import express from 'express';
import cors from 'cors';
import { checkConnection, query } from './db.js';

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

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

// Health Check & DB Init trigger
app.get('/api/health', async (req, res) => {
  const dbStatus = await checkConnection();
  res.json({ 
    status: 'ok', 
    database: dbStatus ? 'connected' : 'disconnected',
    timestamp: new Date().toISOString() 
  });
});

// --- API ENDPOINTS EXAMPLES (To replace Mock Data) ---

// Get All Agents
app.get('/api/agents', async (req, res) => {
  try {
    const agents = await query('SELECT * FROM agents');
    res.json(agents);
  } catch (e) {
    res.status(500).json({ error: e.message });
  }
});

// Get Tickets
app.get('/api/tickets', async (req, res) => {
  try {
    const tickets = await query('SELECT * FROM tickets ORDER BY created_at DESC');
    res.json(tickets);
  } catch (e) {
    res.status(500).json({ error: e.message });
  }
});

app.listen(PORT, () => {
  console.log(`🚀 Backend Server running on port ${PORT}`);
  checkConnection(); // Initial check
});