/* review_program.cpp
 * Summary: Implementation for main program functionality
 * Test Cases:
 *   - 1221 69.95 30 150 1 1; 4686.65 937.33
 *   - 8392 60 30 150 1 1; 4020 804
 *   - 8392 60 30 150 1 1; 1800 360
 *   - 8392 60 30 100 1 1; 600 120
 * Author: Zoltan Szabatin
 * Created: April 2nd, 2024
 */

#include "review_program.h"
#include "textbook.h"

#include <cstdint>
#include <iostream>

namespace wk1_reviewProgram_zSzabatin {

void InputToTextbook(Textbook &textbook) {
  // Obtain and set all non-evaluated values for textbook
  textbook.SetCode(InputToTextbookValue<uint64_t>("Book"));
  textbook.SetSingleCopyPrice(InputToTextbookValue<double>("Price"));
  textbook.SetNumberOnHand(InputToTextbookValue<uint64_t>("Number on hand"));
  textbook.SetProspectiveEnrollment(
      InputToTextbookValue<uint64_t>("Enrollment"));
  textbook.SetIsRequired(
      InputToTextbookValue<bool>("Required (1 = required, 0 = optional)"));
  textbook.SetIsUsed(InputToTextbookValue<bool>("Used (1 = used, 0 = new)"));
} // void InputToTextbook(Textbook &textbook)

template <typename T> T InputToTextbookValue(const std::string &message) {
  // Helper for repetitive textbook value prompts
  T value = 0;

  std::cout << message << ": ";
  std::cin >> value;

  return value;
} // template <typename T> T InputToTextbookValue(const std::string &message)

void TextbookInputHandler(std::vector<Textbook> &textbooks) {
  // 1. Input textbook
  // 2. Print textbook
  // 3. Evaluate textbook needs
  // 4. Print textbook needs
  // 5. Add textbook to running count
  Textbook textbook;

  InputToTextbook(textbook);

  std::cout << "---" << std::endl;

  textbook.Print();

  std::cout << "---" << std::endl;

  textbook.EvaluateNeeds();
  textbook.PrintNeeds();

  std::cout << "---" << std::endl;

  textbooks.push_back(textbook);
} // void TextbookInputHandler(std::vector<Textbook> &textbooks)

void FullTextbookPurchaseSummary(const std::vector<Textbook> &textbooks) {
  double total_for_all_books = 0.0;

  // Calculate total cost for all books
  for (const Textbook &textbook : textbooks) {
    total_for_all_books += textbook.GetTotalCost();
  }

  // Print total cost for all books and expected profits
  std::cout << "\n---\nTotal cost for all books: $" << total_for_all_books
            << std::endl;
  std::cout << "Expected profit: $" << total_for_all_books * 0.2 << std::endl;
} // void FullTextbookPurchaseSummary(const std::vector<Textbook> &textbooks)

} // namespace wk1_reviewProgram_zSzabatin

int main() {
  bool run_again = false;
  std::vector<wk1_reviewProgram_zSzabatin::Textbook> textbooks;

  // Loop until user is done entering textbooks
  do {
    wk1_reviewProgram_zSzabatin::TextbookInputHandler(textbooks);

    std::cout << "Enter 1 to do another book, 0 to stop. ";
    std::cin >> run_again;
  } while (run_again);

  // Print full purchase summary
  wk1_reviewProgram_zSzabatin::FullTextbookPurchaseSummary(textbooks);

  return 0;
} // int main()