import { generateRandomOAuthAntiCSRFToken } from './OAuthAntiCSRFTokenHelper';
import storage from '../state/storage';

const Type = {
  CALENDAR: 'calendar',
  ADDRESS_BOOK: 'contacts',
};
const generateRandomStr = () => {
  const length = 32;
  let text = '';
  const possibilities = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  for (let i = 0; i < length; i++) {
    text += possibilities.charAt(Math.floor(Math.random() * possibilities.length));
  }
  return text;
};

const generateUrl = (type, provider, token, redirectUri, clientId, branch) => {
  const clientBaseUrl =
    provider === 'google'
      ? 'https://accounts.google.com/o/oauth2/auth'
      : 'https://login.microsoftonline.com/common/oauth2/v2.0/authorize';
  const scope = type === 'calendar' ? 'CALENDARS' : 'CONTACTS';
  if (provider === 'google') {
    const scopeUrl =
      type === 'calendar' ? 'https://www.googleapis.com/auth/calendar' : 'https://www.google.com/m8/feeds/';
    const state = encodeURIComponent(
      JSON.stringify({
        doodleScope: [scope],
        callbackUrl: redirectUri,
        branch,
        oauth_anti_csrf_token_cookie: token,
      })
    );
    return `${clientBaseUrl}?access_type=offline&approval_prompt=force&client_id=${clientId}.apps.googleusercontent.com&redirect_uri=${redirectUri}&response_type=code&scope=${scopeUrl}&state=${state}`;
  }
  if (provider === 'outlookcom') {
    const nonce = generateRandomStr();
    const state = encodeURIComponent(JSON.stringify({ type: scope, branch, oauth_anti_csrf_token_cookie: token }));
    return `${clientBaseUrl}?client_id=${clientId}&response_type=id_token+code&response_mode=form_post&scope=openid+offline_access+User.Read+Calendars.ReadWrite+Contacts.Read&nonce=${nonce}&redirect_uri=${encodeURIComponent(
      redirectUri
    )}&state=${state}`;
  }
};

const open = (provider, type, url) => {
  const width = 700;
  const height = 400;
  const left = screen.width / 2 - width / 2;
  const top = screen.height / 2 - height / 2;
  const windowName = `connect-${provider}-${type}`;
  return window.open(
    url,
    windowName,
    `toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=${width}, height=${height}, top=${top}, left=${left}`
  );
};

const checkIfWindowClosed = win =>
  new Promise((resolve, reject) => {
    const closingTimerId = setTimeout(reject, 180000);
    const timer = setInterval(() => {
      if (win.closed) {
        window.clearInterval(timer);
        window.clearInterval(closingTimerId);
        resolve();
      }
    }, 100);
  });

const checkIfConnectedSuccessfully = (provider, oldCalendarsList, newCalendarsList) => {
  const addedCalendar = newCalendarsList.filter(calendar => !oldCalendarsList.some(cal => calendar.id === cal.id));
  return addedCalendar.length > 0;
};

const generateUrlData = (provider, options) => {
  const CSRFTokenFromCookie = storage.getCookie('oauth_anti_csrf_token_cookie');
  const data = {
    randomCSRFToken: CSRFTokenFromCookie || generateRandomOAuthAntiCSRFToken(),
    clientId: provider === 'google' ? options.googleClientId : options.outlookClientId,
    redirectUri: provider === 'google' ? options.googleCalendarRedirectUri : options.outlookRedirectUri,
    branch: options.oAuthProxyTarget,
  };
  if (!CSRFTokenFromCookie) {
    storage.setOAuthAntiCSRFTokenCookie(data.randomCSRFToken, options.cookieDomain);
  }
  return data;
};

export { generateUrl, open, checkIfConnectedSuccessfully, generateUrlData, checkIfWindowClosed, Type };