Enemy Wave & Boss Spawner

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

public class SpawnManager : MonoBehaviour
{
    public GameObject[] enemyPrefab;
    public GameObject[] powerupPrefabs;

    private float spawnRange = 9;

    public int enemyCount;
    public int waveNumber = 1;

    //boss variables
    public GameObject bossPrefab;
    public GameObject[] miniEnemyPrefabs;
    public int bossRound;

    void Start()
    {//calls the spawns enemy method and number of enemies to spawn and spawns powerups
        int randomPowerup = Random.Range(0, powerupPrefabs.Length);
        Instantiate(powerupPrefabs[randomPowerup], GenerateSpawnPosition(), powerupPrefabs[randomPowerup].transform.rotation);
        SpawnEnemyWave(waveNumber);

    }

    // Update is called once per frame
    void Update()
    {
        enemyCount = FindObjectsOfType<Enemy>().Length;
        if (enemyCount == 0)
        {
            SpawnEnemyWave(waveNumber);
            waveNumber++;
            if (waveNumber % bossRound == 0)
            {
                SpawnBossWave(waveNumber);
            }
            else
            {
                SpawnEnemyWave(waveNumber);
            }
            int randomPowerup = Random.Range(0, powerupPrefabs.Length);
            Instantiate(powerupPrefabs[randomPowerup], GenerateSpawnPosition(), powerupPrefabs[randomPowerup].transform.rotation);
        }
    }
    //makes rando spawn pos
    private Vector3 GenerateSpawnPosition()
    {
        float spawnPosX = Random.Range(-spawnRange, spawnRange);
        float spawnPosZ = Random.Range(-spawnRange, spawnRange);
        Vector3 randomPos = new Vector3(spawnPosX, 1, spawnPosZ);
        return randomPos;
    }

   void SpawnBossWave(int currentRound)
    {
        int miniEnemysToSpawn;
        //we don't want to divide by 0
        if (bossRound != 0)
        {
            miniEnemysToSpawn = currentRound / bossRound;
        }
        else
        {
            miniEnemysToSpawn = 1;
        }

        var boss = Instantiate(bossPrefab, GenerateSpawnPosition(), bossPrefab.transform.rotation);
        boss.GetComponent<Enemy>().miniEnemySpawnCount = miniEnemysToSpawn;
    }

    public void SpawnMiniEnemy (int amount)
    {
        for(int i = 0; i < amount; i++)
        {
            int randomMini = Random.Range(0, miniEnemyPrefabs.Length);
            Instantiate(miniEnemyPrefabs[randomMini], GenerateSpawnPosition(), miniEnemyPrefabs[randomMini].transform.rotation);
        }
    }
    //spawns enemies increasing by one each wave
    void SpawnEnemyWave(int enemiesToSpawn)
{
    for (int i = 0; i < enemiesToSpawn; i++)
    {
        // Instantiate(enemyPrefab, GenerateSpawnPosition(), enemyPrefab.transform.rotation);
        int randomEnemy = Random.Range(0, enemyPrefab.Length);
        Instantiate(enemyPrefab[randomEnemy], GenerateSpawnPosition(), enemyPrefab[randomEnemy].transform.rotation);
    }
}
}