/**
 *
 * This a program that repeatedly presents menus to the users, ranging from 4 options
 * each with there own selection.
 *
 * Aaron Smith
 *
 */

import java.util.Scanner;

public class Project
{
    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);

        //These are my variables for the system.
        int system = 1;
        String name = "";
        double number = 0;
        double programming = 0;
        double web = 0;
        double maths = 0;
        double critical = 0;
        double operating = 0;
        double computer = 0;
        double passGrade = 40;
        int numberOfPassedModules = 0;
        int numberOfSubjects = 6;
        int numberOfFailedModules = 0;
        double highestGrade = 0;
        double lowestGrade = 0;

        while (system > 0 && system <= 4) {

            // Introducing the system
            System.out.println();
            System.out.println("Student grade system");
            System.out.println("--------------------");
            System.out.println(); //This gives a blank line

            // These all print the available options to the student
            System.out.println("     1) Enter student details");
            System.out.println("     2) Display student grades");
            System.out.println("     3) Display student statistics");
            System.out.println("     4) Display full transcript");
            System.out.println("     0) Exit system");
            System.out.println();

            System.out.print("Select an option [0-4] >>  ");
            system = sc.nextInt();
            sc.nextLine();
            System.out.println();

            switch (system) {

            // Ask the user for details
            case 1:

                System.out.println("Student grade system");
                System.out.println("--------------------");

                System.out.print("Student name: ");
                name = sc.nextLine(); //Variable is called

                System.out.print("Student number: ");
                number = sc.nextDouble();
                sc.nextLine();

                System.out.print("Programming Grade: ");
                programming = sc.nextDouble();
                sc.nextLine();

                System.out.print("Web Development Grade: ");
                web = sc.nextDouble();
                sc.nextLine();

                System.out.print("Mathematics Grade: ");
                maths = sc.nextDouble();
                sc.nextLine();

                System.out.print("Critical Thinking Grade: ");
                critical = sc.nextDouble();
                sc.nextLine();

                System.out.print("Operating Systems Grade: ");
                operating = sc.nextDouble();
                sc.nextLine();

                System.out.print("Computer Architecture Grade: ");
                computer = sc.nextDouble();
                sc.nextLine();
                break;

                // Print the student record to the screen
                case 2:

                System.out.println("Student (number):" + name + "(" + number + ")");
                System.out.println();
                System.out.println("Semester 1 Results");
                System.out.println("------------------");
                System.out.print("Programming: " + programming);
                System.out.println();
                System.out.print("Web Development: " + web);
                System.out.println();
                System.out.print("Mathematics: " + maths);
                System.out.println();
                System.out.print("Critical Thinking: " + critical);
                System.out.println();
                System.out.print("Operating Systems: " + operating);
                System.out.println();
                System.out.print("Computer Architecture: " + computer);
                break;



               // Calculate statistics based on student record using "if" statements
                case 3:

                // Programming Statistics
                if (programming > highestGrade)
                {
                    highestGrade = programming;
                }
                if (programming < lowestGrade)
                {
                    lowestGrade = programming;
                }
                if (programming >= passGrade)
                {
                    numberOfPassedModules++;
                }
                if (programming < passGrade)
                {
                    numberOfFailedModules++;
                }

                // Web Statistics
                if (web > highestGrade)
                {
                    highestGrade = web;
                }
                if (web < lowestGrade)
                {
                    lowestGrade = web;
                }
                if (web >= passGrade)
                {
                    numberOfPassedModules++;
                }
                if (web < passGrade)
                {
                    numberOfFailedModules++;
                }

                // Maths Statistics
                if (maths > highestGrade)
                {
                    highestGrade = maths;
                }
                if (maths < lowestGrade)
                {
                    lowestGrade = maths;
                }
                if (maths >= passGrade)
                {
                    numberOfPassedModules++;
                }
                if (maths < passGrade)
                {
                    numberOfFailedModules++;
                }

                // Critical Thinking Statistics
                if (critical > highestGrade)
                {
                    highestGrade = critical;
                }
                if (critical < lowestGrade)
                {
                    lowestGrade = critical;
                }
                if (critical >= passGrade)
                {
                    numberOfPassedModules++;
                }
                if (critical < passGrade)
                {
                    numberOfFailedModules++;
                }

                // Operating Systems Statistics
                if (operating > highestGrade)
                {
                    highestGrade = operating;
                }
                if (operating < lowestGrade)
                {
                    lowestGrade = operating;
                }
                if (operating >= passGrade)
                {
                    numberOfPassedModules++;
                }
                if (operating < passGrade)
                {
                    numberOfFailedModules++;
                }

                // Computer Architecture Statistics
                if (computer > highestGrade)
                {
                    highestGrade = computer;
                }
                if (computer < lowestGrade)
                {
                    lowestGrade = computer;
                }
                if (computer >= passGrade)
                {
                    numberOfPassedModules++;
                }
                if (computer < passGrade)
                {
                    numberOfFailedModules++;
                }

                // Printing out statistics;
                System.out.println("Semester 1 statistics");
                System.out.println("---------------------");
                System.out.println("Number of modules: " + numberOfSubjects);
                System.out.println("Number of passed modules: " + numberOfPassedModules);
                System.out.println("Number of failed modules: " + numberOfFailedModules);
                System.out.println("Highest Grade: " + highestGrade);
                System.out.println("Lowest Grade: " + lowestGrade);
                System.out.println("Credits achieved (max 30): " + numberOfPassedModules * 5);
                System.out.println("Your GPA is: " + numberOfPassedModules / numberOfSubjects);
                System.out.println("Your award is");
                break;

                // Print out the student record and student statistics
                case 4:
                System.out.println("------------------------------------------------------------------------------------------------");
                System.out.println("                                                              Waterford Institute of Technology ");
                System.out.println("                                                              Cork Road                         ");
                System.out.println("                                                              Waterford                         ");
                System.out.println();
                System.out.println("                                                              t: (051) 302000                   ");
                System.out.println("                                                              w: www.wit.ie                     ");
                System.out.println("                                                              e: info@wit.ie                    ");
                System.out.println();
                System.out.println("Student (number):" + name + "(" + number + ")");
                System.out.println();
                System.out.println("Semester 1 Results");
                System.out.println("------------------");
                System.out.print("Programming: " + programming);
                System.out.println();
                System.out.print("Web Development: " + web);
                System.out.println();
                System.out.print("Mathematics: " + maths);
                System.out.println();
                System.out.print("Critical Thinking: " + critical);
                System.out.println();
                System.out.print("Operating Systems: " + operating);
                System.out.println();
                System.out.print("Computer Architecture: " + computer);
                System.out.println();
                System.out.println("Semester 1 statistics");
                System.out.println("---------------------");
                System.out.println("Number of modules: " + numberOfSubjects);
                System.out.println("Number of passed modules: " + numberOfPassedModules);
                System.out.println("Number of failed modules: " + numberOfFailedModules);
                System.out.println("Highest Grade: " + highestGrade);
                System.out.println("Lowest Grade: " + lowestGrade);
                System.out.println("Credits achieved (max 30): " + numberOfPassedModules * 5);
                System.out.println("Your GPA is: " + numberOfPassedModules / numberOfSubjects);




                            //These "if" statements calculate what type of GPA has been achieved.
                            if (numberOfPassedModules / numberOfSubjects <= 40)
                            {
                                System.out.println("Fail");
                            }
                            if (numberOfPassedModules / numberOfSubjects >= 40 && numberOfPassedModules / numberOfSubjects < 50)
                            {
                                System.out.println("Pass");
                            }
                            if (numberOfPassedModules / numberOfSubjects >= 50 && numberOfPassedModules / numberOfSubjects < 60)
                            {
                                System.out.println("2.2 honours");
                            }
                            if (numberOfPassedModules / numberOfSubjects >= 60 && numberOfPassedModules / numberOfSubjects < 70)
                            {
                                System.out.println("2.1 honours");
                            }
                            if  (numberOfPassedModules / numberOfSubjects >= 70)
                            {
                                System.out.println("1st class honours");
                            }




                            System.out.println("Your award is");
                            System.out.println("------------------------------------------------------------------------------------------------");
                            break;



                            // Closes the scanner and exit the system
                            case 0:
                            sc.close();
                            System.out.println("Thank you for using the system");
            }
        }



    }
}