"""
 atm.py


  Write a program to simulate an ATM machine.
  Store balances and account info in a file.
  Use objects.

  in class May 3

"""


"""

 thinking ...
 
     put information in a file
          atm_info.txt  :

       name, password, checking_balance, savings_balance
       name2, pass2, check2, save2
       ...
       
 
  initial screen 
  
      ****************
     
        IntroCS ATM
        
      *****************

      Type your name to start your login :


      What do you want to do?
         1. Withdraw cash
         2. Transfer money
         3. See accounts

"""

datafilename = 'atm_info.txt'

class User:
    
    def __init__(self, name, password, checking, savings):
        self.name = name
        self.password = password
        self.checking = checking
        self.savings = savings

    def __str__(self):
        return f"User '{self.name}' check={self.checking} save={self.savings}"
        
class ATM:
    
    def __init__(self):
        self.users = self.read_data_from_file()   
    
    def __str__(self):
        result = "ATM "
        for user in self.users:
            result = result + '<' + str(user) + '> '
        return result
    
    def read_data_from_file(self):
        """ read in the account info from a file , return list of Users """
        users = []
        datafile = open(datafilename)
        for line in datafile:
            (name, password, checking, savings) = line.split(',')
            user = User(name, password, checking, savings)   # get user info
            users.append(user)                               # put into list
        return users
    
    def write_data_to_file(self):
        pass

    def run(self):
        """ main interactive loop """
        while True:
            self.first_screen()            # show first screen
            user = self.login()            # ask for user login
            self.session(user)             # let that user do things

    def first_screen(self):
        # display initial screen of information
        
    def login(self):
        # ask for username, loop through users to find this person
        # return the correct user
    
    def session(self, user):
        # give choices for what that user can do
            
    
class Account:
    # checkings or savings ... 
    pass

def main():
    atm = ATM()
    atm.run()
    #print(atm)

if __name__ == '__main__':
    main()