import { Router, Request, Response, NextFunction } from 'express';
import { UserRole } from '@prisma/client';
import { siteSettingsService } from './settings.service';
import { updateSiteSettingsSchema } from './settings.schemas';
import { validate } from '../../middleware/validate';
import { authenticate } from '../../middleware/auth.middleware';
import { requireRole } from '../../middleware/rbac.middleware';
import { emailService } from '../../services/email.service';

const router = Router();

// GET /api/settings — public (needed by login page + public pages), strips SMTP credentials
router.get(
  '/',
  async (_req: Request, res: Response, next: NextFunction) => {
    try {
      const settings = await siteSettingsService.getPublic();
      res.json(settings);
    } catch (err) {
      next(err);
    }
  }
);

// GET /api/settings/admin — SUPER_ADMIN only, returns full settings including SMTP
router.get(
  '/admin',
  authenticate,
  requireRole(UserRole.SUPER_ADMIN),
  async (_req: Request, res: Response, next: NextFunction) => {
    try {
      const settings = await siteSettingsService.get();
      res.json(settings);
    } catch (err) {
      next(err);
    }
  }
);

// POST /api/settings/email/test-connection — SUPER_ADMIN only
router.post(
  '/email/test-connection',
  authenticate,
  requireRole(UserRole.SUPER_ADMIN),
  async (_req: Request, res: Response, next: NextFunction) => {
    try {
      const success = await emailService.testConnection();
      res.json({ success, message: success ? 'SMTP connection verified' : 'SMTP connection failed' });
    } catch (err) {
      next(err);
    }
  }
);

// POST /api/settings/email/test-send — SUPER_ADMIN only
router.post(
  '/email/test-send',
  authenticate,
  requireRole(UserRole.SUPER_ADMIN),
  async (req: Request, res: Response, next: NextFunction) => {
    try {
      const { to } = req.body as { to?: string };
      const settings = await siteSettingsService.get();
      const recipient = to || settings.testEmailRecipient || 'admin@cmlite.org';

      const result = await emailService.sendEmail({
        to: recipient,
        subject: 'Changemaker Lite — Test Email',
        html: `<h2>SMTP Test Successful</h2><p>This email confirms that your SMTP configuration is working correctly.</p><p>Sent at: ${new Date().toISOString()}</p>`,
        text: `SMTP Test Successful\n\nThis email confirms that your SMTP configuration is working correctly.\n\nSent at: ${new Date().toISOString()}`,
      });

      res.json({
        success: result.success,
        messageId: result.messageId,
        testMode: result.testMode,
        recipient,
      });
    } catch (err) {
      next(err);
    }
  }
);

// PUT /api/settings — SUPER_ADMIN only
router.put(
  '/',
  authenticate,
  requireRole(UserRole.SUPER_ADMIN),
  validate(updateSiteSettingsSchema),
  async (req: Request, res: Response, next: NextFunction) => {
    try {
      const settings = await siteSettingsService.update(req.body);

      // If SMTP-related fields were updated, rebuild the transporter
      const smtpFields = ['smtpHost', 'smtpPort', 'smtpUser', 'smtpPass', 'smtpFromAddress', 'smtpActiveProvider', 'emailTestMode', 'testEmailRecipient'];
      const hasSmtpChanges = smtpFields.some((f) => f in req.body);
      if (hasSmtpChanges) {
        await emailService.rebuildTransporter();
      }

      res.json(settings);
    } catch (err) {
      next(err);
    }
  }
);

export { router as siteSettingsRouter };