import getpass
    from termcolor import colored
    from pusher import Pusher
    import pysher
    from dotenv import load_dotenv
    import os
    import json

    load_dotenv(dotenv_path='.env')

    class terminalChat():
        pusher = None
        channel = None
        chatroom = None
        clientPusher = None
        user = None
        users = {
            "samuel": "samuel'spassword",
            "daniel": "daniel'spassword",
            "tobi": "tobi'spassword",
            "sarah": "sarah'spassword"
        }
        chatrooms = ["sports", "general", "education", "health", "technology"]

        ''' The entry point of the application'''
        def main(self):
            self.login()
            self.selectChatroom()
            while True:
                self.getInput()

        ''' This function handles logon to the system. In a real world app,
        you might need to connect to API's or a database to verify users '''

        def login(self):
            username = input("Please enter your username: ")
            password = getpass.getpass("Please enter %s's Password:" % username)
            if username in self.users:
                if self.users[username] == password:
                    self.user = username
                else:
                    print(colored("Your password is incorrect", "red"))
                    self.login()
            else:
                print(colored("Your username is incorrect", "red"))
                self.login()

        ''' This function is used to select which chatroom you would like to connect to '''
        def selectChatroom(self):
            print(colored("Info! Available chatrooms are %s" % str(self.chatrooms), "blue"))
            chatroom = input(colored("Please select a chatroom: ", "green"))
            if chatroom in self.chatrooms:
                self.chatroom = chatroom
                self.initPusher()
            else:
                print(colored("No such chatroom in our list", "red"))
                self.selectChatroom()

        ''' This function initializes both the Http server Pusher as well as the clientPusher'''
        def initPusher(self):
            self.pusher = Pusher(app_id=os.getenv('PUSHER_APP_ID', None), key=os.getenv('PUSHER_APP_KEY', None), secret=os.getenv('PUSHER_APP_SECRET', None), cluster=os.getenv('PUSHER_APP_CLUSTER', None))
            self.clientPusher = pysher.Pusher(os.getenv('PUSHER_APP_KEY', None), os.getenv('PUSHER_APP_CLUSTER', None))
            self.clientPusher.connection.bind('pusher:connection_established', self.connectHandler)
            self.clientPusher.connect()

        ''' This function is called once pusher has successfully established a connection'''
        def connectHandler(self, data):
            self.channel = self.clientPusher.subscribe(self.chatroom)
            self.channel.bind('newmessage', self.pusherCallback)

        ''' This function is called once pusher receives a new event '''
        def pusherCallback(self, message):
            message = json.loads(message)
            if message['user'] != self.user:
                print(colored("{}: {}".format(message['user'], message['message']), "blue"))
                print(colored("{}: ".format(self.user), "green"))

        ''' This function is used to get the user's current message '''
        def getInput(self):
            message = input(colored("{}: ".format(self.user), "green"))
            self.pusher.trigger(self.chatroom, u'newmessage', {"user": self.user, "message": message})


    if __name__ == "__main__":
        terminalChat().main()