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

# default dictionary location -- its entries are of form: word,translation
DEFAULT_URL = 'http://www.cs.virginia.edu/~cs1112/datasets/words/babelfish'

# get contents of the url as the default dictionary
DEFAULT_DICTIONARY = url.get_dictionary( DEFAULT_URL )

def glot( text, dictionary = DEFAULT_DICTIONARY ) :
    ''' Returns a translation of text according to dictionary,
        where text may have embedded \n's
    '''

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

    txet = ''                           # initialize accumulator

    for row in text :                   # need to process each row of the text

        wor = line( row, dictionary )   # call line() on row to translate it

        txet = txet + wor + '\n'        # add translation to the accumulator
                                        # along with a line break

    return txet                         # return translation

def line( string, dictionary = DEFAULT_DICTIONARY ) :
    ''' Returns a translation of string according to dictionary,
        where string is composed of multiple words
    '''

    words = string.split()              # split string into list of words

    sdrow = ''                          # initialize accumulator

    for w in words :                    # need to process each word

        m = word( w, dictionary )       # call word() on w to translate it

        sdrow = sdrow + m + ' '         # add translation to the accumulator

    return  sdrow                       # return translation


def word( string, dictionary = DEFAULT_DICTIONARY ) :
    ''' Returns a translation of the word string according to dictionary.
        if the translation is unknown return the word within <>
    '''

    w = string.strip()                    # clean up word

    if ( w in dictionary.keys() ) :       # check if word is known

        m  = dictionary.get( string )     # it is, so translate it

    else :                                # otherwise, it is not

        m = '<' + w + '>'                 # word is flagged

    return m                              # return translation

if ( __name__ == '__main__' ) :
    print( word( 'lapiz' ) )
    print()

    print( line( 'como esta eso' ) )
    print()

    print( glot( 'tun vous savez hvor\nmi pencil ist' ) )
    print()

    DIGIT_URL = 'http://www.cs.virginia.edu/~cs1112/words/digits'

    d = url.get_dictionary( DIGIT_URL )

    print( glot( '0 O 1 2 3 4 5', dictionary = d ) )