using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class WaveSpawner : MonoBehaviour
{
    public static int EnemyAlive = 0;

    public Transform enemyPrefab;

    public Wave[] waves;

    public Transform spawnPoint;

    public float timeBetweenWaves = 5f;
    private float countdown = 2f;

    public Text waveCountdownText;

    private int waveIndex = 0;

    private float timeToNextSpawn = 0f;

    public GameObject[] enemies;
    int spawnedEnemies = 0;


    void Update()
    {
        if (EnemyAlive > 0)
        {
            return;
        }
        if (countdown <= 0f)
        {
            if (waveIndex > waves.Length)
            {
                SpawnRandomWave();
            }
            else
            {
            StartCoroutine(SpawnWave());
            countdown = timeBetweenWaves;
            return;
            }
        }

        countdown -= Time.deltaTime;

        countdown = Mathf.Clamp(countdown, 0f, Mathf.Infinity);

       // waveCountdownText.text = string.Format("{0:00.00}", countdown);
    }


    IEnumerator SpawnWave ()
    {
        PlayerStats.Rounds++;

        Wave wave = waves[waveIndex];

        for (int i = 0; i < wave.count; i++)
        {
            SpawnEnemy(wave.enemy);
            yield return new WaitForSeconds(1f / wave.rate);
        }
        waveIndex++;

      /*  if (waveIndex == waves.Length)
        {
            Debug.Log("Won");
            this.enabled = false;
        }*/

    }
    void SpawnEnemy(GameObject enemy)
    {
        Instantiate(enemy, spawnPoint.position, spawnPoint.rotation);
        EnemyAlive++;
    }

    void SpawnRandomWave()
    {
        timeToNextSpawn += Time.deltaTime;
        if(timeToNextSpawn > 1.0f / waveIndex)
        {
            SpawnEnemy(enemies[Random.Range(0, 3)]);
            timeToNextSpawn = 0f;
            spawnedEnemies++;
        }
        // checked spawnedEnemies against #2 spawn then start new wave.
    }
}