app.js

// NirveonX App Backend
const express = require("express");
const app = express();
require("dotenv").config();
const mongoose = require("mongoose");

// Middleware
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// CORS
const cors = require("cors");
app.use(
  cors({
    origin: function (origin, callback) {
      // Allow requests with no origin (mobile apps, Postman)
      if (!origin) return callback(null, true);
      callback(null, true); // Allow all origins for mobile app
    },
    credentials: true,
    methods: ["GET", "POST", "PUT", "DELETE", "OPTIONS"],
    allowedHeaders: ["Content-Type", "Authorization"],
  })
);

// Session (for Google OAuth web flow)
const session = require("express-session");
const MongoStore = require("connect-mongo");
const passport = require("passport");

const store = MongoStore.create({
  mongoUrl: process.env.MONGO_URL,
  crypto: { secret: process.env.SESSION_KEY },
  touchAfter: 24 * 3600,
});

app.use(
  session({
    store,
    secret: process.env.SESSION_KEY,
    resave: false,
    saveUninitialized: false,
    cookie: {
      secure: process.env.NODE_ENV === "production",
      httpOnly: true,
      maxAge: 1000 * 60 * 60 * 24 * 7, // 7 days
    },
  })
);

// Passport
require("./config/passport");
app.use(passport.initialize());
app.use(passport.session());

// Connect to MongoDB
async function main() {
  await mongoose.connect(process.env.MONGO_URL);
}
main()
  .then(() => console.log("✅ Connected to MongoDB"))
  .catch((err) => console.log("❌ MongoDB Error:", err));

// Routes
const authRouter = require("./router/authRouter");
const chatRouter = require("./router/chatRouter");
const messageRouter = require("./router/messageRouter");

app.use("/auth", authRouter);
app.use("/api/chats", chatRouter);
app.use("/api/messages", messageRouter);

// Health check
app.get("/", (req, res) => {
  res.json({
    status: "ok",
    app: "NirveonX App Backend",
    version: "1.0.0",
  });
});

// Error handler
app.use((err, req, res, next) => {
  console.error("Server error:", err);
  res.status(500).json({ message: "Internal server error" });
});

// Start server
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`🚀 NirveonX App Backend running on port ${PORT}`);
});