import random
import re
import time

class SimpleBot:
    def __init__(self):
        self.greeting_inputs = ["hello", "hi", "hey", "greetings", "sup", "what's up", "hey there"]
        self.greeting_responses = ["Hi there!", "Hello!", "Hey!", "Hi! How can I help you today?"]
        
        self.farewell_inputs = ["bye", "goodbye", "see you", "see ya", "farewell", "quit", "exit"]
        self.farewell_responses = ["Goodbye!", "See you later!", "Bye!", "Take care!"]
        
        self.unknown_responses = [
            "I'm not sure I understand. Could you rephrase that?",
            "I don't have an answer for that yet.",
            "I'm still learning. Could you try asking something else?",
            "Interesting question! I don't have that information right now."
        ]
        
        # Define response patterns
        self.responses = {
            r'my name is (.*)|i am (.*)': [
                "Nice to meet you, {}!",
                "Hello, {}! How can I help you today?"
            ],
            r'how are you|how are you doing': [
                "I'm doing well, thank you for asking!",
                "I'm great! How about you?"
            ],
            r'what is your name|who are you': [
                "I'm SimpleBot, your friendly chatbot assistant!",
                "My name is SimpleBot. How can I help you today?"
            ],
            r'what can you do|help': [
                "I can answer simple questions and have basic conversations. Try asking me something!",
                "I'm a simple chatbot that can chat with you. I'm still learning though!"
            ],
            r'what time is it|what is the time': [
                lambda: f"The current time is {time.strftime('%H:%M:%S')}."
            ],
            r'what day is it|what is the date': [
                lambda: f"Today is {time.strftime('%A, %B %d, %Y')}."
            ],
            r'thank you|thanks': [
                "You're welcome!",
                "Happy to help!",
                "Anytime!"
            ]
        }

    def respond(self, user_input):
        # Convert to lowercase
        user_input = user_input.lower().strip()
        
        # Check for greetings
        if any(greeting in user_input for greeting in self.greeting_inputs):
            return random.choice(self.greeting_responses)
        
        # Check for farewells
        if any(farewell in user_input for farewell in self.farewell_inputs):
            return random.choice(self.farewell_responses)
        
        # Check for other patterns
        for pattern, responses in self.responses.items():
            match = re.search(pattern, user_input)
            if match:
                response = random.choice(responses)
                # If response is a function, call it
                if callable(response):
                    return response()
                # Otherwise, format it with the captured group if any
                captured = next((g for g in match.groups() if g is not None), "")
                return response.format(captured)
        
        # Default response
        return random.choice(self.unknown_responses)

    def chat(self):
        print("SimpleBot: Hi! I'm SimpleBot. Type 'quit' or 'exit' to end our conversation.")
        
        while True:
            user_input = input("You: ")
            if user_input.lower() in self.farewell_inputs:
                print(f"SimpleBot: {random.choice(self.farewell_responses)}")
                break
                
            response = self.respond(user_input)
            print(f"SimpleBot: {response}")

# Create and run the bot
if __name__ == "__main__":
    bot = SimpleBot()
    bot.chat()