import krister.Ess.*;

AudioChannel myChannel;
FFT myFFT;

float vol;

int bufferSize;
int bufferDuration;

void setup() {
  size(400, 400);

  // start up Ess
  
  Ess.start(this);

  myChannel=new AudioChannel("levan.mp3");
  
  bufferSize=myChannel.buffer.length;
  bufferDuration=myChannel.ms(bufferSize);

  myFFT=new FFT(512);

  frameRate(30);
  background(0);
  noSmooth();
}

void draw() {
  //background(0,0,255);
  fill(0,20);
  rect(0, 0, width, height);
  fill(255);
  drawSpectrum();
  //drawSamples();
}

void drawSpectrum() {
  noStroke();
  vol = 0;
  myFFT.getSpectrum(myChannel);

  for (int i=0; i<256; i++) {
    float temp=max(0,185-myFFT.spectrum[i]*175);
    //rect(i,temp+.5,1,height-temp+.5);
    //ellipse(i, 0, (185/temp)*40, (185/temp)*40);
    vol+=myFFT.spectrum[i];
   
  }
  
  if (vol <= 0.2) 
  {
    //fill (240, 68, 223);
    fill (46, 170, 66);
  } 
  else if(vol <= 0.6) {
    //fill (240, 231, 65);
   fill (250, 68, 156);
  }
  else if(vol <= 1.0) {
    //fill(65, 212, 240);
     fill (23, 178, 203);
  }
  else if(vol <= 2.0) {
    //fill(65, 240, 93);
    fill (162, 255, 239);
  }
  else{
    fill(54, 204+(vol*10),232);
  }
  ellipse(random(width), random(height), vol*50, vol*50);
}


void drawSamples() {
  stroke(255);

  // interpolate between 0 and writeSamplesSize over writeUpdateTime
  int interp=(int)max(0,(((millis()-myChannel.bufferStartTime)/(float)bufferDuration)*bufferSize));

  for (int i=0;i<256;i++) {
    float left=100;
    float right=100;

    if (i+interp+1<myChannel.buffer2.length) {
      left-=myChannel.buffer2[i+interp]*75.0;
      right-=myChannel.buffer2[i+1+interp]*75.0;
    }
    println(interp);
    line(i,left,i+1,right);
  }
}

void mousePressed() {
  if (myChannel.state==Ess.PLAYING) {
    myChannel.stop();
  } 
  else {
    myChannel.play(Ess.FOREVER);
  }
}

// clean up Ess before exiting

public void stop() {
  Ess.stop();
  super.stop();
}