import os
import requests

from configparser import ConfigParser


class WeatherUpdater:
    def __init__(self, configFile):
        config = ConfigParser()
        config.read(configFile)

        host = config['weather'].get('host')
        user = config['weather'].get('user')
        password = config['weather'].get('pass')
        lat = config['weather'].get('lat')
        lon = config['weather'].get('lon')

        self.uri = f'https://{host}/api/weather?lat={lat}&lon={lon}&units=metric'
        self.auth = (user, password)
        self.weatherTempFile = 'weather.tmp'
        self.weatherFile = 'weather.txt'

        # TODO - clear weather file on init and on failure

    def updateWeather(self):
        try:
            temperature = round(self.getTemperature())
            self.persistTemperature(temperature)
        except requests.exceptions.ConnectionError:
            print('connection error', flush=True)
            self.characterDisplay.clearRow(self.topRow)
        except requests.exceptions.Timeout:
            print('timeout', flush=True)
            self.characterDisplay.clearRow(self.topRow)

    def getTemperature(self):
        weather = self.getWeather()
        currentWeather = list(
            filter(
                lambda t: t['timestep'] == 'current',
                weather['tomorrow']['data']['timelines']
            )
        )

        return currentWeather[0]['intervals'][0]['values']['temperature']

    def getWeather(self):
        return requests.get(self.uri, auth=self.auth).json()

    def persistTemperature(self, temperature):
        with open(self.weatherTempFile, 'w') as file:
            file.write(str(temperature))

        os.replace(self.weatherTempFile, self.weatherFile)