#include <iostream>
using namespace std;

#include "Date.h"

ostream& operator<< (ostream &output, const Date &a)
{
    output << a.month << '/' << a.day << '/' << a.year;
    return output;
}

istream& operator>>(istream &input, Date &a)
{
    input >> a.month;
    cin.ignore(1);
    input >> a.day;
    cin.ignore(1);
    input >> a.year;

    return input;
}

//constructor validates month and calls utility function to validate day
Date::Date(int mn, int dy, int yr)
{
 setDate(mn, dy, yr);
}


Date& Date::setDate(int mn, int dy, int yr)
{
 if(mn > 0 && mn <= 12)
 {
    month  = mn;
 }

 else
 {
     month = 1;
 }

 year = yr;  //could also validate year

 day = checkDay(dy);  //to validate the day

return *this; //should this be here?
}

//PRIVATE COST UTILITY FUNCTION
int Date::checkDay(int testDay) const
{
    static const int daysPerMonth[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31};

    if(testDay > 0 && testDay <= daysPerMonth[month])
    {
     return testDay;
    }

    //determine whether testDay is valid for a specific month
    if(month == 2 && testDay == 29 && (year  % 400 == 0 || (year % 4  == 0 && year % 100 != 0)))
    {
      return testDay;
    }

    cout << "Invalid Day " << testDay << " was set to 1" << endl;
    return 1;  //keep data in valid state
}


int Date::getMonth() const
{
    return month;
}

Date& Date::setMonth(int m)
{
    month = (m >= 1 && m <= 12) ? m : 1;  //validates month, if valid set to m, else set to 1
    return *this;
}


int Date::getDay() const
{
    return day;
}

Date& Date::setDay(int d)
{
    day = checkDay(d);
    return *this;
}


int Date::getYear() const
{
    return year;
}

Date& Date::setYear(int y)
{
    year = y;
    return *this;
}

//void Date::operator= (const Date &a)
//{
//    month = a.month;
//    day = a.day;
//    year = a.year;
//
//}