#!/usr/bin/python3

# needs ~/seepark.ini with
# [openweathermap]
# apikey=...
# cityid=..
# 3319578 for Obsteig, AT

from pprint import pprint
import requests
import configparser
import os
import datetime

baseurl = 'http://api.openweathermap.org/data/2.5/weather'
debug = False

def getweather(apikey, cityid):
    query = baseurl + '?units=metric&APPID={}&id={}&lang=de'.format(apikey, cityid)
    try:
        response = requests.get(query)
        if response.status_code != 200:
            response = 'N/A'
            return response
        else:
            weatherdata = response.json()
            return weatherdata
    except requests.exceptions.RequestException as error:
        print (error)
        sys.exit(1)


def fromtimestamp(timestamp, format):
    return datetime.datetime.fromtimestamp(timestamp).strftime(format)


# https://stackoverflow.com/questions/7490660/converting-wind-direction-in-angles-to-text-words
def degToCompass(num):
    if num is None:
        return 'N/A'
    val=int((num/22.5)+.5)
    arr=["N","NNO","NO","ONO","O","OSO", "SO", "SSO","S","SSW","SW","WSW","W","WNW","NW","NNW"]
    return arr[(val % 16)]


def extractweatherdata(w):
    data = dict(
        datetime = w['dt'],
        sunrise = w['sys']['sunrise'],
        sunset = w['sys']['sunset'],
        temp = w['main']['temp'],
        pressure = w['main']['pressure'],
        humidity = w['main']['humidity'],
        visibility = w['visibility'],
        weather = w['weather'][0]['description'],
        sky = w['weather'][0]['main'],
        windspeed = w['wind']['speed'],
        winddegrees = w['wind']['deg'],
        cloudiness = w['clouds']['all'],
    )

    data['sunrise_t'] = fromtimestamp(data['sunrise'], '%H:%M:%S')
    data['sunset_t'] = fromtimestamp(data['sunset'], '%H:%M:%S')
    data['date'] = fromtimestamp(data['datetime'], '%Y-%m-%d')
    data['time'] = fromtimestamp(data['datetime'], '%H:%M:%S')
    data['winddirection'] = degToCompass(data['winddegrees'])
    data['precipitation'] = w['rain']['3h'] if 'rain' in w else 'N/A'

    return data
        

def main():
    config = configparser.ConfigParser()
    config.read(os.path.expanduser('~/seewasser.ini'))
    apikey = config.get('openweathermap', 'apikey');
    cityid = config.get('openweathermap', 'cityid');

    weather_raw = getweather(apikey, cityid)
    if debug:
        pprint(weather_raw)
    weather = extractweatherdata(weather_raw)
    if debug:
        pprint(weather)
    # TODO:
    # write to db
    # write to csv
    
    # output like wetter.at.pl
    print(
        weather['date'] + ';' +
        weather['time'] + ';' +
        weather['sunrise_t'] + ';' +
        weather['sunset_t'] + ';' +
        str(weather['temp']) + ';' +
        str(weather['precipitation']) + ' mm/h;' +
        str(weather['windspeed']) + ' km/h ' + weather['winddirection'] + ';' +
        weather['weather'] + ';' +
        str(weather['cloudiness'])
    )

    
if __name__ == '__main__':
    main()