// ***********************************************************************
// Assembly         : Unity
// Author           : Kimch
// Created          : 2020-05-31
// Description      :
// Last Modified By : Kimch
// Last Modified On : 
// ***********************************************************************
// <copyright file= "BoardManager" company="kunpo"></copyright>
// <summary></summary>
// ***********************************************************************
namespace G
{
	using System.Collections;
	using System.Collections.Generic;
	using UnityEngine;
	using UnityEngine.UI;

	public class BoardManager : MonoBehaviour
	{
		private class BoardInfo<T> where T : MonoBehaviour
		{
			private readonly Dictionary<string, GameObject> _templates = new Dictionary<string, GameObject>();
			private readonly Dictionary<string, Queue<T>> _boardQueues = new Dictionary<string, Queue<T>>();

			public async void LoadAsync(string key)
			{
				var goList = await AssetProxy.Instance.TryGetAssetsAsync<GameObject>(key, POOL_NAME).Task;
				if (goList != null)
				{
					foreach (var go in goList)
					{
						_templates.Add(go.name, go);
						_boardQueues.Add(go.name, new Queue<T>());
					}
				}
			}

			public void Load(GameObject[] templates)
			{
				if (templates != null)
				{
					foreach (var template in templates)
					{
						_templates.Add(template.name, template);
						_boardQueues.Add(template.name, new Queue<T>());
					}
				}
			}

			/// <summary>
			/// 
			/// </summary>
			/// <param name="name"></param>
			/// <param name="parent"></param>
			/// <returns></returns>
			public T Create(string name, Transform parent)
			{
				T result = default;
				if (_boardQueues.TryGetValue(name, out Queue<T> queue))
				{
					if (queue.Count > 0)
					{
						result = queue.Dequeue();
					}
					else
					{
						var go = Object.Instantiate(_templates[name], parent);
						go.name = name;
						result = go.GetComponent<T>();
						if (!result)
						{
							result = go.AddComponent<T>();
						}
					}
				}
				return result;
			}

			public void Recycle(T board)
			{
				if (_boardQueues.TryGetValue(board.name, out Queue<T> queue))
				{
					queue.Enqueue(board);
				}
			}
		}

		const string POOL_NAME = "boards";

		/// <summary>
		/// 
		/// </summary>
		private readonly BoardInfo<BloodBoard> _bloodBoardInfo = new BoardInfo<BloodBoard>();
		/// <summary>
		/// 
		/// </summary>
		private readonly BoardInfo<DamageBoard> _damageBoardInfo = new BoardInfo<DamageBoard>();
		/// <summary>
		/// 
		/// </summary>
		private readonly BoardInfo<BubbleBoard> _bubbleBoardInfo = new BoardInfo<BubbleBoard>();


		public GameObject[] bloodBoardTemplates;
		public GameObject[] damageBoardTemplates;
		public GameObject[] bubbleBoardTemplates;

		private Transform _damageLayer;
		private Transform _bloodLayer;
		private Transform _bubbleLayer;

		static BoardManager _Instance;
		public static BoardManager Instance
		{
			get { return _Instance; }
		}

		public static Vector2 ScreenPointToLocalPointInRectangle(Vector2 screenPoint)
		{
			return KUIRoot.ScreenPointToLocalPointInRectangle(screenPoint);
		}

		private void Awake()
		{
			_Instance = this;

			_damageLayer = CreateSubRoot("DamageLayer", 20);
			_bloodLayer = CreateSubRoot("BloodLayer", 40);
			_bubbleLayer = CreateSubRoot("BubbleLayer", 50);

			_bloodBoardInfo.Load(bloodBoardTemplates);
			_damageBoardInfo.Load(damageBoardTemplates);
			_bubbleBoardInfo.Load(bubbleBoardTemplates);
		}

		private void Start()
		{
			//var canvas = GetComponent<Canvas>();
			//canvas.worldCamera = KUIRoot.RootCamera;

			//AssetProxy.Instance.CreateReleasePool(POOL_NAME);		

			//_bloodBoardInfo.LoadAsync("board_blood");
			//_damageBoardInfo.LoadAsync("board_damage");
			//_bubbleBoardInfo.LoadAsync("board_bubble");
		}

		private void OnDestroy()
		{
			//AssetProxy.Instance.RemoveReleasePool(POOL_NAME);
		}

		private Transform CreateSubRoot(string name, int sort)
		{
			var go = new GameObject(name)
			{
				layer = this.gameObject.layer
			};
			var rectT = go.AddComponent<RectTransform>();
			rectT.SetParent(this.transform, false);
			rectT.localPosition = new Vector3(0, 0, -sort);
			rectT.anchorMin = Vector2.zero;
			rectT.anchorMax = Vector2.one;
			rectT.offsetMax = Vector2.zero;
			rectT.offsetMin = Vector2.zero;
			return go.transform;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="name">template name</param>
		/// <returns></returns>
		public DamageBoard CreateDamageBoard(string name)
		{
			return _damageBoardInfo.Create(name, _damageLayer.transform);
		}

		/// <summary>
		/// 血条
		/// </summary>
		/// <returns></returns>
		public BloodBoard CreateBloodBoard(string name)
		{
			var result = _bloodBoardInfo.Create(name, _bloodLayer);
			result.Init();
			return result;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <returns></returns>
		public BubbleBoard CreateBubbleBoard(string name)
		{
			return _bubbleBoardInfo.Create(name, _bubbleLayer);
		}

		public void ReturnBoard(DamageBoard board)
		{
			board.Reset();
			_damageBoardInfo.Recycle(board);
		}

		public void ReturnBoard(BubbleBoard board)
		{
			board.Reset();
			_bubbleBoardInfo.Recycle(board);
		}

		public void ReturnBoard(BloodBoard board)
		{
			board.Reset();
			_bloodBoardInfo.Recycle(board);
		}
	}
}