#Kalender.py
import calendar
from datetime import date

month_name = ["Januar", "Februar", "Maerz", "April", "Mai", "Juni", "Juli", "August", "September", "Oktober", "November", "Dezember"]

# Definition Schaltjahr
def leap_year(year):
    return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)

# Definition Anzahl Tage pro Monat
def days_leap_day(year, month):
    days_per_month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
    days = days_per_month[month - 1]
    if month == 2 and leap_year(year):
        days += 1
    return days

# Calculate the calendar week number (ISO 8601)
def calendar_week(year, month, day):
    d = date(year, month, day)
    return d.isocalendar()[1]

# Definition Ausgabe
def calender(year):
    for m in range(1, 13):
        print(f"{month_name[m-1]} {year}".center(28))
        print("KW  MO  DI  MI  DO  FR  SA  SO")
        
        month_calendar = calendar.monthcalendar(year, m)
        for week in month_calendar:
            # Check if the week contains days from the current month
            if all(day == 0 for day in week):
                continue
            
            # Get the correct week number
            week_num = calendar_week(year, m, next(day for day in week if day != 0))
            print(f"{week_num:2}", end=" ")
            for day in week:
                if day == 0:
                    print("    ", end="")
                else:
                    print(f"{day:2}  ", end="")
            print()
        print()

calender(2024)