// ***********************************************************************
// Assembly         : Unity
// Author           : Kimch
// Created          : 
//
// Last Modified By : Kimch
// Last Modified On : 
// ***********************************************************************
// <copyright file= "KUIPool" company=""></copyright>
// <summary></summary>
// ***********************************************************************
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

/// <summary>
/// KUIItem 对象管理池
/// </summary>
public class KUIPool : MonoBehaviour
{
	private class DataInfo
	{
#pragma warning disable CS0649 // 从未对字段“KUIPool.DataInfo.index”赋值，字段将一直保持其默认值 0
		public int index;
#pragma warning restore CS0649 // 从未对字段“KUIPool.DataInfo.index”赋值，字段将一直保持其默认值 0
#pragma warning disable CS0649 // 从未对字段“KUIPool.DataInfo.data”赋值，字段将一直保持其默认值 null
		public object data;
#pragma warning restore CS0649 // 从未对字段“KUIPool.DataInfo.data”赋值，字段将一直保持其默认值 null
	}

	public bool loop;
	public GameObject itemTemplate;

	private List<GameObject> _activeItems = new List<GameObject>();
	private List<GameObject> _returnItems = new List<GameObject>();
	private ArrayList _itemDatas = new ArrayList();

	private readonly List<DataInfo> _dataInfos = new List<DataInfo>();
	/// <summary>
	/// 物品数量
	/// </summary>
	public int itemCount
	{
		get { return loop ? int.MaxValue : _itemDatas.Count; }
	}

	/// <summary>
	/// 增加模板
	/// </summary>
	/// <typeparam name="T"></typeparam>
	public T AddTemplate<T>(bool useTemplate = false) where T : KUIWidget
	{
		if (!itemTemplate)
		{
			itemTemplate = transform.GetChild(0).gameObject;
		}

		if (itemTemplate)
		{
			var result = itemTemplate.GetComponent<T>();
			if (!result)
				result = itemTemplate.AddComponent<T>();
			itemTemplate.SetActive(false);
			if (useTemplate)
			{
				ReturnItem(itemTemplate.transform);
			}
			return result;
		}
		return default;
	}

	/// <summary>
	/// 创建物品
	/// </summary>
	/// <param name="index"></param>
	/// <returns></returns>
	internal RectTransform CreateItem(int index)
	{
		GameObject ret;
		if (_returnItems.Count > 0)
		{
			ret = _returnItems[_returnItems.Count - 1];
			_returnItems.RemoveAt(_returnItems.Count - 1);
		}
		else
		{
			ret = Instantiate(itemTemplate, transform);
		}

		if (ret != null)
		{
			ret.hideFlags = HideFlags.None;
			ret.transform.SetParent(transform, false);
			ret.SetActive(true);
			var item = ret.GetComponent<KUIWidget>();
			if (item)
			{
				item.index = index;
				item.SetData(GetItemData(index));
			}
			return ret.GetComponent<RectTransform>();
		}
		return null;
	}
	/// <summary>
	/// 创建物品
	/// </summary>
	/// <param name="index"></param>
	/// <returns></returns>
	internal KUIWidget CreateItem(bool active)
	{
		GameObject ret;
		if (_returnItems.Count > 0)
		{
			ret = _returnItems[_returnItems.Count - 1];
			_returnItems.RemoveAt(_returnItems.Count - 1);
		}
		else
		{
			ret = Instantiate(itemTemplate, transform);
		}

		if (ret != null)
		{
			ret.hideFlags = HideFlags.None;
			ret.transform.SetParent(transform, false);
			ret.SetActive(active);
			var item = ret.GetComponent<KUIWidget>();
			if (item)
			{
				return item;
			}
		}
		return null;
	}
	public T GetItem<T>() where T : KUIWidget
	{
		return (T)CreateItem(true);
	}
	/// <summary>
	/// 
	/// </summary>
	/// <param name="item"></param>
	internal void ReturnItem(Transform item)
	{
		item.SetParent(transform.parent, false);
		item.gameObject.SetActive(false);
		item.gameObject.hideFlags = HideFlags.HideInHierarchy;
		_returnItems.Add(item.gameObject);
	}

	/// <summary>
	/// 获得指定数据
	/// </summary>
	/// <param name="index"></param>
	/// <returns></returns>
	public object GetItemData(int index)
	{
		int count = _itemDatas.Count;
		if (loop)
		{
			index = index % count;
		}
		if (index >= 0 && index < count)
		{
			return _itemDatas[index];
		}
		return null;
	}

	public ArrayList GetItemDatas()
	{
		return _itemDatas;
	}

	public void SetItemDatas(ICollection dataList)
	{
		_itemDatas.Clear();
		if (dataList != null && dataList.Count > 0)
		{
			_itemDatas.AddRange(dataList);
		}
	}

	/// <summary>
	/// 附加数据
	/// </summary>
	/// <param name="data"></param>
	public void AddItemData(object data)
	{
		_itemDatas.Add(data);
	}

	/// <summary>
	/// 附加数据
	/// </summary>
	/// <param name="dataList"></param>
	public void AddItemDatas(ICollection dataList)
	{
		_itemDatas.AddRange(dataList);
	}

	public void RefreshItems()
	{
		for (int i = transform.childCount - 1; i >= 0; i--)
		{
			var item = transform.GetChild(i).GetComponent<KUIWidget>();
			if (item)
			{
				if (item.index < _itemDatas.Count)
					item.SetData(_itemDatas[item.index]);
				//item.SetData(item.data);
			}
		}
	}
}