using UnityEngine;
using System.Collections.Generic;

public class Pool : MonoBehaviour
{
	public GameObject[] objects;
	public int[] number;

	public List<GameObject>[] pool;

	void Start ()
	{
		instantiate();
	}

	// instantiate the pooling objects
	void instantiate ()
	{
		GameObject temp;
		pool = new List <GameObject>[objects.Length];

		for (int count = 0; count < objects.Length; count++)
		{
			pool[count] = new List<GameObject>();
			for (int num = 0; num < number[count]; num ++)
			{
				temp = (GameObject)Instantiate(objects[count]);
				temp.transform.parent = this.transform;
				pool[count].Add(temp);
			}
		}
	}

	public GameObject activate(int id)
	{
		for (int count = 0; count < pool[id].Count; count++)
		{
			if(!pool[id][count].activeSelf)
			{
				pool[id][count].SetActive(true);
				return pool[id][count];
			}
		}
		pool[id].Add((GameObject)Instantiate(objects[id]));
		pool[id][pool[id].Count - 1].transform.parent = this.transform;
		return pool[id][pool[id].Count - 1];
	}

	public GameObject activate(int id,Vector3 position, Quaternion rotation) // deactive at a specific location
	{
		for (int count = 0; count < pool[id].Count; count++)
		{
			if(!pool[id][count].activeSelf)
			{
				pool[id][count].SetActive(true);
				pool[id][count].transform.position = position;
				pool[id][count].transform.rotation = rotation;
				return pool[id][count];
			}
		}
		// Error Handling
		pool[id].Add((GameObject)Instantiate(objects[id]));
		pool[id][pool[id].Count - 1].transform.position = position;
		pool[id][pool[id].Count - 1].transform.rotation = rotation;
		pool[id][pool[id].Count - 1].transform.parent = this.transform;
		return pool[id][pool[id].Count - 1];
	}

	public void deActivate(GameObject deActivateObject)
	{
		deActivateObject.SetActive(false);
	}
}