using System;
using System.Collections.Generic;

namespace task2_2
{
    class Program
    {
        public delegate int SortDel(Book a, Book b);

        public class Book
        {
            public string Author;
            public string Name;
            public string Publish;
            public Book() { }
        }

        public class Library
        {
            private List<Book> books;
            public void Add(Book element) {
                books.Add(element);
            }
            public void Sort(Comparison<Book> funk) {
                books.Sort(funk);
            }

            public void Print() {
                foreach (var i in books)
                    Console.WriteLine("Имя автора:  " + i.Author + "\t Название творчества: " + i.Name + "\t Изадтельство: " + i.Publish);
            }
            public Library() {
                books = new List<Book>();
            }
        }

        public delegate Library Sortt(Book a, Book b);

        private static void Main(string[] args) {
            Library library = new Library();
            int? choose = null;
            library.Add(new Book() { Author = "Tom", Name = "Sity", Publish = "Vill" });
            library.Add(new Book() { Author = "Den", Name = "Volja", Publish = "Piter" });
            library.Add(new Book() { Author = "Alex", Name = "Bel", Publish = "Kot" });
            library.Add(new Book() { Author = "Robert", Name = "Nice", Publish = "Village" });
            library.Add(new Book() { Author = "John", Name = "Rockstar", Publish = "Hell" });
            library.Add(new Book() { Author = "Zee", Name = "Ko", Publish = "Waaar!" });
            library.Print();
            do
            {
                Console.WriteLine("\n1. Сортировка по имени;\n2. Сортировка по автору;\n3. Сортировка по книге;\n0 - для выхода из программы.");
                Console.Write("Выберите метод сортировки: ");
                try
                {
                    choose = Int32.Parse(Console.ReadLine());
                    switch (choose)
                    {
                        case 0:
                            Console.WriteLine("До скорых встреч!");
                            break;
                        case 1:
                            Console.Clear();
                            library.Sort(
                                delegate (Book a, Book b)
                                {
                                    return (a.Name.CompareTo(b.Name));
                                });
                            library.Print();
                            break;
                        case 2:
                            Console.Clear();
                            library.Sort(
                                delegate (Book a, Book b)
                                {
                                    return (a.Author.CompareTo(b.Author));
                                });
                            library.Print();
                            break;
                        case 3:
                            Console.Clear();
                            library.Sort(
                                delegate (Book a, Book b)
                                {
                                    return (a.Publish.CompareTo(b.Publish));
                                });
                            library.Print();
                            break;
                        default:
                            Console.WriteLine("Вы ошиблись выбором!");
                            break;
                    }
                }
                catch (FormatException)
                {
                    Console.WriteLine("Попробуйте снова!");
                }
            } while (choose != 0);
        }
        }
    }