const express = require('express');
const router = express.Router();
const { body, param, validationResult } = require('express-validator');
const representativesController = require('../controllers/representatives');
const emailsController = require('../controllers/emails');
const campaignsController = require('../controllers/campaigns');
const rateLimiter = require('../utils/rate-limiter');
const { requireAdmin } = require('../middleware/auth');

// Validation middleware
const handleValidationErrors = (req, res, next) => {
  const errors = validationResult(req);
  if (!errors.isEmpty()) {
    return res.status(400).json({ errors: errors.array() });
  }
  next();
};

// Test endpoints
router.get('/health', (req, res) => {
  res.json({ status: 'ok', timestamp: new Date().toISOString() });
});

router.get('/test-represent', representativesController.testConnection);

// Representatives endpoints
router.get(
  '/representatives/by-postal/:postalCode',
  param('postalCode').matches(/^[A-Za-z]\d[A-Za-z]\s?\d[A-Za-z]\d$/).withMessage('Invalid postal code format'),
  handleValidationErrors,
  rateLimiter.general,
  representativesController.getByPostalCode
);

router.post(
  '/representatives/refresh-postal/:postalCode',
  param('postalCode').matches(/^[A-Za-z]\d[A-Za-z]\s?\d[A-Za-z]\d$/).withMessage('Invalid postal code format'),
  handleValidationErrors,
  representativesController.refreshPostalCode
);

// Email endpoints
router.post(
  '/emails/send',
  rateLimiter.email,
  [
    body('recipientEmail').isEmail().withMessage('Valid email is required'),
    body('senderName').notEmpty().withMessage('Sender name is required'),
    body('senderEmail').isEmail().withMessage('Valid sender email is required'),
    body('subject').notEmpty().withMessage('Subject is required'),
    body('message').notEmpty().withMessage('Message is required'),
    body('postalCode').matches(/^[A-Za-z]\d[A-Za-z]\s?\d[A-Za-z]\d$/).withMessage('Invalid postal code format')
  ],
  handleValidationErrors,
  emailsController.sendEmail
);

// Campaign endpoints (Admin) - Protected
router.get('/admin/campaigns', requireAdmin, rateLimiter.general, campaignsController.getAllCampaigns);
router.get('/admin/campaigns/:id', requireAdmin, rateLimiter.general, campaignsController.getCampaignById);
router.post(
  '/admin/campaigns',
  requireAdmin,
  rateLimiter.general,
  [
    body('title').notEmpty().withMessage('Campaign title is required'),
    body('email_subject').notEmpty().withMessage('Email subject is required'),
    body('email_body').notEmpty().withMessage('Email body is required')
  ],
  handleValidationErrors,
  campaignsController.createCampaign
);
router.put('/admin/campaigns/:id', requireAdmin, rateLimiter.general, campaignsController.updateCampaign);
router.delete('/admin/campaigns/:id', requireAdmin, rateLimiter.general, campaignsController.deleteCampaign);
router.get('/admin/campaigns/:id/analytics', requireAdmin, rateLimiter.general, campaignsController.getCampaignAnalytics);

// Campaign endpoints (Public)
router.get('/campaigns/:slug', rateLimiter.general, campaignsController.getCampaignBySlug);
router.get('/campaigns/:slug/representatives/:postalCode', rateLimiter.representAPI, campaignsController.getRepresentativesForCampaign);
router.post(
  '/campaigns/:slug/track-user',
  rateLimiter.general,
  [
    body('postalCode').matches(/^[A-Za-z]\d[A-Za-z]\s?\d[A-Za-z]\d$/).withMessage('Invalid postal code format')
  ],
  handleValidationErrors,
  campaignsController.trackUserInfo
);
router.post(
  '/campaigns/:slug/send-email',
  rateLimiter.email,
  [
    body('recipientEmail').isEmail().withMessage('Valid recipient email is required'),
    body('postalCode').matches(/^[A-Za-z]\d[A-Za-z]\s?\d[A-Za-z]\d$/).withMessage('Invalid postal code format'),
    body('emailMethod').isIn(['smtp', 'mailto']).withMessage('Email method must be smtp or mailto')
  ],
  handleValidationErrors,
  campaignsController.sendCampaignEmail
);

module.exports = router;