/* MAIN.C */
#include <stdio.h>
#include <stdlib.h>

#include "book_shop.h"

#define MAX 64

int main() {
  FILE* information = fopen("books_information.txt", "r");
  if (information != NULL) {
    printf("All right.\n");
  }
  else {
    printf("Something's wrong...\n");
    return -1;
  }
  int BooksNumber;
  fscanf(information, "%d", &BooksNumber);
  printf("\n");

  struct Book Books[10];
  printf("Entering the information about books in your shop...\n");
  ShopFilling(&information, Books, BooksNumber);
  printf("Press ENTER.\n");
  getchar();

  int UnprofitableBooks = 0;
  int* UnprofitableBooksNumbers = UnprofBooksNumbers(Books, BooksNumber, &UnprofitableBooks);

  printf("\n\nThe information about unprofitable books: \n");
  UnprofitableBooksInf(Books, UnprofitableBooksNumbers, UnprofitableBooks);

  fclose(information);
  return 0;
}

/* BOOK_SHOP.H */
#ifndef BOOK_SHOP_H_INCLUDED
#define BOOK_SHOP_H_INCLUDED

#define MAX 64

struct Book {
  char AuthorsName[MAX];
  char AuthorsLastname[MAX];
  char Title[MAX];
  int EditionYear; // God izdaniya
  double BuyingCost; // When the shop bought these books by someone
  double SellingCost; // When the shop sold these books to someone
};

void ShopFilling(FILE** information, struct Book* current_book, int books_number);
void ShopShowing(struct Book* current_book, int books_number);
void UnprofitableBooksInf(struct Book* current_book, int* unprofitable_books, int books_number);
int* UnprofBooksNumbers(struct Book* current_book, int books_number, int* UnprofitableBooks);

#endif // BOOK_SHOP_H_INCLUDED

/* BOOK_SHOP.C */
#include <stdio.h>
#include <stdlib.h>

#include "book_shop.h"

void ShopFilling(FILE** information, struct Book* current_book, int books_number) {
  for (int i = 0; i < books_number; i++) {
    fscanf(*information, "%s", (char*)&(current_book[i].AuthorsName));
    fscanf(*information, "%s", (char*)&(current_book[i].AuthorsLastname));
    fscanf(*information, "%s", (char*)&(current_book[i].Title));
    fscanf(*information, "%d", &(current_book[i].EditionYear));
    fscanf(*information, "%lf", &(current_book[i].BuyingCost));
    fscanf(*information, "%lf", &(current_book[i].SellingCost));
  }
}

void UnprofitableBooksInf(struct Book* current_book, int* unprofitable_books, int books_number) {
  printf("\n%s|%8s|%10s|%18s|", "Number", "Name", "LastName", "Title");
  printf("%14s|%6s|%6s|\n", "Edition_Year", "Buy", "Sell");
  printf("__________________________________________________________________________\n\n");
  for (int i = 0; i < books_number; i++) {
    printf("%5d.|", i + 1);
    printf("%8s|", current_book[unprofitable_books[i]].AuthorsName);
    printf("%10s|", current_book[unprofitable_books[i]].AuthorsLastname);
    printf("%18s|", current_book[unprofitable_books[i]].Title);
    printf("%14d|", current_book[unprofitable_books[i]].EditionYear);
    printf("%3.2lf|", current_book[unprofitable_books[i]].BuyingCost);
    printf("%3.2lf|", current_book[unprofitable_books[i]].SellingCost);
    printf("\n___________________________________________________________________________\n\n");

  }
}

int* UnprofBooksNumbers(struct Book* current_book, int books_number, int* UnprofitableBooks) {
  int temp_value = *UnprofitableBooks; // = 0;
  for (int i = 0; i < books_number; i++) {
    if (current_book[i].SellingCost - current_book[i].BuyingCost < 0) {
      temp_value++;
    }
  }
  *UnprofitableBooks = temp_value;

  int* UnprofitableBooksNumbers = malloc(sizeof(int*) * temp_value);
  temp_value = 0;

  for (int i = 0; i < books_number; i++) {
    if (current_book[i].SellingCost - current_book[i].BuyingCost < 0) {
      UnprofitableBooksNumbers[temp_value] = i;
      temp_value++;
    }
  }
  return UnprofitableBooksNumbers;
}

/*BOOKS INFORMATION.TXT*/
10
Valentin Bodrov Soul's_blossom 2017 109.99 209.99
Lev Tolstoy War_and_peace 1981 599.99 469.99
Ivan Bunin Dark_avenues 1961 259.99 169.99
George Orwell 1984 2014 124.99 209.99
Anthony Burgess Clockwork_Orange 2015 109.99 149.99
Nansy Cox The_Vault 2006 259.99 234.99
Catiche Lannes April_in_Lille 2009 149.99 289.99
Andrew Richards How_do_I_survive 2013 169.99 104.99
Janette Soult Toronto's_light 2006 249.99 254.99
Emmett Brown Beatiche 2001 149.99 109.99