using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.Collections.Generic;

public class ShopPanel : PopUpPanel
{

	public GameObject itemPrefab;
	public RectTransform container;

	private List<BuyItemData> dataList;
	private const int countPrePage = 10;
	private int totalPage;
	private int currentPage;
	private BuyUtil.ItemType itemType = BuyUtil.ItemType.None;

	void Awake()
	{
		currentPanel = this;
	}

	void OnDestroy()
	{
		currentPanel = null;
		HaloManager.GetInstance().SyncEquipId();
	}

	// Use this for initialization
	void OnDisable ()
	{
//		ShowItemList(itemType);
		HaloManager.GetInstance().SyncEquipId();
	}



	public void ShowItemList(BuyUtil.ItemType itemType)
	{
		if(this.itemType == BuyUtil.ItemType.Halo)
			HaloManager.GetInstance().SyncEquipId();

		this.itemType = itemType;
		if(itemType == BuyUtil.ItemType.Halo)
		{
			InitHaloData();
		}
	}

	private void InitHaloData()
	{
		HaloManager.GetInstance().RecordStartEquipId();
		HaloManager.GetInstance().RequestDataList(()=>{
			List<HaloData> list = HaloManager.GetInstance().GetDataList();
			dataList = new List<BuyItemData>();
			for(int i=0; i<list.Count; i++)
			{
				HaloData haloData = list[i];
				HaloItemData haloItemData = new HaloItemData(haloData);
				dataList.Add(haloItemData);
			}
			totalPage = dataList.Count/countPrePage;
			totalPage = Mathf.Max(1, totalPage);
			
			ShowPage(0);
		});
	}



	public void ShowPage(int page)
	{
		currentPage = NumberUtil.forceBetween(page, 0, totalPage-1);

		int start = page * countPrePage;
		for(int i=0; i<countPrePage; i++)
		{
			BuyItemData data = null;
			if(start + i < dataList.Count)
			{
				 data = dataList[i];
			}

			BuyItem item = null;
			if(i < container.transform.childCount)
			{
				item = container.transform.GetChild(i).GetComponent<BuyItem>();
			}
			else if(data != null)
			{
				GameObject itemObj = Instantiate<GameObject>(itemPrefab);
				PopUpManager.AddToMainCanvas(itemObj, container);
				item = itemObj.GetComponent<BuyItem>();
			}

			if(data == null && item != null)
			{
				item.gameObject.SetActive(false);
			}
			else if(data != null)
			{
				item.gameObject.SetActive(true);
				item.Init(data);
			}

		}
	}


//	public void OnValueChange(Vector2 pos)
//	{
//		Debuger.Log(pos);
//		scrollbar.value = 0;
//	}






	public void UpdateInfo()
	{
		for(int i=0; i<container.childCount; i++)
		{
			container.GetChild(i).GetComponent<BuyItem>().UpdatePrice();
		}
	}






	public static ShopPanel currentPanel;
	public static ShopPanel Show()
	{
		if(currentPanel != null)
		{
			PopUpManager.AddToMainCanvas(currentPanel.gameObject);
			return currentPanel;
		}

		GameObject panelObj = GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("Prefabs/UI/Shop/ShopPanel"));
		panelObj.GetComponent<ShopPanel>();
		PopUpManager.AddToMainCanvas(panelObj);
		return currentPanel;
	}

	public static void Hide()
	{
		if(currentPanel != null)
			currentPanel.Close();
	}

	public static void Refresh()
	{
		if(currentPanel != null)
		{
			currentPanel.UpdateInfo();
		}
	}
}