#!/usr/bin/env python3

# You need to somehow make the variables OWM_LAT, OWM_LON, OWM_APIKEY
# available in the environment before using this.

import requests
import sys
import os

from block import *

WEATHER_URL = "https://api.openweathermap.org/data/2.5/weather?lat={lat}&lon={lon}&units=metric&appid={apikey}"


class Weather(Block):
    def execute(self):
        url = WEATHER_URL.format(
            lat=os.environ['OWM_LAT'],
            lon=os.environ['OWM_LON'],
            apikey=os.environ['OWM_APIKEY'],
        )

        weather = requests.get(url).json()

        self.icon_from_id(weather['weather'][0]['icon'])

        return '{temp:.1f}°C {wind_bft}  {windspeed:.1f}m/s {wind_icon}'.format(
            temp=weather['main']['temp'],
            wind_bft=self.wind_bft(weather['wind']['speed']),
            wind_icon=self.wind_icon(weather['wind']['deg']),
            windspeed=weather['wind']['speed'],
        )

    def icon_from_id(self, icon_id):
        # https://openweathermap.org/weather-conditions
        # http://nerdfonts.com/?set=nf-weather-#cheat-sheet
        if icon_id.startswith('01'):
            # clear sky
            if icon_id[2] == 'd':
                self.set_icon('\ue30d')  # nf-weather-day_sunny
                self.set_icon_color('yellow')
            else:
                self.set_icon('\ue32b')  # nf-weather-night_clear
                self.set_icon_color('gray')

        elif icon_id.startswith('02'):
            # few clouds
            if icon_id[2] == 'd':
                self.set_icon('\ue30c')  # nf-weather-day_sunny_overcast
            else:
                self.set_icon('\ue37b')  # nf-weather-night_partly_cloudy

        elif icon_id.startswith('03') or icon_id.startswith('04'):
            # scattered clouds / broken clouds
            if icon_id[2] == 'd':
                self.set_icon('\ue302')  # nf-weather-day_cloudy
            else:
                self.set_icon('\ue32e')  # nf-weather-night_cloudy

        elif icon_id.startswith('09'):
            # shower rain
            if icon_id[2] == 'd':
                self.set_icon('\ue309')  # nf-weather-day_showers
            else:
                self.set_icon('\ue334')  # nf-weather-night_showers

        elif icon_id.startswith('10'):
            # rain
            if icon_id[2] == 'd':
                self.set_icon('\ue308')  # nf-weather-day_rain
            else:
                self.set_icon('\ue333')  # nf-weather-night_rain

        elif icon_id.startswith('11'):
            # thunderstorm
            if icon_id[2] == 'd':
                self.set_icon('\ue30f')  # nf-weather-day_thunderstorm
            else:
                self.set_icon('\ue338')  # nf-weather-night_thunderstorm

        elif icon_id.startswith('13'):
            # snow
            if icon_id[2] == 'd':
                self.set_icon('\ue30a')  # nf-weather-day_snow
            else:
                self.set_icon('\ue335')  # nf-weather-night_snow

        elif icon_id.startswith('50'):
            # mist
            if icon_id[2] == 'd':
                self.set_icon('\ue303')  # nf-weather-day_fog
            else:
                self.set_icon('\ue346')  # nf-weather-night_fog

    def wind_bft(self, speed):
        scale = [
            [0.0, '\ue3af', 'white'],  # 0 BFT
            [0.5, '\ue3b0', 'white'],  # 1 BFT
            [1.6, '\ue3b1', 'white'],  # 2 BFT
            [3.4, '\ue3b2', 'white'],  # 3 BFT
            [5.5, '\ue3b3', 'white'],  # 4 BFT
            [8.0, '\ue3b4', 'white'],  # 5 BFT
            [10.8, '\ue3b5', 'yellow'],  # 6 BFT
            [13.9, '\ue3b6', 'yellow'],  # 7 BFT
            [17.2, '\ue3b7', 'yellow'],  # 8 BFT
            [20.8, '\ue3b8', 'red'],  # 9 BFT
            [24.5, '\ue3b9', 'red'],  # 10 BFT
            [28.5, '\ue3ba', 'red'],  # 11 BFT
            [32.7, '\ue3bb', 'red'],  # 12 BFT
        ]

        selected = None
        for scale_item in scale:
            if scale_item[0] <= speed:
                selected = scale_item

        return self.color_text(selected[1], selected[2])

    def wind_icon(self, direction):
        icons = [
            '\ue353',  # nf-weather-direction_up
            '\ue352',  # nf-weather-direction_up_right
            '\ue349',  # nf-weather-direction_right
            '\ue380',  # nf-weather-direction_down_right
            '\ue340',  # nf-weather-direction_down
            '\ue33f',  # nf-weather-direction_down_left
            '\ue344',  # nf-weather-direction_left
            '\ue37f',  # nf-weather-direction_up_left
            '\ue353',  # nf-weather-direction_up
        ]

        return icons[round(direction / 45)]


def main():
    block = Weather(None)
    block.render()


if __name__ == '__main__':
    main()