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import gab.opencv.*;
import processing.video.*;
import java.awt.Rectangle;

Capture video;
OpenCV opencv;

PImage src;
ArrayList<Contour> contours;

boolean colorA, colorB, colorC, colorD;

int maxColors = 4;
int[] hues;
int[] colors;
int rangeWidth = 10;

PImage[] outputs;

int colorToChange = -1;

void setup() {
  video = new Capture(this, 640, 480);
  opencv = new OpenCV(this, video.width, video.height);
  contours = new ArrayList<Contour>();

  size(opencv.width + opencv.width/4 + 30, opencv.height, P2D);

  colors = new int[maxColors];
  hues = new int[maxColors];

  outputs = new PImage[maxColors];

  video.start();
}

void draw() {

  background(150);

  if (video.available()) {
    video.read();
  }

  opencv.loadImage(video);

  opencv.useColor();
  src = opencv.getSnapshot();

  opencv.useColor(HSB);


  image(src, 0, 0);
  for (int i=0; i<outputs.length; i++) {
    if (outputs[i] != null) {
      image(outputs[i], width-src.width/4, i*src.height/4, src.width/4, src.height/4);

      noStroke();
      fill(colors[i]);
      rect(src.width, i*src.height/4, 30, src.height/4);
    }
  }

  detectColors();


  textSize(20);
  stroke(255);
  fill(255);

  if (colorToChange > -1) {
    text("click to change color " + colorToChange, 10, 25);
  } else {
    text("press key [1-4] to select color", 10, 25);
  }


  // displayContoursBoundingBoxes();
}


void detectColors() {

  for (int i=0; i<hues.length; i++) {

    if (hues[i] <= 0) continue;

    opencv.loadImage(src);
    opencv.useColor(HSB);
    opencv.setGray(opencv.getH().clone());

    int hueToDetect = hues[i];
    opencv.inRange(hueToDetect-rangeWidth/2, hueToDetect+rangeWidth/2);

    opencv.erode();

    outputs[i] = opencv.getSnapshot();
    opencv.loadImage(outputs[i]);

    contours = opencv.findContours(true, true);
    if (outputs[i] != null) {
      opencv.loadImage(outputs[i]);
      contours = opencv.findContours(true, true);

      for (int j=0; j<contours.size (); j++) {

        Contour contour = contours.get(j);
        Rectangle r = contour.getBoundingBox();

        if ((r.width > 50 || r.height > 50) && (r.width < 200 || r.height < 200) ) {
          stroke(colors[i]);
          fill(colors[i], 150);
          strokeWeight(2);
          rect(r.x, r.y, r.width, r.height);
        }

        if ((r.x>0&&r.x<width)&&(r.y>0&&r.y<height)) {
          if (i==0) {
            println("color A");
          }
          if (i==1) {
            println("color B");
          }
          if (i==2) {
            println("color C");
          }
          if (i==3) {
            println("color D");
          }
        }
      }
    }
  }
}

void displayContoursBoundingBoxes() {

  for (int i=0; i<contours.size (); i++) {

    Contour contour = contours.get(i);
    Rectangle r = contour.getBoundingBox();

    if (r.width < 20 || r.height < 20)
      continue;

    stroke(255, 0, 0);
    fill(255, 0, 0, 150);
    strokeWeight(2);
    rect(r.x, r.y, r.width, r.height);
  }
}

void mousePressed() {

  if (colorToChange > -1) {

    color c = get(mouseX, mouseY);
    // println("r: " + red(c) + " g: " + green(c) + " b: " + blue(c));

    int hue = int(map(hue(c), 0, 255, 0, 180));

    colors[colorToChange-1] = c;
    hues[colorToChange-1] = hue;

    // println("color index " + (colorToChange-1) + ", value: " + hue);
  }
}

void keyPressed() {

  if (key == '1') {
    colorToChange = 1;
  } else if (key == '2') {
    colorToChange = 2;
  } else if (key == '3') {
    colorToChange = 3;
  } else if (key == '4') {
    colorToChange = 4;
  }
}

void keyReleased() {
  colorToChange = -1;
}