import random
from urllib.request import urlopen
import sys

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

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

#do they want to drill phrases first
if len(sys.argv) == 2 and sys.argv[1] == "english":
    PHRASE_FIRST = True
else:
    PHRASE_FIRST = False

#load up the words from the website
for word in urlopen(WORD_URL).readlines():
    WORDS.append(str(word.strip(),encoding="utf-8"))

def convert(snippet,phase):
        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[:]

            #fake class names
            for word in class_names:
                result = result.replace("%%%",word,1)

            #fake other names
            for word in other_names:
                result = result.replace("***",word,1)

            #fake parameter lists
            for word in param_names:
                result = result .replace("@@@",word,1)

            results.append(result)

        return results

#keep going until they hit CTRL-D
try:
    while True:
        snippets = list(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)

            input(">")
            print(f"ANSWER:{answer}\n\n")
except EOFError:
    print("\nBye")