/**

 * Copyright (c) Meta Platforms, Inc. and affiliates.

 *

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

 *

 * @noflow

 */

import * as React from 'react';

import {createRoot} from 'react-dom/client';

import {

  activate as activateBackend,

  createBridge as createBackendBridge,

  initialize as initializeBackend,

} from 'react-devtools-inline/backend';

import {

  createBridge as createFrontendBridge,

  createStore,

  initialize as createDevTools,

} from 'react-devtools-inline/frontend';

import {__DEBUG__} from 'react-devtools-shared/src/constants';

function inject(contentDocument, sourcePath, callback) {

  const script = contentDocument.createElement('script');

  script.onload = callback;

  script.src = sourcePath;

  ((contentDocument.body: any): HTMLBodyElement).appendChild(script);

}

function init(appIframe, devtoolsContainer, appSource) {

  const {contentDocument, contentWindow} = appIframe;

  // Wire each DevTools instance directly to its app.

  // By default, DevTools dispatches "message" events on the window,

  // but this means that only one instance of DevTools can live on a page.

  const wall = {

    _listeners: [],

    listen(listener) {

      if (__DEBUG__) {

        console.log('[Shell] Wall.listen()');

      }

      wall._listeners.push(listener);

    },

    send(event, payload) {

      if (__DEBUG__) {

        console.log('[Shell] Wall.send()', {event, payload});

      }

      wall._listeners.forEach(listener => listener({event, payload}));

    },

  };

  const backendBridge = createBackendBridge(contentWindow, wall);

  initializeBackend(contentWindow);

  const frontendBridge = createFrontendBridge(contentWindow, wall);

  const store = createStore(frontendBridge);

  const DevTools = createDevTools(contentWindow, {

    bridge: frontendBridge,

    store,

  });

  inject(contentDocument, appSource, () => {

    createRoot(devtoolsContainer).render(<DevTools />);

  });

  activateBackend(contentWindow, {bridge: backendBridge});

}

const appIframeLeft = document.getElementById('iframe-left');

const appIframeRight = document.getElementById('iframe-right');

const devtoolsContainerLeft = document.getElementById('devtools-left');

const devtoolsContainerRight = document.getElementById('devtools-right');

init(appIframeLeft, devtoolsContainerLeft, 'dist/multi-left.js');

init(appIframeRight, devtoolsContainerRight, 'dist/multi-right.js');