//*********************************************************************
// Driver program to test the date class
//
// Written by : Rex Forsyth
// May 15, 2006
// An example for CS2660
//*********************************************************************
#include <iostream>
using namespace std;

//#include <utility>
//using namespace std::rel_ops;

#include "date.h"

const Date JAN01 = Date(2006,01,01);

int main()
{
   // get valid user input using prompts
   Date day0;
   day0.read();
   cout << "Day 0 is "; day0.print(); cout << endl;

    // get invalid user input without prompts
   cout << "Enter an invalid date -- ";
   cin >> day0;
   cout << "After invalid input day 0 is "<< day0 << endl;

   // initialize date with no parameters -- result should be the default
   Date day1;
   cout << "after declaration with no parameters " << "day1 is "
	<< day1 << endl;

    // check assignment of a date
   day1 = day0;
   cout << "after assignment to day 0, day 1 is " << day1 << endl;

    // create a valid date 
   Date day2(2000,2,29);
   cout << "After Date day(2000,2,29), day 2 is " << day2 << endl;
	
    // creating an invalid date
   Date day3(1997,9,31);       // not 31 days in  9th month
   cout << "After Date day3(1997,9,31), day 3 is " << day3 
	<< " since Sept 31 is invalid. " << endl;
	
    // subtracting 4 years from Feb 29 -- should still be Feb 29, 1996
   day2.addYear(-4);
   cout << "after subtracting 4 years from day2, it is " << day2 << endl;

    // subtracting 365 days from Feb 29 -- should be Mar 1, 1995
   day2.addDay(-365);
   cout << "after subtracting 365 days from day2, it is " << day2 << endl;
    
    // subtracting 37 months -- should be 1 Feb 1992
   day2.addMonth(-37);   
   cout << "after subtracting 37 months from day2, it is ";
   day2.print(cout); cout << endl;

   Date day4(1996,2,29);
   cout << "day4 is " << day4 << endl;

   // subtracting 366 days -- should be 28 Feb 1995
   day4.addDay(-366);   
   cout << "after subtracting 366 days from day4, it is " << day4 << endl;

    // subtracting 28 days to get to the 31st of Jan 1995
   day4.addDay(-28);
   cout << "after subtracting 28 days from day4, it is " << day4 << endl;

    // checking that subtracting 2 months from 31 gives end of prev month
    // subtracting 2 months -- should be 30 Nov 1994
   day4.addMonth(-2);
   cout << "after subtracting 2 months from day4, it is " << day4 << endl;

    // testing the leapYear function
   day4.print(cout); cout << " is";
   if (!Date::leapYear(day4.year()))  cout << " not";
   cout << " in a leap year." << endl;

   // testing the today function
   Date day5;
   day5 = Date::today();
   cout << "Today is " << day5<< endl;

   // testing comparison operators
   cout << day2;
   if (day2 == day2) cout << " is the same as ";
   else cout << " is not the same as ";
   cout << day2 << endl; 

   cout << day3;
   if (day3 == day2) cout << " is the same as ";
   else cout << " is not the same as ";
   cout << day2 << endl; 

   cout << day4;
   if (day4 < day3) cout << " comes before ";
   else cout << " does not come before ";
   cout << day3 << endl; 

   cout << day3;
   if (day3 > day4) cout << " comes after ";
   else cout << " does not come after ";
   cout << day4 << endl; 

   // showing need for const on the parameter
   if (day3 < Date::today())
      cout << "In the past";
   else
      cout << "In the future.";
   cout << endl;

   if (day3 < JAN01)
      cout << "before 2006";
   else
      cout << "after";
   cout << endl;
   
   // showing need for const on the function
   if (JAN01 < day3) cout << "before"; else cout << "after";
   cout << endl;

   return 0;
}