using UnityEngine;

public class AudioManager : MonoBehaviour
{
    [SerializeField] private AudioSource[] backgroundMusicSource;
    [SerializeField] private AudioSource[] soundEffectsSource;
    private int[] randomizedIndices;
    private int currentIndex = 0;

    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        RandomizeBackgroundMusicOrder();
        PlayNextBackgroundMusic();
    }

    // Update is called once per frame
    void Update()
    {

    }
    
    public void PlayBackgroundMusic(int index)
    {
        if (index < 0 || index >= backgroundMusicSource.Length)
        {
            Debug.LogWarning("Invalid background music index.");
            return;
        }
        backgroundMusicSource[index].Play();
    }

    private void RandomizeBackgroundMusicOrder()
    {
        randomizedIndices = new int[backgroundMusicSource.Length];
        for (int i = 0; i < backgroundMusicSource.Length; i++)
        {
            randomizedIndices[i] = i;
        }
        // Shuffle the array
        for (int i = randomizedIndices.Length - 1; i > 0; i--)
        {
            int randomIndex = Random.Range(0, i + 1);
            int temp = randomizedIndices[i];
            randomizedIndices[i] = randomizedIndices[randomIndex];
            randomizedIndices[randomIndex] = temp;
        }
    }

    private void PlayNextBackgroundMusic()
    {
        if (backgroundMusicSource.Length == 0) return;

        backgroundMusicSource[randomizedIndices[currentIndex]].Play();
        currentIndex++;

        if (currentIndex >= randomizedIndices.Length)
        {
            currentIndex = 0;
            RandomizeBackgroundMusicOrder();
        }

        // Schedule the next track to play after the current one finishes
        float clipLength = backgroundMusicSource[randomizedIndices[currentIndex]].clip.length;
        Invoke(nameof(PlayNextBackgroundMusic), clipLength);
    }
}