/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/ */
/* jshint esnext:true, globalstrict:true, moz:true, undef:true, unused:true */
/* globals Components,Assert,run_next_test,add_test,do_execute_soon */

"use strict";

/* globals ControllerStateMachine */
const {ControllerStateMachine} = ChromeUtils.import("resource://gre/modules/presentation/ControllerStateMachine.jsm");
/* globals ReceiverStateMachine */
const {ReceiverStateMachine} = ChromeUtils.import("resource://gre/modules/presentation/ReceiverStateMachine.jsm");
/* globals State */
const {State} = ChromeUtils.import("resource://gre/modules/presentation/StateMachineHelper.jsm");

const testControllerId = "test-controller-id";
const testPresentationId = "test-presentation-id";
const testUrl = "http://example.org";

let mockControllerChannel = {};
let mockReceiverChannel = {};

let controllerState = new ControllerStateMachine(mockControllerChannel, testControllerId);
let receiverState = new ReceiverStateMachine(mockReceiverChannel);

mockControllerChannel.sendCommand = function(command) {
  executeSoon(function() {
    receiverState.onCommand(command);
  });
};

mockReceiverChannel.sendCommand = function(command) {
  executeSoon(function() {
    controllerState.onCommand(command);
  });
};

function connect() {
  Assert.equal(controllerState.state, State.INIT, "controller in init state");
  Assert.equal(receiverState.state, State.INIT, "receiver in init state");
  // step 1: underlying connection is ready
  controllerState.onChannelReady();
  Assert.equal(controllerState.state, State.CONNECTING, "controller in connecting state");
  receiverState.onChannelReady();
  Assert.equal(receiverState.state, State.CONNECTING, "receiver in connecting state");

  // step 2: receiver reply to connect command
  mockReceiverChannel.notifyDeviceConnected = function(deviceId) {
    Assert.equal(deviceId, testControllerId, "receiver connect to mock controller");
    Assert.equal(receiverState.state, State.CONNECTED, "receiver in connected state");

    // step 3: controller receive connect-ack command
    mockControllerChannel.notifyDeviceConnected = function() {
      Assert.equal(controllerState.state, State.CONNECTED, "controller in connected state");
      run_next_test();
    };
  };
}

function launch() {
  Assert.equal(controllerState.state, State.CONNECTED, "controller in connected state");
  Assert.equal(receiverState.state, State.CONNECTED, "receiver in connected state");

  controllerState.launch(testPresentationId, testUrl);
  mockReceiverChannel.notifyLaunch = function(presentationId, url) {
    Assert.equal(receiverState.state, State.CONNECTED, "receiver in connected state");
    Assert.equal(presentationId, testPresentationId, "expected presentationId received");
    Assert.equal(url, testUrl, "expected url received");

    mockControllerChannel.notifyLaunch = function(presId) {
      Assert.equal(controllerState.state, State.CONNECTED, "controller in connected state");
      Assert.equal(presId, testPresentationId, "expected presentationId received from ack");

      run_next_test();
    };
  };
}

function terminateByController() {
  Assert.equal(controllerState.state, State.CONNECTED, "controller in connected state");
  Assert.equal(receiverState.state, State.CONNECTED, "receiver in connected state");

  controllerState.terminate(testPresentationId);
  mockReceiverChannel.notifyTerminate = function(presentationId) {
    Assert.equal(receiverState.state, State.CONNECTED, "receiver in connected state");
    Assert.equal(presentationId, testPresentationId, "expected presentationId received");

    mockControllerChannel.notifyTerminate = function(presId) {
      Assert.equal(controllerState.state, State.CONNECTED, "controller in connected state");
      Assert.equal(presId, testPresentationId, "expected presentationId received from ack");

      run_next_test();
    };

    receiverState.terminateAck(presentationId);
  };
}

function terminateByReceiver() {
  Assert.equal(controllerState.state, State.CONNECTED, "controller in connected state");
  Assert.equal(receiverState.state, State.CONNECTED, "receiver in connected state");

  receiverState.terminate(testPresentationId);
  mockControllerChannel.notifyTerminate = function(presentationId) {
    Assert.equal(controllerState.state, State.CONNECTED, "controller in connected state");
    Assert.equal(presentationId, testPresentationId, "expected presentationId received");

    mockReceiverChannel.notifyTerminate = function(presId) {
      Assert.equal(receiverState.state, State.CONNECTED, "receiver in connected state");
      Assert.equal(presId, testPresentationId, "expected presentationId received from ack");
      run_next_test();
    };

    controllerState.terminateAck(presentationId);
  };
}

function exchangeSDP() {
  Assert.equal(controllerState.state, State.CONNECTED, "controller in connected state");
  Assert.equal(receiverState.state, State.CONNECTED, "receiver in connected state");

  const testOffer = "test-offer";
  const testAnswer = "test-answer";
  const testIceCandidate = "test-ice-candidate";
  controllerState.sendOffer(testOffer);
  mockReceiverChannel.notifyOffer = function(offer) {
    Assert.equal(offer, testOffer, "expected offer received");

    receiverState.sendAnswer(testAnswer);
    mockControllerChannel.notifyAnswer = function(answer) {
      Assert.equal(answer, testAnswer, "expected answer received");

      controllerState.updateIceCandidate(testIceCandidate);
      mockReceiverChannel.notifyIceCandidate = function(candidate) {
        Assert.equal(candidate, testIceCandidate, "expected ice candidate received in receiver");

        receiverState.updateIceCandidate(testIceCandidate);
        mockControllerChannel.notifyIceCandidate = function(controllerCandidate) {
          Assert.equal(controllerCandidate, testIceCandidate, "expected ice candidate received in controller");

          run_next_test();
        };
      };
    };
  };
}

function disconnect() {
  // step 1: controller send disconnect command
  controllerState.onChannelClosed(Cr.NS_OK, false);
  Assert.equal(controllerState.state, State.CLOSING, "controller in closing state");

  mockReceiverChannel.notifyDisconnected = function(reason) {
    Assert.equal(reason, Cr.NS_OK, "receive close reason");
    Assert.equal(receiverState.state, State.CLOSED, "receiver in closed state");

    receiverState.onChannelClosed(Cr.NS_OK, true);
    Assert.equal(receiverState.state, State.CLOSED, "receiver in closed state");

    mockControllerChannel.notifyDisconnected = function(disconnectReason) {
      Assert.equal(disconnectReason, Cr.NS_OK, "receive close reason");
      Assert.equal(controllerState.state, State.CLOSED, "controller in closed state");

      run_next_test();
    };
    controllerState.onChannelClosed(Cr.NS_OK, true);
  };
}

function receiverDisconnect() {
  // initial state: controller and receiver are connected
  controllerState.state = State.CONNECTED;
  receiverState.state = State.CONNECTED;

  // step 1: controller send disconnect command
  receiverState.onChannelClosed(Cr.NS_OK, false);
  Assert.equal(receiverState.state, State.CLOSING, "receiver in closing state");

  mockControllerChannel.notifyDisconnected = function(reason) {
    Assert.equal(reason, Cr.NS_OK, "receive close reason");
    Assert.equal(controllerState.state, State.CLOSED, "controller in closed state");

    controllerState.onChannelClosed(Cr.NS_OK, true);
    Assert.equal(controllerState.state, State.CLOSED, "controller in closed state");

    mockReceiverChannel.notifyDisconnected = function(disconnectReason) {
      Assert.equal(disconnectReason, Cr.NS_OK, "receive close reason");
      Assert.equal(receiverState.state, State.CLOSED, "receiver in closed state");

      run_next_test();
    };
    receiverState.onChannelClosed(Cr.NS_OK, true);
  };
}

function abnormalDisconnect() {
  // initial state: controller and receiver are connected
  controllerState.state = State.CONNECTED;
  receiverState.state = State.CONNECTED;

  const testErrorReason = Cr.NS_ERROR_FAILURE;
  // step 1: controller send disconnect command
  controllerState.onChannelClosed(testErrorReason, false);
  Assert.equal(controllerState.state, State.CLOSING, "controller in closing state");

  mockReceiverChannel.notifyDisconnected = function(reason) {
    Assert.equal(reason, testErrorReason, "receive abnormal close reason");
    Assert.equal(receiverState.state, State.CLOSED, "receiver in closed state");

    receiverState.onChannelClosed(Cr.NS_OK, true);
    Assert.equal(receiverState.state, State.CLOSED, "receiver in closed state");

    mockControllerChannel.notifyDisconnected = function(disconnectReason) {
      Assert.equal(disconnectReason, testErrorReason, "receive abnormal close reason");
      Assert.equal(controllerState.state, State.CLOSED, "controller in closed state");

      run_next_test();
    };
    controllerState.onChannelClosed(Cr.NS_OK, true);
  };
}

add_test(connect);
add_test(launch);
add_test(terminateByController);
add_test(terminateByReceiver);
add_test(exchangeSDP);
add_test(disconnect);
add_test(receiverDisconnect);
add_test(abnormalDisconnect);