quiz

import time
import sys
username = password = choice = difficulty = grade = quiz = ""
questions = []
percentage = grade = 0

try:
    userfile = open("users.txt","r")
    userfile.close()
except IOError:
    userfile = open("users.txt","w")
    userfile.close()

def Start():
    userInput = input("Do you have an account? Y or N: ")
    if userInput in ("Y","y"):
        Login()
    elif userInput in ("N","n"):
        Register()
    else:
        print("Please enter Y or N.")
        Start()

def Register():
    global username
    global password
    name = input("Please enter your name: ")
    age = input("Please enter your age: ")
    yearGroup = input("Please enter your year group: ")
    username = name[:3] + age
    UsernameCheck()
    userfile = open("users.txt","a")
    userfile.write(username + ", ")
    userfile.close()
    userinfo = open(username + "'s info.txt","a")
    userinfo.write("username: " + username + "\n")
    userinfo.write("name: " + name + "\n")
    userinfo.write("age: " + age + "\n")
    userinfo.write("year group: " + yearGroup + "\n")
    userinfo.close()
    print("Welcome ", name, ", your username is: ", username)
    password = input("Please create a password: ")
    passwordfile = open(username + "'s password.txt","w")
    passwordfile.write(password)
    passwordfile.close()
    print("You will now be prompted to log in...")
    time.sleep(0.5)
    Login()

def UsernameCheck():
    global username
    userfile = open("users.txt","r")
    users = []
    users = userfile.readline()
    userfile.close()
    username = username.replace("/","")
    username = username.replace(":","")
    username = username.replace("\"","")
    username = username.replace("?","")
    username = username.replace("<","")
    username = username.replace(">","")
    username = username.replace("|","")
    username = username.replace("[\]","")
    while str(username) in users:
        username = username + "1"

def Login():
    global password
    global username
    givenUsername = input("Please enter your username: ")
    givenPassword = input("Please enter your password: ")
    if givenUsername == "Teacher":
        teacherpwfile = open("Teacher's password.txt","r")
        teacherpw = teacherpwfile.read()
        teacherpwfile.close()
        if givenPassword == teacherpw:
            Admin()
        else:
            print("Incorrect password. Please try again.")
            Login()
    try:
        passwordfile = open(givenUsername + "'s password.txt","r")
        password = passwordfile.read()
        passwordfile.close()
    except FileNotFoundError:
        print("Invalid username. Please try again.")
        Login()
    if givenPassword == password:
        print("Welcome, ", givenUsername)
        username = givenUsername
        Choice()
    else:
        print("Incorrect password. Please try again.")
        Login()

def Choice():
    global choice
    ResultsFileCheck()
    file = open(username + "'s results.txt","r")
    check = file.read()
    file.close()
    count = check.count("Quiz")
    if str(count) == "6":
        print("You have taken every quiz. You will now be logged out.")
        Start()
    choice = input("Would you like to do a quiz on Maths or Business? ")
    while choice not in ("Maths","Business"):
        print("Please enter Maths or Business(Capital).")
        Choice()
    Difficulty()

def Difficulty():
    global difficulty
    global choice
    global quiz
    difficulty = input("Choose a difficulty, Easy, Medium or Hard: ")
    while difficulty not in ("Easy","Medium","Hard"):
        print("Please enter Easy, Medium or Hard(Capital).")
        Difficulty()
    quiz = (choice + "Quiz" + difficulty)
    Quiz()

def LoadQs():
    global difficulty
    global questions
    global choice
    questions = []
    questionfile = open(choice + "Qs" + difficulty + ".csv","r")
    while True:
        in_line = questionfile.readline()
        if not in_line:
            break
        questions.append(in_line)
    questionfile.close()

def Grade():
    global percentage
    global grade
    if 0 <= percentage < 20:
        grade = "E"
    elif 20 <= percentage < 40:
        grade = "D"
    elif 40 <= percentage < 60:
        grade = "C"
    elif 60 <= percentage < 80:
        grade = "B"
    elif 80 <= percentage < 90:
        grade = "A"
    else:
        mathsgrade = "A*"

def ResultsFileCheck():
    global results
    global username
    try:
        results = open(username + "'s results.txt","r")
        results.close()
    except IOError:
        results = open(username + "'s results.txt","w")
        results.write("Username: " + username + "\n")
        results.close()

def Quiz():
    global quiz
    global choice
    global difficulty
    global score
    global percentage
    global grade
    global username
    global questions
    ResultsFileCheck()
    file = open(username + "'s results.txt","r")
    check = file.read()
    file.close
    if ("Quiz: " + choice + "Difficulty: " + difficulty) in check:
        print("You have already taken this quiz.")
        Choice()
    results = open(username + "'s results.txt","a")
    results.write("Quiz: " + choice + "Difficulty: " + difficulty)
    LoadQs()
    score = 0
    count = 0
    for line in questions:
        inputs = line.split(",")
        question = inputs[0]
        a = inputs[1]
        b = inputs[2]
        if "correct" in a:
            a = a.replace("correct","")
            answer = ["A","a"]
            answer2 = a
        else:
            b = b.replace("correct","")
            answer = ["B","b"]
            answer2 = b
        try:
            c = inputs[3]
        except IndexError:
            pass
        try:
            d = inputs[4]
        except IndexError:
            pass
        try:
            if "correct" in c:
                c = c.replace("correct","")
                answer = ["C","c"]
                answer2 = c
            if difficulty == "Medium":
                question = (question + " Is it A: " + a + ", B: " + b + " or C: " + c)
                correctinputs = ["A","a","B","b","C","c"]
                invalidinput = ("Please enter A, B or C.")
        except NameError:
            pass
        try:
            if "correct" in d:
                d = d.replace("correct","")
                answer = ["D","d"]
                answer2 = d
            if difficulty == "Hard":
                question = (question + " Is it A: " + a + ", B: " + b + ", C: " + c + " or D: " + d)
                correctinputs = ["A","a","B","b","C","c","D","d"]
                invalidinput = ("Please enter A, B, C or D.")
        except NameError:
            pass
        question2 = (question + " Is it A: " + a + " or B: " + b)
        correctinputs = ["A","a","B","b"]
        invalidinput = ("Please enter A or B.")
        userAnswer = input(question)
        while userAnswer not in correctinputs:
            print(invalidinput)
            userAnswer = input(question)
        if userAnswer in answer:
            print("Correct!")
            results.write("\nQuestion: " + question + "Answer: " + str(userAnswer) + " - Correct")
            score = score + 1
            count = count + 1
        else:
            print("Sorry, the answer was: ", answer2)
            count = count + 1
            results.write("\nQuestion: " + question + "Answer: " + str(userAnswer) + " - Incorrect")
    print("Your final score is: ", score)
    percentage = score / count
    percentage = percentage * 100
    totalscore = totalscore + score
    scorecount = scorecount + 1
    avgscore = totalscore / scorecount
    print("Your percentage is: ", percentage, "%")
    Grade()
    print("Your grade is: ", grade)
    try:
        quizresults = open(quiz + " - Results.txt","a")
        quizresults.write(username + ": " + str(score) + "\n")
        quizresults.close()
    except IOError:
        quizresults = open(quiz + " - Results.txt","w")
        quizresults.write(username + ": " + str(score) + "\n")
        quizresults.close()
    results.write("\nFinal score: " + str(score) + "\n")
    results.write("Grade: " + str(grade) + "\n********************\n")
    results.close()
    average = open(quiz + " - Average Score.txt","w")
    average.write(str(avgscore))
    average.close()
    Continue()

def Continue():
    ResultsFileCheck()
    check = open(username + "'s results.txt","r")
    check.read()
    check.close()
    check = str(check)
    count = check.count("Quiz")
    if str(count) == "6":
        print("You have taken every quiz. You will now be logged out.")
        Start()
    print("If you would like to do another quiz, press C.")
    print("If you would like to log out, press E.")
    print("If you would like to quit, press Q.")
    userInput = input("Please choose one of the above options to continue: ")
    while userInput not in ["C","c","E","e","Q","q"]:
        userInput = input("Please enter C, E or Q: ")
    if userInput in ["Q","q"]:
        sys.exit()
    elif userInput in ["E","e"]:
        Start()
    else:
        Choice()

def Admin():
    global users
    choice = input("Would you like to check a student's results? Y or N: ")
    if choice in ("Y","y"):
       UserReport()
    elif choice in ("N","n"):
        choice2 = input("Would you like to check the results for a quiz? Y or N: ")
        while choice2 not in ("Y","y","N","n"):
            choice2 = input("Please enter Y or N: ")
        if choice2 in ("Y","y"):
            QuizReport()
        else:
            choice3 = input("Press E to log out, or Q to quit: ")
            while choice3 not in ("E","e","Q","q"):
                choice3 = input("Please enter E or Q.")
            if choice3 in ("E","e"):
                Start()
            else:
                sys.exit()

    else:
        print("Please enter Y or N.")
        Admin()

def UserReport():
    user = input("Please enter their username: ")
    while user not in users:
        print("The username you entered does not exist. Please try again.")
        user = input("Please enter their username: ")
    try:
        report = open(user + "'s results.txt","r")
        results = report.read()
        report.close()
        print(results)
        AdminContinue()
    except IOError:
        print("This user has not completed any quizzes.")
        UserReport()

def QuizReport():
    quiz = input("Choose a quiz, Maths or Business: ")
    while quiz not in ("Maths","Business"):
        quiz = input("Please enter Maths or Business(Capital): ")
    difficulty = input("Choose a difficulty, Easy, Medium or Hard: ")
    while difficulty not in ("Easy","Medium","Hard"):
            difficulty = input("Please enter Easy, Medium or Hard(Capital): ")
    try:
        quizresults = open(quiz + "Quiz" + difficulty + " - Results.txt","r")
        average = open(quiz + "Quiz" + difficulty + " - Average Score.txt","r")
    except IOError:
        print("No one has taken this quiz yet.")
        QuizReport()
    avgscore = average.read()
    average.close()
    print("Average Score: " + avgscore)
    student_list = []
    score_list = []
    for line in quizresults:
        lines = line.split(": ")
        student = lines[0]
        score = int(lines[1])
        student_list.append(student)
        score_list.append(score)
    quizresults.close()
    top_score = max(score_list)
    top_student = student_list[score_list.index(top_score)]
    print(top_student + " achieved " + str(top_score) + ", the highest score.")
    details = open(top_student + "'s info.txt","r")
    userinfo = details.read()
    details.close()
    print("The details of this user are:")
    print(userinfo)
    AdminContinue()

def AdminContinue():
    print("If you would like to check a student's results, press S.")
    print("If you would like to check the results for a quiz, press R.")
    print("If you would like to log out, press E.")
    print("If you would like to quit, press Q")
    choice = input("Please choose one of the above options to continue: ")
    while choice not in ["S","s","R","r","E","e","Q","q"]:
        choice = input("Please enter S, R, E or Q: ")
    if choice in ["S","s"]:
        UserReport()
    elif choice in ["R","r"]:
        QuizReport()
    elif choice in ["E","e"]:
        Start()
    else:
        sys.exit()

Start()