""" Purpose: translate user text to English
"""

import url

DEFAULT_URL = 'http://www.cs.virginia.edu/~cs1112/words/babel'

DEFAULT_DICTIONARY = url.get_dictionary( DEFAULT_URL )

def passage( text, dictionary = DEFAULT_DICTIONARY) :
    """ returns a string translation of text according to dictionary, where
        text may have embedded \n's
    """

    lines = text.split( "\n" )                # split text into a list of lines

    result = ""                               # result to be an accumulation of line translations

    for string in lines :
        translation = line( string, dictionary )
        result = result + translation + "\n"  # add translation to result

    return result                             # return accumulated translations


def line( text, dictionary = DEFAULT_DICTIONARY ) :
    """ returns a translation of text according to dictionary, where
        text is composed of zero or more words
    """

    words = text.split()                      # split text into a list of words

    result = ""                               # result to be an accumulation of word translations

    for string in words :
        translation = word( string, dictionary )  # we can call word() here to get the translation or flag each word
        result = result + translation + " "   # add translation to result
    
    return result

def word( string, dictionary = DEFAULT_DICTIONARY) :
    """ returns a translation of the string according to dictionary,
        where string is composed of a single word.  if the translation
        is unknown the function return the word within <>
    """
    # print( dictionary ) adding print() statements is a great way to figure out what's happening
    if ( string in dictionary ) :             # do we know what the word translates to
        result = dictionary.get( string )     # yes: so it is our result
    else :
        result = "<" + string + ">"           # no:  so flag it for the result

    return result                             # return the translation

if ( __name__ == '__main__' ) :
    # test translating a single word
    translation = word( 'lapiz' )             
    print( translation )
    print()

    # test translating a single line
    translation = line( 'como esta eso' )     
    print( translation )
    print()

    # test translating two lines
    translation = passage( 'tun vous savez hvor\nmi pencil ist' )
    print( translation )
    print()


    # test translating a passage
    text = """ dubailte dubailte kesusahan und guaio
               umlilo adolebitque und ketel bombolla
               umucu di una pantanoso neidr
               dans der ketel bouyi und cuire
               oog di tritons und kaki di rano
               yun di fledermoyz und lingua di chien
               viperae foarke und blyn cuc stik
               moo fotur und ovlet tis
               pre eng viehatys di voimakas guaio
               mag un inferno salda bouyi und bombolla
    """

    translation = passage( text )
    print( translation )

    # test translating with a non-default dictionary
    digits = { '0': 'zero', '1': 'one', '2': 'two', '3': 'three', '4': 'four', '5': 'five', '6': 'six', '7': 'seven', '8': 'eight', '9': 'nine' }

    translation =  passage( 'O \n 0 1 2 3 4 5', dictionary = digits )
    print( translation )
    print()