// Chord Test 4 by John Clavin -- August 14, 2016
// Chord Test 4 Fix by John Clavin
// August 16, 2017

var numOfOsc;
var beatCount, chordCount, chordNumber;
var fadeFlag, hiChordsFlag;
var fadeCount;
var jcOscs = [];
var jcBass;

var noteArray = [50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
                 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72];
					
function setup() {
  createCanvas(800, 400);
  background(180);
  frameRate(30);
  noStroke();
  masterVolume(0.30);
  numOfOsc = 4;
  fadeFlag = false;
  hiChordsFlag = 0;
  fadeCount = 0;
  chordCount = 0;
  chordNumber = floor(random(5, 11));
  beatCount = 1; 
  for (var i = 0; i < numOfOsc; i++) {
    jcOscs[i] = new jcOsc();
  }
  jcBass = new jcOscBass();
}

function draw() {
  if (frameCount % 30 == 15) {
    if(beatCount === 0) {
      createChord();
      chordCount++;
      if(chordCount >= chordNumber) {
        beatCount = 8;
        chordCount = 0;
        chordNumber = floor(random(5, 11));
        fadeFlag = true;
        if(random(100) > 70) {
          hiChordsFlag = 1;
        } else {
          hiChordsFlag = 0;
        }
      } else if(random(100) > 94) {
        beatCount = 0;
      } else {
        beatCount = 1;
      }
    } else {
      beatCount--;
    }
  }
  
  if(fadeFlag) {
    fadeCount++;
    if(fadeCount > 60 && fadeCount < 130 ) {
      background(180, 12);
    }
    if(fadeCount > 128 && fadeCount < 132 ) {
      background(180);
    }
    if(fadeCount > 160 && fadeCount < 220) {
      fill(130);
      rect(width/2 - width/4, height/6, width/2, 30);
    }
    if(fadeCount > 218 && fadeCount < 222 ) {
      background(180);
      fadeFlag = false;
      fadeCount = 0;
    }	
  }
}

function jcOsc() {
  this.osc = new p5.SinOsc();
  this.envlope = new p5.Env();
  this.envlope.setADSR(0.03, 0.26, 0.26, 3.8);
  this.envlope.setRange(0.40, 0);
  this.osc.amp(this.envlope);
  this.osc.start();

  this.jamOn = function(xnote) {
    this.note = xnote;
    this.freqValue = midiToFreq(this.note);
    this.osc.freq(this.freqValue);
    this.envlope.play();
  }

  this.display = function(noteDisplayIndex) {
    this.note = noteDisplayIndex;
    fill(240, 0, 0);
    this.x = map(this.note, 1, 21, 0, width);
    rect(this.x, 150, 10, 250);
  }
}

function jcOscBass() {
  this.osc1 = new p5.TriOsc();
  this.osc2 = new p5.TriOsc();
  this.envlope1 = new p5.Env();
  this.envlope2 = new p5.Env();
  this.envlope1.setADSR(0.03, 0.26, 0.20, 2.4);
  this.envlope2.setADSR(0.03, 0.26, 0.20, 2.4);
  this.envlope1.setRange(0.40, 0);
  this.envlope2.setRange(0.40, 0);
  this.osc1.amp(this.envlope1);
  this.osc2.amp(this.envlope2);
  // this.osc1.start();
  // this.osc2.start();

  this.jamOnBass = function(xnote) {
    this.note = xnote - 12;
    this.freqValue = midiToFreq(this.note);
    this.osc1.freq(this.freqValue);
    this.note = xnote - 24;
    this.freqValue = midiToFreq(this.note);
    this.osc2.freq(this.freqValue);
    this.envlope1.play();
    this.envlope2.play();
  }
}

function createChord() {
  background(180);
  if(hiChordsFlag == 1) {
    var noteIndex = floor(random(17, 21));
    var midiValue = noteArray[noteIndex];
    jcOscs[0].jamOn(midiValue);
    jcOscs[0].display(noteIndex);

    noteIndex = noteIndex - floor(random(3, 6));
    midiValue = noteArray[noteIndex];
    jcOscs[1].jamOn(midiValue);
    jcOscs[1].display(noteIndex);

    noteIndex = noteIndex - floor(random(1, 4));
    midiValue = noteArray[noteIndex];
    jcOscs[2].jamOn(midiValue);
    jcOscs[2].display(noteIndex);

    noteIndex = noteIndex - floor(random(3, 6));
    midiValue = noteArray[noteIndex];
    // jcBass.jamOnBass(midiValue);
    jcOscs[3].jamOn(midiValue);
    jcOscs[3].display(noteIndex);
  } else {
    noteIndex = floor(random(15, 19));
    midiValue = noteArray[noteIndex];
    jcOscs[0].jamOn(midiValue);
    jcOscs[0].display(noteIndex);

    noteIndex = noteIndex - floor(random(3, 6));
    midiValue = noteArray[noteIndex];
    jcOscs[1].jamOn(midiValue);
    jcOscs[1].display(noteIndex);

    noteIndex = noteIndex - floor(random(1, 4));
    midiValue = noteArray[noteIndex];
    jcOscs[2].jamOn(midiValue);
    jcOscs[2].display(noteIndex);

    noteIndex = noteIndex - floor(random(3, 6));
    midiValue = noteArray[noteIndex];
    // jcBass.jamOnBass(midiValue);
    jcOscs[3].jamOn(midiValue);
    jcOscs[3].display(noteIndex);
  }
}