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

public class AudioFader : MonoBehaviour
{
    public AudioSource audioSource;
    public float fadeDuration = 1.0f;
    float targetVolume;

    private void Awake()
    {
        targetVolume = audioSource.volume;
    }

    // Call this method to fade in the audio
    public void FadeIn()
    {
        print("Fades in audio");
        StartCoroutine(FadeAudio(true));
    }

    // Call this method to fade out the audio
    public void FadeOut()
    {
        print("Fades out audio");
        StartCoroutine(FadeAudio(false));
    }

    // Call this method to fade out the audio
    public void FadeOutWithNewTargetVolume(float newTargetVolume)
    {
        print("Fades out audio");
        StartCoroutine(FadeAudioWithNewTargetVolume(false, newTargetVolume));
    }

    IEnumerator FadeAudio(bool fadeIn)
    {
        float startVolume = fadeIn ? 0.0f : targetVolume;
        float endVolume = fadeIn ? targetVolume : 0.0f;
        float currentTime = 0.0f;

        while (currentTime < fadeDuration)
        {
            currentTime += Time.deltaTime;
            audioSource.volume = Mathf.Lerp(startVolume, endVolume, currentTime / fadeDuration);
            yield return null;
        }

        // Ensure the final volume is set to the desired value to avoid rounding errors
        audioSource.volume = endVolume;
        if (fadeIn == false)
        {
            audioSource.Stop();
        }
        // If you want to stop the audio when fading out, you can uncomment the line below
        // if (!fadeIn) audioSource.Stop();
    }

    IEnumerator FadeAudioWithNewTargetVolume(bool fadeIn, float newTargetVolume)
    {
        float startVolume = fadeIn ? 0.0f : newTargetVolume;
        float endVolume = fadeIn ? newTargetVolume : 0.0f;
        float currentTime = 0.0f;

        while (currentTime < fadeDuration)
        {
            currentTime += Time.deltaTime;
            audioSource.volume = Mathf.Lerp(startVolume, endVolume, currentTime / fadeDuration);
            yield return null;
        }

        // Ensure the final volume is set to the desired value to avoid rounding errors
        audioSource.volume = endVolume;
        if (fadeIn == false)
        {
            audioSource.Stop();
        }
        // If you want to stop the audio when fading out, you can uncomment the line below
        // if (!fadeIn) audioSource.Stop();
    }
}