# File:    moWePins.py
# Author:  Dr. Gibson
# Date:    11/14/2016
# Section: N/A
# E-mail:  k.gibson@umbc.edu 
# Description:
#   This file contains python code that creates and stores
#   randomly-generated pins for users.

import random

QUIT1 = "quit"
QUIT2 = "exit"
MIN_PIN = 0
MAX_PIN = 9999

def main():

    # seed with system time (the default)
    random.seed()
    passes = {}
    
    # message that will be printed to the user
    msg = "Please enter a username for the system\n" + \
        "Or choose '" + QUIT1 + "' or '" + QUIT2 + "' to quit."

    userChoice = input(msg)

    while userChoice != QUIT1 and userChoice != QUIT2:
        
        # the username already exists in the dictionary
        if passes.get(userChoice) != None:
            print("The PIN for", userChoice, "is", passes[userChoice] )
        # the username DOESN'T already exist
        else:
            # randomly generate a PIN for the user
            newPin = random.randrange(MIN_PIN, MAX_PIN + 1, 1)
            passes[userChoice] = newPin
            print("The PIN for new user", userChoice, \
                      "is", passes[userChoice] )

        # get new input
        userChoice = input(msg)

    #print(passes)

main()