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package piexl2;
import java.io.File;
import java.io.IOException;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import java.awt.Graphics2D;
import java.awt.Image;
/**
 *
 * @author Stepan
 */
public class Piexl2 {

    /**
     * @param args the command line arguments
     */

    static BufferedImage resize(BufferedImage img, int newW, int newH) {
        Image tmp = img.getScaledInstance(newW, newH, Image.SCALE_SMOOTH);
        BufferedImage dimg = new BufferedImage(newW, newH, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2d = dimg.createGraphics();
        g2d.drawImage(tmp, 0, 0, null);
        g2d.dispose();
        return dimg;
    }

    static int get_RGB(BufferedImage img, int x, int y){
        int w = img.getWidth();
        int h = img.getHeight();
        if (x >= w || y >= h)
            return 0;
        return img.getRGB(x, y);
    }

    public static int[] full_size(BufferedImage img, int sz){
        int w = img.getWidth();
        int h = img.getHeight();
        int[] arr = new int[2];
        arr[0] = w + w % sz;
        arr[1] = h + h % sz;
        return arr;
    }
    static int abs(int a){
        if (a < 0)
            a = a * -1;
        return a;
    }
    static int get_color(int p){
        int a = (p>>24) & 0xff; ///Alpha
        int r = (p>>16) & 0xff; ///red
        int g = (p>>8) & 0xff; ///green
        int b = p & 0xff; ///blue
        double res = 0.2126 * r + 0.7152 * g + 0.0722 * b; // оттенок черного (> или < 128)
        if (res < 160)
            return 0;
        return 1;
    }

    static int[][] build_pixel_array(BufferedImage img, int x, int y){
        int[][] pixels = new int[y][x];
        for (int i = 0; i < y; i++){
            for (int j = 0; j < x; j++){
                pixels[i][j] = get_color(get_RGB(img, j, i));
                //System.out.print(pixels[i][j]);
            }
            //System.out.print('\n');
        }
        return pixels;
    }

    static int[][] build_final_array(BufferedImage img, int[][] pixels, int a, int b, int sz){
        int[][] final_ = new int[b / sz][a / sz];
        for (int j = 0; j < b; j = j + sz){
            for (int i = 0; i < a; i = i + sz){
                int rgb = 0;
                for (int y1 = 0; y1 < sz; y1++){
                    for (int x1 = 0; x1 < sz; x1++){
                        rgb += pixels[j + y1][i + x1];
                        //abs(get_RGB(img, i + x1, j + y1));
                    }
                }
                //rgb = rgb / (sz * sz);
                System.out.print(rgb + "\n");
                //System.out.print(i / sz + " " + j / sz + "\n");
                //System.out.print(get_color(rgb));
                int ans = -1;
                if (rgb < sz * sz / 2)
                    ans = 0;
                else
                    ans = 1;
                final_[j / sz][i / sz] = ans;
                System.out.print(final_[j / sz][i / sz] + "\n");

            }
        }
        return final_;
    }

    public static void main(String[] args) {

        //  reading image
        int X = 0, Y = 0;
        int[][] final1;
        BufferedImage img = null, newimg = null;
        File f = null;
        try{
            String adress_from = "c:\\stepa\\Android_projects\\Piexl2\\src\\piexl2\\Eminem.jpg";
            String adress_to = "c:\\stepa\\Android_projects\\Piexl2\\src\\piexl2\\Eminem1.jpg";
            f = new File(adress_from);
            img = ImageIO.read(f);
            int x = img.getWidth();
            int y = img.getHeight();
            newimg = resize(img, x, (int) (y / 2.8) + 1);
            X = newimg.getWidth();
            Y = newimg.getHeight();

        }catch(IOException e){
            System.out.println("Error while reading image");
        }

        int sz = 5;
        int[] arr = full_size(newimg, sz);
        int[][] pixels = build_pixel_array(newimg, arr[0], arr[1]);
        final1 = build_final_array(newimg, pixels, arr[0], arr[1], sz);

        //printnig
        System.out.print(arr[0] / sz + " " + arr[1] / sz + "\n");
        for (int i = 0; i < arr[1] / sz; i++){
            for (int j = 0; j < arr[0] / sz; j++){
                System.out.print(final1[i][j] + "");
            }
            System.out.print("\n");
        }
        System.out.print("\n\n\n\n" + X + ", " + Y + "\n");

        for (int j = 0; j < Y - 1; j++){
            for (int i = 0; i < X - 1; i++){
                System.out.print(pixels[j][i] + "");
            }
            System.out.print("\n");
        }
    }
}