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

public class AudioManager : MonoBehaviour
{
    public static AudioManager Instance { get; private set; }

    public List<AudioSource> pooledSources;
    public AudioSource sourceToPool;
    public int amountToPool;
    [SerializeField] AudioMixerGroup sfxMixer;
    [SerializeField] AudioMixerGroup musicMixer;

    private void Awake()
    {
        Instance = this;
        audioSource = GetComponent<AudioSource>();
    }


    private void Start()
    {
        pooledSources = new List<AudioSource>();
        AudioSource tmp;
        for (int i = 0; i < amountToPool; i++)
        {
            tmp = Instantiate(sourceToPool);
            tmp.gameObject.SetActive(false);
            pooledSources.Add(tmp);
        }
    }

    public AudioSource GetPooledSource()
    {
        for (int i = 0; i < amountToPool; i++)
        {
            if (!pooledSources[i].gameObject.activeInHierarchy)
            {
                return pooledSources[i];
            }
        }
        return null;
    }

    public void playSong(string songTitle, bool loop)
    {
        if (songTitle == "")
        {
            audioSource.Stop();
        }
        audioSource.outputAudioMixerGroup = musicMixer;
        audioSource.clip = OnDemandLoader.Load<AudioClip>("Music/" + songTitle);
        audioSource.loop = loop;
        audioSource.Play();
    }
    public void stopSong()
    {
        audioSource.clip = null;
        audioSource.Stop();
    }

    public void playSound(string sound, float pitch = 1.0f)
    {
        AudioSource source = GetPooledSource();
        if(source != null)
        {
            source.outputAudioMixerGroup = sfxMixer;
            source.transform.position = this.transform.position;
            source.clip = OnDemandLoader.Load<AudioClip>("Music/Sounds/" + sound);
            source.pitch = pitch;
            source.spatialBlend = 0; // 1 = 3D, 0 = 2D.
            source.spread = 0; //0 for mono
            source.gameObject.SetActive(true);
            source.Play();
        }

    }

    public void PlayOneShotSound(string sound, float pitch = 1.0f)
    {
        AudioSource source = GetPooledSource();
        if (source != null)
        {
            source.outputAudioMixerGroup = sfxMixer;
            source.transform.position = this.transform.position;
            source.clip = OnDemandLoader.Load<AudioClip>("Music/Sounds/" + sound);
            source.pitch = pitch;
            source.spatialBlend = 0; // 1 = 3D, 0 = 2D.
            source.spread = 0; //0 for mono
            source.gameObject.SetActive(true);
            source.PlayOneShot(source.clip);
        }

    }

    public void playSound3D(string sound, Vector3 position, float pitch = 1.0f)
    {
        AudioSource source = GetPooledSource();
        if (source != null)
        {
            source.outputAudioMixerGroup = sfxMixer;
            source.transform.position = position;
            source.clip = OnDemandLoader.Load<AudioClip>("Music/Sounds/" + sound);

            bool isRocketExplosion = sound == "rocket_explosion";

            source.pitch = pitch;
            source.spatialBlend = 1; // 1 = 3D, 0 = 2D.
            source.spread = 1; //1 for full stereo surround sound.
            source.rolloffMode = isRocketExplosion ? AudioRolloffMode.Linear : AudioRolloffMode.Logarithmic;
            source.minDistance = 3.0f;
            source.maxDistance = 500.0f;
            source.gameObject.SetActive(true);
            source.Play();
        }
    }

    public void PlaySound(AudioClip clip, float pitch = 1.0f)
    {
        AudioSource source = GetPooledSource();
        if(source != null)
        {
            source.outputAudioMixerGroup = sfxMixer;
            source.clip = clip;
            source.pitch = pitch;
            source.gameObject.SetActive(true);
            source.PlayOneShot(clip);
        }
    }

    public void DisableSource(AudioSource source)
    {
        source.Stop();
        source.clip = null;
        source.spatialBlend = 0;
        source.transform.position = AudioManager.Instance.transform.position;
        source.gameObject.SetActive(false);
    }

    private AudioSource audioSource;
    private GameObject audioObject;
}