using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace K1
{
    class Book
    {
        /// <summary>
        /// 
        /// </summary>
        public string Creator { get; set; }
        public string Name { get; set; }
        public int Count { get; set; }
        public decimal SinglePrice { get; set; }

        public Book(string creator, string name, int count, decimal price)
        {
            this.Name = name;
            this.Count = count;
            this.SinglePrice = price;
            this.Creator = creator;
        }
        public Book(string name, int count, decimal price)
        {
            this.Name = name;
            this.Count = count;
            this.SinglePrice = price;
        }

        public override string ToString()
        {
            return string.Format("{0,-18} |{1,-20}|{2,8}|{3,10}|", Creator, Name, Count, SinglePrice);
        }

        public static bool operator <=(Book lhs, Book rhs)
        {
            return (lhs.SinglePrice <= rhs.SinglePrice) && (lhs.Name == rhs.Name) && (lhs.Count > 0 && rhs.Count > 0);
        }

        public static bool operator >=(Book lhs, Book rhs)
        {
            return (lhs.SinglePrice >= rhs.SinglePrice) && (lhs.Name == rhs.Name) && (lhs.Count > 0 && rhs.Count > 0);

        }


    }

    class BookStore
    {
        private List<Book> Books = new List<Book>();

        public BookStore(List<Book> books)
        {
            foreach(Book book in books)
            {
                this.Books.Add(book);
            }
        }

        public BookStore()
        {
            Books = new List<Book>();
        }


        public int GetCount()
        {
            return this.Books.Count;
        }

        public Book GetBook(int index)
        {
            return this.Books[index];
        }

        public void AddBook(Book book)
        {
            this.Books.Add(book);
        }

        public decimal Sum()
        {
            decimal tempSum = 0;

            foreach (Book book in Books)
            {
                tempSum += book.SinglePrice * book.Count;
            }

            return tempSum;
        }

        public int IndexMaxPrice(Book book)
        {
            int index = -1;
            for (int i = 0; i < Books.Count; i++)
            {
                // (lhs.SinglePrice >= rhs.SinglePrice) && (lhs.Name == rhs.Name) && (lhs.Count > 0 && rhs.Count > 0);
                if (Books[i] >= book)
                {
                    index = i;
                }
            }

            return index;
        }

        public void AddSalePrice(List<Book> books)
        {
            for(int i = 0; i < books.Count; i++)
            {
                int index = IndexMaxPrice(books[i]);
                if (index != -1)
                {
                    books[i].SinglePrice = Books[index].SinglePrice;
                    Books[index].Count--;
                }
            }
        }
    }
    /// <summary>
    /// Class contaiting methods for results input/output
    /// </summary>
    class InOut
    {
        public static BookStore InputBooks(string fileName)
        {

            List<Book> books = new List<Book>();

            string[] lines = File.ReadAllLines(fileName, Encoding.UTF8);
            string creator, name;
            int count;
            decimal price;

            for (int i = 0; i < lines.Length; i++)
            {
                string[] parts = lines[i].Split(';');

                creator = parts[0];
                name = parts[1];
                count = int.Parse(parts[2]);
                price = decimal.Parse(parts[3]);

                Book book = new Book(creator, name, count, price);
                books.Add(book);
            }

            BookStore store = new BookStore(books);

            return store;

        }
        public static List<Book> InputSoldBooks(string fileName)
        {
            string[] lines = File.ReadAllLines(fileName, Encoding.UTF8);

            List<Book> soldBooks = new List<Book>();

            for (int i = 0; i < lines.Length; i++)
            {
                Book book = new Book(lines[i],1,0);
                soldBooks.Add(book);
            }

            return soldBooks;
        }

        public static void Print(BookStore books, string fileName, string header)
        {
            string line = "";

            line += header + "\n";
            line += new string('-', 50) + "\n";
            line += string.Format("{0,-18} {1,-20} {2,8} {3,10}", "Platintojas", "Pavadinimas", "Kiekis", "Kaina") + "\n";

            line += new string('-', 50) + "\n";

            for (int i = 0; i < books.GetCount(); i++)
            {
                line += books.GetBook(i).ToString() + "\n";
            }
            line += new string('-', 50) + "\n";

            File.AppendAllText(fileName, line, Encoding.UTF8);
        }

        public static void Print(List<Book> books, string fileName, string header)
        {
            string line = "";

            line += header + "\n";
            line += new string('-', 50) + "\n";

            line += string.Format("{0,-18} {1,-20} {2,8} {3,10}", "Platintojas", "Pavadinimas", "Kiekis", "Kaina") + "\n";

            line += new string('-', 50) + "\n";

            for (int i = 0; i < books.Count; i++)
            {
                line += books[i].ToString() + "\n";
            }

            line += new string('-', 50) + "\n";

            File.AppendAllText(fileName, line, Encoding.UTF8);
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            File.Delete("Duomenys.txt");
            BookStore bookStore = InOut.InputBooks("Knyga.txt");
            List<Book> soldBooks = InOut.InputSoldBooks("Parduota.txt");

            InOut.Print(bookStore, "Duomenys.txt", "Pradinis knyogs");
            InOut.Print(soldBooks, "Duomenys.txt", "Pradinis Pardavimas");

            BookStore soldBookRegister = new BookStore(soldBooks);
            bookStore.AddSalePrice(soldBooks);


            InOut.Print(soldBookRegister, "Duomenys.txt", " Papildyta Parduota");
            InOut.Print(bookStore, "Duomenys.txt", "Galutinis knygos");

            string moneyLeft = string.Format("Turi dar surinkti {0} eur.", bookStore.Sum());
            File.AppendAllText("Duomenys.txt", moneyLeft);
        }
    }
}