import datetime


class DateRange:

    def __init__(self, start_date: datetime.date, end_date: datetime.date):
        if type(start_date) != datetime.date or type(end_date) != datetime.date:
            raise TypeError("start_date and end_date must be date objects.")

        if start_date > end_date:
            raise ValueError("start_date can't be after end_date.")

        self._start_date = start_date
        self._end_date = end_date

    @property
    def start_date(self):
        return self._start_date

    @start_date.setter
    def start_date(self, value: datetime.date):
        if type(value) != datetime.date:
            raise TypeError("start_date must be a date object.")

        if value > self._end_date:
            raise ValueError("start_date can't be after end_date.")

        self._start_date = value

    @property
    def end_date(self):
        return self._end_date

    @end_date.setter
    def end_date(self, value: datetime.date):
        if type(value) != datetime.date:
            raise TypeError("end_date must be a date object.")

        if value < self._start_date:
            raise ValueError("end_date can't be before start_date.")

        self._end_date = value