chatbot.py

"""
Basic Rule-Based Chatbot
Responds to a small set of predefined user inputs with fixed replies.
"""

RESPONSES = {
    "hello": "Hi! How can I help you today?",
    "hi": "Hello there!",
    "how are you": "I'm fine, thanks! How about you?",
    "what is your name": "I'm a simple rule-based chatbot.",
    "what can you do": "I can chat about a few basic things — try saying hello, asking how I am, or saying bye.",
    "thank you": "You're welcome!",
    "thanks": "You're welcome!",
    "bye": "Goodbye! Have a great day.",
}

DEFAULT_RESPONSE = "I'm not sure how to respond to that. Try saying 'hello', 'how are you', or 'bye'."
EXIT_KEYWORDS = {"bye", "exit", "quit"}


def get_response(user_input):
    cleaned = user_input.strip().lower().strip("!?.")
    return RESPONSES.get(cleaned, DEFAULT_RESPONSE)


def chat():
    print("Chatbot: Hi! Type 'bye' anytime to end the chat.\n")

    while True:
        user_input = input("You: ")
        cleaned = user_input.strip().lower().strip("!?.")

        response = get_response(user_input)
        print(f"Chatbot: {response}")

        if cleaned in EXIT_KEYWORDS:
            break


if __name__ == "__main__":
    chat()