#include <iostream>
#include <iomanip>
#include <string>
#include <stdexcept>

#include "rational.hpp"

using std::cout;
using std::endl;
using std::setw;
using std::istringstream;
using std::ostringstream;
using std::string;

using cs427_527::Rational;

int main(int argc, char *argv[])
{
  Rational pi{22, 7};
  Rational zero{};
  Rational one{1};
  Rational half{std::string("1/2")};
  Rational third{"1/3"};

  Rational sum = half + third;
  half.print(cout);
  cout << " + ";
  third.print(cout);
  cout << " = ";
  sum.print(cout) << endl;
    
  sum += one;
  cout << "adding one: " << sum << endl;

  // 1 automatically converted to Rational via Rational::Rational(int)

  // can (and maybe should) turn off by marking that constructor explicit
  sum += 1;
  cout << "adding one again: " << sum << endl;

  // the following requires multiple conversions, so doesn't work
  //sum += "2/10";
  //cout << "after adding 1 and 2/10: " << setw(16) << sum << endl;

  int x = pi;
  cout << "pi is approx " << x << endl;

  // compiler won't choose between converting lhs via Rational::operator int
  // to int and doing int+int or converting rhs to Rational via
  // Rational::Rational(int) and doing Rational+Rational
  // cout << sum + 1 << endl;

  try
    {
      Rational undef{1, 0};
    }
  catch (const std::domain_error& e)
    {
      cout << e.what() << endl;
    }
  catch (const std::out_of_range& e)
    {
      cout << "this won't happen, but you can handle different types of\n"
	   << "excpetions with multiple catch blocks"
	   << endl;
    }
  catch (...)
    {
      cout << "or just any exception with ... (but then refer to the\n"
	   << "exception to get the message inside, for example"
	   << endl;
    }
}