# File:    validPassword.py
# Author:  Dr. Gibson
# Date:    9/27/2017
# Section: N/A
# E-mail:  k.gibson@umbc.edu 
# Description:
#   This file contains python code that asks the user to
#   enter a password, with specific requirements needed
#   in order for the password to be valid

MIN_LEN = 8      # minimum length of password
MAX_LEN = 20     # maximum length of password

def main():

    #set up the boolean flag
    passwordValid = False
    
    # this will evaluate to True as long as the password is NOT valid
    while not passwordValid:

        # get the password and assume (for now) that it's valid
        password = input("Please enter a password: ")
        passwordValid = True

        # we haven't covered this yet, but this is how string length is done
        passLen = len(password)
        
        # if the password is too short, it's invalid
        if passLen < MIN_LEN:
            print("Your password is too short.")
            passwordValid = False

        # if the password is too long, it's invalid
        if passLen > MAX_LEN:
            print("Your password is too long.")
            passwordValid = False
            
        # if none of these conditionals was True, then passwordValid
        # will still be True, and the while loop will exit

    # exited the while loop, so print out the chosen password
    print("Thanks for picking the super-secure password", password)

main()