package sis;

import java.text.DecimalFormat;
import java.util.Scanner;


public class Main {

    static Scanner console = new Scanner(System.in);
    static Scanner consoleDouble = new Scanner(System.in);
    static DecimalFormat numberFormat = new DecimalFormat("#.000");
    public static void main(String[] args) throws InterruptedException {

        String loginUname;
        String loginPword;
        String[] uname = new String[1000];
        String[] pword = new String[1000];
        String[] name = new String[1000];
        String[] bday = new String[1000];
        String choice;
        double computation;
        double[][] subjects = new double[1000][5];
        int x=0, y=0, z=0;
        boolean login = false, exit = false;

        do{
            do{
                System.out.printf("Do you want to [L]ogin or [S]ignup?: ");
                choice = console.next();
                choice = choice.toLowerCase();
            }while(!choice.equals("l")&&!choice.equals("s"));

            if (choice.equals("s")){
                System.out.println("Enter Login Details");
                System.out.printf("Enter Username: ");
                uname[z] = console.next();
                System.out.printf("Enter Password: ");
                pword[z] = console.next();
                System.out.printf("Enter your Full Name: ");
                name[z] = console.next();
                System.out.printf("Enter Birthday in Month/Day/Year: ");
                bday[z] = console.next();

                System.out.printf("Enter Grade for Programming (2 Units): ");
                subjects[z][0] = consoleDouble.nextDouble();
                System.out.printf("Enter Grade for Computing (3 Units): ");
                subjects[z][1] = consoleDouble.nextDouble();
                System.out.printf("Enter Grade for UTS (3 Units): ");
                subjects[z][2] = consoleDouble.nextDouble();
                System.out.printf("Enter Grade for STS (3 Units): ");
                subjects[z][3] = consoleDouble.nextDouble();
                System.out.printf("Enter Grade for PE (2 Units): ");
                subjects[z][4] = consoleDouble.nextDouble();
                z++;
            }
            else if (choice.equals("l")){
                System.out.println("Enter Login Details");
                System.out.printf("Enter Username: ");
                loginUname = console.next();
                for(x=0;x<1000;x++){
                    if (loginUname.equals(uname[x])){
                        x=y;
                    }
                }
                System.out.printf("Enter Password: ");
                loginPword = console.next();
                if (loginPword.equals(pword[y])){
                    login = true;
                }
            }

            if (login == true){
                System.out.println("Name: \t"+name[y]);
                System.out.println("Birthday: \t"+bday[y]);
                System.out.println("Grades");
                System.out.println("Programming: \t"+subjects[y][0]);
                System.out.println("Computing: \t"+subjects[y][1]);
                System.out.println("UTS: \t\t"+subjects[y][2]);
                System.out.println("STS: \t\t"+subjects[y][3]);
                System.out.println("PE: \t\t"+subjects[y][4]);
                computation = ( ((subjects[y][0]*2)+(subjects[y][1]*3)+(subjects[y][2]*3)
                        +(subjects[y][3]*3)+(subjects[y][4]*2)) / 13 );
                System.out.print("GWA: \t"+numberFormat.format(computation));
            }

            do{
                System.out.printf("Do you want to exit? [Y]es / [N]o?: ");
                choice = console.next();
                choice = choice.toLowerCase();
            }while(!choice.equals("y")&&!choice.equals("n"));
            if (choice.equals("y"))
                exit=true;
        }while(exit==false);
    }
}