(() => {
  /*
    chrome.storage.local.set({
      credentials: {
        'example.com': {
          username: 'foo',
          password: '***'
        }
      }
    });
  */

  chrome.storage.local.get(['credentials'], ({ credentials = {} }) => {
    const REQS = new Set();

    setInterval(() => {
      REQS.clear();
    }, 60000);

    let onAuthRequired = ({ challenger, requestId }) => {
      let hostKey = Object.keys(credentials).find(hostKey => {
        return (
          challenger.host === hostKey ||
          challenger.host.endsWith(`.${hostKey}`)
        );
      });

      if (!hostKey) {
        return;
      }

      if (REQS.has(requestId)) {
        return {
          cancel: true
        };
      };

      REQS.add(requestId);

      return {
        authCredentials: credentials[hostKey]
      };
    };

    chrome.webRequest.onAuthRequired.addListener(onAuthRequired, {
      urls: ['https://*/*']
    }, ['blocking']);
  });

})();