import { Router } from 'express';
import { authMiddleware, requireRole } from '../auth/middleware';
import { pool } from '../db/pool';
import { testProxy, addProxy, addProxiesFromList } from '../services/proxy';
import { createProxyTestJob, getProxyTestJob, getActiveProxyTestJob, cancelProxyTestJob, ProxyTestMode } from '../services/proxyTestQueue';

const router = Router();
router.use(authMiddleware);

// Get all proxies
router.get('/', async (req, res) => {
  try {
    const result = await pool.query(`
      SELECT id, host, port, protocol, username, password, active, is_anonymous,
             last_tested_at, test_result, response_time_ms, created_at,
             city, state, country, country_code, location_updated_at,
             COALESCE(max_connections, 1) as max_connections
      FROM proxies
      ORDER BY created_at DESC
    `);

    res.json({ proxies: result.rows });
  } catch (error) {
    console.error('Error fetching proxies:', error);
    res.status(500).json({ error: 'Failed to fetch proxies' });
  }
});

// Get active proxy test job (must be before /:id route)
router.get('/test-job', async (req, res) => {
  try {
    const job = await getActiveProxyTestJob();
    res.json({ job });
  } catch (error) {
    console.error('Error fetching active job:', error);
    res.status(500).json({ error: 'Failed to fetch active job' });
  }
});

// Get proxy test job status (must be before /:id route)
router.get('/test-job/:jobId', async (req, res) => {
  try {
    const { jobId } = req.params;
    const job = await getProxyTestJob(parseInt(jobId));

    if (!job) {
      return res.status(404).json({ error: 'Job not found' });
    }

    res.json({ job });
  } catch (error) {
    console.error('Error fetching job status:', error);
    res.status(500).json({ error: 'Failed to fetch job status' });
  }
});

// Get single proxy
router.get('/:id', async (req, res) => {
  try {
    const { id } = req.params;
    
    const result = await pool.query(`
      SELECT id, host, port, protocol, username, active, is_anonymous,
             last_tested_at, test_result, response_time_ms, created_at
      FROM proxies
      WHERE id = $1
    `, [id]);
    
    if (result.rows.length === 0) {
      return res.status(404).json({ error: 'Proxy not found' });
    }
    
    res.json({ proxy: result.rows[0] });
  } catch (error) {
    console.error('Error fetching proxy:', error);
    res.status(500).json({ error: 'Failed to fetch proxy' });
  }
});

// Add single proxy
router.post('/', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { host, port, protocol, username, password } = req.body;
    
    if (!host || !port || !protocol) {
      return res.status(400).json({ error: 'Host, port, and protocol required' });
    }
    
    // Test and add proxy
    const proxyId = await addProxy(host, port, protocol, username, password);
    
    const result = await pool.query(`
      SELECT * FROM proxies WHERE id = $1
    `, [proxyId]);
    
    res.status(201).json({ proxy: result.rows[0] });
  } catch (error: any) {
    console.error('Error adding proxy:', error);
    res.status(400).json({ error: error.message || 'Failed to add proxy' });
  }
});

// Add multiple proxies
router.post('/bulk', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { proxies } = req.body;
    
    if (!proxies || !Array.isArray(proxies)) {
      return res.status(400).json({ error: 'Proxies array required' });
    }
    
    const result = await addProxiesFromList(proxies);
    
    res.status(201).json(result);
  } catch (error) {
    console.error('Error adding proxies:', error);
    res.status(500).json({ error: 'Failed to add proxies' });
  }
});

// Test single proxy
router.post('/:id/test', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { id } = req.params;
    
    const proxyResult = await pool.query(`
      SELECT host, port, protocol, username, password
      FROM proxies
      WHERE id = $1
    `, [id]);
    
    if (proxyResult.rows.length === 0) {
      return res.status(404).json({ error: 'Proxy not found' });
    }
    
    const proxy = proxyResult.rows[0];
    const testResult = await testProxy(
      proxy.host,
      proxy.port,
      proxy.protocol,
      proxy.username,
      proxy.password
    );
    
    // Update proxy with test results
    await pool.query(`
      UPDATE proxies
      SET last_tested_at = CURRENT_TIMESTAMP,
          test_result = $1,
          response_time_ms = $2,
          is_anonymous = $3,
          active = $4
      WHERE id = $5
    `, [
      testResult.success ? 'success' : 'failed',
      testResult.responseTimeMs,
      testResult.isAnonymous,
      testResult.success,
      id
    ]);
    
    res.json({ test_result: testResult });
  } catch (error) {
    console.error('Error testing proxy:', error);
    res.status(500).json({ error: 'Failed to test proxy' });
  }
});

// Start proxy test job
// Query params: mode=all|failed|inactive, concurrency=10
router.post('/test-all', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const mode = (req.query.mode as ProxyTestMode) || 'all';
    const concurrency = parseInt(req.query.concurrency as string) || 10;

    // Validate mode
    if (!['all', 'failed', 'inactive'].includes(mode)) {
      return res.status(400).json({ error: 'Invalid mode. Use: all, failed, or inactive' });
    }

    // Validate concurrency (1-50)
    if (concurrency < 1 || concurrency > 50) {
      return res.status(400).json({ error: 'Concurrency must be between 1 and 50' });
    }

    const jobId = await createProxyTestJob(mode, concurrency);
    res.json({ jobId, mode, concurrency, message: `Proxy test job started (mode: ${mode}, concurrency: ${concurrency})` });
  } catch (error: any) {
    console.error('Error starting proxy test job:', error);
    res.status(500).json({ error: error.message || 'Failed to start proxy test job' });
  }
});

// Convenience endpoint: Test only failed proxies
router.post('/test-failed', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const concurrency = parseInt(req.query.concurrency as string) || 10;
    const jobId = await createProxyTestJob('failed', concurrency);
    res.json({ jobId, mode: 'failed', concurrency, message: 'Retesting failed proxies...' });
  } catch (error: any) {
    console.error('Error starting failed proxy test:', error);
    res.status(500).json({ error: error.message || 'Failed to start proxy test job' });
  }
});

// Cancel proxy test job
router.post('/test-job/:jobId/cancel', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { jobId } = req.params;
    const cancelled = await cancelProxyTestJob(parseInt(jobId));

    if (!cancelled) {
      return res.status(404).json({ error: 'Job not found or already completed' });
    }

    res.json({ message: 'Job cancelled successfully' });
  } catch (error) {
    console.error('Error cancelling job:', error);
    res.status(500).json({ error: 'Failed to cancel job' });
  }
});

// Update proxy
router.put('/:id', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { id } = req.params;
    const { host, port, protocol, username, password, active, max_connections } = req.body;

    const result = await pool.query(`
      UPDATE proxies
      SET host = COALESCE($1, host),
          port = COALESCE($2, port),
          protocol = COALESCE($3, protocol),
          username = COALESCE($4, username),
          password = COALESCE($5, password),
          active = COALESCE($6, active),
          max_connections = COALESCE($7, max_connections),
          updated_at = CURRENT_TIMESTAMP
      WHERE id = $8
      RETURNING *
    `, [host, port, protocol, username, password, active, max_connections, id]);
    
    if (result.rows.length === 0) {
      return res.status(404).json({ error: 'Proxy not found' });
    }
    
    res.json({ proxy: result.rows[0] });
  } catch (error) {
    console.error('Error updating proxy:', error);
    res.status(500).json({ error: 'Failed to update proxy' });
  }
});

// Delete proxy
router.delete('/:id', requireRole('superadmin'), async (req, res) => {
  try {
    const { id } = req.params;
    
    const result = await pool.query(`
      DELETE FROM proxies WHERE id = $1 RETURNING id
    `, [id]);
    
    if (result.rows.length === 0) {
      return res.status(404).json({ error: 'Proxy not found' });
    }
    
    res.json({ message: 'Proxy deleted successfully' });
  } catch (error) {
    console.error('Error deleting proxy:', error);
    res.status(500).json({ error: 'Failed to delete proxy' });
  }
});

// Update all proxy locations
router.post('/update-locations', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { updateAllProxyLocations } = await import('../services/geolocation');

    // Run in background
    updateAllProxyLocations().catch(err => {
      console.error('❌ Location update failed:', err);
    });

    res.json({ message: 'Location update job started' });
  } catch (error) {
    console.error('Error starting location update:', error);
    res.status(500).json({ error: 'Failed to start location update' });
  }
});

export default router;