from stimuli.AbstractStimulus import AbstractStimulus


class StepStimulus(AbstractStimulus):

    def __init__(self, start, duration, value, base_value=0, seconds=True):
        self.start = 0
        self.duration = 0
        self.base_value = base_value
        self.value = value
        if seconds:
            self.start = start
            self.duration = duration
        else:
            self.start = start / 1000
            self.duration = duration / 1000

    def value_at_time_in_ms(self, time_point):
        return self.value_at_time_in_s(time_point/1000)

    def value_at_time_in_s(self, time_point):
        if self.start <= time_point <= self.start + self.duration:
            return self.value
        else:
            return self.base_value