'''
Note that these functions need to parse the message['payload'] into a float
'''
converters = []


def f_from_c(c):
    return (c * 9 / 5) + 32


def topic(topic_pattern: str):

    def decorator(func):
        func.topic_pattern = topic_pattern
        converters.append(func)
        return func

    return decorator


@topic(r'([^-]+)-air-quality/sensor/particulate_matter__10_0__m_concentration/state')
def pm(message, topicGroups: tuple[str]) -> list[dict]:
    return [{
        'name': 'air_quality_pm',
        'labels': [{
            'labelName': 'location',
            'labelValue': topicGroups[0],
        }, {
            'labelName': 'size',
            'labelValue': '10',
        }],
        'value': float(message['payload']),
    }]


@topic(r'([^-]+)-air-quality/sensor/air_temperature_c/state')
def air_temp(message, topicGroups: tuple[str]) -> list[dict]:
    return [{
        'name': 'air_temperature_f',
        'labels': [{
            'labelName': 'location',
            'labelValue': topicGroups[0],
        }],
        'value': f_from_c(float(message['payload'])),
    }]