import os
import streamlit as st
try:
    import google.generativeai as genai
except ImportError:
    genai = None

def get_gemini_api_key():
    if hasattr(st.secrets, "GEMINI_API_KEY"):
        return st.secrets["GEMINI_API_KEY"]
    return os.getenv("GEMINI_API_KEY")

def gemini_generate_code(prompt, model="gemini-1.5-pro"):
    api_key = get_gemini_api_key()
    if not api_key:
        raise RuntimeError("Gemini API key not set!")
    if genai is None:
        raise ImportError("Please install google-generativeai!")
    genai.configure(api_key=api_key)
    model_obj = genai.GenerativeModel(model)
    response = model_obj.generate_content(prompt)
    return response.text if hasattr(response, "text") else str(response)

def gemini_explain_code(code, model="gemini-1.5-pro"):
    # Ask Gemini to explain code in plain English
    explanation_prompt = (
        "Explain step-by-step, in clear language, what this Python MCP server code does, and draw a high-level block diagram in Mermaid format:\n\n" +
        code
    )
    return gemini_generate_code(explanation_prompt, model)