import { Router } from 'express';
import { authMiddleware, requireRole } from '../auth/middleware';
import { pool } from '../db/pool';
import crypto from 'crypto';

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

// Generate secure random API key (64-character hex)
function generateApiKey(): string {
  return crypto.randomBytes(32).toString('hex');
}

// Get all API permissions
router.get('/', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const result = await pool.query(`
      SELECT *
      FROM wp_dutchie_api_permissions
      ORDER BY created_at DESC
    `);

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

// Get all dispensaries for dropdown (must be before /:id to avoid route conflict)
router.get('/dispensaries', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const result = await pool.query(`
      SELECT id, name
      FROM dispensaries
      ORDER BY name
    `);
    res.json({ dispensaries: result.rows });
  } catch (error) {
    console.error('Error fetching dispensaries:', error);
    res.status(500).json({ error: 'Failed to fetch dispensaries' });
  }
});

// Get single API permission
router.get('/:id', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { id } = req.params;

    const result = await pool.query(`
      SELECT *
      FROM wp_dutchie_api_permissions
      WHERE id = $1
    `, [id]);

    if (result.rows.length === 0) {
      return res.status(404).json({ error: 'Permission not found' });
    }

    res.json({ permission: result.rows[0] });
  } catch (error) {
    console.error('Error fetching API permission:', error);
    res.status(500).json({ error: 'Failed to fetch API permission' });
  }
});

// Create new API permission
router.post('/', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    // Support both store_id (existing) and dispensary_id (for compatibility)
    const { user_name, allowed_ips, allowed_domains, store_id, dispensary_id } = req.body;
    const storeIdToUse = store_id || dispensary_id;

    if (!user_name) {
      return res.status(400).json({ error: 'User name is required' });
    }

    if (!storeIdToUse) {
      return res.status(400).json({ error: 'Store/Dispensary is required' });
    }

    // Get dispensary name for display
    const dispensaryResult = await pool.query('SELECT name FROM dispensaries WHERE id = $1', [storeIdToUse]);
    if (dispensaryResult.rows.length === 0) {
      return res.status(400).json({ error: 'Invalid store/dispensary ID' });
    }
    const storeName = dispensaryResult.rows[0].name;

    const apiKey = generateApiKey();

    const result = await pool.query(`
      INSERT INTO wp_dutchie_api_permissions (
        user_name,
        api_key,
        allowed_ips,
        allowed_domains,
        is_active,
        store_id,
        store_name
      )
      VALUES ($1, $2, $3, $4, 1, $5, $6)
      RETURNING *
    `, [
      user_name,
      apiKey,
      allowed_ips || null,
      allowed_domains || null,
      storeIdToUse,
      storeName
    ]);

    res.status(201).json({
      permission: result.rows[0],
      message: 'API permission created successfully. Save the API key securely - it cannot be retrieved later.'
    });
  } catch (error) {
    console.error('Error creating API permission:', error);
    res.status(500).json({ error: 'Failed to create API permission' });
  }
});

// Update API permission
router.put('/:id', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { id } = req.params;
    const { user_name, allowed_ips, allowed_domains, is_active } = req.body;

    const result = await pool.query(`
      UPDATE wp_dutchie_api_permissions
      SET
        user_name = COALESCE($1, user_name),
        allowed_ips = COALESCE($2, allowed_ips),
        allowed_domains = COALESCE($3, allowed_domains),
        is_active = COALESCE($4, is_active)
      WHERE id = $5
      RETURNING *
    `, [user_name, allowed_ips, allowed_domains, is_active, id]);

    if (result.rows.length === 0) {
      return res.status(404).json({ error: 'Permission not found' });
    }

    res.json({ permission: result.rows[0] });
  } catch (error) {
    console.error('Error updating API permission:', error);
    res.status(500).json({ error: 'Failed to update API permission' });
  }
});

// Toggle permission active status
router.patch('/:id/toggle', requireRole('superadmin', 'admin'), async (req, res) => {
  try {
    const { id } = req.params;

    const result = await pool.query(`
      UPDATE wp_dutchie_api_permissions
      SET is_active = CASE WHEN is_active = 1 THEN 0 ELSE 1 END
      WHERE id = $1
      RETURNING *
    `, [id]);

    if (result.rows.length === 0) {
      return res.status(404).json({ error: 'Permission not found' });
    }

    res.json({ permission: result.rows[0] });
  } catch (error) {
    console.error('Error toggling API permission:', error);
    res.status(500).json({ error: 'Failed to toggle API permission' });
  }
});

// Delete API permission
router.delete('/:id', requireRole('superadmin'), async (req, res) => {
  try {
    const { id } = req.params;

    const result = await pool.query('DELETE FROM wp_dutchie_api_permissions WHERE id = $1 RETURNING *', [id]);

    if (result.rows.length === 0) {
      return res.status(404).json({ error: 'Permission not found' });
    }

    res.json({ message: 'API permission deleted successfully' });
  } catch (error) {
    console.error('Error deleting API permission:', error);
    res.status(500).json({ error: 'Failed to delete API permission' });
  }
});

export default router;