basic_chatbox.py

"""
Basic Chatbot
-------------
Author: Adarsh Singh
CodeAlpha Python Programming Internship – Module 1, Task 4

A simple rule-based chatbot. The user types a message, and the bot
replies based on predefined rules (keyword matching). The chat ends
when the user types 'bye'.

Concepts used: if-elif, functions, loops, input/output
"""


def get_bot_response(user_input):
    """
    Given the user's message, return an appropriate predefined reply.
    Matching is done by checking if certain keywords appear in the
    user's (lowercased) message.
    """
    message = user_input.lower().strip()

    if message == "":
        return "Sorry, I didn't catch that. Could you say something?"

    elif "hello" in message or "hi" in message or "hey" in message:
        return "Hi! How can I help you today?"

    elif "how are you" in message:
        return "I'm fine, thanks! How about you?"

    elif "your name" in message:
        return "I'm a simple rule-based chatbot built in Python."

    elif "thank" in message:
        return "You're welcome!"

    elif "bye" in message or "goodbye" in message:
        return "Goodbye! Have a great day."

    elif "help" in message:
        return "You can say things like 'hello', 'how are you', or 'bye' to chat with me."

    elif "weather" in message:
        return "I can't check live weather, but I hope it's nice where you are!"

    elif "joke" in message:
        return "Why do programmers prefer dark mode? Because light attracts bugs!"

    else:
        return "I'm not sure how to respond to that. Try saying 'help' to see what I understand."


def chat():
    print("=== Simple Chatbot ===")
    print("Type 'bye' to end the conversation.\n")

    while True:
        user_input = input("You: ")
        response = get_bot_response(user_input)
        print(f"Bot: {response}")

        if "bye" in user_input.lower() or "goodbye" in user_input.lower():
            break


if __name__ == "__main__":
    chat()