// Main entry point for VerifyIndia API

require('dotenv').config();

const express = require('express');
const helmet = require('helmet');
const cors = require('cors');
const morgan = require('morgan');

const { connectDB } = require('./database/connection');

const authRoutes = require('./routes/auth');
const ifscRoutes = require('./routes/ifsc');
const pincodeRoutes = require('./routes/pincode');
const gstRoutes = require('./routes/gst');
const panRoutes = require('./routes/pan');
console.log('✅ PAN routes loaded:', typeof panRoutes);
const bankRoutes = require('./routes/bank');
const userRoutes = require('./routes/user');

const { errorHandler } = require('./middleware/errorHandler');

const app = express();

app.use(helmet());
app.use(cors());

// JSON body parser with error handling
app.use(express.json({
  limit: '10mb',
  verify: (req, res, buf) => {
    try {
      JSON.parse(buf);
    } catch (e) {
      console.error('JSON parse error:', e.message);
      res.status(400).json({
        success: false,
        error: { code: 'INVALID_JSON', message: 'Invalid JSON in request body' }
      });
    }
  }
}));

// Debug middleware to log all requests
app.use((req, res, next) => {
  console.log(`[${new Date().toISOString()}] ${req.method} ${req.originalUrl}`);
  console.log('Headers:', req.headers);
  console.log('Body:', req.body);
  next();
});

app.use(morgan('combined'));

app.get('/health', (req, res) => {
  res.json({ status: 'healthy', timestamp: new Date().toISOString() });
});

app.get('/', (req, res) => {
  res.json({
    message: 'VerifyIndia API',
    version: 'v1',
    endpoints: {
      ifsc: '/v1/ifsc/:ifsc_code',
      pincode: '/v1/pincode/:pincode',
      gst: '/v1/gst/verify/:gstin',
      pan: '/v1/pan/verify',
      bank: '/v1/bank/verify'
    }
  });
});

app.use('/v1/auth', authRoutes);
app.use('/v1/user', userRoutes);
app.use('/v1/ifsc', ifscRoutes);
app.use('/v1/pincode', pincodeRoutes);
app.use('/v1/gst', gstRoutes);

// Test route to verify routing works (must be BEFORE panRoutes)
app.get('/v1/pan/test', (req, res) => {
  console.log('PAN test route hit!');
  res.json({ message: 'PAN route is working', timestamp: new Date().toISOString() });
});

// Log all registered routes for debugging
console.log('Registering PAN routes at /v1/pan');
app.use('/v1/pan', panRoutes);
console.log('PAN routes registered');

app.use('/v1/bank', bankRoutes);

app.use('*', (req, res) => {
  res.status(404).json({
    success: false,
    error: { code: 'NOT_FOUND', message: `Route ${req.originalUrl} not found` }
  });
});

app.use(errorHandler);

const PORT = process.env.PORT || 3000;


async function startServer() {
  try {
    await connectDB();
    console.log('✅ PostgreSQL connected');
    
    // // Try to connect Redis, but don't fail if it's not available
    // try {
    //   const { connectRedis, isDummyCache } = require('./cache/redis');
    //   await connectRedis();
    //   if (isDummyCache()) {
    //     console.log('📦 Using in-memory cache (Redis not available)');
    //   } else {
    //     console.log('✅ Redis connected');
    //   }
    // } catch (redisError) {
    //   console.log('📦 Using in-memory cache (Redis connection failed)');
    // }
    
    app.listen(PORT, () => {
      console.log(`✅ Server running on port ${PORT}`);
    });
  } catch (error) {
    console.error('❌ Failed to start:', error);
    process.exit(1);
  }
}

startServer();