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

public class ObjectPool
{
	public IEnumerator Init(GameObject prefab, GameObject parent, int size, int maxSize)
	{
		this.queue = new Queue<GameObject>();
		this.prefab = prefab;
		this.parent = parent;
		this.maxSize = maxSize;
		if (prefab != null)
		{
			for (int i = 0; i < size; i++)
			{
				GameObject temp = this.InsertObject();
				temp.SetActive(true);
				temp.transform.position = new Vector3(-1000f, 0f, 0f);
				yield return null;
				temp.SetActive(false);
			}
		}
		yield break;
	}

	public GameObject GetObject()
	{
		if (this.queue.Count == 0)
		{
			return this.InsertObject();
		}
		if (this.queue.Peek() == null)
		{
			this.queue.Dequeue();
			return this.InsertObject();
		}
		if (this.queue.Peek().activeSelf && this.queue.Count < this.maxSize)
		{
			return this.InsertObject();
		}
		GameObject gameObject = this.queue.Dequeue();
		this.queue.Enqueue(gameObject);
		if (this.queue.Count >= this.maxSize)
		{
			gameObject.SetActive(false);
		}
		return gameObject;
	}

	public GameObject InsertObject()
	{
		GameObject gameObject = UnityEngine.Object.Instantiate<GameObject>(this.prefab, Vector3.zero, Quaternion.identity);
		gameObject.name = this.prefab.name;
		if (this.parent != null)
		{
			gameObject.transform.parent = this.parent.transform;
		}
		gameObject.SetActive(false);
		this.queue.Enqueue(gameObject);
		return gameObject;
	}

	public Queue<GameObject> queue;

	public GameObject prefab;

	public GameObject parent;

	public int maxSize = 10;
}