/* 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";

(function (exports) {

  var Cu = Components.utils;
  var Ci = Components.interfaces;
  var Cc = Components.classes;
  var CC = Components.Constructor;

  var { require } = Cu.import("resource://devtools/shared/Loader.jsm", {});
  var { NetUtil } = Cu.import("resource://gre/modules/NetUtil.jsm", {});
  var { fetch } = require("devtools/shared/DevToolsUtils");
  var promise = require("promise");

  var TEST_URL_ROOT = "http://example.com/browser/devtools/client/shared/test/";
  var ACTOR_URL = TEST_URL_ROOT + "test-actor.js";

// Register a test actor that can operate on the remote document
  exports.registerTestActor = Task.async(function* (client) {
  // First, instanciate ActorRegistryFront to be able to dynamically
  // register an actor
    let deferred = promise.defer();
    client.listTabs(deferred.resolve);
    let response = yield deferred.promise;
    let { ActorRegistryFront } = require("devtools/shared/fronts/actor-registry");
    let registryFront = ActorRegistryFront(client, response);

  // Then ask to register our test-actor to retrieve its front
    let options = {
      type: { tab: true },
      constructor: "TestActor",
      prefix: "testActor"
    };
    let testActorFront = yield registryFront.registerActor(ACTOR_URL, options);
    return testActorFront;
  });

// Load the test actor in a custom sandbox
// as we can't use SDK module loader with URIs
  var loadFront = Task.async(function* () {
    let sourceText = yield request(ACTOR_URL);
    const principal = CC("@mozilla.org/systemprincipal;1", "nsIPrincipal")();
    const sandbox = Cu.Sandbox(principal);
    const exports = sandbox.exports = {};
    sandbox.require = require;
    Cu.evalInSandbox(sourceText, sandbox, "1.8", ACTOR_URL, 1);
    return sandbox.exports;
  });

// Ensure fetching a live TabActor form for the targeted app
// (helps fetching the test actor registered dynamically)
  var getUpdatedForm = function (client, tab) {
    return client.getTab({tab: tab})
               .then(response => response.tab);
  };

// Spawn an instance of the test actor for the given toolbox
  exports.getTestActor = Task.async(function* (toolbox) {
    let client = toolbox.target.client;
    return getTestActor(client, toolbox.target.tab, toolbox);
  });


// Sometimes, we need the test actor before opening or without a toolbox
// then just create a front for the given `tab`
  exports.getTestActorWithoutToolbox = Task.async(function* (tab) {
    let { DebuggerServer } = require("devtools/server/main");
    let { DebuggerClient } = require("devtools/shared/client/main");

  // We need to spawn a client instance,
  // but for that we have to first ensure a server is running
    if (!DebuggerServer.initialized) {
      DebuggerServer.init();
      DebuggerServer.addBrowserActors();
    }
    let client = new DebuggerClient(DebuggerServer.connectPipe());

    yield client.connect();

  // We also need to make sure the test actor is registered on the server.
    yield registerTestActor(client);

    return getTestActor(client, tab);
  });

// Fetch the content of a URI
  var request = function (uri) {
    return fetch(uri).then(({ content }) => content);
  };

  var getTestActor = Task.async(function* (client, tab, toolbox) {
  // We may have to update the form in order to get the dynamically registered
  // test actor.
    let form = yield getUpdatedForm(client, tab);

    let { TestActorFront } = yield loadFront();

    return new TestActorFront(client, form, toolbox);
  });

})(this);
