using System;
using System.Threading;

namespace ConsoleApp17
{
    class Program
    {
        static void Main(string[] args)
        {
            string command = "";

            while (command != "exit")
            {
                command = Console.ReadLine();

                switch (command)
                {
                    case "AddUser":
                        Console.WriteLine("Введите имя пользователя которого хотите добавить:");
                        var name = Console.ReadLine();
                        Console.WriteLine("Придумайте пароль");
                        var password = Console.ReadLine();
                        DataBase.AddUser(new User(name,password));
                        Console.WriteLine("пользователь добавлен");
                        break;
                    case "ListUser":
                        Console.WriteLine("Список пользователей:");
                        DataBase.ListUser();
                            break;
                    case "Login":
                        Console.WriteLine("Введите логин:");
                        var login = Console.ReadLine();
                        if (DataBase.Login(login))
                        {
                            Console.WriteLine("Ведите пароль:");
                            var pas = Console.ReadLine();
                            if (DataBase.CurrentUser.CheckPassword(pas))
                            {
                                Console.WriteLine("Вы авторизованы");
                            }
                            else
                            {
                                Console.WriteLine("Вы ввели неверный пароль");
                            }
                        }
                        else
                        {
                            Console.WriteLine("Пользователя с таким логином не существует");
                        }
                        break;

                }
                if (DataBase.CurrentUser != null)
                {
                    switch (command)
                    {
                        case "AddBook":
                            Console.WriteLine("Введите название книги:");
                            DataBase.AddBook(new Book(Console.ReadLine()));
                            Console.WriteLine("Книга добавлена");
                            break;
                        case "ListBook":
                            DataBase.ListBook();
                            break;
                        case "ChooseBook":
                            Console.WriteLine("Введите название книги:");
                            var cb = Console.ReadLine();
                            if (DataBase.ChooseBook(cb))
                            {
                                Console.WriteLine("Книга выбрана");
                            }
                            else
                            {
                                Console.WriteLine("Такой книги нет");
                            }
                            break;
                        case "BoolkID":

                            break;

                    }
                }
                if (DataBase.CurrentBook != null)
                {
                    switch (command)
                    {
                        case "AddNote":
                            Console.WriteLine("Введите текст заметки");
                            DataBase.CurrentBook.AddNote(new Note(Console.ReadLine()));
                            Console.WriteLine("Заметка успешно добавлена в книгу");
                            break;
                        case "ShowAllNotes":
                            DataBase.CurrentBook.ShowAllNotes();
                            break;
                    }
                }
            }

        }
    }
    class User
    {
        public string Name { get; private set; }
        private string Password;
        public bool isLogin { get; private set; }

        public User(string name, string password, bool isLogin = false)
        {
            Name = name;
            Password = password;
        }

        public bool CheckPassword(string password)
        {
            return Password == password;
        }
    }
    class Note
    {
        public string Message
        {
            get;
            private set;
        }

        public Note(string message)
        {
            Message = message;
        }
    }
    class Book
    {
        private Note[] Notes = new Note[0];
        public string NameBook;
        public int BookId { get; private set; }
        static int nextId;
        public Book(string name)
        {
            NameBook = name;
            BookId = Interlocked.Increment(ref nextId);
        }

        public Note[] AddNote(Note note)
        {
            Note[] returnNotes = new Note[Notes.Length + 1];
            for (int i = 0; i < Notes.Length; i++)
            {
                returnNotes[i] = Notes[i];
            }
            Notes = returnNotes;
            Notes[Notes.Length - 1] = note;
            return returnNotes;
        }
        public void ShowAllNotes()
        {
            for (int i = 0; i < Notes.Length; i++)
            {
                Console.WriteLine(Notes[i].Message);
            }
        }
    }
    class DataBase
    {
        private static User[] Users = new User[0];
        public static User CurrentUser;
        private static Book[] Books = new Book[0];
        public static Book CurrentBook;


        public static User[] AddUser(User user)
        {
            User[] returnArray = new User[Users.Length + 1];
            for (int i = 0; i < Users.Length; i++)
            {
                returnArray[i] = Users[i];
            }
            Users = returnArray;
            Users[Users.Length - 1] = user;
            return returnArray;

        }

        public static void ListUser()
        {
            for (int i = 0; i < Users.Length; i++)
            {
                Console.WriteLine(Users[i].Name);
            }
        }

        public static bool Login(string name)
        {
            foreach (var u in Users)
            {
                if (u.Name == name)
                {
                    CurrentUser = u;
                    return true;
                }
            }
            return false;
        }

        public static Book[] AddBook(Book book)
        {
            Book[] returnArray = new Book[Books.Length + 1];
            for (int i = 0; i < Books.Length; i++)
            {
                returnArray[i] = Books[i];
            }
            Books = returnArray;
            Books[Books.Length - 1] = book;
            return returnArray;
        }

        public static void ListBook()
        {
            for (int i = 0; i < Books.Length; i++)
            {
                Console.WriteLine(Books[i].NameBook);
            }
        }

        public static bool ChooseBook(string name)
        {
            foreach (var item in Books)
            {
                if (item.NameBook == name)
                {
                    CurrentBook = item;
                    return true;
                }
            }
            return false;
        }

        public static void BookID()
        {
            for (int i = 0; i < Books.Length; i++)
            {
                Console.WriteLine(Books[i].BookId);
            }
        }

    }

}