class FlexHouse_real():
    def __init__(self):
        pass

    def setActivePower(self, power_reference):
        if power_reference < -10:
            power_reference = -10

        if power_reference > 0:
            raise ValueError("Positive power means production")
        self.__setValue('flexHousePowerRef_kW',-power_reference)

    def getTemperature(self):
        return self.__getValue('flexHouseTemperature_C')

    def getActivePower(self):
        return self.__getValue('flexHousePower_kW')

    def __getValue(self, key):
        from requests import get, auth
        import re

        if not type(key) is str: raise TypeError('Key should be a string, found {0}'.format(type(key)))
        if key is '': raise TypeError('Key should be an empty string')

        url = 'http://whiteboard.syslab.dk/wbget.php'
        r = get(url, auth=auth.HTTPBasicAuth('twinPV99', 'twinPV99'))
        entries = r.text.split('\n')

        result = None

        for entry in entries:
            entry = entry.rstrip().lstrip()
            g = re.match('SYSLAB@(\d+):{0}=(.+);'.format(key), entry)
            if g is None:
                continue
            else:
                g = g.groups()
                result = g[1]
                break

        return result

    def __setValue(selv, key, value):
        from requests import post, auth
        url = '{0}{1}?source=SYSLAB&{2}={3}'.format('http://whiteboard.syslab.dk/', 'wbset.php', key, str(value))
        post(url, auth=auth.HTTPBasicAuth('twinPV99', 'twinPV99'))