"""HuntLibrary.py

Schedule and calendar calculations for determining state of the HL A11 performance space and environs.
"""

import datetime

#================================================================

holidays = [
    datetime.date(2023, 9, 4),     # Labor Day
    datetime.date(2023, 10, 16),   # Mon of Fall Break
    datetime.date(2023, 10, 17),
    datetime.date(2023, 10, 18),
    datetime.date(2023, 10, 19),
    datetime.date(2023, 10, 20),   # Fri of Fall Break
    datetime.date(2023, 11,  7),   # Tue Democracy Day
    datetime.date(2023, 11, 22),   # Wed of Thanksgiving break
    datetime.date(2023, 11, 23),   # Thu of Thanksgiving break
    datetime.date(2023, 11, 24),   # Fri of Thanksgiving break
    ]

class_start_time = datetime.time(14,0,0)   # 2:00 PM
class_end_time   = datetime.time(15,50,0)  # 3:50 PM

#================================================================

def datetime_properties(now):
    """Given a datetime object, return a dictionary with the time and a number
    of properties useful for time-based policy decisions.
    """

    now_date = now.date()         # extract a date object
    now_time = now.time()         # extract a time object

    weekday = now_date.weekday()  # Monday is 0, Sunday is 6

    hour    = now_time.hour
    minute  = now_time.minute

    result = dict()
    result['time'] = now
    result['string'] = now.strftime("%Y-%m-%d %a %b %d %H:%M:%S")

    # true if the day is on a weekend
    result['is_weekend'] =  (weekday == 5) or (weekday == 6)

    # true if the date falls on a campus holiday
    result['is_campus_holiday'] = (now_date in holidays)

    # true if the time falls during the regular business day on a non-holiday
    result['is_business_hours'] = (not result['is_weekend']
                                   and (not result['is_campus_holiday'])
                                   and (hour >= 8) and (hour < 18))

    # true if the date and time fall during class
    result['is_class_time'] = (((weekday == 1) or (weekday == 3)) # Tue or Thu
                               and (not result['is_campus_holiday'])
                               and (now_time >= class_start_time)
                               and (now_time < class_end_time))

    # true if time and date are reasonable for active operation
    result['is_show_time'] = result['is_business_hours'] and (not result['is_class_time']) and (minute > 49)

    return result

#================================================================
def current_time_properties():
    """Return a dictionary with the current time and a number of properties useful for time-based policy decisions.
    """
    now = datetime.datetime.now() # datetime() object with both date and time
    return datetime_properties(now)

#================================================================
# The following section is run when this is loaded as a script.
if __name__ == "__main__":

    def test(sample):
        print(datetime_properties(sample))

    test(datetime.datetime(2023,  8, 28, 17, 59))
    test(datetime.datetime(2023,  8, 28, 18,  0))
    test(datetime.datetime(2023,  8, 29, 14,  1))
    test(datetime.datetime(2023,  9,  3,  4,  0))
    test(datetime.datetime(2023, 10, 17, 14,  1))