"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var message_channel_exports = {};
__export(message_channel_exports, {
  MessageChannel: () => MessageChannel
});
module.exports = __toCommonJS(message_channel_exports);
class MessageChannel {
  appOrigin;
  channel = null;
  bufferedMessages = [];
  constructor({ appOrigin }) {
    this.appOrigin = appOrigin;
  }
  postMessage(message, transferables) {
    if (this.channel) {
      this.channel.postMessage(message, transferables ?? []);
    } else {
      this.bufferedMessages.push([message, transferables]);
    }
  }
  setup(onMessage) {
    const channel = new window.MessageChannel();
    channel.port1.onmessage = onMessage;
    window.parent.postMessage(channel.port2, this.appOrigin, [channel.port2]);
    this.channel = channel.port1;
  }
  dispatchBuffered() {
    console.assert(this.channel != null, "channel is not setup");
    this.bufferedMessages.forEach(([message, transferables]) => {
      this.channel?.postMessage(message, transferables ?? []);
    });
    this.bufferedMessages = [];
  }
  teardown() {
    if (this.channel) {
      this.channel.onmessage = null;
      this.channel.close();
    }
  }
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  MessageChannel
});
//# sourceMappingURL=message-channel.js.map