import { parseCookies } from '../auth.mjs';

function wikiCookie(wikiAuth, token, secure) {
  const parts = [
    `${wikiAuth.COOKIE_NAME}=${encodeURIComponent(token)}`,
    'Path=/',
    'HttpOnly',
    'SameSite=Lax',
    'Max-Age=604800',
  ];
  if (secure) parts.push('Secure');
  return parts.join('; ');
}

function clearWikiCookie(wikiAuth, secure) {
  const parts = [
    `${wikiAuth.COOKIE_NAME}=`,
    'Path=/',
    'HttpOnly',
    'SameSite=Lax',
    'Max-Age=0',
  ];
  if (secure) parts.push('Secure');
  return parts.join('; ');
}

export function attachPortalWikiRoutes({
  router,
  jsonBody,
  wikiAuth,
  isSecureRequest,
  parseCookiesFn = parseCookies,
} = {}) {
  if (
    !router ||
    typeof jsonBody !== 'function' ||
    !wikiAuth ||
    typeof isSecureRequest !== 'function' ||
    typeof parseCookiesFn !== 'function'
  ) {
    throw new Error(
      'attachPortalWikiRoutes requires route dependencies',
    );
  }

  router.use(jsonBody);

  router.post('/auth/register', (req, res) => {
    const {
      username,
      password,
      displayName,
    } = req.body || {};
    if (!username || !password) {
      return res.status(400).json({
        message: '用户名和密码不能为空',
      });
    }
    const result = wikiAuth.register(
      username,
      password,
      displayName,
    );
    if (!result.ok) {
      return res.status(409).json({
        message: result.message,
      });
    }
    return res.json({
      ok: true,
      user: result.user,
    });
  });

  router.post('/auth/login', (req, res) => {
    const { username, password } = req.body || {};
    if (!username || !password) {
      return res.status(400).json({
        message: '用户名和密码不能为空',
      });
    }
    const result = wikiAuth.login(
      username,
      password,
    );
    if (!result.ok) {
      return res.status(401).json({
        message: result.message,
      });
    }
    const secure = isSecureRequest(req);
    res.set(
      'Set-Cookie',
      wikiCookie(wikiAuth, result.token, secure),
    );
    return res.json({
      ok: true,
      user: result.user,
    });
  });

  router.post('/auth/logout', (req, res) => {
    const cookies = parseCookiesFn(
      req.get('cookie'),
    );
    wikiAuth.revoke(
      cookies[wikiAuth.COOKIE_NAME],
    );
    res.set(
      'Set-Cookie',
      clearWikiCookie(
        wikiAuth,
        isSecureRequest(req),
      ),
    );
    return res.json({ ok: true });
  });

  router.get('/auth/me', (req, res) => {
    const cookies = parseCookiesFn(
      req.get('cookie'),
    );
    const session = wikiAuth.verify(
      cookies[wikiAuth.COOKIE_NAME],
    );
    if (!session) {
      return res.json({
        authenticated: false,
        user: null,
      });
    }
    const user = wikiAuth.getUser(
      session.username,
    );
    return res.json({
      authenticated: true,
      user,
    });
  });

  function requireWikiAuth(req, res, next) {
    const cookies = parseCookiesFn(
      req.get('cookie'),
    );
    const session = wikiAuth.verify(
      cookies[wikiAuth.COOKIE_NAME],
    );
    if (!session) {
      return res.status(401).json({
        message: '未登录',
      });
    }
    req.wikiUser = session;
    next();
  }

  router.get(
    '/pages',
    requireWikiAuth,
    (req, res) => {
      const { q } = req.query;
      if (q) {
        return res.json(
          wikiAuth.searchPages(
            req.wikiUser.username,
            q,
          ),
        );
      }
      res.json(
        wikiAuth.listPages(
          req.wikiUser.username,
        ),
      );
    },
  );

  router.get(
    '/pages/:slug',
    requireWikiAuth,
    (req, res) => {
      const page = wikiAuth.getPage(
        req.wikiUser.username,
        req.params.slug,
      );
      if (!page) {
        return res.status(404).json({
          message: '页面不存在',
        });
      }
      res.json(page);
    },
  );

  router.post(
    '/pages/:slug',
    requireWikiAuth,
    (req, res) => {
      const { title, content, tags } =
        req.body || {};
      const page = wikiAuth.savePage(
        req.wikiUser.username,
        req.params.slug,
        title,
        content,
        tags,
      );
      res.json(page);
    },
  );

  router.delete(
    '/pages/:slug',
    requireWikiAuth,
    (req, res) => {
      wikiAuth.deletePage(
        req.wikiUser.username,
        req.params.slug,
      );
      res.json({ ok: true });
    },
  );
}