using UnityEngine;
using System.Collections;

[AddComponentMenu("Playground/Gameplay/Object Creator Area")]
[RequireComponent(typeof(BoxCollider2D))]
public class ObjectCreatorArea : MonoBehaviour
{
    [Header("Object creation")]

    // The object to spawn
    // WARNING: take if from the Project panel, NOT the Scene/Hierarchy!
    public GameObject prefabToSpawn;
    public GameObject prefabToSpawn1;
    public GameObject prefabToSpawn2;
    public GameObject prefabToSpawn3;

    [Header("Other options")]

    // Configure the spawning pattern
    public float spawnInterval = 1;

    private BoxCollider2D boxCollider2D;

    void Start ()
    {
        boxCollider2D = GetComponent<BoxCollider2D>();

        StartCoroutine(SpawnObject());
    }

    // This will spawn an object, and then wait some time, then spawn another...
    IEnumerator SpawnObject ()
    {
        while(true)
        {
            // Create some random numbers
            float randomX = Random.Range (-boxCollider2D.size.x, boxCollider2D.size.x) *.5f;
            float randomY = Random.Range (-boxCollider2D.size.y, boxCollider2D.size.y) *.5f;

            // Generate the new object
            float rnd = Random.value * 4f;
            int rndInt = Mathf.FloorToInt(rnd);
            GameObject newObject = null;
            switch (rndInt)
            {
                case 0: newObject = Instantiate<GameObject>(prefabToSpawn);break;
                case 1: newObject = Instantiate<GameObject>(prefabToSpawn1);break;
                case 2: newObject = Instantiate<GameObject>(prefabToSpawn2);break;
                case 3: newObject = Instantiate<GameObject>(prefabToSpawn3);break;
                default: break;
            }
            //GameObject newObject = Instantiate<GameObject>(prefabToSpawn);
            newObject.transform.position = new Vector2(randomX + this.transform.position.x, randomY + this.transform.position.y);

            // Wait for some time before spawning another object
            yield return new WaitForSeconds(spawnInterval);
        }
    }
}