''' Purpose: provide weather forecast by accessing US Weather Service web
             service

    Usage:   user provides a zipcode

    Output:  municipality and state combo along with its current forecast
'''

# get url access capabilities from cs 1112 module
import url

# define weather.gov base query
WEATHER_GOV_QUERY = 'https://forecast.weather.gov/zipcity.php?inputstring='

# forecast delimiters
FRONT_DELIMITER = 'forecast-text">'             # text that precedes forecast

REAR_DELIMITER  = '</div>'                      # text that follows forecast 

# delimiter lengths
LENGTH_FRONT_DELIMITER = len( FRONT_DELIMITER )
LENGTH_REAR_DELIMITER  = len( REAR_DELIMITER )

# get zipcode of interest
reply = input( 'Enter zipcode: ' )
zipcode = reply.strip()                         # clean-up response

# specify complete query
query_link = WEATHER_GOV_QUERY + zipcode        

# get response from weather.gov
text = url.get_text( query_link )

# to get the forecast, we need to find it within the text

# start by finding the forecast delimiters
front_index = ...

rear_index  = ...

forecast = text[ front_index : rear_index ]                 
                                                            
print( forecast )

print()

# get the indices for the front and rear of the forecast
forecast_start = ...

forecast_rear  = ...

# ready to get and print the forecast
forecast = text[ forecast_start : forecast_rear + 1 ] 

# print the forecast
print( forecast )