from flask import Flask, render_template, request, Response, stream_with_context
from llama_cpp import Llama
import time

app = Flask(__name__)

# Load the Llama model
print("🚀 Loading model...")
llm = Llama.from_pretrained(
    repo_id="bartowski/google_gemma-3-1b-it-GGUF",
    filename="google_gemma-3-1b-it-IQ4_XS.gguf",
)
print("✅ Model loaded!")

@app.route("/")
def home():
    print("📢 Serving index.html")
    return render_template("index.html")

@app.route("/chat", methods=["POST"])
def chat():
    user_input = request.json.get("message", "")
    print(f"💬 Received message: {user_input}")

    def generate_response():
        print("🤖 Generating response...")
        response = llm.create_chat_completion(
            messages=[{"role": "user", "content": user_input}],
            stream=True  # Enable streaming response
        )
        
        for chunk in response:
            token = chunk.get("choices", [{}])[0].get("delta", {}).get("content", "")
            if token:
                print(f"📝 Token: {token}", end="", flush=True)
                yield token  # Send token to the client
                time.sleep(0.05)  # Simulate a more natural delay

    return Response(stream_with_context(generate_response()), content_type="text/plain")

if __name__ == "__main__":
    app.run(debug=True, host="0.0.0.0", port=7860)