using System;
using System.Collections.Generic;


//Читатель класс
    public struct Reader
    {
        public string Name;
        public DateTime Date;

        public Reader(string name, DateTime date)
        {
            Name = name;
            Date = date;
        }
    }

    public abstract class Book
    {
        public string Title;
        public List<string> Authors;
        public int Year;
        public string Publisher;
        public int PagesCount;

        public Book(string title, List<string> authors, int year, string publisher, int pagesCount)
        {
            Title = title;
            Authors = authors;
            Year = year;
            Publisher = publisher;
            PagesCount = pagesCount;
        }

        public Book()
        {
        }
    }

    public class CatalogBook : Book
    {
        public int Id;
        public int Quantity;
        public int Instances;
        public List<Reader> Picked = new();

        public CatalogBook(int id, int quantity)
        {
            Id = id;
            Quantity = quantity;
            Instances = quantity;
            Picked = new List<Reader>();
        }

        public CatalogBook(string title, List<string> authors, int year, string publisher, int pagesCount, int id, int quantity, int instances) : base(title, authors, year, publisher, pagesCount)
        {
            Id = id;
            Quantity = quantity;
            Instances = instances;
        }

//2
        public void AddBooks(int count)
        {
            Quantity += count;
            Instances += count;
        }

        public void RemoveBooks(int count)
        {
            if (Instances > count)
            {
                Quantity -= count;
                Instances -= count;
                // return;
            }
            else
            {
                Console.WriteLine("Книг нет в наличии");
            }
        }

//5
        public void GiveBook(string name, DateTime time)
        {
            if (Instances > 0)
            {
                Instances -= 1;
                Picked.Add(new Reader(name, time));
            }
        }

//6
        public void ReturnBook(string name)
        {
            for (var i = 0; i < Picked.Count; i++)
                if (Picked[i].Name == name)
                {
                    Instances += 1;
                    Picked.Remove(Picked[i]);
                    break;
                }
        }

//7
        public void NeVernul()
        {
            for (var i = 0; i < Picked.Count; i++)
            {
                var datePicked = Picked[i].Date;
                if (DateTime.Now > datePicked.AddDays(366))
                    Console.WriteLine(Picked[i].Name + "не вернул книги в течение года");
            }
        }
    }

    public class Library
    {
        public List<CatalogBook> Catalog = new();

//1
        public void AddBook(CatalogBook book)
        {
            Catalog.Add(book);
        }

        public void RemoveBook(CatalogBook book)
        {
            if (Catalog.Contains(book)) Catalog.Remove(book);
        }

//3
        public void ShowInfo(int findX)
        {
            for (var i = 0; i < Catalog.Count; i++)
                if (Catalog[i].Id == findX)
                {
                    Console.WriteLine("Название книги " + Catalog[i].Title
                                                        + " Год выпуска " + Catalog[i].Year
                                                        + " Издатель " + Catalog[i].Publisher);
                    var b = Catalog[i];
                    for (var j = 0; j < b.Picked.Count; j++)
                    {
                        Console.WriteLine("Имя читателя " + b.Picked[j].Name);
                        Console.WriteLine("Дата получения " + b.Picked[j].Date);
                    }
                }
        }