from typing import Final

lecture_time: Final[int] = 15
ects_effort: Final[int] = 30


class Lecture():
    def __init__(self, name, ects, frequency):
        """

        :param name:
        :param ects:
        :param frequency:
        """
        self._name = name
        self._ects = ects
        self._frequency = frequency

    def cal_effort(self, time_per_ects = ects_effort, duration = lecture_time) -> float:
        """
        Berechnet den Zeitaufwand pro woche für diese Vorlesung
        :param time_per_ects:
        :param duration:
        :return:
        """
        effort_in_time = self._ects * time_per_ects
        effort_per_week = effort_in_time / duration
        return effort_per_week - (self._frequency * 1.5)

    def __repr__(self):
        return f"Vorlesungsname {self._name} ECTS: {self._ects}"

    # def __str__(self):
    #    return self.__repr__()


def parse_lecture_line(line: str) -> Lecture:
    words = line.split(";")
    words = [w.strip() for w in words]
    name = words[0]
    count = float(words[1])
    ects = int(words[2])
    return Lecture(name, ects, count)
    pass