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

public class ReadMusic : MonoBehaviour
{
    public SoundFXHandler soundFXHandler;
    public MusicHandler inputMusic;

    private List<AudioSource> audioQueue = new List<AudioSource>();
    private List<AudioSource> clipsPlaying = new List<AudioSource>();
    private List<AudioSource> clipsPlayed = new List<AudioSource>();

    void Start()
    {
        soundFXHandler = FindObjectOfType<SoundFXHandler>();
        PrepSong();
        PrepSong();
        Debug.Log("Measure to go to: " + inputMusic.Measure);
        Debug.Log("Test: " + (inputMusic.Measure - 1));
    }

    void Update()
    {
        playUpTo(2);
    }

    public void PrepSong()
    {
        foreach (MusicSection section in inputMusic.Sections)
        {
            if (audioQueue.Count > 0)
                foreach (AudioSource audioSource in audioQueue)
                    if (audioSource.clip == section.ReadAudio())
                        return;

            audioQueue.Add(soundFXHandler.GetSound2DRaw(section.ReadAudio()));
        }
    }

    public void playUpTo(int measure)
    {
        foreach (AudioSource audio in clipsPlaying)
            if(!audio.isPlaying)
                audio.Play();

        if (audioQueue.Count == 0)
            PrepSong();


        if (clipsPlayed.Count >= inputMusic.Measure - 1)
        {
            Debug.Log("looping song");
            // Loop song
        }
        else
        {
            // Play song
            if (clipsPlaying.Count < 1) // Checks if clips playing list is empty
                foreach (AudioSource source in audioQueue)
                    if (clipsPlayed.IndexOf(source) < 0)
                    {
                        Debug.Log("Breaking at " + audioQueue.IndexOf(source)); // Outputs the clip that is needed to be played
                        audioQueue.Remove(source);
                        clipsPlaying.Add(source);
                        break;
                    }
                    else
                    {
                        Debug.Log("Continuing...");
                        continue; // potentially not needed
                    }
            else
                if (clipsPlaying[0].time >= (clipsPlaying[0].clip.length - 0.035f))
                    Debug.Log("Attempting to add another clip");

            foreach (MusicSection musicSection in inputMusic.Sections)
                if (musicSection.ReadAudio() == audioQueue[0].clip)
                    if (clipsPlaying[0].time >= (clipsPlaying[0].clip.length - 0.035f)) // -0.035f to get a low margin of error but allowing us to check when clip is over. We then need to subtract the ms of the next section
                    {
                        Debug.Log("something happened");
                        if (clipsPlayed.Count < inputMusic.Measure)
                        {
                            Debug.Log("Next Clip");

                            if(clipsPlaying.IndexOf(audioQueue[0]) < 0)
                                clipsPlaying.Add(audioQueue[0]);

                            if(clipsPlayed.IndexOf(clipsPlaying[0]) < 0)
                            {
                                clipsPlayed.Add(clipsPlaying[0]);
                                clipsPlaying.RemoveAt(0);
                            }
                        }
                        else
                        {
                            Debug.Log("Looping Clip");
                        }
                    }
        }
    }