#!/usr/bin/python3
import RPi.GPIO as GPIO
import time, os, threading, urllib.request, json

#------------------------------------------------------------------------

city = "Duisburg&APPID=xxxxxxxxxxxxxxx"
updateEvery = 300 #sec
runTime = 120 #sec
pir_pin = 18

#------------------------------------------------------------------------

GPIO.setmode(GPIO.BCM)
GPIO.setup(pir_pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

# define dictionary http://www.tutorialspoint.com/python/python_dictionary.htm
dictionary = {}

def getForecast(city):
    url = "http://api.openweathermap.org/data/2.5/forecast/daily?cnt=1&units=metric&mode=json&q="
    url = url + city
    req = urllib.request.Request(url)
    response=urllib.request.urlopen(req)
    return json.loads(response.read().decode("UTF-8"))

def updateWeatherData(period):
    if dictionary['update'] == True:
        dictionary['forecast'] = getForecast(city)
        timedDataUpdate = threading.Timer( period, updateWeatherData, [period] )
        timedDataUpdate.start()

def displayWeather():
    for day in dictionary['forecast']['list']:
        wetter_id=day['weather'][0]['id']
        humidity=day['humidity']
        temp_min=day['temp']['min']
        temp_max=day['temp']['max']
        temp_morning=day['temp']['morn']
        temp_evening=day['temp']['eve']
        temp=(temp_min + temp_max + temp_morning + temp_evening) / 4.0
        wind_speed=day['speed']
    #calculating the felt temperature
    if (temp >= 26.7) and (humidity >= 40):
        temp=float(-8.784695+(1.61139411*temp)+(2.338549*humidity)+(-0.14611605*temp*humidity)+(-1.2308094e-2*temp*temp)+(-1.6424828e-2*humidity*humidity)+(2.211732e-3*temp*temp*humidity)+(7.2546e-4*temp*humidity*humidity)+ (-3.582e-6*temp*temp*humidity*humidity))
    elif temp <=10.0:
        temp=float(13.12 + (0.6215 * temp) - (11.37 * wind_speed ** .16) + (.3965 * temp * wind_speed ** .16))
    #bad weather colors
    if wetter_id >= 600 and wetter_id<= 622:
        os.system("irsend SEND_ONCE Led WHITE")#Snow
    elif (wetter_id >= 300 and wetter_id<= 321) or (wetter_id >=200 and wetter_id <=232) or (wetter_id >=500 and wetter_id<=531):
        os.system("irsend SEND_ONCE Led VIOLETT")#Rain
    elif wetter_id==232 or wetter_id==212 or wetter_id==202 or wetter_id==502 or wetter_id==503 or wetter_id==504 or wetter_id==602 or wetter_id==622 or wetter_id==771 or wetter_id==781 or wetter_id>=950:
        os.system("irsend SEND_ONCE Led STROBE")#heavy Storm, alarm function
    #temperature colors
    #improvements:
    #fix the temperature scale to get better results in human felt temperature, like green. 17 degrees can be a bit cold and 26 hot
    #maybe i could use 12V WS2801 Modules and show the results like a clock, like 3:00, 6:00, 9:00, 12:00.
    #my idea is to put it inside an small ribba case, but on the downside this thing maybe can't light a small room in the dark
    elif temp <=-5:
        os.system("irsend SEND_ONCE Led BLUE_5")#darker blue
    elif temp >=-5 and temp <=0:
        os.system("irsend SEND_ONCE Led BLUE_4")
    elif temp >=0 and temp <=5:
        os.system("irsend SEND_ONCE Led BLUE_3")
    elif temp >=5 and temp <=10:
        os.system("irsend SEND_ONCE Led BLUE_2")
    elif temp >=10 and temp <=12.5:
        os.system("irsend SEND_ONCE Led BLUE_1")
    elif temp >=12.5 and temp <=17:
        os.system("irsend SEND_ONCE Led GREEN_1")
    elif temp >=17 and temp <=23:
        os.system("irsend SEND_ONCE Led GREEN_2")
    elif temp >=23 and temp <=26:
        os.system("irsend SEND_ONCE Led RED_1")#yellow
    elif temp >=26 and temp <=29:
        os.system("irsend SEND_ONCE Led RED_2")#orange
    elif temp >=29 and temp <=32:
        os.system("irsend SEND_ONCE Led RED_2")#orange
    elif temp >=32 and temp <=35:
        os.system("irsend SEND_ONCE Led RED_2")#orange
    elif temp >=35 and temp <=38:
        os.system("irsend SEND_ONCE Led RED_2")#red
    else:
        os.system("irsend SEND_ONCE Led PINK")#violet

def interrupt_event(pin):
    if dictionary['running'] == False:
        dictionary['running'] = True
        dictionary['startTime'] = time.time()
        displayWeather_thread = threading.Thread(target=displayWeather)
        displayWeather_thread.start()
    elif dictionary['running'] == True:
        dictionary['startTime'] = time.time()

def main():
    dictionary['forecast'] = getForecast(city)
    dictionary['update'] = True
    dictionary['running'] = False
    dictionary['startTime'] = 0
    timedDataUpdate = threading.Timer( float(updateEvery), updateWeatherData, [float(updateEvery)] )
    timedDataUpdate.start()
    GPIO.add_event_detect(pir_pin, GPIO.RISING, callback=interrupt_event)
    while True:
        time.sleep(1)
        diff = time.time() - dictionary['startTime']
        if diff >= runTime:
            dictionary['running'] = False
            os.system("irsend SEND_ONCE Led OFF")


if __name__ == '__main__':
    try:
        main()
    except (KeyboardInterrupt, SystemExit):
        print("\nQuit\n")
        dictionary['update'] = False
        GPIO.cleanup()