using System;
using System.Collections.Generic;
using System.Threading;
using System.Text;


namespace OOP
{
    class Program
    {

        private static User[] Users = new User[0];
        private static Book[] Books = new Book[0];

        static void Main(string[] args)
        {
            AddUser(new User("Admin", "1234"));
            AddUser(new User("User", "12345"));
            ListUser();
            Login("User_", "12345");
            AddBook(new Book("Book1"));
            AddBook(new Book("Book2"));
            string command = "";

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

                switch (command)
                {
                    case "AddUser":
                        Console.WriteLine("Добавление пользователя. Введите имя:");
                        var n = Console.ReadLine();
                        Console.WriteLine("Введите пароль:");
                        var p = Console.ReadLine();
                        AddUser(new User(n, p));
                        Console.WriteLine("Пользователь сохранен.");

                        break;
                    case "ListUser":
                        Console.WriteLine(" Список пользователей программы:");
                        ListUser();
                        break;
                    case "Login":
                        Console.WriteLine("Авторизация: \n Введите логин:");
                        var l = Console.ReadLine();
                        Console.WriteLine("Введите пароль:");
                        var s = Console.ReadLine();
                        Login(l,s);
                        break;

                }
            }





        }


        static void AddUser(User user)
        {
            User[] tempArr = new User[Users.Length + 1];
            for (int j = 0; j < Users.Length; j++)
            {
                tempArr[j] = Users[j];
            }
            Users = tempArr;
            Users[Users.Length - 1] = user;
        }

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

        static void Login(string name, string password)
        {
            foreach (var u in Users)
            {
                if (u.Name == name)
                {
                    if (u.Checkpassword(password))
                    {
                        Console.WriteLine("Вы авторизованы!");
                        User CurrentUser = u;

                    }
                    else
                    {
                        Console.WriteLine("Вы ввели неверный пароль");
                    }

                }

            }
        }


        static void AddBook(Book book)
        {
            Book[] tempArr = new Book[Books.Length + 1];
            for (int j = 0; j < Books.Length; j++)
            {
                tempArr[j] = Books[j];
            }
            Books = tempArr;
            Books[Books.Length - 1] = book;
        }

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

        static void ChooseBook(string name)
        {
            foreach (var u in Books)
            {
                if (u.NameBook == name)
                {
                        Console.WriteLine("Книга {0} выбрана!", name);
                        Book CurrentBook = u;
                }
            }
        }
    }

    class Note
    {
        public string Message
        {
            get;
            private set;
        }

        public Note(string message)
        {
            Message = message;
        }

    }

    class Book
    {
        public string NameBook;
        static int nextId;
        public int BookId { get; private set; }


        public Book(string name)
        {
            NameBook = name;
            BookId = Interlocked.Increment(ref nextId);

        }

        private Note[] _notes;


        public void AddNote(Note note)
        {
            Note[] notes = new Note[_notes.Length + 1];
            for (int i = 0; i < _notes.Length; i++)
            {
                notes[i] = _notes[i];
            }
            _notes = notes;
            _notes[_notes.Length - 1] = note;
            GC.Collect();
        }


    }

    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;
        }

    }

}