package hs.algo.excercise2;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.PixelGrabber;

@SuppressWarnings("serial")
public class Algos2 extends Frame {

    private int W;
    private int H;
    private Image imgFile;
    private int[] imgFilePixels, imgColors, imgColorFreq;

    @Override
    public void paint(Graphics g) {
        g.drawImage(imgFile, getInsets().left, getInsets().top, this);
    }

    @Override
    public void update(Graphics g) {

        paint(g);

    }

    private int[] relinkArray(int[] a1) {
        return a1;
    }

    private void countAllColours(int[] pixels, int[] imgCol, int[] imgFreq) {
        int colorNumber = 0;
        int[] temp_colors = new int[pixels.length];
        boolean hadWeZeroYet = false;
        boolean zeroKick = false;

        for(int i = 0; i < pixels.length; i++) {
            boolean colorAlreadyThere = false;
            if (pixels[i] == 0) hadWeZeroYet = true;
            for (int k = 0; k < temp_colors.length && !colorAlreadyThere; k++) {
                if (temp_colors[k] == pixels[i]) {
                    colorAlreadyThere = true;

                    break;
                }
            }
            if (hadWeZeroYet && colorAlreadyThere && !zeroKick) {
                temp_colors[colorNumber] = pixels[i];
                colorNumber++;
                zeroKick = true;
            }
            if (!colorAlreadyThere) {
                temp_colors[colorNumber] = pixels[i];
                colorNumber++;
            }
        }

        int[] ImgColRef = new int [colorNumber];
        int[] imgFreqRef = new int [colorNumber];

        imgCol = relinkArray(ImgColRef);
        imgFreq = relinkArray(imgFreqRef);

        for(int i = 0; i < colorNumber; i++) {
            imgCol[i] = temp_colors[i];
        }

        for (int i = 0; i < colorNumber; i++) {
            for(int j = 0; j < pixels.length; j++) {
                if(imgCol[i] == pixels[j]) imgFreq[i]++;
            }
        }

        bubbleSort(imgFreq, imgCol);

        for (int i = 0; i < colorNumber; i++) {
//          int blue1 = imgCol[i] & 0x000000ff;
//          int green1 = (imgCol[i] & 0x0000ff00) >> 8;
//          int red1 = (imgCol[i] & 0x00ff0000) >> 16;
//          int alpha1 = (imgCol[i] & 0xff000000) >> 24;
            String hex = Integer.toHexString(imgCol[i]);
//          String hexstring = "#" + String.format("%02x%02x%02x%02x" , alpha1, red1, green1, blue1)  + " " + imgFreq[i];
            String hexstring = "#" + hex  + " " + imgFreq[i];
            System.out.println(hexstring);
        }

    }

    public static void bubbleSort(int[] comparable, int[] comparable2) {
        boolean changed = false;
        do {
            changed = false;
            for (int a = 0; a < comparable.length - 1; a++) {
                if (comparable[a] > comparable[a + 1]) {
                    int tmp = comparable[a];
                    comparable[a] = comparable[a + 1];
                    comparable[a + 1] = tmp;

                    int tmp2 = comparable2[a];
                    comparable2[a] = comparable2[a + 1];
                    comparable2[a + 1] = tmp2;
                    changed = true;
                }
            }
        } while (changed);
    }

    private Image openImage(String imgPath) {
        Image img = getToolkit().getImage(imgPath);

        try {
            MediaTracker mt = new MediaTracker(this);
            mt.addImage(img, 1);
            mt.waitForAll();

        } catch (InterruptedException e) { e.printStackTrace(); }

        return img;
    }

    private int[] grabPixels(Image img) {
        int[] array = new int[W*H];


        PixelGrabber grab = new PixelGrabber(img, 0, 0, W, H, array, 0, W);

        try {
            grab.grabPixels();
        } catch (InterruptedException e) { e.printStackTrace(); }

        return array;
    }

    public Algos2() {
//      imgFile = openImage("src/hs/algo/excercise2/PA221197.jpg");
        imgFile = openImage("src/hs/algo/excercise2/3973516097_83f8a5de5c_o.jpg");
        W = imgFile.getWidth(this);
        H = imgFile.getHeight(this);
        imgFilePixels = grabPixels(imgFile);
        System.out.println(W*H);

        System.out.println(imgFilePixels.length);

        int[] a1 = { 0, 5, 5, 5, 3, 3, 0, 0, 1, 2, 1, 5};
        countAllColours(imgFilePixels, this.imgColors, this.imgColorFreq);
        System.out.println(imgFilePixels.length);
        System.out.println(imgColors);

        setBounds(600, 200, W, H);
        setVisible(true);
        addWindowListener(new WindowAdapter(){
             public void windowClosing(WindowEvent we){
                    System.exit(0);
            }
        });
    }

    public static void main(String[] args) {
        new Algos2();

    }

}