cartPrefabs[0], defaultRoot).GetComponent<EntityCart>();
				cart.Init(info);
				//_defaultGroup.AddEntity(cart);
			}
		}

		#endregion

		#region 查找

		public Entity FindEntity(int id)
		{
			return _entityManager.GetEntity(id) as Entity;
		}

		public IReadOnlyCollection<EntityEnemy> FindAllBossInScene()
		{
			return _bossGroup.GetAllEntities();
		}

		public IReadOnlyCollection<EntityEnemy> FindAllMinionInScene()
		{
			return _minionGroup.GetAllEntities();
		}

		public IReadOnlyCollection<EntityProp> FindAllPropInScene()
		{
			return _propGroup.GetAllEntities();
		}

		#endregion

		#region 父子关系

		public Entity GetParent(int id)
		{
			return _entityManager.GetEntityParent(id) as Entity;
		}

		public void SetParent(int id, int parentId)
		{
			_entityManager.SetParentEntity(id, parentId);
		}

		readonly List<IEntity> _childEntities = new List<IEntity>(8);
		public bool GetChildren(int id, List<Entity> result)
		{
			if (result != null && _entityManager.GetEntityChildren(id, _childEntities))
			{
				foreach (var item in _childEntities)
				{
					result.Add(item as Entity);
				}
				return true;
			}
			return false;
		}

		#endregion

		#region Unity

		public static EntityManager Instance => _Instance;

		private static EntityManager _Instance;

		private void Awake()
		{
			if (_Instance)
			{
				Destroy(_Instance.gameObject);
			}
			_Instance = this;

			this.Initialize(this.OnInitialized);
			OnEnterScene();
		}

		private void OnDestroy()
		{
			OnExitScene();
		}

		#endregion
	}
}