package educationcenter;

import educationcenter.command.Command;
import educationcenter.model.Lesson;
import educationcenter.model.Student;
import educationcenter.model.User;
import educationcenter.storage.LessonDatabase;
import educationcenter.storage.StudentDatabase;
import educationcenter.storage.UserDatabase;

import java.util.Date;
import java.util.Random;
import java.util.Scanner;

public class EducationCenter implements Command {

    static Scanner scanner = new Scanner(System.in);
    static StudentDatabase studentDatabase = new StudentDatabase();
    static LessonDatabase lessonDatabase = new LessonDatabase();
    static UserDatabase userDatabase = new UserDatabase();
    static Random random = new Random();
    static User currentUser = null;

    public static void main(String[] args) {
        Student student = new Student("Karen", "Hovhannisyan", "04443", "mail.ru", "Manager", new Date());
        studentDatabase.addStudent(student);
        Student student1 = new Student("Artash", "Haroyan", "077698962", "art.aro@mail.ru", "Manager", new Date());
        studentDatabase.addStudent(student1);
        User user = new User(student.getName(), student.getSurname(), "login", "password", student);
        User user1 = new User(student1.getName(), student1.getSurname(), "milena", "vilena", student1);
        userDatabase.addUser(user);
        userDatabase.addUser(user1);

        boolean isRun = true;
        while (isRun) {
            System.out.println("Please input: " + EXIT + " for exit");
            System.out.println("Please input: " + LOGIN + " for login");
            int answer = Integer.parseInt(scanner.nextLine());
            switch (answer) {
                case EXIT:
                    isRun = false;
                    break;
                case LOGIN:
                    System.out.println("Please input login and password");
                    String loginAndPassword = scanner.nextLine();
                    String[] data = loginAndPassword.split(",");
                    currentUser = userDatabase.getUserByLoginAndPassword(data[0], data[1]);
                    if (currentUser == null) {
                        System.out.println("Invalid login or password");
                    } else {
                        if (currentUser.getStudent().getType().equalsIgnoreCase("manager")) {
                            managerPage();
                        } else {
                            studentPage();
                        }
                    }

            }
        }


    }

    private static void studentPage() {
        boolean isRun = true;
        while (isRun) {
            System.out.println("input " + EXIT + "for exit");
            System.out.println("Input 1 for print your lessons");
            System.out.println("Input 2 for print all lessons");
            int answer = Integer.parseInt(scanner.nextLine());
            switch (answer) {
                case EXIT:
                    isRun = false;
                    break;
                case 1:
                    printYourlesson();
                    break;
                case 2:
                    lessonDatabase.printLessons();
                    break;
            }
        }
    }


    private static void printYourlesson() {
        for (int i = 0; i < currentUser.getStudent().getLessons().length; i++) {
            System.out.println(currentUser.getStudent().getLessons()[i]);
        }
    }

    private static String[] getLoginAndPassword(String[] strings) {
        String[] loginAndPassword = new String[2];
        boolean isRun = true;
        while (isRun) {
            loginAndPassword[0] = strings[0] + (1 + random.nextInt(999));
            if (userDatabase.isLogin(loginAndPassword[0])) {
                loginAndPassword[1] = strings[1] + (1 + random.nextInt(999));
                isRun = false;
            }

        }
        return loginAndPassword;
    }

    private static void managerPage() {
        boolean isRun = true;
        while (isRun) {
            printCommand();
            int answer = Integer.parseInt(scanner.nextLine());
            switch (answer) {
                case EXIT:
                    isRun = false;
                    break;
                case ADD_STUDENT:
                    addedStudent();
                    break;
                case ADD_LESSON:
                    addedLesson();
                    break;
                case PRINT_STUDENTS:
                    studentDatabase.printStudents();
                    break;
                case PRINT_LESSONS:
                    lessonDatabase.printLessons();
                    break;
                case CHANGE_STUDENT_BY_LESSON:
                    changeStudentByLesson();
                    break;
                case PRINT_STUDENTS_BY_LESSON_NAME:
                    System.out.println("Please input lesson name");
                    String lessonName = scanner.nextLine();
                    studentDatabase.PrintStudentsByLessonName(lessonName);
                    break;
            }
        }
    }


    private static void changeStudentByLesson() {
        System.out.println("OUR STUDENTS");
        studentDatabase.printStudents();
        System.out.println("Please input stundent name");
        String name = scanner.nextLine();
        Student student = studentDatabase.getStudentByStudentName(name);
        if (student == null) {
            System.out.println("Invalid student name");
        } else {
            lessonDatabase.printLessons();
            System.out.println("Input lessons name");
            String lessonsName = scanner.nextLine();
            String[] lessonData = lessonsName.split(",");
            Lesson[] lessons = new Lesson[lessonData.length];
            for (int i = 0; i < lessonData.length; i++) {
                lessons[i] = lessonDatabase.getLessonByLessonName(lessonData[i]);
            }
            student.setLessons(lessons);
        }
    }

    private static void printCommand() {
        System.out.println("Welcome to the Education Center");
        System.out.println("Input " + EXIT + " to Exit");
        System.out.println("Input " + ADD_STUDENT + " to add student");
        System.out.println("Input " + ADD_LESSON + " to add lesson");
        System.out.println("Input " + PRINT_STUDENTS + " to print students");
        System.out.println("Input " + PRINT_LESSONS + " to print lessons");
        System.out.println("Input " + CHANGE_STUDENT_BY_LESSON + " to change student by lesson");
        System.out.println("Input " + PRINT_STUDENTS_BY_LESSON_NAME + " to print students by lesson name");
    }

    private static void addedStudent() {
        System.out.println("Please Input student name,username,phone,email,type");
        String studentData = scanner.nextLine();
        String[] studentInfo = studentData.split(",");
        lessonDatabase.printLessons();
        System.out.println("Please input Lesson name");
        String studentlessons = scanner.nextLine();
        String[] lessons = studentlessons.split(",");
        Lesson[] lessons1 = new Lesson[lessons.length];
        for (int i = 0; i < lessons.length; i++) {
            lessons1[i] = lessonDatabase.getLessonByLessonName(lessons[i]);
        }

        Student student = new Student(studentInfo[0], studentInfo[1], studentInfo[2],
                studentInfo[3], studentInfo[4], new Date(), lessons1);
        studentDatabase.addStudent(student);
        System.out.println("if you want open accaunt in Education Center");
        String answer = scanner.nextLine();
        if (answer.equalsIgnoreCase("Yes")) {
            String[] studentdata = {student.getName(), student.getSurname()};
            String[] loginAndPassword = getLoginAndPassword(studentdata);
            User user = new User(student.getName(), student.getSurname(),
                    loginAndPassword[0], loginAndPassword[1], student);
            System.out.println("Your Login is: " + loginAndPassword[0]);
            System.out.println("Your Password is: " + loginAndPassword[1]);
            userDatabase.addUser(user);
        } else {
            if (answer.equalsIgnoreCase("No")) {
                System.out.println("Thank You,You successfully Added ");
            }

        }
    }

    private static void addedLesson() {
        System.out.println("");
        System.out.println("Please input lesson name,duration,price,lecture name");
        String studentLesson = scanner.nextLine();
        String[] lessonInfo = studentLesson.split(",");
        int duration = Integer.parseInt(lessonInfo[1]);
        double price = Double.parseDouble(lessonInfo[2]);
        Lesson lesson = new Lesson(lessonInfo[0], duration, price, lessonInfo[3]);
        lessonDatabase.addLesson(lesson);
    }
}