import 'dotenv/config';
import express from 'express';
import cors from 'cors';
import helmet from 'helmet';
import morgan from 'morgan';
import rateLimit from 'express-rate-limit';

import authRoutes from './routes/auth';
import conversationRoutes from './routes/conversations';
import contactRoutes from './routes/contacts';
import messageRoutes from './routes/messages';
import taskRoutes from './routes/tasks';
import aiRoutes from './routes/ai';
import crmRoutes from './routes/crm';
import analyticsRoutes from './routes/analytics';
import adminRoutes from './routes/admin';
import extensionRoutes from './routes/extension';

const app = express();
const PORT = process.env.PORT || 3001;

// Security middleware
app.use(helmet());
app.use(cors({
  origin: process.env.FRONTEND_URL || 'http://localhost:5173',
  credentials: true,
}));

// Rate limiting
const limiter = rateLimit({
  windowMs: 1 * 60 * 1000,
  max: 120,
  standardHeaders: true,
  legacyHeaders: false,
});
app.use(limiter);

// Body parsing & logging
app.use(express.json({ limit: '10mb' }));
app.use(morgan('dev'));

// Health check
app.get('/health', (_req, res) => {
  res.json({ status: 'ok', version: '1.0.0', timestamp: new Date().toISOString() });
});

// API Routes
app.use('/api/auth', authRoutes);
app.use('/api/conversations', conversationRoutes);
app.use('/api/contacts', contactRoutes);
app.use('/api/messages', messageRoutes);
app.use('/api/tasks', taskRoutes);
app.use('/api/ai', aiRoutes);
app.use('/api/crm', crmRoutes);
app.use('/api/analytics', analyticsRoutes);
app.use('/api/admin', adminRoutes);
app.use('/api/extension', extensionRoutes);

// Error handler
app.use((err: any, _req: express.Request, res: express.Response, _next: express.NextFunction) => {
  console.error(err);
  res.status(err.status || 500).json({
    error: process.env.NODE_ENV === 'production' ? 'Internal server error' : err.message,
  });
});

// 404
app.use((_req, res) => {
  res.status(404).json({ error: 'Not found' });
});

app.listen(PORT, () => {
  console.log(`WACC Backend running on port ${PORT}`);
});