#include <iostream>
#include <cstdlib>
#include "leapdate.h"
using namespace std;

leapdate::leapdate(int initial_month, int initial_day, int initial_year)
	: date {initial_month, initial_day, initial_year}
{
	if (initial_day > length()) {
		cerr << "bad day " << initial_month << "/" << initial_day << "/"
			<< initial_year << "\n";
		exit(EXIT_FAILURE);
	}
}

int leapdate::length() const
{
	const int y {get_year()};

	bool is_leap {false}; //will be true if y is a leap year

	if (y % 400 == 0) {        //2000 and 2400 are leap years
		is_leap = true;
	} else if (y % 100 == 0) { //1700, 1800, 1900, and 2100 aren't leapyears
		is_leap = false;
	} else if (y % 4 == 0) {
		is_leap = true;
	} else {
		is_leap = false;
	}

	if (!is_leap && get_month() == 2) {
		//the one case in which we're not satisfied with date::length()
		return 28;
	} else {
		return date::length();
	}
}