import gradio as gr
import random
import time

# Dummy knowledge base
FAQ = {
    "hello": ["Hi there!", "Hello! How can I help you?"],
    "bye": ["Goodbye 👋", "See you soon!"],
    "help": ["Ask me anything about our products.", "Try typing 'pricing' or 'features'."],
    "pricing": ["Our plans start at $9/month.", "Check the website for the latest pricing."],
    "features": ["We support file uploads, integrations, and real-time sync.", "Explore the docs for the full list."],
}

def respond(message: str, history: list[tuple[str, str]]):
    """Return a response based on simple keyword matching."""
    message = message.strip().lower()
    response = None

    # Simple keyword lookup
    for key in FAQ:
        if key in message:
            response = random.choice(FAQ[key])
            break

    # Fallback
    response = response or "I'm not sure how to answer that. Could you rephrase?"

    # Simulate typing delay
    time.sleep(random.uniform(0.3, 1.2))
    return response

# Build and launch the interface
demo = gr.ChatInterface(
    fn=respond,
    title="Simple FAQ Bot",
    description="Ask me about pricing, features, or just say hello!",
    theme="soft",
    examples=["hello", "pricing", "features"],
)

if __name__ == "__main__":
    demo.launch()