import random

def getUserChoice():
    #Ask the player to press 'a' or 'b', return only a valid response
    while True:
        choice = input("Press 'a' or 'b': ").lower()
        if choice == 'a' or choice == 'b':
            return choice
        else:
            print("Invalid input. Please press 'a' or 'b'.")

def getComputerChoice():
    #randomly select 'a' or 'b'
    #check out the useful choice() method in the random library file!
    return random.choice(['a', 'b'])

def updateScore(user, computer):
    #compares the user choice with the computer choice updates score
    global score
    
    if user == computer:
        score = score + 1
    

def evaluateScore():
    #evaluate the final score and determine the outcome.
    if score >= 7:
        return "Congratulations! You won the game!"
    else:
        return "Better luck next time! You lost."

def main():

    global score
    score = 0
    
    #Main game loop with 10 rounds
    for i in range(10):
        computerChoice = getComputerChoice()
        userChoice = getUserChoice()
        updateScore(userChoice, computerChoice)
        print(f"Computer chose: {computerChoice}")
        print(f"Current Score: {score}")

    #grab the evaluation result
    evaluation = evaluateScore()

    #display the evaluation
    print(f"{evaluation}")

#call main
main()