using System.Collections;
using UnityEngine;

public class Spawner : MonoBehaviour {

    //GameObjects Variabes
    public GameObject Object1; // Insert cube here
    public Transform spawnBox; //gives us position, rotation,scale of spawnbox

    //Changing Variables
    public float SpawnTime = 1f;
    public int MaxNoOfObjects = 5;
    public static bool objectDestroyed = false; //global Variable

    void Start() {
        //Start Spawning objects
        StartCoroutine(spawnLoop());
    }
    
    void Update() {
        if (objectDestroyed) {
            objectDestroyed = false;
            createObj();
        }
    }

    public GameObject createObj() {
            //This function will spawn an obj

            //get random position within a space
            Vector3 randomPos = getRandomPos();

            //Instantiate(object, position, rotation, parent, instantiateInWorldSpace
            //this will spawn an object
            GameObject newObj = Instantiate(Object1, randomPos, Quaternion.identity) as GameObject;

            return newObj;
    }

    public Vector3 getRandomPos() {
        //get random position within the spawnBox

        //Spawnbox area
        float MIN_X = -spawnBox.localScale.x / 2, MAX_X = spawnBox.localScale.x / 2;
        float MIN_Y = -spawnBox.localScale.y / 2, MAX_Y = spawnBox.localScale.y / 2;
        float MIN_Z = spawnBox.position.z - (spawnBox.localScale.z / 2), MAX_Z = spawnBox.position.z + (spawnBox.localScale.z / 2);

        float x = UnityEngine.Random.Range(MIN_X, MAX_X);
        float y = UnityEngine.Random.Range(MIN_Y, MAX_Y);
        float z = UnityEngine.Random.Range(MIN_Z, MAX_Z);
        Vector3 pos = new Vector3(x, y, z);

        return pos;
    }

    private IEnumerator spawnLoop() {
        yield return new WaitForSeconds(2); //Wait for 5 seconds
        int i = 0;
        while (i < MaxNoOfObjects) {
            createObj();
            i++;

            //Wait for awhile before spawning the next object
            float randomSpawnTime = Random.Range(SpawnTime, SpawnTime * 2);
            yield return new WaitForSeconds(randomSpawnTime);
        }
    }
}