/*
package csd.uoc.gr.A13;
import csd.uoc.gr.A12.MagicSquareChecker;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.JOptionPane;
import javax.swing.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

class MagicSquareCheckerFile {
    public static void main(String[] args) throws IOException {
        System.out.println("Would you like to choose a file or download one?\nPress \"1\" to choose a file or \"2\" to download a file and hit enter.");
        int choice;
        Scanner in = new Scanner(System.in);
        choice = in.nextInt();
        in.close();
        String[] all = new String[0];
        if(choice < 1 || choice > 2){
            System.out.println("Wrong input!");
            System.exit(1);
        }
        String filepath = "";
        if(choice == 1){
            JFileChooser fileChooser = new JFileChooser();
            fileChooser.setDialogTitle("Select a file");
            int userSelection = fileChooser.showSaveDialog(null);
            if (userSelection == JFileChooser.APPROVE_OPTION) {
                File file = fileChooser.getSelectedFile();
                filepath = file.getAbsolutePath();
                System.out.println("The path of the selected file is: " + filepath);
                all = fillArray(filepath);
            }
        }else {
            filepath =
                    JOptionPane.showInputDialog("The URL is: ","");
            System.out.println(filepath);
            all = downloadANDwrite(filepath);

        }

        int commas = 0;
        char c;
        int index = 0;
        ArrayList<Integer>numOfcommas = new ArrayList<>();
        for(int i=0;i<all.length;i++) {
            commas = 0;
            for (int j = 0; j < all[i].length(); j++) {
                c = all[i].charAt(j);
                if(c == ','){
                    commas++;
                }
                if(j == all[i].length()-1){
                    numOfcommas.add(index,commas);
                    index++;
                }
            }
        }

        for(int i=0;i< numOfcommas.size();i++){
            if(i <= numOfcommas.size()-2) {
                if (!numOfcommas.get(i).equals(numOfcommas.get(i + 1))) {
                    System.out.println("The structure of the matrix is not appropriate");
                    System.exit(69420);
                }
            }
        }
        int size = all.length;
        int[][] MagicSquare = new int[size][size];
        StringBuilder s1 = new StringBuilder();
        int counter = 0;
        int k;
        StringBuilder s;
        ArrayList<Integer>Numbers = new ArrayList<>();
        for (int i = 0; i < size; i++) {
            s = new StringBuilder();
            for(int j=0; j < all[i].length(); j++){
                c = all[i].charAt(j);
                if( c == ',' || c==' ' || c=='\n'){
                    int L = Integer.parseInt(s.toString());
                    Numbers.add(counter,L);
                    counter++;
                    s = new StringBuilder();
                }else{
                    s.append(c);
                    if(j == all[i].length()-1){
                        int L = Integer.parseInt(s.toString());
                        Numbers.add(counter,L);
                        counter++;
                        s = new StringBuilder();
                    }
                }
            }

        }
        counter =0;
        for(int i = 0;i<size;i++){
            for(int j =0; j<size; j++){
                MagicSquare[i][j] = Numbers.get(counter);
                counter++;
            }
        }
        for (int i = 0; i < size; i++) {
            System.out.print("-------");
        }
        System.out.print("\n");
        for (int i = 0; i < size; i++) {
            for (int j = 0; j < size; j++) {
                System.out.print("|     "+MagicSquare[i][j]);
            }
            System.out.print("| \n");
            for (int m = 0; m < size; m++) {
                System.out.print("-------");
            }
            System.out.println();
        }
        boolean check = MagicSquareChecker.checkIsMagic(MagicSquare);

        if(check){
            String newfilepath = "";
            System.out.println("The square is magic and the magic number is: " + MagicSquareChecker.getMagicNumber(MagicSquare)+".");
            JFileChooser fileChooser = new JFileChooser();
            fileChooser.setDialogTitle("Select a folder");
            fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
            int userSelection = fileChooser.showSaveDialog(null);
            if (userSelection == JFileChooser.APPROVE_OPTION) {
                File file = fileChooser.getSelectedFile();
                newfilepath = file.getAbsolutePath();
                System.out.println("The path of the selected file is: " + newfilepath);
            }
            System.out.println(newfilepath);
            PrintWriter writer;
            try {
                writer = new PrintWriter(newfilepath+"\\magic.txt","UTF-8");
                for (int i = 0; i < size; i++) {
                    writer.print("-------");
                }
                writer.println();
                for (int i = 0; i < size; i++) {
                    for (int j = 0; j < size; j++) {
                        writer.print("|     "+MagicSquare[i][j]);
                    }
                    writer.print("| \n");
                    for (int m = 0; m < size; m++) {
                        writer.print("-------");
                    }
                    writer.println();
                }
                writer.println("Magic square with magic number "+ MagicSquareChecker.getMagicNumber(MagicSquare));
                writer.close();
            } catch (Exception e) {
                System.out.println("Problem: "+e);
            }
        }else{
            System.out.println("The square isn't magic.");
        }
    }

    public static String[] fillArray(String filename) throws FileNotFoundException {
        Scanner inputFile = new Scanner(new File(filename));
        int count = 0;
        while (inputFile.hasNextLine()) {
            inputFile.nextLine();
            count++;
        }
        inputFile.close();

        String[] array = new String[count];
        inputFile = new Scanner(new File(filename));
        for (int i = 0; i < count; i++) {
            array[i] = inputFile.nextLine();
        }
        inputFile.close();
        return array;
    }

    static String[] downloadANDwrite(String address) throws IOException {
        int count = 0;
        URL url = new URL(address);
        Scanner in= new Scanner(
                new InputStreamReader(url.openStream(), StandardCharsets.UTF_8));
        while (in.hasNextLine()) {
            in.nextLine();
            count++;
        }
        in.close();
        String[] array = new String[count];
        in= new Scanner(
                new InputStreamReader(url.openStream(), StandardCharsets.UTF_8));
        for (int i = 0; i < count; i++) {
            array[i] = in.nextLine();
        }
        in.close();

        return array;
    }

}*/