using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Assets.Scripts.CharacterScripts;

public class BossMusicController : MonoBehaviour{
    public AudioSource music; // Reference to the general level music
    public AudioSource bossMusic; // Reference to the boss music
    public PlayerController player; // Reference to the player script
    public float fadeDuration = 2f; // Duration of fade-in and fade-out

    bool hasPlayedBossMusic = false;

    void Start(){
        // Initialize the player reference
        player = GameObject.FindGameObjectWithTag("Player").GetComponent<PlayerController>();
    }

    void OnTriggerEnter2D(Collider2D other){
        // Check if the player entered the trigger area and boss music hasn't played yet
        if (other.CompareTag("Player") && !hasPlayedBossMusic){
            hasPlayedBossMusic = true;

            // Start fading out the general background level music and fade in the boss music
            StartCoroutine(FadeOutGeneralMusicAndFadeInBossMusic());
        }
    }

    IEnumerator FadeOutGeneralMusicAndFadeInBossMusic(){
        float startVolume = music.volume;
        float fadeStep = startVolume / fadeDuration;

        // Fade out the general level music
        while (music.volume > 0){
            music.volume -= fadeStep * Time.deltaTime;
            yield return null;
        }

        // Ensure volume is set to 0
        music.volume = 0;

        // Stop the general level music
        music.Stop();

        // Start playing the boss music
        bossMusic.Play();

        // Fade in the boss music
        while (bossMusic.volume < 1){
            bossMusic.volume += fadeStep * Time.deltaTime;
            yield return null;
        }

        // Ensure volume is set to 1
        bossMusic.volume = 1;
    }
}