const express = require('express');
const cookieParser = require('cookie-parser');
const path = require('path');
require('dotenv').config();
const { checkConnection } = require('./src/db');
const { initAuth } = require('./src/auth');
const q = require('./src/queries');

const app = express();
const PORT = process.env.PORT || 3000;

app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.urlencoded({ extended: true, limit: '32kb' }));
app.use(cookieParser());

const MOCK_USERS = [
  { id: 'admin', label: 'Администратор (WZ01112)', role: 'admin', clientId: 'WZ01112', companyId: 'aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee', companyName: 'Nubes Admin', email: 'admin@nubes.ru' },
  { id: 'test', label: 'Тест (WZ01325)', role: 'user', clientId: 'WZ01325', companyId: '3e64aac6-dcfc-4082-88dc-da19c86555a5', companyName: 'Тест', email: 'tazet@narod.ru' },
  { id: 'client2', label: 'Компания 2 (WZ02001)', role: 'user', clientId: 'WZ02001', companyId: '11111111-2222-3333-4444-555555555555', companyName: 'Вторая Компания', email: 'user2@example.com' },
];

async function start() {
  const auth = await initAuth();

  app.get('/healthz', (req, res) => res.send('OK'));

  if (auth.jwksHandler) app.get('/.well-known/jwks.json', auth.jwksHandler);

  app.get('/login', (req, res) => res.render('login', { users: MOCK_USERS, error: req.query.error || null }));

  app.post('/login', async (req, res) => {
    const user = MOCK_USERS.find(u => u.id === req.body.user);
    if (!user) return res.redirect('/login?error=' + encodeURIComponent('Пользователь не найден'));
    try {
      const token = await auth.issue({ clientId: user.clientId, companyId: user.companyId, companyName: user.companyName, email: user.email });
      res.cookie('jwt', token, { httpOnly: true, secure: process.env.NODE_ENV === 'production', sameSite: 'lax', maxAge: 24 * 60 * 60 * 1000 });
      res.redirect(req.query.returnTo || '/');
    } catch (e) { res.redirect('/login?error=' + encodeURIComponent('Ошибка выпуска токена')); }
  });

  app.get('/logout', (req, res) => { res.clearCookie('jwt'); res.redirect('/login'); });

  app.use(auth.middleware);

  app.get('/', async (req, res) => {
    const { clientId, companyName } = req.user;
    try {
      const company = await q.getOrCreateCompany(clientId, companyName);
      const limit = await q.getLimit(company);
      const entries = await q.listEntries(company.id);
      res.render('index', { entries, limit, used: entries.length, user: req.user, error: req.query.error || null, message: req.query.message || null, wasNormalized: req.query.wasNormalized === '1' });
    } catch (e) { res.render('index', { entries: [], limit: 15, used: 0, user: req.user, error: 'Ошибка загрузки', message: null, wasNormalized: false }); }
  });

  app.post('/add', async (req, res) => {
    const { value, comment } = req.body;
    const { clientId, companyName, email } = req.user;
    try {
      const company = await q.getOrCreateCompany(clientId, companyName);
      const result = await q.createEntry(company.id, value, comment, email);
      const message = result.wasNormalized ? `Адрес нормализован в ${result.entry.value_cidr}` : 'Добавлено';
      const wasNormalized = result.wasNormalized ? '1' : '0';
      res.redirect('/?message=' + encodeURIComponent(message) + '&wasNormalized=' + wasNormalized);
    } catch (e) { res.redirect('/?error=' + encodeURIComponent(e.message)); }
  });

  app.post('/delete/:id', async (req, res) => {
    const { clientId, companyName, email } = req.user;
    try {
      const company = await q.getOrCreateCompany(clientId, companyName);
      await q.deleteEntry(req.params.id, company.id, email);
      res.redirect('/');
    } catch (e) { res.redirect('/?error=' + encodeURIComponent(e.message)); }
  });

  app.get('/export', async (req, res) => {
    try {
      const { clientId, companyName } = req.user;
      const company = await q.getOrCreateCompany(clientId, companyName);
      const cidrs = await q.getExportCIDRs(company.id);
      res.setHeader('Content-Type', 'text/plain; charset=utf-8');
      res.send(cidrs.join('\n') + '\n');
    } catch (e) { res.status(500).send('Export error'); }
  });

  checkConnection().then(() => console.log('DB connected')).catch(e => console.error('DB not ready:', e.message));
  app.listen(PORT, () => console.log('Server on port ' + PORT));
}

start().catch(e => { console.error('Startup error:', e); process.exit(1); });