# By Heidi Newton

from random import randrange

quiz_questions= []
quiz_answers = []

#This is the highest level method, that controls the overall game.
#It loops around printing random quiz questions for the user to answer.
def run_game():
    read_quiz_into_lists()
    print_intro()
    while True:
        print("################################")
        question_id = randrange(0, len(quiz_questions))  
        do_question(question_id)
        print("################################")

def print_intro():
    print("Welcome to the great quiz game!")
    print("You will be presented with a series of multiple choice questions")
    print("Enter the letter corresponding to the answer you think is right")
    #print("You can quit at any time by entering 'Q' instead of an answer letter\n")

#This method reads the quiz into the lists.
def read_quiz_into_lists():
    global quiz_questions, quiz_answers
    questions_file = open("questions.txt", "r")
    while True :
        next_question_line = questions_file.readline().rstrip()
        if not next_question_line :
            break
        quiz_questions.append(next_question_line)
        next_answer_line = questions_file.readline().rstrip()
        quiz_answers.append(next_answer_line)

#This method processes one question
#It has 3 support methods (though it could be done as just one method)
def do_question(question_id):
    display_question(question_id)
    user_answer = get_answer_from_user()
    check_answer(question_id, user_answer)

#Displays the question specified by the ID number
def display_question(question_id):
    print(quiz_questions[question_id] + "\n")

def get_answer_from_user():
    answer_from_user = input("Answer: ")
    return answer_from_user

#Checks whether or not the user answer is the answer for this question
#prints a message to tell the user whether or not it is
#If it is not, it prints what the correct answer was.
def check_answer(question_id, user_answer):
    global quiz_answers
    if quiz_answers[question_id] == user_answer:
        print("Congratulations, you are correct!")
    else:
        print("Sorry, but the answer was " + quiz_answers[question_id])


run_game()