/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

/* eslint-env mozilla/frame-script */

const { classes: Cc, interfaces: Ci, results: Cr, utils: Cu } = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");

let PaymentFrameScript = {
  init() {
    this.defineLazyLogGetter(this, "frameScript");

    addEventListener("DOMContentLoaded", this, {once: true});
    addEventListener("paymentContentToChrome", this, false, true);

    addMessageListener("paymentChromeToContent", this);
  },

  handleEvent(event) {
    switch (event.type) {
      case "DOMContentLoaded": {
        this.sendMessageToChrome("DOMContentLoaded");
        break;
      }
      case "paymentContentToChrome": {
        this.sendToChrome(event);
        break;
      }
      default: {
        throw new Error("Unexpected event type");
      }
    }
  },

  receiveMessage({data: {messageType, data}}) {
    switch (messageType) {
      case "showPaymentRequest": {
        this.sendToContent("showPaymentRequest", data);
        break;
      }
    }
  },

  sendToChrome({detail}) {
    let {messageType, requestId} = detail;
    this.log.debug(`received message from content: ${messageType} ... ${requestId}`);

    switch (messageType) {
      case "paymentCancel": {
        this.sendMessageToChrome("paymentCancel", {
          requestId,
        });
        break;
      }
    }
  },

  defineLazyLogGetter(scope, logPrefix) {
    XPCOMUtils.defineLazyGetter(scope, "log", () => {
      let {ConsoleAPI} = Cu.import("resource://gre/modules/Console.jsm", {});
      return new ConsoleAPI({
        maxLogLevelPref: "dom.payments.loglevel",
        prefix: logPrefix,
      });
    });
  },

  sendToContent(messageType, detail = {}) {
    this.log.debug(`sendToContent (${messageType})`);
    let response = Object.assign({messageType}, detail);
    let event = new content.document.defaultView.CustomEvent("paymentChromeToContent", {
      bubbles: true,
      detail: Cu.cloneInto(response, content.document.defaultView),
    });
    content.document.dispatchEvent(event);
  },

  sendMessageToChrome(messageType, detail = {}) {
    sendAsyncMessage("paymentContentToChrome", Object.assign(detail, {messageType}));
  },
};

PaymentFrameScript.init();