Program 13: Implement a basic Rule-Based Chatbot.

print("=== Rule-Based Chatbot ===\n")

def chatbot_response(userInput):
    keywords_matched = []
    
    if "hi" in userInput:
        print("Chatbot: Hi!")
        keywords_matched.append("greeting")
    
    if "hello" in userInput:
        print("Chatbot: Hello!")
        keywords_matched.append("greeting")

    if "hey" in userInput:
        print("Chatbot: Hey!")
        keywords_matched.append("greeting")

    if "how are you" in userInput:
        print("Chatbot: I'm good, thank you!")
        keywords_matched.append("how are you")

    if "help" in userInput:
        print("Chatbot: Try saying hi, how are you, thanks, weather, name, or bye.")
        keywords_matched.append("help")

    if "thanks" in userInput or "thank you" in userInput:
        print("Chatbot: You're welcome!")
        keywords_matched.append("thanks")

    if "weather" in userInput:
        print("Chatbot: I hope the weather is nice!")
        keywords_matched.append("weather")

    if "name" in userInput:
        print("Chatbot: I am a simple chatbot.")
        keywords_matched.append("name")

    if "time" in userInput:
        print("Chatbot: Please check your device for the current time.")
        keywords_matched.append("time")

    if "date" in userInput:
        print("Chatbot: Please check your device for today's date.")
        keywords_matched.append("date")

    if "bye" in userInput:
        print("Chatbot: Goodbye!")
        return False  # Exit chatting

    if not keywords_matched:
        print("Chatbot: I don't understand. Try 'help'.")
    
    return True  # Continue chatting

# Main execution
print("Chatbot: Hello! Type 'bye' to exit.\n")

while True:
    userInput = input("You: ").lower()
    if not chatbot_response(userInput):
        break

class RuleChatbot:
    """Simple rule-based chatbot"""
    
    def __init__(self):
        self.rules = {
            'hello': 'Hi there! How can I help you?',
            'hi': 'Hello! What can I do for you?',
            'how are you': "I'm doing well, thank you for asking!",
            'bye': 'Goodbye! Have a great day!',
            'help': 'I can answer basic questions. Try asking about weather, time, or greetings!',
            'weather': 'I cannot check real weather, but I hope it is nice where you are!',
            'name': 'I am a simple rule-based chatbot.',
            'thanks': "You're welcome!",
            'date': 'The current date is: ' + __import__('datetime').datetime.now().strftime('%Y-%m-%d'),
            'greetings': 'Hello! How can I assist you today?'
        }
    
    def respond(self, user_input):
        user_input = user_input.lower().strip()

        if 'time' in user_input:
            return 'The current time is: ' + __import__('datetime').datetime.now().strftime('%H:%M:%S')
        
        for pattern, response in self.rules.items():
            if pattern in user_input:
                return response
        return "I'm not sure how to respond to that. Try 'help' for assistance."


chatbot = RuleChatbot()
print("Chatbot: Hello! Type 'bye' to exit.\n")

while True:
    user = input("You: ")
    
    reply = chatbot.respond(user)
    print("Chatbot:", reply)

    if "bye" in user.lower():
        break