(function () {
  'use strict';

  /*
  Depends on Firefox add-on and executables from https://github.com/brettz9/webappfind

  Todos:
  1. See WebAppFind Readme for SVG-related todos
  */
  (function () {
    var saveMessage = 'webapp-save',
        readMessage = 'webapp-read',
        excludedMessages = [readMessage, saveMessage];
    var pathID = void 0;

    // Todo: Update to new API once released
    window.addEventListener('message', function (e) {
      if (e.origin !== window.location.origin || // PRIVACY AND SECURITY! (for viewing and saving, respectively)
      !Array.isArray(e.data) || excludedMessages.includes(e.data[0]) // Validate format and avoid our post below
      ) {
          return;
        }
      var messageType = e.data[0];
      var svgString = void 0;
      switch (messageType) {
        case 'webapp-view':
          // Populate the contents
          pathID = e.data[1];

          svgString = e.data[2];
          svgEditor.loadFromString(svgString);

          /* if ($('#tool_save_file')) {
            $('#tool_save_file').disabled = false;
          } */
          break;
        case 'webapp-save-end':
          alert('save complete for pathID ' + e.data[1] + '!');
          break;
        default:
          throw new Error('Unexpected mode');
      }
    }, false);

    window.postMessage([readMessage], window.location.origin !== 'null' ? window.location.origin : '*'); // Avoid "null" string error for file: protocol (even though file protocol not currently supported by add-on)

    svgEditor.addExtension('WebAppFind', function () {
      return {
        name: 'WebAppFind',
        svgicons: svgEditor.curConfig.extIconsPath + 'webappfind-icon.svg',
        buttons: [{
          id: 'webappfind_save', //
          type: 'app_menu',
          title: 'Save Image back to Disk',
          position: 4, // Before 0-based index position 4 (after the regular "Save Image (S)")
          events: {
            click: function click() {
              if (!pathID) {
                // Not ready yet as haven't received first payload
                return;
              }
              window.postMessage([saveMessage, pathID, svgEditor.canvas.getSvgString()], window.location.origin);
            }
          }
        }]
      };
    });
  })();

}());