import random
from urllib import urlopen
import sys

WORD_URL = "http://learncodethehardway.org/words.txt"
WORDS = []

PHRASES = {
    "class %%%(%%%):":
      "Make a class name %%% that is-a %%%.",
    "class %%%(object):\n\tdef __init__(self, ***)" :
      "class %%% has-a __init__ that takes self and *** parameters.",
    "class %%%(object):\n\tdef ***(self, @@@)":
      "class %%% has-a function named *** that takes self and @@@ parameters.",
    "*** = %%%()":
      "Set *** to an instance of class %%%.",
    "***.***(@@@)":
      "From *** get the *** attribute and set it to '***'.",
    "***.*** = '***'.":
      "From *** get the *** attribute and set it to '***'."
}

PHRASE_FIRST = False
if len(sys.argv) == 2 and sys.argv[1] == "english":
    PHRASE_FIRST = True

for word in urlopen(WORD_URL).readlines():
    WORDS.append(word.strip())

def convert(snippet, phrase):
    class_names = [w.capitalize() for w in
                  random.sample(WORDS, snippet.count("%%%"))]
    other_names = random.sample(WORDS, snippet.count("***"))
    results = []
    param_names = []

    for i in range(0, snippet.count("@@@")):
        param_count = random.randint(1,3)
        param_names.append(', '.join(random.sample(WORDS, param_count)))

    for sentence in snippet, phrase:
        result = sentence[:]

        for word in class_names:
            result = result.replace("%%%", word, 1)

        for word in other_names:
            result = result.replace("***", word, 1)

        for word in param_names:
            result = result.replace("@@@", word, 1)

        results.append(result)

    return results

try:
  while True:
    snippets = PHRASES.keys()
    random.shuffle(snippets)

    for snippet in snippets:
      phrase = PHRASES[snippet]
      question, answer = convert(snippet, phrase)
      if PHRASE_FIRST:
        question, answer = answer, question

      print question

      raw_input("> ")
      print "ANSWER: %s\n\n" % answer
except EOFError:
  print "\nBye"
