Basic Chatbot.py

def get_bot_response(user_input):
    """
    Analyzes the user's input and returns a predefined response
    using simple rule-based string matching and if-elif-else logic.
    """
    # Convert input to lowercase and strip whitespace for consistent matching
    cleaned_input = user_input.strip().lower()

    # Rule 1: Greetings
    if cleaned_input in ["hello", "hi", "hey", "greetings"]:
        return "Hi there! I am a rule-based chatbot. How can I help you today? 😊"

    # Rule 2: Well-being check
    elif cleaned_input in ["how are you", "how's it going", "how are you doing"]:
        return "I'm doing great, thank you for asking! I hope you're having a wonderful day! ✨"

    # Rule 3: Identifying the chatbot
    elif "your name" in cleaned_input or "who are you" in cleaned_input:
        return "I am ChatBot v1.0, a simple rule-based assistant programmed to chat with you!"

    # Rule 4: Asking for help or instructions
    elif "help" in cleaned_input or "what can you do" in cleaned_input:
        return (
            "I'm a basic chatbot! You can say things like:\n"
            "   - 'hello'\n"
            "   - 'how are you'\n"
            "   - 'tell me a joke'\n"
            "   - 'bye' (to exit)"
        )

    # Rule 5: Entertainment (A simple joke)
    elif "joke" in cleaned_input or "laugh" in cleaned_input:
        return (
            "Why don't scientists trust atoms?\n"
            "🤖 Because they make up everything!"
        )

    # Rule 6: Farewells
    elif cleaned_input in ["bye", "goodbye", "exit", "quit"]:
        return "Goodbye! Have an amazing day ahead! 👋"

    # Fallback Rule: For unrecognized inputs
    else:
        return "Hmm, I'm not sure I understand that. Try asking 'help' to see what I can do!"


def run_chatbot():
    """
    Main controller loop that handles terminal input and output.
    """
    print("==================================================")
    print("        WELCOME TO THE RULE-BASED CHATBOT         ")
    print("==================================================")
    print("Instruction: Type your message below and press Enter.")
    print("             Type 'bye' to exit the conversation.\n")

    # Start the conversation loop
    while True:
        # Fetch input from the terminal
        user_input = input("You: ")
        
        # Guard clause for empty or whitespace-only inputs
        if not user_input.strip():
            print("Chatbot: Please type something so we can chat!\n")
            continue

        # Fetch the predefined rule response
        bot_response = get_bot_response(user_input)
        
        # Display response
        print(f"Chatbot: {bot_response}\n")

        # Break the loop if the user said goodbye
        cleaned_input = user_input.strip().lower()
        if cleaned_input in ["bye", "goodbye", "exit", "quit"]:
            break

    print("==================================================")
    print("             CONVERSATION TERMINATED              ")
    print("==================================================")


# Ensure the script runs when executed directly
if __name__ == "__main__":
    run_chatbot()