''' Purpose: translate user text to English
'''

# get access to url support
import url

# CS 1112 translation dictionary -- entries are of form: word,translation
BABEL_FISH_URL = "http://www.cs.virginia.edu/~cs1112/words/babelfish"

# delimiters for unknown words
UNKNOWN_WORD_DELIMITER = "_"

# get contents of babel fish url as a dictionary
babelfish_dictionary = url.get_dictionary( BABEL_FISH_URL )
# this is the formatted dictionary obtained from the web and processed through the url module
# { 'foreign word' : 'english translation' }
# print( 'babelfish_dictionary =', babelfish_dictionary )

# get the user text to be translated
reply = input( "Enter phrase to be translated: " )

# convert reply into a list of words
words_to_be_translated = reply.split()

# initialize translation accumulator
# look at each word in the input sentence, find the translation, and then add the translation to our new sentence
# which is a string
translation = ''  # start with the empty string

# process the words for translation one by one. each word contributes to the translation
# for each word in the input sentence that has been split into a list of words
for current_word in words_to_be_translated :
    # whether current word is in the dictionary, determines our translation action
    # need to check whether current_word is in the dictionary
    if ( current_word in babelfish_dictionary ): # if current_word is in babelfish_dictionary
        # get the translation from the dictionary
        output_word = babelfish_dictionary.get( current_word )

    else: # if current_word is not in the dictionary
        # we need to take care of the words that don't exist in the dictionary
        #   we need surround the same word with underscores (our UNKNOWN_WORD_DELIMITER)
        output_word = UNKNOWN_WORD_DELIMITER + current_word + UNKNOWN_WORD_DELIMITER

    # here, we have our output_word that we want to add to our translated sentence
    # update the string accumulator <translation>
    translation = translation + output_word + ' '   # add a space after the output so that the words aren't right
                                                    # next to each other

    # print translation
    print( translation )