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

public class SongManager : MonoBehaviour
{
    float songPosition, songPosInBeats, secPerBeat, dsptimesong;
    public float bpm;
    public int nextIndex = 0;
    public float spawnX;
    public float hitRange;
    public RBM rbm;
    public GameObject instance;
    public GameObject upArrowNote, downArrowNote, leftArrowNote, rightArrowNote;

    //array is used to tell the game what beat to spawn each note on
    float[] notes = new float[137] { 1f, 1.666f, 2f, 2.666f, 3f, 3.666f, 4, 4.666f, //measure one
    5f, 5.666f, 6f, 6.666f, 7f, 7.666f, 8f, //measure two
    9f, 9.666f, 10f, 10.666f, 11f, 11.666f, 12f, 12.666f, //measure three
    13f, 13.666f, 14f, 14.666f, 15f, 15.666f, 16,  //measure four
    17f, 18f, 18.666f, 19f, 20f, //measure five
    21f, 22f, 23f, 23.666f, 24f, //measure six
    25f, 26f, 26.666f, 27f, 28f, //measure seven
    29f, 30f, 31f, 31.666f, 32f, //measure eight
    33f, 33.666f, 34f, 34.666f, 35f, 35.666f, 36f, 36.666f, //measure nine
    37f, 37.666f, 38f, 38.666f, 39f, 39.666f, 40f, //measure ten
    41f, 41.666f, 42f, 42.666f, 43f, 43.666f, 44f, 44.666f, //measure eleven
    45f, 45.666f, 46f, 46.666f, 47f, 47.666f, 48f, //measure twelve
    49f, 49.666f, 50f, 50.666f, 51f, 51.666f, 52f, 52.666f, //measure thirteen
    53f, 53.666f, 54f, 54.666f, 55f, 55.666f, 56, //measure fourteen
    57f, 57.666f, 58f, 58.666f, 59f, 59.666f, 60f, 60.666f, //measure fifteen
    61f, 61.666f, 62f, 62.666f, 63f, 63.666f, 64f, //measure sixteen
    65f,66f, 66.666f, 67f, 68f, //measure seventeen
    69, 70f, 71f, 71.666f, 72f, //measure eighteen
    73f, 74f, 74.666f, 75f, 76f, //measure nineteen
    77f, 78f, 79f, 79.666f, 80f, //measure twenty
    81f, 81.666f, 82f, 82.666f, 83f, 83.666f, 84f //measure twentyone
    };

    //array is used to tell whether each note is up, down, left, or right
    //up = 1 down = 2 left = 3 right = 4
    public int [] whichNote = new int[137] {4, 3, 3, 4, 2, 3, 1, 2, //measure one
    4, 2, 3, 2, 3, 2, 2, //measure two
    4, 3, 3, 4, 2, 3, 1, 2, // measure three
    4, 2, 3, 2, 3, 3, 2, //measure four
    2, 2, 1, 1, 2, //measure five
    1, 2, 3, 3, 3, //measure six
    2, 2, 1, 1, 2, //measure seven
    1, 2, 3, 3, 3, //measure eight
    1, 4, 3, 1, 1, 2, 3, 1, //measure nine
    3, 4, 3, 4, 2, 3, 1, //measure ten
    1, 2, 3, 4, 2, 3, 2, 2, //measure eleven
    4, 2, 3, 2, 2, 3, 1, //measure twelve
    4, 3, 3, 4, 2, 3, 1, 2, // measure thirteen
    4, 2, 3, 2, 3, 2, 2, // measure fourteen
    4, 3, 3, 4, 2, 3, 1, 2, //measure fifteen
    4, 2, 3, 2, 3, 2, 2, //measure sixteen
    2, 2, 1, 1, 2, //measure seventeen
    1, 2, 3, 3, 3, //measure eighteen
    2, 2, 1, 1, 2, //measure nineteen
    1, 2, 3, 3, 3, //measure twenty
    4, 2, 3, 2, 3, 2, 2, //measure twentyone
    };

    void Start()
    {
        //calculate time in seconds between beats
        secPerBeat = 60f / bpm;

        //recording time when the song starts
        dsptimesong = (float) AudioSettings.dspTime;

        //start the song

    }

    // Update is called once per frame
    void Update()
    {
        //calculate the position in seconds
        songPosition = (float)(AudioSettings.dspTime - dsptimesong);

        //calculate the position in beats
        songPosInBeats = songPosition / secPerBeat;

        //spawning notes
        if (songPosInBeats >= notes[nextIndex] && whichNote[nextIndex] == 1)
        {
            instance = Instantiate(upArrowNote, new Vector3(spawnX, whichNote[nextIndex], 0), Quaternion.identity);
            instance.GetComponent<NoteMove>().mannyBoi = rbm;

            nextIndex++;
        }
        else if (songPosInBeats >= notes[nextIndex] && whichNote[nextIndex] == 2)
        {
            instance = Instantiate(downArrowNote, new Vector3(spawnX, whichNote[nextIndex], 0), Quaternion.identity);
            instance.GetComponent<NoteMove>().mannyBoi = rbm;

            nextIndex++;
        }
        else if (songPosInBeats >= notes[nextIndex] && whichNote[nextIndex] == 3)
        {
            instance = Instantiate(leftArrowNote, new Vector3(spawnX, whichNote[nextIndex], 0), Quaternion.identity);
            instance.GetComponent<NoteMove>().mannyBoi = rbm;

            nextIndex++;
        }
        else if (songPosInBeats >= notes[nextIndex] && whichNote[nextIndex] == 4)
        {
            instance = Instantiate(rightArrowNote, new Vector3(spawnX, whichNote[nextIndex], 0), Quaternion.identity);
            instance.GetComponent<NoteMove>().mannyBoi = rbm;

            nextIndex++;
        }

    }
}