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

public class SoundFXHandler : MonoBehaviour
{
    public int maxSources = 25;
    public SoundFX[] sounds;
    private List<AudioSource> audioSources = new List<AudioSource>();

    private static SoundFXHandler _instance;
    public static SoundFXHandler Instance { get { return _instance; } }

    private void Awake()
    {
        if (_instance != null && _instance != this)
            Destroy(gameObject);
        else
            _instance = this;
    }

    public void PlaySound (string fxName, Vector3 location)
    {
        AudioSource audioSource = GetAudioSource();

        if (audioSource == null)
            return;

        foreach (SoundFX soundFX in sounds)
        {
            if (fxName == soundFX.name)
            {
                audioSource.transform.position = location;
                soundFX.Attach(audioSource);
                return;
            }
        }

        Debug.LogWarning("Could not find SoundFX, \"" + fxName + " \" in sounds array");
    }

    public AudioSource PlaySoundRaw(AudioClip clip, Vector3 location)
    {

        AudioSource audioSource = GetAudioSource();

        if (audioSource == null)
            return null;


        audioSource.transform.position = location;
        audioSource.spatialBlend = 1f;
        audioSource.clip = clip;
        audioSource.Play();
        return audioSource;
    }

    public void PlaySound2DRaw(AudioClip clip)
    {

        AudioSource audioSource = GetAudioSource();

        if (audioSource == null)
            return;

        audioSource.spatialBlend = 0f;
        audioSource.clip = clip;
        audioSource.Play();

    }

    public AudioSource GetSound2DRaw(AudioClip clip)
    {

        AudioSource audioSource = GetAudioSource();

        if (audioSource == null)
            return null;

        audioSource.name = clip.name;
        audioSource.spatialBlend = 0f;
        audioSource.clip = clip;

        return audioSource;

    }

    private AudioSource GetAudioSource ()
    {
        // foreach (AudioSource source in audioSources)
        // {
            // if (!source.isPlaying)
                // return source;
        // }

        if (audioSources.Count < maxSources)
        {
            GameObject newAudioSource = new GameObject();
            newAudioSource.transform.SetParent(transform);
            audioSources.Add(newAudioSource.AddComponent<AudioSource>());
            return audioSources[audioSources.Count - 1];
        }

        Debug.LogWarning("No available audio sources found and maximum number of audio sources reached.");
        return null;
    }
}

[System.Serializable]
public class SoundFX
{
    #region Initialise Variables
    [Header("FX Details")]
    public string name = "New Sound";
    public AudioClip clip = null;

    [Header("FX Settings")]
    public bool loop = false;
    [Range(0f, 1f)]
    public float volume = 1f;
    #endregion

    public SoundFX (AudioClip _clip)
    {
        clip = _clip;
    }

    public SoundFX (string _name, AudioClip _clip)
    {
        name = _name;
        clip = _clip;
    }

    public void Attach (AudioSource audioSource)
    {
        audioSource.clip = clip;
        audioSource.loop = loop;
        audioSource.volume = volume;
        audioSource.spatialBlend = 1f;

        audioSource.Play();
    }
}