class Capaciteitstarief:
    def __init__(self):
        self.gemiddelde_maandpiek = 38.7570  # Eur / KW / jaar
        self.kwh_tarief = 36.0218 / 1000  # EUR / kWh
        self.databeheer = 13.71  # EUR / jaar

    def calculate(self, peak: float, usage: float, days: int):
        """calculate distribution cost

        :param peak: gemiddelde peak over alle maanden
        :type peak: float
        :param usage: totaal aantal kWh verbruikt
        :type usage: float
        :param days: totaal aantal dagen verbruikt
        :type days: int
        """
        peak = max(peak, 2.5)
        return ((peak * self.gemiddelde_maandpiek) / 365 * days + usage * self.kwh_tarief + self.databeheer / 365 * days) * self.btw

    def calculate_per_kwh(self, peak: float) -> tuple(float, float):
        """calculate_per_kwh distribution cost

        :param peak: gemiddelde peak over alle maanden
        :type peak: float
        :return: cost per kwh and yearly costs
        """
        return self.kwh_tarief, self.databeheer + self.gemiddelde_maandpiek * peak