index.js

const dotenv = require("dotenv");
dotenv.config();

const express = require("express");
const cookieParser = require("cookie-parser");
const ConnectDB = require("./src/DataBase/db");
const notesRoute = require("./src/router/notes.router");
const authRouter = require("./src/router/auth.router");

const app = express();
const PORT = process.env.PORT || 3000;

// Middleware
app.use(express.json({ limit: '10mb' }));
app.use(express.urlencoded({ extended: true }));
app.use(cookieParser());

// Connect to Database
ConnectDB();

// Routes
app.get("/", (req, res) => {
  res.status(200).json({ 
    message: "CRUD Notes API is running!", 
    version: "1.0.0",
    endpoints: {
      auth: "/api/user",
      notes: "/api/v1/notes"
    }
  });
});

// Health check endpoint for Docker
app.get("/health", (req, res) => {
  res.status(200).json({ 
    status: "healthy",
    timestamp: new Date().toISOString(),
    uptime: process.uptime(),
    environment: process.env.NODE_ENV || 'development'
  });
});

app.use("/api/v1/notes", notesRoute);
app.use("/api/user", authRouter);

// Global error handler
app.use((err, req, res, next) => {
  console.error("Global error:", err.stack);
  res.status(500).json({ error: "Something went wrong!" });
});

// Handle 404
app.use("*", (req, res) => {
  res.status(404).json({ error: "Route not found" });
});

// Start server only if this file is run directly (not imported)
if (require.main === module) {
  const server = app.listen(PORT, () => {
    console.log(`Server listening on Port ${PORT}`);
  });

  // Graceful shutdown
  process.on('SIGTERM', () => {
    console.log('SIGTERM received. Shutting down gracefully...');
    server.close(() => {
      console.log('Process terminated');
    });
  });

  process.on('SIGINT', () => {
    console.log('SIGINT received. Shutting down gracefully...');
    server.close(() => {
      console.log('Process terminated');
    });
  });
}

module.exports = app;