'use strict';

/*
  Transpiled to es2015 using https://babeljs.io/repl syntax since some of our targets doesn't support es2016
*/

// Object which keeps yet-unfulfilled Promises, used by PythonHandler HOC

window.PROMISE_STORE = {};

// TODO: Leaving the following code in for now but remember to remove all of this once the transition to PythonHandler is completed.

// It's 4096 for cefpython3.
// WebKit in macOS 10.13 started to limit it to just 1000.
// There should be some reserved for overhead.

var MAX_MESSAGE_SIZE = 900;

var encodeArgs = function encodeArgs(args) {
  // Encode args to transfer it reliably to the Python side, where the
  // transfer is done in parts and not in one go. We encode to UTF-8
  // so that we know exactly the number of bytes needed. If it's just
  // plain string that contains unicode characters, we might be
  // splitting it at 4000-character blocks, but not 4000-byte blocks
  // (it's more than 4000 bytes). Then, just to ensure that setting of
  // the title to a possibly "invalid" string (because it's basically
  // a binary blob now) won't have issues, we encode it further to
  // base64.
  // See for implementation details:
  // https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/btoa
  return btoa(unescape(encodeURIComponent(JSON.stringify(args))));
};

var genCallId = function genCallId() {
  return Math.random()
    .toString(36)
    .substr(2);
};

function callPy() {
  var args = [];

  for (var i = 0; i < arguments.length; i++) {
    args.push(arguments[i]);
  }

  var methodName = args[0]; // TODO: Properly implement dragging. For now, just temporarily enable this legacy
  // method again for these specific methods.

  if (methodName !== 'js_start_drag' && methodName !== 'js_stop_drag') {
    return;
  } // We split up the encoded args into multiple messages. We have a
  // callId in case calls are interspersed (not sure if this is
  // possible).

  var command = encodeArgs(args);
  var callId = genCallId();
  var numParts = Math.ceil(command.length / MAX_MESSAGE_SIZE);

  for (var i = 0; i < numParts; i++) {
    var message = 'py::'
      .concat(callId, ':')
      .concat(numParts, ':')
      .concat(i, ':');
    message += command.substr(i * MAX_MESSAGE_SIZE, MAX_MESSAGE_SIZE);
    document.title = message;
  } // To ensure that title change event is called because it's possible
  // to have consecutive calls that have the same arguments and thus,
  // the same message.

  document.title = '-'; // TODO: Enable this when in debug mode.
  // console.log(command)
}

window.onerror = function() {
  callPy('js_error', arguments);
};