import java.util.Scanner;

import javax.print.DocFlavor.INPUT_STREAM;

import java.awt.im.spi.InputMethod;
import java.lang.reflect.Array;
import java.util.ArrayList;
public class Management
{
    public static void main(String[] args)
    {
        menu();
    }

    static ArrayList<Student> students = new ArrayList<Student>();
    static ArrayList<Book> books = new ArrayList<Book>();
    static ArrayList<Magazine> magazines = new ArrayList<Magazine>();
    static ArrayList<Item> items = new ArrayList<Item>();
    static ArrayList<Loan> loans = new ArrayList<Loan>();

    public static void menu()
        {
                System.out.println(
                        "[+] To Insert New Student Press: 1"+
                        "\n[+] To Insert New Book Press: 2"+
                        "\n[+] To Insert New Magazine Press: 3"+
                        "\n[+] To Insert New Loan Press: 4"+
                        "\n[+] To Delete Loan Press: 5"+
                        "\n[+] To Print Students Press: 6"+
                        "\n[+] To Print Books and Magazines Press: 7"+
                        "\n[+] To Print Loans Press: 8"+
                        "\n[+] For Exit Press: x or X"+
                        "\n[>] Insert Choice: ");

                Scanner input = new Scanner(System.in);
                String i = input.nextLine();
                if (i.equals("1"))
                {
                    System.out.println("You chose to insert a student");
                    createStudent();
                }
                else if (i.equals("2"))
                {
                    System.out.println("You chose to insert a book");
                    createBook();
                }
                else if (i.equals("3"))
                {
                    System.out.println("You chose to insert a magazine");
                    createMagazine();
                }
                else if (i.equals("4"))
                {
                    System.out.println("You chose to insert a loan");
                    createLoan();
                }
                else if (i.equals("5"))
                {
                    System.out.println("You chose to delete a loan");
                    deleteLoan();
                }
                else if (i.equals("6"))
                {
                    System.out.println("You chose to view all the students");
                    seeStudents();
                }
                else if (i.equals("7"))
                {
                    System.out.println("You chose to view all the items");
                    seeItems();
                }
                else if (i.equals("8"))
                {
                    System.out.println("You chose to view all the loans");
                    seeLoans();
                }
                else if (i.equals("x") || i.equals("X"))
                {
                    System.out.println("You chose to exit the programm");
                    System.exit(0);
                }
                else
                {
                    System.out.println("Error");
                }

        }
    public static void createStudent()
    {
        //Student myself = new Student ("Steve","Varitimou","poutsa@psoli.gr","E13025");
        //students.add(myself);
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the student's first name: ");
        String fn = input.nextLine();
        System.out.println("Enter the student's last name: ");
        String ln = input.nextLine();

        // Check if email has . and @ characters
        String email;
        do
        {
        System.out.println("Enter the student's email: ");
        email = input.nextLine();
        if (!(email.contains("@") && email.contains(".")))
        {
            System.out.println("Wrong entry");
        }

        }while (!(email.contains("@") && email.contains(".")));

        System.out.println("Enter the student's ID: ");
        String id = input.nextLine();

        if (students.size()>0) //To check if there is no entry at all
        {
            for (int i = 0; i < students.size(); i++)
            {
                if (students.get(i).getidFieldValue().toString().equals(id))
                {
                    System.out.println("The student with this ID is already added");
                    menu();
                }
                else
                {
                    Student myself = new Student (fn,ln,email,id);
                    students.add(myself);
                    System.out.println("Student created succesfully!");
                    menu();
                }
            }
        }
        else
        {
            Student myself = new Student (fn,ln,email,id);
            students.add(myself);
            System.out.println("You created the first student!");
            System.out.println("Student created succesfully!");
            menu();
        }
    }
    public static void createBook()
    {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the book's name: ");
        String title = input.nextLine();
        if (books.size()>0) //To check if there is no entry at all
        {
            for (int i = 0; i < books.size(); i++)
            {
                if (books.get(i).gettitleFieldValue().toString().equals(title))
                {
                    System.out.println("A book with this title already exists!");
                    menu();
                }
                else
                {
                    System.out.println("Enter the Publisher: ");
                    String pubnm = input.nextLine();
                    System.out.println("Enter the Publisher's adress: ");
                    String addr = input.nextLine();
                    System.out.println("Enter the Publisher's country: ");
                    String country = input.nextLine();
                    System.out.println("Enter the Publisher's city: ");
                    String city = input.nextLine();
                    Publisher pub = new Publisher(pubnm, addr, country, city);
                    System.out.println("Enter the ISBN: ");
                    int isbn = 0;
                    try {
                        isbn = Integer.parseInt(input.nextLine());
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }
                    System.out.println("Enter the Author's first name: ");
                    String fn = input.nextLine();
                    System.out.println("Enter the Author's last name: ");
                    String ln = input.nextLine();
                    System.out.println("Enter the book's price: ");
                    double pr = 0;
                    try {
                        pr = Double.parseDouble(input.nextLine());
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }
                    System.out.println("Enter the book's year: ");
                    int yr = 0;
                    try {
                        yr = Integer.parseInt(input.nextLine());
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }
                    System.out.println("Enter the book's quantity: ");
                    int qnt = 0;
                    try {
                        qnt = Integer.parseInt(input.nextLine());
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }
                    // Check if email has . and @ characters
                    String email;
                    do
                    {
                        System.out.println("Enter the author's email: ");
                        email = input.nextLine();
                        if (!(email.contains("@") && email.contains(".")))
                        {
                            System.out.println("Wrong entry");
                        }
                    }while (!(email.contains("@") && email.contains(".")));
                    // Check if gender is F or M
                    String gndr;
                    do
                    {
                        System.out.println("Enter the author's gender: (M/F) ");
                        gndr = input.nextLine();
                        if (!(gndr.equals("F") || gndr.equals("M")))
                            {
                                System.out.println("Wrong entry, please enter M or F");
                            }
                    }while (!(gndr.equals("F") || gndr.equals("M")));
                    Author auth = new Author(fn, ln, email, gndr);
                    Book myBook = new Book(pr, yr, qnt, pub, isbn, title, auth);
                    books.add(myBook);
                    items.add(myBook);
                    System.out.println("Book created succesfully!");
                    menu();

                }
            }
        }
        else
        {
            System.out.println("Enter the Publisher: ");
            String pubnm = input.nextLine();
            System.out.println("Enter the Publisher's adress: ");
            String addr = input.nextLine();
            System.out.println("Enter the Publisher's country: ");
            String country = input.nextLine();
            System.out.println("Enter the Publisher's city: ");
            String city = input.nextLine();
            Publisher pub = new Publisher(pubnm, addr, country, city);
            System.out.println("Enter the ISBN: ");
            int isbn = 0;
            try {
                isbn = Integer.parseInt(input.nextLine());
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
            System.out.println("Enter the Author's first name: ");
            String fn = input.nextLine();
            System.out.println("Enter the Author's last name: ");
            String ln = input.nextLine();
            System.out.println("Enter the book's price: ");
            double pr = 0;
            try {
                pr = Double.parseDouble(input.nextLine());
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
            System.out.println("Enter the book's year: ");
            int yr = 0;
            try {
                yr = Integer.parseInt(input.nextLine());
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
            System.out.println("Enter the book's quantity: ");
            int qnt = 0;
            try {
                qnt = Integer.parseInt(input.nextLine());
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
            // Check if email has . and @ characters
            String email;
            do
            {
                System.out.println("Enter the author's email: ");
                email = input.nextLine();
                if (!(email.contains("@") && email.contains(".")))
                {
                    System.out.println("Wrong entry");
                }
            }while (!(email.contains("@") && email.contains(".")));
            // Check if gender is F or M
            String gndr;
            do
            {
                System.out.println("Enter the author's gender: (M/F) ");
                gndr = input.nextLine();
                if (!(gndr.equals("F") || gndr.equals("M")))
                    {
                        System.out.println("Wrong entry, please enter M or F");
                    }
            }while (!(gndr.equals("F") || gndr.equals("M")));
            Author auth = new Author(fn, ln, email, gndr);
            Book myBook = new Book(pr, yr, qnt, pub, isbn, title, auth);
            books.add(myBook);
            items.add(myBook);
            System.out.println("You created the first book!");
            System.out.println("Book created succesfully!");
            menu();
        }



    }
    public static void createMagazine()

    {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the Magazine's name: ");
        String title = input.nextLine();
        if (magazines.size()>0) //To check if there is no entry at all
        {
            for (int i = 0; i < magazines.size(); i++)
            {
                if (magazines.get(i).gettitleFieldValue().toString().equals(title))
                {
                    System.out.println("A magazine with this title already exists");
                    menu();
                }
                else
                {
                    System.out.println("Enter the Publisher: ");
                    String pubnm = input.nextLine();
                    System.out.println("Enter the Publisher's adress: ");
                    String addr = input.nextLine();
                    System.out.println("Enter the Publisher's country: ");
                    String country = input.nextLine();
                    System.out.println("Enter the Publisher's city: ");
                    String city = input.nextLine();
                    Publisher pub = new Publisher(pubnm, addr, country, city);
                    System.out.println("Enter the magazine's price: ");
                    double pr = 0;
                    try {
                       pr = Double.parseDouble(input.nextLine());
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }
                    System.out.println("Enter the magazine's year: ");
                    int yr = 0;
                    try {
                        yr = Integer.parseInt(input.nextLine());
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }
                    System.out.println("Enter the magazine's issue: ");
                    int issue = 0;
                    try {
                        issue = Integer.parseInt(input.nextLine());
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }
                    System.out.println("Enter the magazine's quantity: ");
                    int qnt = 0;
                    try {
                        qnt = Integer.parseInt(input.nextLine());
                    } catch (NumberFormatException e) {
                        e.printStackTrace();
                    }

                    Magazine myMagazine = new Magazine(pr, yr, qnt, pub, issue, title);
                    magazines.add(myMagazine);
                    items.add(myMagazine);
                    System.out.println("Magazine created succesfully!");
                    menu();

                }
            }
        }
        else
        {
            System.out.println("Enter the Publisher: ");
            String pubnm = input.nextLine();
            System.out.println("Enter the Publisher's adress: ");
            String addr = input.nextLine();
            System.out.println("Enter the Publisher's country: ");
            String country = input.nextLine();
            System.out.println("Enter the Publisher's city: ");
            String city = input.nextLine();
            Publisher pub = new Publisher(pubnm, addr, country, city);
            System.out.println("Enter the magazine's price: ");
            double pr = 0;
            try {
               pr = Double.parseDouble(input.nextLine());
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
            System.out.println("Enter the magazine's year: ");
            int yr = 0;
            try {
                yr = Integer.parseInt(input.nextLine());
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
            System.out.println("Enter the magazine's issue: ");
            int issue = 0;
            try {
                issue = Integer.parseInt(input.nextLine());
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
            System.out.println("Enter the magazine's quantity: ");
            int qnt = 0;
            try {
                qnt = Integer.parseInt(input.nextLine());
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }

            Magazine myMagazine = new Magazine(pr, yr, qnt, pub, issue, title);
            magazines.add(myMagazine);
            items.add(myMagazine);
            System.out.println("You created the first magazine!");
            System.out.println("Magazine created succesfully!");
            menu();
        }


    }
    public static void createLoan()
    {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the student's ID: ");
        String id = input.nextLine();
        if (students.size()>0) //To check if there is no entry at all
        {
            for (int i = 0; i < students.size(); i++)
            {
                if (students.get(i).getidFieldValue().toString().equals(id))
                {
                    System.out.println("The student with this ID exists");
                    Student stu = students.get(i);

                    System.out.println("Enter the Book's or Magazine's title: ");
                    String title = input.nextLine();
                    if (items.size()>0) //To check if there is no entry at all
                    {
                        for (int y = 0; y < items.size(); y++)
                        {
                            if (items.get(y).gettitleFieldValue().toString().equals(title))
                            {
                                System.out.println("The title exists");
                                Item itm = items.get(y);
                                if (itm.quantityFieldValue > 0)
                                {
                                    int x = itm.quantityFieldValue;
                                    x = x-1;
                                    itm.setquantityFieldValue(x);
                                    Loan myLoan = new Loan(stu, itm);
                                    loans.add(myLoan);
                                    System.out.println("New loan added");
                                    menu();
                                }
                                else
                                {
                                    System.out.println("But the quantity is zero");
                                    menu();
                                }
                            }
                        }
                        System.out.println("There is no title with this name");
                        menu();
                    }
                    else
                    {
                        System.out.println("There are no Items, please insert items in order to loan");
                        menu();
                    }


                }

            }
            System.out.println("There is no student with this ID");
            menu();
        }
        else
        {
            System.out.println("There are no students, please insert students to provide a loan");
            menu();
        }





}
    public static void deleteLoan()
    {
        if (loans.size()>0) //To check if there is no entry at all
        {
            Scanner input = new Scanner(System.in);
            System.out.println("Enter time of loan you want to delete MM/dd/yyyy hh:mm");
            String time = input.nextLine();
            for (int i = 0; i < loans.size(); i++)
            {
                if (loans.get(i).gettimestampFieldValue().toString().equals(time))
                {
                    loans.remove(i);
                    System.out.println("A loan was deleted");
                    menu();
                }
            }
            System.out.println("No loan was found that time");
            menu();
        }
        else
        {
            System.out.println("The are no Loans");
            menu();
        }
    }
    public static void seeStudents()
    {
        if (students.size()>0) //To check if there is no entry at all
        {
            for (int i = 0; i < students.size(); i++)
            {
                String x = students.get(i).toString();
                System.out.println(x);
            }
            menu();
        }
        else
        {
            System.out.println("There are no students");
            menu();
        }
    }
    public static void seeItems()
    {
        if (items.size()>0) //To check if there is no entry at all
        {
            for (int i = 0; i < items.size(); i++)
            {
                String x = items.get(i).toString();
                System.out.println(x);
            }
            menu();
        }
        else
        {
            System.out.println("There are no items");
            menu();
        }
    }
    public static void seeLoans()
    {
        if (loans.size()>0) //To check if there is no entry at all
        {
            for (int i = 0; i < loans.size(); i++)
            {
                String x = loans.get(i).toString();
                System.out.println(x);
            }
            menu();
        }
        else
        {
            System.out.println("There are no loans");
            menu();
        }
    }