import { Router } from "express";
import crypto from 'crypto';
import { storage } from "../storage";
import { authenticateToken, requirePermission, type AuthenticatedRequest } from "../middleware/auth.middleware";
import { tenantIsolation } from "../middleware/tenant.middleware";
import { validateRequest } from "../middleware/validation.middleware";
import { createInvitationSchema } from "@shared/schema";
import { emailService } from "../services/email.service";

export function registerInvitationRoutes(router: Router): void {
  // Get invitation info by token (public - no auth required)
  router.get('/api/invitations/:token', async (req, res) => {
    try {
      const { token } = req.params;
      const invitation = await storage.getInvitationByToken(token);

      if (!invitation) {
        return res.status(404).json({ success: false, error: 'Приглашение не найдено' });
      }

      if (invitation.usedAt) {
        return res.status(400).json({ success: false, error: 'Приглашение уже использовано' });
      }

      if (new Date(invitation.expiresAt) < new Date()) {
        return res.status(400).json({ success: false, error: 'Срок действия приглашения истёк' });
      }

      const organization = await storage.getOrganization(invitation.organizationId);

      res.json({
        success: true,
        invitation: {
          email: invitation.email,
          organizationName: organization?.displayName || organization?.name,
        }
      });
    } catch (error) {
      console.error('Get invitation error:', error);
      res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
    }
  });

  // Create invitation (admin only)
  router.post('/api/invitations',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    validateRequest(createInvitationSchema),
    async (req: AuthenticatedRequest, res) => {
      try {
        const { email } = req.body;

        const existingUser = await storage.getUserByEmail(email, req.organizationId!);
        if (existingUser) {
          return res.status(400).json({
            success: false,
            error: 'Пользователь с таким email уже существует в организации'
          });
        }

        const existingInvitations = await storage.getInvitationsByOrganization(req.organizationId!);
        const existingInvitation = existingInvitations.find(
          inv => inv.email === email && !inv.usedAt && new Date(inv.expiresAt) > new Date()
        );
        if (existingInvitation) {
          return res.status(400).json({ success: false, error: 'Приглашение для этого email уже существует' });
        }

        const token = crypto.randomBytes(32).toString('hex');
        const expiresAt = new Date();
        expiresAt.setDate(expiresAt.getDate() + 7);

        const invitation = await storage.createInvitation({
          organizationId: req.organizationId!,
          email,
          token,
          createdBy: req.user!.id,
          expiresAt,
        });

        const organization = await storage.getOrganization(req.organizationId!);
        const inviter = await storage.getUser(req.user!.id);

        const baseUrl = process.env.BASE_URL || 'https://iistwin.ru';
        const inviteLink = `${baseUrl}/invite/${token}`;

        const inviterName = inviter ? `${inviter.firstName} ${inviter.middleName || ''} ${inviter.lastName}`.trim() : 'Администратор';
        await emailService.sendInvitationLinkEmail(
          email,
          inviterName,
          organization?.displayName || organization?.name || 'Организация',
          inviteLink
        );

        res.status(201).json({
          success: true,
          invitation: {
            id: invitation.id,
            email: invitation.email,
            token: invitation.token,
            expiresAt: invitation.expiresAt,
            inviteLink
          }
        });
      } catch (error) {
        console.error('Create invitation error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  // Get all invitations for organization (admin only)
  router.get('/api/invitations',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const invitationsData = await storage.getInvitationsByOrganization(req.organizationId!);
        const baseUrl = process.env.BASE_URL || 'https://iistwin.ru';
        const invitations = invitationsData.map(inv => ({
          id: inv.id,
          email: inv.email,
          token: inv.token,
          createdAt: inv.createdAt,
          expiresAt: inv.expiresAt,
          usedAt: inv.usedAt,
          inviteLink: `${baseUrl}/invite/${inv.token}`,
          isExpired: new Date(inv.expiresAt) < new Date(),
          isUsed: !!inv.usedAt
        }));
        res.json({ success: true, invitations });
      } catch (error) {
        console.error('Get invitations error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  // Delete invitation (admin only)
  router.delete('/api/invitations/:id',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const id = parseInt(req.params.id);
        await storage.deleteInvitation(id, req.organizationId!);
        res.json({ success: true, message: 'Приглашение удалено' });
      } catch (error) {
        console.error('Delete invitation error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );
}