Main.java

package com.generation;

import com.generation.model.Course;
import com.generation.model.Student;
import com.generation.service.StudentService;
import com.generation.service.CourseService;
import com.generation.utils.PrinterHelper;

import java.text.ParseException;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws ParseException {
        StudentService studentService = new StudentService();
        CourseService courseService = new CourseService();
        Scanner scanner = new Scanner(System.in);
        int option;
        do {
            PrinterHelper.showMainMenu();
            option = scanner.nextInt();
            switch (option) {
                case 1 -> registerStudent(studentService, scanner);
                case 2 -> findStudent(studentService, scanner);
                case 3 -> enrollStudentToCourse(studentService, courseService, scanner);
                case 4 -> showStudentsSummary(studentService);
                case 5 -> showCoursesSummary(courseService);
            }
        } while (option != 6);
    }

    private static void enrollStudentToCourse(StudentService studentService, CourseService courseService, Scanner scanner) {
        System.out.println("Insert student ID");
        String studentId = scanner.next();
        Student student = studentService.findStudent(studentId);
        if (student == null) {
            System.out.println("Invalid Student ID");
            return;
        }
        System.out.println(student);
        System.out.println("Insert course ID");
        String courseId = scanner.next();
        Course course = courseService.getCourse(courseId);
        if (course == null) {
            System.out.println("Invalid Course ID");
            return;
        }
        System.out.println(course);
        courseService.enrollStudent(courseId, student);
        studentService.enrollToCourse(studentId, course);
        System.out.println("Student with ID: " + studentId + " enrolled successfully to " + courseId);
    }

    private static void showCoursesSummary(CourseService courseService) {
        courseService.showSummary();
    }

    private static void showStudentsSummary(StudentService studentService) {
        studentService.showSummary();
    }

    private static void findStudent(StudentService studentService, Scanner scanner) {
        System.out.println("Enter student ID: ");
        String studentId = scanner.next();
        Student student = studentService.findStudent(studentId);
        if (student != null) {
            System.out.println("Student Found: ");
            System.out.println(student);
        } else {
            System.out.println("Student with Id = " + studentId + " not found");
        }
    }

    private static void registerStudent(StudentService studentService, Scanner scanner) throws ParseException {
        Student student = PrinterHelper.createStudentMenu(scanner);
        studentService.subscribeStudent(student);
    }
}