from datetime import datetime, timedelta, timezone
import itertools
import json
import os
import urllib.error
import urllib.parse
import urllib.request
from zoneinfo import ZoneInfo

class WeatherAPI:

    def __init__(self, apikey=None, gps=None, opts={"lang": "fr", "units": "metric"}):
        self.apikey = apikey or os.environ["WEATHERAPIKEY"]
        self.baseurl = "http://api.weatherapi.com/v1"
        self.default_gps = gps or ("GPS" in os.environ and os.environ["GPS"]) or "48.8127,2.3437"
        self.opts = opts

        self._cached_file = ".weather-%s-%s.cache"


    def get_weather(self, apitype="forecast", gps=None, **params):
        if gps is None:
            gps = self.default_gps

        cached_filename = self._cached_file % (apitype + ("" if "dt" not in params else "-{}".format(params["dt"])), gps)
        # Read the mod time
        statinfo = None
        try:
            statinfo = os.stat(cached_filename)
        except:
            pass

        params["q"] = gps
        params["key"] = str(self.apikey)
        params["alerts"] = "yes"
        params["aqi"] = "yes"
        for k in self.opts:
            params[k] = self.opts[k]

        if statinfo is None or datetime.fromtimestamp(statinfo.st_mtime, tz=timezone.utc) + timedelta(hours=1) < datetime.now(tz=timezone.utc):
            # Do the request and save it
            try:
                with urllib.request.urlopen(self.baseurl + "/" + apitype + ".json?" + urllib.parse.urlencode(params)) as f:
                    with open(cached_filename, 'wb') as fd:
                        fd.write(f.read())
            except ConnectionResetError:
                pass
            except urllib.error.URLError:
                pass


        # Retrieve cached data
        res = {}
        with open(cached_filename) as f:
            res = json.load(f)

        return res


    def get_icon(icon, night=False, current=False):
        if icon == 1000:
            if not night:
                return "wi-day-sunny.png"
            else:
                return "wi-night-clear.png"
        elif icon == 1003:
            if not night:
                return "wi-day-cloudy.png"
            else:
                return "wi-night-alt-cloudy.png"
        elif icon == 1006:
            return "wi-cloudy.png"
        elif icon == 1009:
            if not night:
                return "wi-day-sunny-overcast.png"
            else:
                return "wi-night-alt-partly-cloudy.png"
        elif icon == 1030 or icon == 1072:
            if not night:
                return "wi-day-haze.png"
            else:
                return "wi-night-fog.png"
        elif icon == 1063:
            if not night:
                return "wi-day-rain.png"
            else:
                return "wi-night-alt-rain.png"
        elif icon == 1066:
            if not night:
                return "wi-day-snow.png"
            else:
                return "wi-night-alt-snow.png"
        elif icon == 1069 or icon == 1204:
            if not night:
                return "wi-day-sleet.png"
            else:
                return "wi-night-alt-sleet.png"
        elif icon == 1087:
            if not night:
                return "wi-day-lightning.png"
            else:
                return "wi-night-alt-lightning.png"
        elif icon == 1114 or icon == 1219 or icon == 1222 or icon == 1258:
            return "wi-snow.png"
        elif icon == 1117 or icon == 1225:
            return "wi-snow-wind.png"
        elif icon == 1135 or icon == 1147:
            return "wi-fog.png"
        elif icon == 1150 or icon == 1153:
            return "wi-sprinkle.png"
        elif icon == 1168 or icon == 1171 or icon == 1198 or icon == 1201:
            return "wi-snowflake-cold.png"
        elif icon == 1180 or icon == 1183 or icon == 1186:
            if not night:
                return "wi-day-rain.png"
            else:
                return "wi-night-alt-rain.png"
        elif icon == 1189 or icon == 1192 or icon == 1195:
            return "wi-rain.png"
        elif icon == 1240 or icon == 1243:
            return "wi-showers.png"
        elif icon == 1246:
            return "wi-tsunami.png"
        elif icon == 1207 or icon == 1249 or icon == 1252:
            return "wi-sleet.png"
        elif icon == 1210 or icon == 1213 or icon == 1216 or icon == 1255:
            if not night:
                return "wi-day-snow.png"
            else:
                return "wi-night-snow.png"
        elif icon == 1237:
            return "wi-hail.png"
        elif icon == 1261 or icon == 1264:
            if not night:
                return "wi-day-hail.png"
            else:
                return "wi-night-hail.png"
        elif icon == 1273 or icon == 1276:
            if not night:
                return "wi-day-thunderstorm.png"
            else:
                return "wi-night-thunderstorm.png"
        elif icon == 1279 or icon == 1282:
            if not night:
                return "wi-day-snow-thunderstorm.png"
            else:
                return "wi-night-snow-thunderstorm.png"
        else:
            return "wi-alien.png"


    def get_moon_icon(self, day=0):
        moon_phase = list(itertools.islice(self.get_daily(), 1))[day]["moon_phase"]

        if moon_phase == "New Moon":
            return "wi-moon-alt-new.png"
        elif moon_phase == "Waxing Crescent":
            return "wi-moon-alt-waxing-crescent-4.png"
        elif moon_phase == "First Quarter":
            return "wi-moon-alt-first-quarter.png"
        elif moon_phase == "Waxing Gibbous":
            return "wi-moon-alt-waxing-gibbous-4.png"
        elif moon_phase == "Full Moon":
            return "wi-moon-alt-full.png"
        elif moon_phase == "Waning Gibbous":
            return "wi-moon-alt-waning-gibbous-4.png"
        elif moon_phase == "Last Quarter":
            return "wi-moon-alt-third-quarter.png"
        else:
            return "wi-moon-alt-waning-crescent-3.png"


    def get_currently(self, *args, **kwargs):
        return self.get_weather("current", *args, **kwargs)["current"]


    def get_forecast(self, *args, **kwargs):
        for i in [0, 1, 2, 3]:
            enddt = datetime.now() + timedelta(days=i)
            v = self.get_weather(*args, **kwargs, dt=enddt.strftime("%Y-%m-%d"))["forecast"]["forecastday"][0]
            v["day"]["date"] = enddt
            yield v

    def get_hourly(self, *args, **kwargs):
        now = datetime.now().astimezone(ZoneInfo("Europe/Paris"))
        for d in self.get_forecast(*args, **kwargs):
            for h in d["hour"]:
                if d["day"]["date"].day == now.day and now > self.read_timestamp(h["time_epoch"]) + timedelta(hours=1):
                    continue
                yield h

    def get_daily(self, *args, **kwargs):
        for d in self.get_forecast(*args, **kwargs):
            yield {
                **d["day"],
                **d["astro"]
            }

    def get_alerts(self, *args, **kwargs):
        for i in [0, 1, 2, 3]:
            enddt = datetime.now() + timedelta(days=i)
            for a in self.get_weather(*args, **kwargs, dt=enddt.strftime("%Y-%m-%d"))["alerts"]["alert"]:
                yield a

    def read_timestamp(self, timestamp, *args, **kwargs):
        PARIS = ZoneInfo("Europe/Paris")
        return datetime.fromtimestamp(int(timestamp), tz=timezone.utc).astimezone(PARIS)


#WeatherAPI = TomorrowAPI

if __name__ == '__main__':
    dsa = WeatherAPI()
    print(json.dumps(dsa.get_currently()))
    #print(json.dumps([d for d in dsa.get_daily()][0]))