using System;
using System.Collections;
using UnityEngine;

[Serializable]
public class Music
{
    public string sceneName;
    public AudioClip clip;
}


public class MusicManager : MonoBehaviour
{
    [SerializeField] private AudioSource audioSource;

    [SerializeField] private Music[] musics;

    [SerializeField] private float transitionTime = 1f;

    [SerializeField] private float maxVolume = 1f;

    private Music currentMusic;

    private ulong RandomDelay => (ulong)UnityEngine.Random.Range(1f, 3f);


    public void GoToScene(string sceneName)
    {
        var music = Array.Find(musics, m => m.sceneName == sceneName);
        if (music == null) return;
        PlayMusic(music);
    }

    public void PlayMusic(Music newMusic)
    {
        if (currentMusic == null)
        {
            currentMusic = newMusic;
            audioSource.clip = currentMusic.clip;
            audioSource.PlayDelayed(RandomDelay);
            return;
        }

        StartCoroutine(TransitionToNewMusic(newMusic.clip));
    }
    private IEnumerator TransitionToNewMusic(AudioClip audioClip)
    {
        float timer = 0f;

        while (timer < transitionTime)
        {
            timer += Time.deltaTime;
            audioSource.volume = (1 - timer / transitionTime) * maxVolume;
            yield return null;
        }

        audioSource.clip = audioClip;
        audioSource.PlayDelayed(RandomDelay);

        timer = 0f;

        while (timer < transitionTime)
        {
            timer += Time.deltaTime;
            audioSource.volume = (timer / transitionTime) * maxVolume;
            yield return null;
        }
    }

    public void PauseMusic()
    {
        audioSource.Pause();
    }

    public void ResumeMusic()
    {
        audioSource.UnPause();
    }
}