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

namespace ConsoleApp14
{
    class Program
    {
        static void Main(string[] args)
        {
            Users users = new Users();
            users.currentUser = null;
            users.users = new User[0];
            Book book = new Book(0);
            bool logged = false;

            while (true)
            {
                Console.WriteLine("Введите команду");
                string command = Console.ReadLine();

                switch (command)
                {
                    case "AddUser":

                        users.AddUser(users.GetName(), users.GetPassword());
                        break;
                    case "Login":

                        logged = users.CheckPassword(users.GetName(), users.GetPassword());
                        if (logged)
                        {
                            Console.WriteLine("Logged in");
                        }
                        else
                        {
                            Console.WriteLine("Wrong pair");
                        }
                        break;
                    case "List":
                        users.ShowUsers();
                        break;
                }

                //залогинен
                if (logged)
                {
                    switch (command)
                    {
                        case "AddNote":
                            book.AddNote(users.currentUser);
                            break;
                        case "ShowAllNotes":
                            book.ShowAll();
                            break;
                        case "Books":
                            break;
                    }
                }
            }
        }

    }
    class Users
    {
        public User currentUser;
        public User[] users;
        public void AddUser(string name, string password)
        {
            User[] temp = new User[users.Length + 1];
            if (users.Length > 0)
            {
                for (int i = 0; i < temp.Length - 1; i++)
                {
                temp[i] = new User();
                temp[i] = users[i];
                }
            }


            temp[temp.Length - 1] = new User();
            temp[temp.Length - 1].Name = name;
            temp[temp.Length - 1].Password = password;
            users = temp;
        }
        public void ShowUsers()
        {
            for (int i = 0; i < users.Length; i++)
            {
                Console.WriteLine(users[i].Name);
            }
        }
        public bool CheckPassword(string name, string password)
        {
            for (int i = 0; i < users.Length; i++)
            {
                if (users[i].Name == name)
                {
                    if (users[i].Password == password)
                    {
                        currentUser = users[i];
                        return true;
                    }
                }
            }
            return false;

        }
        public string GetName()
        {
            Console.WriteLine("Укажите логин");
            return Console.ReadLine();
        }
        public string GetPassword()
        {
            Console.WriteLine("Укажите пароль");
            return Console.ReadLine();
        }
    }
    class User
    {
        public string Name;
        public string Password;
    }

    class Book
    {
        public int ID;
        private Note[] _notes;



        public void AddNote(User currentUser)
        {
            Console.WriteLine("Текст заметки");
            string note = Console.ReadLine();
            Note[] temp = new Note[_notes.Length + 1];
            for (int i = 0; i < _notes.Length; i++)
            {
                temp[i] = _notes[i];
            }
            temp[temp.Length - 1] = new Note();
            temp[temp.Length - 1].Text = note;
            temp[temp.Length - 1].Owner = currentUser;
            _notes = temp;
        }

        public void ShowAll()
        {
            for (int i = 0; i < _notes.Length; i++)
            {
                Console.WriteLine(_notes[i].Text);
            }
        }
        public Book(int ID)
        {
            this.ID = ID;
            _notes = new Note[0];


        }
    }

    class Note
    {
        public string Text;
        public User Owner;
    }
}