//Program written by - Student 216110115//
import java.util.*;
import java.lang.Math;
import java.io.*;

public class grading_system {

	//These are individual variables to store other things
	static String student_name;
	static int student_id;
	static int subject_no;
	static String subject_input_text;
	static int subject_input_string;

  //Variables for the grade percentages
  static float assignment_multi = 20.0F;
  static float attendance_multi = 10.0F;
  static float project_multi = 15.0F;
  static float midterm_multi = 25.0F;
  static float finalexam_multi = 30.0F;

  //Variables used to store the average
  static float assignment_average;
  static float attendance_average;
  static float project_average;
  static float midterm_average;
  static float finalexam_average;

	//Variables to represent user choices
	static int main_menu_choice = 0;

	public static void main(String[] args) {
		//in the main loop, if the user presses 1, go to grade output function, if the user presses 2, go to grade input function
		System.out.print("Select what you wish to do? (type 1 or 2) \n1. View grade results. \n2. Write grade results");
		if (main_menu_choice <= 3)
		{
			main_menu();
		}
		else if (main_menu_choice >= 0);
		{
			main_menu();
		}

	}

	public static void main_menu() {
		Scanner menu_choice = new Scanner(System.in);
		main_menu_choice = menu_choice.nextInt();
		if (main_menu_choice == 1)
		{
			view_grade();
		}
		else if (main_menu_choice == 2)
		{
			grade_input();
		}
	}


	public static void grade_input() {
		//get the student name
		Scanner console_studentname = new Scanner(System.in);
		System.out.println("Write down the name of this student: ");
		student_name = console_studentname.next();

		//Get the student's ID number
		System.out.println("Please enter the student's ID number: ");
		student_id = console_studentname.nextInt();

		//get the number of s ubjects
		Scanner console_subjectno = new Scanner(System.in);
		System.out.println("Write down the number of subjects the student takes");
		subject_no = console_subjectno.nextInt();

		/*Initialize the array, on the horizontal we have got the individual grades for
		each subject on the vertical we have got the individual subjects*/
		Object[][] Student_Scores = new Object [12][subject_no];

		//Start to collect all the data for the array.
		for (int i = 0; i < subject_no; i++) {

			//declare all the console scanners
			Scanner console_subject_name = new Scanner(System.in);
			Scanner console_assignment_grade = new Scanner(System.in);

			//The subject's name
			System.out.println("What is the name of this subject?");
			subject_input_text = console_subject_name.next();
			Student_Scores[0][i] = subject_input_text;

			//Collect the attendance score
			System.out.println("What was the student's attendance rate?");
			Student_Scores[1][i] = console_assignment_grade.nextInt();

			//Collect the assignment score
			System.out.println("What was the student's score for this assignment?");
			Student_Scores[2][i] = console_assignment_grade.nextInt();

			//Collect project grade
			System.out.println("What was the student's grade for the project?");
			Student_Scores[3][i] = console_assignment_grade.nextInt();

			//Collect midterm grade
			System.out.println("What was the student's grade for the midterm exams?");
			Student_Scores[4][i] = console_assignment_grade.nextInt();

			//Collect final exam grade
			System.out.println("What was the student's grade for the final exams?");
			Student_Scores[5][i] = console_assignment_grade.nextInt();

			System.out.println("Subject Completed... \n");
		}

		System.out.println("All subjects have been input \nWould you like to preview the entry? (Y/N)");
		grade_output(Student_Scores);
	}

	public static void grade_output(Object[][] array_student) {
		//write to file here
		System.out.println("Please check the information you put down is correct \n");
		System.out.println("Student's name is " + student_name);
		System.out.println("Number of subjects taken this semester: " + subject_no + "\n");
		for (int i = 0; i < subject_no; i++) {
			System.out.println ("==" + array_student[0][i] + "==");
			System.out.println("Attendance rate percentage: " + array_student[1][i]);
			attendance_average = ((int)array_student[1][i] / 100F)*attendance_multi;
			System.out.println("Attendance rate average: " + attendance_average + "\n");
			System.out.println("Assignment percentage: " + array_student[2][i]);
			assignment_average = ((int)array_student[2][i] / 100F)*assignment_multi;
			System.out.println("Assignment rate average: " + assignment_average + "\n");
			System.out.println("Project rate percentage: " + array_student[3][i]);
			project_average = ((int)array_student[3][i] / 100F)*project_multi;
			System.out.println("Project rate average: " + project_average + "\n");
			System.out.println("Midterm rate percentage: " + array_student[4][i]);
			midterm_average = ((int)array_student[4][i] / 100F)*midterm_multi;
			System.out.println("Midterm rate average: " + midterm_average + "\n");
			System.out.println("Final exam rate percentage: " + array_student[5][i]);
			finalexam_average = ((int)array_student[5][i] / 100F)*finalexam_multi;
			System.out.println("Final exam rate average: " + finalexam_average + "\n");
			System.out.println("Total Average: " + (attendance_average + assignment_average + project_average));
			System.out.println("\n");
		}
		System.out.println("Is the information you typed correct? (Y/N)");
		File file = new File(student_name + ".txt");

	}

	public static void view_grade() {
		//read a file from here
	}

}