#include <iostream>
#include "Date.hpp"

// Function declaration
int main();

// Function definition
int main() {
  // Construct and display a date.
  Date today{ 2026, 10, 2 };

  std::cout << "The date is " << today << "." << std::endl;

  // Query the components of a date.
  std::cout << "The year is " << today.year() << "." << std::endl;
  std::cout << "The month is " << today.month() << "." << std::endl;
  std::cout << "The day is " << today.day() << "." << std::endl;

  // Obtain a string representation of a date.
  std::cout << "As a string: "
            << today.to_string() << std::endl;

  // Demonstrate prefix and postfix increment.
  Date date{ 2026, 10, 31 };

  std::cout << std::endl
            << "Starting date: " << date << std::endl;

  std::cout << "Prefix increment:  "
            << ++date << std::endl;

  std::cout << "Postfix increment: "
            << date++ << std::endl;

  std::cout << "After increment:   "
            << date << std::endl;

  // Demonstrate prefix and postfix decrement.
  std::cout << std::endl
            << "Prefix decrement:  "
            << --date << std::endl;

  std::cout << "Postfix decrement: "
            << date-- << std::endl;

  std::cout << "After decrement:   "
            << date << std::endl;

  // Demonstrate crossing a year boundary.
  Date new_year{ 2026, 12, 31 };

  std::cout << std::endl
            << new_year << " is followed by ";
  ++new_year;
  std::cout << new_year << "." << std::endl;

  // Demonstrate a leap year.
  Date leap_year{ 2024, 2, 28 };

  std::cout << leap_year << " is followed by ";
  ++leap_year;
  std::cout << leap_year << "." << std::endl;

  ++leap_year;
  std::cout << "The following date is "
            << leap_year << "." << std::endl;

  // Demonstrate the Julian-to-Gregorian transition.
  Date transition{ 1582, 10, 4 };

  std::cout << std::endl
            << transition << " is followed by ";
  ++transition;
  std::cout << transition << "." << std::endl;

  std::cout << transition << " is preceded by ";
  --transition;
  std::cout << transition << "." << std::endl;

  return 0;
}