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

public class ListHelper
{

	public enum Order
	{
		ASC,
		DESC
	}

	public static void FillList<T>(Transform container, List<T> list, ItemRenderer itemRenderer, int limit = int.MaxValue, Order order = Order.ASC) 
	{
		int index = 0;
		if(list != null)
		{
			for(int i=0; i<list.Count; i++)
			{
				if (i < container.childCount) {
					ItemRenderer item = container.GetChild (i).GetComponent<ItemRenderer> ();
					item.gameObject.SetActive (true);
					item.data = list [i];
					if (order == Order.DESC)
						item.transform.SetAsFirstSibling ();
				} else {
					AddToList<T> (container, list [i], itemRenderer, limit, order);
				}
				index++;
			}
		}

		for(int i=index; i < container.childCount; i++)
		{
			container.GetChild (i).gameObject.SetActive (false);
		}
	}


	public static void AddToList<T>(Transform container, T data, ItemRenderer itemRenderer, int limit = int.MaxValue, Order order = Order.ASC)
	{
		ItemRenderer item = null;
		if (container.childCount >= limit) {
			if (order == Order.ASC)
				item = container.GetChild (0).GetComponent<ItemRenderer> ();
			else
				item = container.GetChild (container.childCount - 1).GetComponent<ItemRenderer> ();
		} else {
			item = GameObject.Instantiate<GameObject> (itemRenderer.gameObject).GetComponent<ItemRenderer> ();
			PopUpManager.AddToMainCanvas (item.gameObject, container);
		}
		item.gameObject.SetActive (true);
		if (order == Order.ASC)
			item.transform.SetAsLastSibling ();
		else
			item.transform.SetAsFirstSibling ();
		item.data = data;
	}

	public static void AddToScrollChatList<T>(Transform container, T data, ItemRenderer itemRenderer, int limit = int.MaxValue)
	{
		ItemRenderer item = container.GetChild (0).GetComponent<ItemRenderer> ();
		if (!item.gameObject.activeSelf) {
			item.transform.SetAsLastSibling ();
		} else {
			item = GameObject.Instantiate<GameObject> (itemRenderer.gameObject).GetComponent<ItemRenderer> ();
			PopUpManager.AddToMainCanvas (item.gameObject, container);
		}
		item.gameObject.SetActive (true);
		item.data = data;
	}


	public static void Remove<T>(Transform container, T data)
	{
		if (data == null)
			return;

		for(int i=0; i<container.childCount; i++)
		{
			ItemRenderer item = container.GetChild(i).GetComponent<ItemRenderer>();
			if(item.data != null && item.data.Equals(data))
			{
				item.transform.SetAsLastSibling ();
				item.gameObject.SetActive (false);
				return;
			}
		}
	}

	public static void HideAll(Transform container)
	{
		for(int i=0; i < container.childCount; i++)
		{
			container.GetChild (i).gameObject.SetActive (false);
		}
	}
}