package CourseRegistrationStarter;
import java.util.Scanner;

public class Main {
    static Scanner input = new Scanner(System.in);
    static Course x1 =new Course("Advanced Programming","AP1404",2);
    static Course x2 =new Course("Data Structures","DS2201",1);
    static Course x3 =new Course("Database Systems","DB3301",3);
    static RegistrationSystem n3 = new RegistrationSystem();
    static Student st = new Student("navid","41148");


    public static void main(String[] args) {
        n3.addCourseToSystem(x1);
        n3.addCourseToSystem(x2);
        n3.addCourseToSystem(x3);


        while(true){
            asli();
        }
    }
    public static boolean asli(){
        System.out.println("----Course Registration Menu ---"+"\n"+"1. Show all courses "+"\n"+"2. Register course"+"\n"+"3. Drop course"+"\n"+"4. Show my courses"+"\n"+"5. Exit"+"\n"+"Choose an option: ");
        int n1 = input.nextInt();
        if(n1 == 1){
            System.out.println("All courses in system: ");
            n3.showAllCourses();
            return (true);
        }else if (n1 ==2){
            System.out.println("Choos an option: ");
            System.out.println("1. Enter course code ");
            System.out.println("2. Enter course name ");
            int n2 = input.nextInt();
            input.nextLine();
            if (n2 == 1){
                System.out.println("Enter course code to register: ");
                String courseCode = input.nextLine();
                if(n3.findCourseByCode(courseCode) != null ){
                    if (st.addCourse(n3.findCourseByCode(courseCode))){
                        System.out.println("Registration was successful."+"\n");
                        return(true);
                    }
                }else{
                    System.out.println("No course found with this code!"+"\n");
                    return(true);
                }
            }else if (n2 == 2){
                System.out.println("Enter course name to register: ");
                String courseName = input.nextLine();
                if(n3.findCourseByName(courseName) != null ){
                    if (st.addCourse(n3.findCourseByName(courseName))){
                        System.out.println("Registration was successful."+"\n");
                        return(true);
                    }
                }else{
                    System.out.println("No course found with this name!"+"\n");
                    return(true);
                }
            }
        }else if (n1==3){
            System.out.println("Choos an option: ");
            System.out.println("1. Enter course code ");
            System.out.println("2. Enter course name ");
            int n2 = input.nextInt();
            input.nextLine();
            if (n2 == 1){
                System.out.println("Enter course code to register: ");
                String courseCode = input.nextLine();
                if(n3.findCourseByCode(courseCode) != null ){
                    if (st.dropCourse(n3.findCourseByCode(courseCode))){
                        System.out.println("Course dropped successfully."+"\n");
                        return (true);
                    }
                }else{
                    System.out.println("No course found with this code!"+"\n");
                    return(true);
                }
            }else if (n2==2){
                System.out.println("Enter course name to register: ");
                String courseName = input.nextLine();
                if(n3.findCourseByName(courseName) != null ){
                    if (st.dropCourse(n3.findCourseByName(courseName))){
                        System.out.println("Course dropped successfully."+"\n");
                        return (true);
                    }
                }else{
                    System.out.println("No course found with this name!"+"\n");
                    return(true);
                }
            }
            return (true);
        }else if (n1==4 ){
            System.out.println("Registered courses for "+ st.getName()+":");
            st.showRegisteredCourses();
            return (true);

        }else if (n1==5 ){
            System.exit(0);
            return (true);
        }
        return false;
    }
}