[System.Serializable]
public class SpawnableAnimal
{
public string AnimalName;
public int spawnChance;
}

public class AnimalSpawner : MonoBehaviour {

public float maxSpawnRadius = 1000.0f;
public float noSpawnRadius = 700.0f;

public GameObject spawnedAnimal;

public SpawnableAnimal[] spawnableAnimals;

void Start () {
    System.Random rand = new System.Random();
    int randInt = rand.Next(0, 100);

    float startTime = randInt / 100;
    float repeatTime = randInt / 100;
    InvokeRepeating("ReadyToSpawn", startTime, (60.0f + repeatTime));
}

void ReadyToSpawn()
{
    Debug.Log("Ready to spawn");
    bool canSpawn = true;

    GameObject[] players = GameObject.FindGameObjectsWithTag("Player");
    GameObject[] animals = GameObject.FindGameObjectsWithTag("Animal");
    for(int i = 0; i < players.Length; i++)
    {
        if (Vector3.Distance(this.transform.position, players[i].transform.position) > maxSpawnRadius)
            canSpawn = false;

        if (Vector3.Distance(this.transform.position, players[i].transform.position) < noSpawnRadius)
            canSpawn = false;
    }

    if (players.Length < 1)
        canSpawn = false;

    if (spawnedAnimal != null)
        canSpawn = false;

    if (canSpawn)
        SpawnAnimal();
}

void SpawnAnimal()
{
    int arraySum = 0;
    int animalToSpawn = -1;
    System.Random rand = new System.Random();
    int randInt = rand.Next(0, 100);

    for(int i = 0; i < spawnableAnimals.Length; i++)
    {
        if(randInt <= spawnableAnimals[i].spawnChance && randInt > arraySum)
        {
            animalToSpawn = i;
        } else
        {
            arraySum += randInt;
        }
    }

    Debug.Log("Spawning animal: " + animalToSpawn);
    spawnedAnimal = GameObject.Find("AnimalManager").GetComponent<AnimalManager>().SpawnAnimal(spawnableAnimals[animalToSpawn].AnimalName, this.transform.position, this.transform.rotation);
    }
}