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

public class EnemyMusicManager : MonoBehaviour
{
    [SerializeField] AudioFader patrolingMusic;
    [SerializeField] AudioFader chasingMusic;
    [SerializeField] AudioFader searchingMusic;
    public bool shouldUpdateMusicAtStart;
    private bool isUpdatingMusic;

    private bool shouldBeUpdatingPatrolingMusic = true;
    private bool shouldBeUpdatingChasingMusic = true;
    private bool shouldBeUpdatingSearchingMusic = true;

    private static EnemyMusicManager _instance;
    public static EnemyMusicManager GetInstance() { return _instance; }

    private void Awake()
    {
        if (!_instance)
        {
            _instance = this;
        }
    }

    private void Start()
    {
        if (shouldUpdateMusicAtStart) 
        {
            UpdateMusic();
        }
    }

    public void StopUpdatingMusic() 
    {
        isUpdatingMusic = false;
        patrolingMusic.FadeOut();
        chasingMusic.FadeOut();
        searchingMusic.FadeOut();
        //Reset bools:
        shouldBeUpdatingPatrolingMusic = true;
        shouldBeUpdatingChasingMusic = true;
        shouldBeUpdatingSearchingMusic = true;
    }

    public void UpdateMusic() 
    {
        isUpdatingMusic = true;
        StartCoroutine(EnemyMusicUpdate());
    }

    IEnumerator EnemyMusicUpdate() 
    {
        while (isUpdatingMusic)
        {
            if (MedeaDemonicEnemyBehaviour.GetInstance() != null)
            {
                if (MedeaDemonicEnemyBehaviour.GetInstance().state
                    == MedeaDemonicEnemyBehaviour.medeaState.Patroling 
                    && shouldBeUpdatingPatrolingMusic)
                {
                    patrolingMusic.audioSource.Play();
                    patrolingMusic?.FadeIn();
                    chasingMusic?.FadeOut();
                    searchingMusic?.FadeOut();
                    shouldBeUpdatingPatrolingMusic = false;
                    shouldBeUpdatingChasingMusic = true;
                    shouldBeUpdatingSearchingMusic = true;
                    print("Play patrol music");
                }
                else if (MedeaDemonicEnemyBehaviour.GetInstance().state
                   == MedeaDemonicEnemyBehaviour.medeaState.ChasePlayer 
                   && shouldBeUpdatingChasingMusic)
                {
                    chasingMusic?.audioSource.Play();
                    patrolingMusic?.FadeOut();
                    chasingMusic?.FadeIn();
                    searchingMusic?.FadeOut();
                    shouldBeUpdatingPatrolingMusic = true;
                    shouldBeUpdatingChasingMusic = false;
                    shouldBeUpdatingSearchingMusic = true;
                    print("Play chase music");
                }
                else if (MedeaDemonicEnemyBehaviour.GetInstance().state
                  == MedeaDemonicEnemyBehaviour.medeaState.SearchingForHiddenPlayer
                  && shouldBeUpdatingSearchingMusic)
                {
                    searchingMusic.audioSource.Play();
                    patrolingMusic?.FadeOut();
                    chasingMusic?.FadeOut();
                    searchingMusic?.FadeIn();
                    shouldBeUpdatingPatrolingMusic = true;
                    shouldBeUpdatingChasingMusic = true;
                    shouldBeUpdatingSearchingMusic = false;
                    print("Play searching music");
                }
                else if (PlayerDeath.GetInstance().playerIsDead 
                    || MedeaDemonicEnemyBehaviour.GetInstance().state == MedeaDemonicEnemyBehaviour.medeaState.Disabled) 
                {
                    patrolingMusic?.FadeOut();
                    chasingMusic?.FadeOut();
                    searchingMusic?.FadeOut();
                    print("Stop Enemy Music");
                }
            }

            yield return null;
        }
       
    }
}