app.py

import gradio as gr
import os
import requests

def convert_to_cpp(python_code):
    # 1. Get the API Key securely
    api_key = os.getenv("GROQ_API_KEY")
    
    if not api_key:
        return "// Error: API Key is missing. Please check your Settings!"
    
    if not python_code.strip():
        return "// Error: Please enter some Python code first."

    # 2. Setup the "Senior Developer" Persona
    url = "https://api.groq.com/openai/v1/chat/completions"
    headers = {
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json"
    }
    
    # We instruct the AI to ONLY return code, no chatting.
    system_prompt = """You are an expert C++20 developer. 
    Your task is to convert Python code into highly efficient, modern C++.
    - Use standard libraries (std::vector, std::string) where possible.
    - Include necessary headers (#include <iostream>, etc).
    - Add brief comments explaining complex translations.
    - Do NOT output markdown ticks (```cpp). Just output the raw code.
    """

    data = {
        # --- THE FIX IS HERE: UPDATED MODEL NAME ---
        "model": "llama-3.1-8b-instant", 
        # -------------------------------------------
        "messages": [
            {"role": "system", "content": system_prompt},
            {"role": "user", "content": python_code}
        ],
        "temperature": 0.2 
    }
    
    try:
        response = requests.post(url, json=data, headers=headers)
        
        if response.status_code != 200:
            return f"// API Error: {response.text}"
            
        return response.json()['choices'][0]['message']['content']
        
    except Exception as e:
        return f"// Connection Error: {str(e)}"

# 3. Build the Professional UI
with gr.Blocks(theme=gr.themes.Soft()) as app:
    gr.Markdown("# 🐍 Python to ⚡ C++ Converter")
    gr.Markdown("Transform slow Python scripts into high-performance C++ code using Llama 3.1.")
    
    with gr.Row():
        # Left side: Python Input
        with gr.Column():
            py_input = gr.Code(
                language="python", 
                label="Paste Python Code Here", 
                lines=15
            )
            convert_btn = gr.Button("Convert to C++ 🚀", variant="primary")
            
        # Right side: C++ Output
        with gr.Column():
            cpp_output = gr.Code(
                language="cpp", 
                label="C++ Result", 
                lines=15,
                interactive=False # User can copy but not edit
            )
            
    # Connect the button
    convert_btn.click(fn=convert_to_cpp, inputs=py_input, outputs=cpp_output)

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