package zad2;


import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class timeClass {
	@SuppressWarnings("deprecation")
	public static void main(String[] args) throws ParseException {

		calcDaysWW2();
		day68(2016);
		calcDaysFromYourDate();
		dateCalc("10:00","17:00");

	}

	private static void day68(int year)  {
		  	SimpleDateFormat sdf = new SimpleDateFormat("yyyy MMM dd");
			Calendar calendar = new GregorianCalendar(year,0,01);
			//System.out.println("Date : " + sdf.format(calendar.getTime()));
			String months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
			         "Oct", "Nov", "Dec"};
			String daysofWeek[] = {"", "Mon","Tue","Wedn","Thursday","Friday","Saturday","Sunday"}; // 0 is empty

			calendar.add(Calendar.DAY_OF_MONTH, 68);
			//System.out.println("Date : " + sdf.format(calendar.getTime()));
			int month      = calendar.get(Calendar.MONTH); // Jan = 0, dec = 11
			int dayOfWeek  = calendar.get(Calendar.DAY_OF_WEEK);
			//System.out.println("Month " + months[month]);
			System.out.println("68 day of 206 is " + daysofWeek[dayOfWeek]);




	}

	private static void calcDaysWW2() {
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");


		Date startWW2 = new Date(1900,9,1);
		Date endWW2 = new Date(1945,9,1);

		try{
			startWW2 = format.parse ( "1939-12-31" );
		} catch (ParseException e){
			e.printStackTrace();
		}

		try {
			endWW2 = format.parse ( "1945-12-31" );
		} catch (ParseException e) {
			e.printStackTrace();
		}

		long days1 = endWW2.getTime() / (24 * 60 * 60 * 1000) - startWW2.getTime() / (24 * 60 * 60 * 1000);
		System.out.println("WW2 time : " + days1);

	}

	private static void calcDaysFromYourDate() {
		LocalDate localDate ;
		Calendar calendar = new GregorianCalendar(1997,9,6);
		int currentYear = Calendar.getInstance().get(Calendar.YEAR);

		calendar.add(Calendar.YEAR, 1);
		//System.out.println(calendar.get(Calendar.YEAR));
		int count = 0; //count of 29 fab in my life

		while(calendar.get(Calendar.YEAR)<currentYear)
		{
			localDate = LocalDateTime.ofInstant(calendar.toInstant(), calendar.getTimeZone().toZoneId()).toLocalDate();
			if(localDate.isLeapYear()){
				count++;
			}
			calendar.add(Calendar.YEAR, 1);
		}

		System.out.println("count of 29 Fab :" +count);


	}

	private static void dateCalc(String string, String string2) throws ParseException {




		 //SimpleDateFormat format = new SimpleDateFormat("hh-mm");
		 //Date startWW2       = format.parse ( "10-20" );
		 //now.setTime(startWW2);

		 //now.MINUTE
		 //startWW2 = now.getTime();
		 //System.out.println(startWW2);
		 Calendar destinyTime = Calendar.getInstance();
		 Calendar now = Calendar.getInstance();

		 SimpleDateFormat format = new SimpleDateFormat("hh:mm");
		 Date newTime = format.parse ( string );
		 now.setTime(newTime);
		 Date destiny = format.parse ( string2 );
		 destinyTime.setTime(destiny);
		 String computeString;
		 int i = 0 ;


		 while(true)
		 {
			 if((now.get(Calendar.MINUTE) == destinyTime.get(Calendar.MINUTE) )&& (now.get(Calendar.HOUR) == destinyTime.get(Calendar.HOUR))) {


				  break;
			 }
			 //System.out.println(now.get(Calendar.MINUTE)+destinyTime.get(Calendar.MINUTE));
			 //System.out.println(now.get(Calendar.HOUR) + destinyTime.get(Calendar.HOUR));
			 computeString = Integer.toString(now.get(Calendar.MINUTE)) + Integer.toString(now.get(Calendar.HOUR));
			// System.out.println(computeString);
			 if(sumOfDigits(computeString)==15){
				 i++;

			 }
			 now.add(Calendar.MINUTE,1);
		 }
		 System.out.println("Count of 15 : " + i);



	}



	public static int sumOfDigits(String s1) {
	    int sum = 0;
	    for (int i = 0; i < s1.length(); i++) {
	      char a = s1.charAt(i);
	      if (Character.isDigit(a)) {
	        int b = Integer.parseInt(String.valueOf(a));
	        sum = sum + b;
	      }
	    }
	    return sum;
	  }

}