index.js

import express from "express";
import cors from "cors";
import path from "path";
import { API_KEY, MODEL_NAME } from "./config.js";

const app = express();
const port = 3001;
const __dirname = path.resolve();

app.use(cors());
app.use(express.json());

// Serve HTML
app.get("/", (req, res) => {
  res.sendFile(path.join(__dirname, "index.html"));
});

// AI Endpoint
app.post("/ask", async (req, res) => {
  const { question, language } = req.body;
  
  console.log(`📨 Question: "${question}" | Language: ${language}`);

  // The Magic Prompt
  const prompt = `
    You are Bureaucracy Copilot, an expert in Indian government processes.
    
    Task: Explain the following process simply, step-by-step.
    Format: Use clear headings, bullet points, and bold text for important documents.
    Target Audience: A beginner who doesn't understand legal words.
    
    IMPORTANT: Write the ENTIRE response in ${language}.
    
    User Question: ${question}
  `;

  const url = `https://generativelanguage.googleapis.com/v1beta/models/${MODEL_NAME}:generateContent?key=${API_KEY}`;

  try {
    const response = await fetch(url, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        contents: [{ parts: [{ text: prompt }] }]
      }),
    });

    const data = await response.json();

    if (!response.ok) {
      console.error("❌ Google Error:", data);
      return res.status(500).json({ error: data.error?.message || "AI Error" });
    }

    const answer = data.candidates[0].content.parts[0].text;
    console.log("✅ AI Answered in " + language);
    
    res.json({ result: answer });

  } catch (error) {
    console.error("🔥 Server Error:", error);
    res.status(500).json({ error: "Internal Server Error" });
  }
});

app.listen(port, () => {
  console.log(`\n🚀 Bureaucracy Copilot V3 is Live!`);
  console.log(`👉 http://localhost:${port}\n`);
});