// A common module to run tests on the AccessFu module

'use strict';

/*global isDeeply, getMainChromeWindow, SimpleTest, SpecialPowers, Logger,
  AccessFu, Utils, addMessageListener, currentTabDocument, currentBrowser*/

/**
  * A global variable holding an array of test functions.
  */
var gTestFuncs = [];
/**
  * A global Iterator for the array of test functions.
  */
var gIterator;

Components.utils.import('resource://gre/modules/Services.jsm');
Components.utils.import("resource://gre/modules/accessibility/Utils.jsm");
Components.utils.import("resource://gre/modules/accessibility/EventManager.jsm");
Components.utils.import("resource://gre/modules/accessibility/Gestures.jsm");

const dwellThreshold = GestureSettings.dwellThreshold;
const swipeMaxDuration = GestureSettings.swipeMaxDuration;
const maxConsecutiveGestureDelay = GestureSettings.maxConsecutiveGestureDelay;

// https://bugzilla.mozilla.org/show_bug.cgi?id=1001945 - sometimes
// SimpleTest.executeSoon timeout is bigger than the timer settings in
// GestureSettings that causes intermittents.
GestureSettings.dwellThreshold = dwellThreshold * 10;
GestureSettings.swipeMaxDuration = swipeMaxDuration * 10;
GestureSettings.maxConsecutiveGestureDelay = maxConsecutiveGestureDelay * 10;

var AccessFuTest = {

  addFunc: function AccessFuTest_addFunc(aFunc) {
    if (aFunc) {
      gTestFuncs.push(aFunc);
    }
  },

  _registerListener: function AccessFuTest__registerListener(aWaitForMessage, aListenerFunc) {
    var listener = {
      observe: function observe(aMessage) {
        // Ignore unexpected messages.
        if (!(aMessage instanceof Components.interfaces.nsIConsoleMessage)) {
          return;
        }
        if (aMessage.message.indexOf(aWaitForMessage) < 0) {
          return;
        }
        aListenerFunc.apply(listener);
      }
    };
    Services.console.registerListener(listener);
    return listener;
  },

  on_log: function AccessFuTest_on_log(aWaitForMessage, aListenerFunc) {
    return this._registerListener(aWaitForMessage, aListenerFunc);
  },

  off_log: function AccessFuTest_off_log(aListener) {
    Services.console.unregisterListener(aListener);
  },

  once_log: function AccessFuTest_once_log(aWaitForMessage, aListenerFunc) {
    return this._registerListener(aWaitForMessage,
      function listenAndUnregister() {
        Services.console.unregisterListener(this);
        aListenerFunc();
      });
  },

  _addObserver: function AccessFuTest__addObserver(aWaitForData, aListener) {
    var listener = function listener(aSubject, aTopic, aData) {
      var data = JSON.parse(aData)[1];
      // Ignore non-relevant outputs.
      if (!data) {
        return;
      }
      isDeeply(data.details, aWaitForData, "Data is correct");
      aListener.apply(listener);
    };
    Services.obs.addObserver(listener, 'accessibility-output', false);
    return listener;
  },

  on: function AccessFuTest_on(aWaitForData, aListener) {
    return this._addObserver(aWaitForData, aListener);
  },

  off: function AccessFuTest_off(aListener) {
    Services.obs.removeObserver(aListener, 'accessibility-output');
  },

  once: function AccessFuTest_once(aWaitForData, aListener) {
    return this._addObserver(aWaitForData, function observerAndRemove() {
      Services.obs.removeObserver(this, 'accessibility-output');
      aListener();
    });
  },

  _waitForExplicitFinish: false,

  waitForExplicitFinish: function AccessFuTest_waitForExplicitFinish() {
    this._waitForExplicitFinish = true;
  },

  finish: function AccessFuTest_finish() {
    // Disable the console service logging.
    Logger.test = false;
    Logger.logLevel = Logger.INFO;
    // Reset Gesture Settings.
    GestureSettings.dwellThreshold = dwellThreshold;
    GestureSettings.swipeMaxDuration = swipeMaxDuration;
    GestureSettings.maxConsecutiveGestureDelay = maxConsecutiveGestureDelay;
    // Finish through idle callback to let AccessFu._disable complete.
    SimpleTest.executeSoon(function () {
      AccessFu.detach();
      SimpleTest.finish();
    });
  },

  nextTest: function AccessFuTest_nextTest() {
    var result = gIterator.next();
    if (result.done) {
      this.finish();
      return;
    }
    var testFunc = result.value;
    testFunc();
  },

  runTests: function AccessFuTest_runTests(aAdditionalPrefs) {
    if (gTestFuncs.length === 0) {
      ok(false, "No tests specified!");
      SimpleTest.finish();
      return;
    }

    // Create an Iterator for gTestFuncs array.
    gIterator = (function*() {
      for (var testFunc of gTestFuncs) {
        yield testFunc;
      }
    })();

    // Start AccessFu and put it in stand-by.
    Components.utils.import("resource://gre/modules/accessibility/AccessFu.jsm");

    AccessFu.attach(getMainChromeWindow(window));

    AccessFu.readyCallback = function readyCallback() {
      // Enable logging to the console service.
      Logger.test = true;
      Logger.logLevel = Logger.DEBUG;
    };

    var prefs = [['accessibility.accessfu.notify_output', 1],
      ['dom.mozSettings.enabled', true]];
    prefs.push.apply(prefs, aAdditionalPrefs);

    SpecialPowers.pushPrefEnv({ 'set': prefs }, function () {
      if (AccessFuTest._waitForExplicitFinish) {
        // Run all test functions asynchronously.
        AccessFuTest.nextTest();
      } else {
        // Run all test functions synchronously.
        [testFunc() for (testFunc of gTestFuncs)]; // jshint ignore:line
        AccessFuTest.finish();
      }
    });
  }
};

function AccessFuContentTest(aFuncResultPairs) {
  this.queue = aFuncResultPairs;
}

AccessFuContentTest.prototype = {
  expected: [],
  currentAction: null,
  actionNum: -1,

  start: function(aFinishedCallback) {
    Logger.logLevel = Logger.DEBUG;
    this.finishedCallback = aFinishedCallback;
    var self = this;

    // Get top content message manager, and set it up.
    this.mms = [Utils.getMessageManager(currentBrowser())];
    this.setupMessageManager(this.mms[0], function () {
      // Get child message managers and set them up
      var frames = currentTabDocument().querySelectorAll('iframe');
      if (frames.length === 0) {
        self.pump();
        return;
      }

      var toSetup = 0;
      for (var i = 0; i < frames.length; i++ ) {
        var mm = Utils.getMessageManager(frames[i]);
        if (mm) {
          toSetup++;
          self.mms.push(mm);
          self.setupMessageManager(mm, function () {
            if (--toSetup === 0) {
              // All message managers are loaded and ready to go.
              self.pump();
            }
          });
        }
      }
    });
  },

  finish: function() {
    Logger.logLevel = Logger.INFO;
    for (var mm of this.mms) {
        mm.sendAsyncMessage('AccessFu:Stop');
        mm.removeMessageListener('AccessFu:Present', this);
        mm.removeMessageListener('AccessFu:Input', this);
        mm.removeMessageListener('AccessFu:CursorCleared', this);
        mm.removeMessageListener('AccessFu:Focused', this);
        mm.removeMessageListener('AccessFu:AriaHidden', this);
        mm.removeMessageListener('AccessFu:Ready', this);
        mm.removeMessageListener('AccessFu:ContentStarted', this);
      }
    if (this.finishedCallback) {
      this.finishedCallback();
    }
  },

  setupMessageManager:  function (aMessageManager, aCallback) {
    function contentScript() {
      addMessageListener('AccessFuTest:Focus', function (aMessage) {
        var elem = content.document.querySelector(aMessage.json.selector);
        if (elem) {
          if (aMessage.json.blur) {
            elem.blur();
          } else {
            elem.focus();
          }
        }
      });
    }

    aMessageManager.addMessageListener('AccessFu:Present', this);
    aMessageManager.addMessageListener('AccessFu:Input', this);
    aMessageManager.addMessageListener('AccessFu:CursorCleared', this);
    aMessageManager.addMessageListener('AccessFu:Focused', this);
    aMessageManager.addMessageListener('AccessFu:AriaHidden', this);
    aMessageManager.addMessageListener('AccessFu:Ready', function () {
      aMessageManager.addMessageListener('AccessFu:ContentStarted', aCallback);
      aMessageManager.sendAsyncMessage('AccessFu:Start',
        { buildApp: 'browser',
          androidSdkVersion: Utils.AndroidSdkVersion,
          logLevel: 'DEBUG',
          inTest: true });
    });

    aMessageManager.loadFrameScript(
      'chrome://global/content/accessibility/content-script.js', false);
    aMessageManager.loadFrameScript(
      'data:,(' + contentScript.toString() + ')();', false);
  },

  pump: function() {
    this.expected.shift();
    if (this.expected.length) {
      return;
    }

    var currentPair = this.queue.shift();

    if (currentPair) {
      this.actionNum++;
      this.currentAction = currentPair[0];
      if (typeof this.currentAction === 'function') {
        this.currentAction(this.mms[0]);
      } else if (this.currentAction) {
        this.mms[0].sendAsyncMessage(this.currentAction.name,
         this.currentAction.json);
      }

      this.expected = currentPair.slice(1, currentPair.length);

      if (!this.expected[0]) {
       this.pump();
     }
    } else {
      this.finish();
    }
  },

  receiveMessage: function(aMessage) {
    var expected = this.expected[0];

    if (!expected) {
      return;
    }

    var actionsString = typeof this.currentAction === 'function' ?
      this.currentAction.name + '()' : JSON.stringify(this.currentAction);

    if (typeof expected === 'string') {
      ok(true, 'Got ' + expected + ' after ' + actionsString);
      this.pump();
    } else if (expected.ignore && !expected.ignore(aMessage)) {
      expected.is(aMessage.json, 'after ' + actionsString +
        ' (' + this.actionNum + ')');
      expected.is_correct_focus();
      this.pump();
    }
  }
};

// Common content messages

var ContentMessages = {
  simpleMoveFirst: {
    name: 'AccessFu:MoveCursor',
    json: {
      action: 'moveFirst',
      rule: 'Simple',
      inputType: 'gesture',
      origin: 'top'
    }
  },

  simpleMoveLast: {
    name: 'AccessFu:MoveCursor',
    json: {
      action: 'moveLast',
      rule: 'Simple',
      inputType: 'gesture',
      origin: 'top'
    }
  },

  simpleMoveNext: {
    name: 'AccessFu:MoveCursor',
    json: {
      action: 'moveNext',
      rule: 'Simple',
      inputType: 'gesture',
      origin: 'top'
    }
  },

  simpleMovePrevious: {
    name: 'AccessFu:MoveCursor',
    json: {
      action: 'movePrevious',
      rule: 'Simple',
      inputType: 'gesture',
      origin: 'top'
    }
  },

  clearCursor: {
    name: 'AccessFu:ClearCursor',
    json: {
      origin: 'top'
    }
  },

  moveOrAdjustUp: function moveOrAdjustUp(aRule) {
    return {
      name: 'AccessFu:MoveCursor',
      json: {
        origin: 'top',
        action: 'movePrevious',
        inputType: 'gesture',
        rule: (aRule || 'Simple'),
        adjustRange: true
      }
    }
  },

  moveOrAdjustDown: function moveOrAdjustUp(aRule) {
    return {
      name: 'AccessFu:MoveCursor',
      json: {
        origin: 'top',
        action: 'moveNext',
        inputType: 'gesture',
        rule: (aRule || 'Simple'),
        adjustRange: true
      }
    }
  },

  focusSelector: function focusSelector(aSelector, aBlur) {
    return {
      name: 'AccessFuTest:Focus',
      json: {
        selector: aSelector,
        blur: aBlur
      }
    };
  },

  activateCurrent: function activateCurrent(aOffset) {
    return {
      name: 'AccessFu:Activate',
      json: {
        origin: 'top',
        offset: aOffset
      }
    };
  },

  moveNextBy: function moveNextBy(aGranularity) {
    return {
      name: 'AccessFu:MoveByGranularity',
      json: {
        direction: 'Next',
        granularity: this._granularityMap[aGranularity]
      }
    };
  },

  movePreviousBy: function movePreviousBy(aGranularity) {
    return {
      name: 'AccessFu:MoveByGranularity',
      json: {
        direction: 'Previous',
        granularity: this._granularityMap[aGranularity]
      }
    };
  },

  moveCaretNextBy: function moveCaretNextBy(aGranularity) {
    return {
      name: 'AccessFu:MoveCaret',
      json: {
        direction: 'Next',
        granularity: this._granularityMap[aGranularity]
      }
    };
  },

  moveCaretPreviousBy: function moveCaretPreviousBy(aGranularity) {
    return {
      name: 'AccessFu:MoveCaret',
      json: {
        direction: 'Previous',
        granularity: this._granularityMap[aGranularity]
      }
    };
  },

  _granularityMap: {
    'character': 1, // MOVEMENT_GRANULARITY_CHARACTER
    'word': 2, // MOVEMENT_GRANULARITY_WORD
    'paragraph': 8 // MOVEMENT_GRANULARITY_PARAGRAPH
  }
};

function ExpectedMessage (aName, aOptions) {
  this.name = aName;
  this.options = aOptions || {};
  this.json = {};
}

ExpectedMessage.prototype.lazyCompare = function(aReceived, aExpected, aInfo) {
  if (aExpected && !aReceived) {
    return [false, 'Expected something but got nothing -- ' + aInfo];
  }

  var matches = true;
  var delta = [];
  for (var attr in aExpected) {
    var expected = aExpected[attr];
    var received = aReceived[attr];
    if (typeof expected === 'object') {
      var [childMatches, childDelta] = this.lazyCompare(received, expected);
      if (!childMatches) {
        delta.push(attr + ' [ ' + childDelta + ' ]');
        matches = false;
      }
    } else {
      if (received !== expected) {
        delta.push(
          attr + ' [ expected ' + JSON.stringify(expected) +
          ' got ' + JSON.stringify(received) + ' ]');
        matches = false;
      }
    }
  }

  var msg = delta.length ? delta.join(' ') : 'Structures lazily match';
  return [matches, msg + ' -- ' + aInfo];
};

ExpectedMessage.prototype.is = function(aReceived, aInfo) {
  var checkFunc = this.options.todo ? 'todo' : 'ok';
  SimpleTest[checkFunc].apply(
    SimpleTest, this.lazyCompare(aReceived, this.json, aInfo));
};

ExpectedMessage.prototype.is_correct_focus = function(aInfo) {
  if (!this.options.focused) {
    return;
  }

  var checkFunc = this.options.focused_todo ? 'todo_is' : 'is';
  var doc = currentTabDocument();
  SimpleTest[checkFunc].apply(SimpleTest,
    [ doc.activeElement, doc.querySelector(this.options.focused),
      'Correct element is focused: ' + this.options.focused + ' -- ' + aInfo ]);
};

ExpectedMessage.prototype.ignore = function(aMessage) {
  return aMessage.name !== this.name;
};

function ExpectedPresent(aB2g, aAndroid, aOptions) {
  ExpectedMessage.call(this, 'AccessFu:Present', aOptions);
  if (aB2g) {
    this.json.b2g = aB2g;
  }

  if (aAndroid) {
    this.json.android = aAndroid;
  }
}

ExpectedPresent.prototype = Object.create(ExpectedMessage.prototype);

ExpectedPresent.prototype.is = function(aReceived, aInfo) {
  var received = this.extract_presenters(aReceived);

  for (var presenter of ['b2g', 'android']) {
    if (!this.options['no_' + presenter]) {
      var todo = this.options.todo || this.options[presenter + '_todo']
      SimpleTest[todo ? 'todo' : 'ok'].apply(
        SimpleTest, this.lazyCompare(received[presenter],
          this.json[presenter], aInfo + ' (' + presenter + ')'));
    }
  }
};

ExpectedPresent.prototype.extract_presenters = function(aReceived) {
  var received = { count: 0 };
  for (var presenter of aReceived) {
    if (presenter) {
      received[presenter.type.toLowerCase()] = presenter.details;
      received.count++;
    }
  }

  return received
};

ExpectedPresent.prototype.ignore = function(aMessage) {
  if (ExpectedMessage.prototype.ignore.call(this, aMessage)) {
    return true;
  }

  var received = this.extract_presenters(aMessage.json);
  return received.count === 0 ||
    (received.visual && received.visual.eventType === 'viewport-change') ||
    (received.android &&
      received.android[0].eventType === AndroidEvent.VIEW_SCROLLED);
};

function ExpectedCursorChange(aSpeech, aOptions) {
  ExpectedPresent.call(this, {
    eventType: 'vc-change',
    data: aSpeech
  }, [{
    eventType: 0x8000, // VIEW_ACCESSIBILITY_FOCUSED
  }], aOptions);
}

ExpectedCursorChange.prototype = Object.create(ExpectedPresent.prototype);

function ExpectedCursorTextChange(aSpeech, aStartOffset, aEndOffset, aOptions) {
  ExpectedPresent.call(this, {
    eventType: 'vc-change',
    data: aSpeech
  }, [{
    eventType: AndroidEvent.VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY,
    fromIndex: aStartOffset,
    toIndex: aEndOffset
  }], aOptions);

  // bug 980509
  this.options.b2g_todo = true;
}

ExpectedCursorTextChange.prototype =
  Object.create(ExpectedCursorChange.prototype);

function ExpectedClickAction(aOptions) {
  ExpectedPresent.call(this, {
    eventType: 'action',
    data: [{ string: 'clickAction' }]
  }, [{
    eventType: AndroidEvent.VIEW_CLICKED
  }], aOptions);
}

ExpectedClickAction.prototype = Object.create(ExpectedPresent.prototype);

function ExpectedCheckAction(aChecked, aOptions) {
  ExpectedPresent.call(this, {
    eventType: 'action',
    data: [{ string: aChecked ? 'checkAction' : 'uncheckAction' }]
  }, [{
    eventType: AndroidEvent.VIEW_CLICKED,
    checked: aChecked
  }], aOptions);
}

ExpectedCheckAction.prototype = Object.create(ExpectedPresent.prototype);

function ExpectedNameChange(aName, aOptions) {
  ExpectedPresent.call(this, {
    eventType: 'name-change',
    data: aName
  }, null, aOptions);
}

ExpectedNameChange.prototype = Object.create(ExpectedPresent.prototype);

function ExpectedValueChange(aValue, aOptions) {
  ExpectedPresent.call(this, {
    eventType: 'value-change',
    data: [aValue]
  }, null, aOptions);
}

ExpectedValueChange.prototype = Object.create(ExpectedPresent.prototype);

function ExpectedTextChanged(aValue, aOptions) {
  ExpectedPresent.call(this, {
    eventType: 'text-change',
    data: aValue
  }, null, aOptions);
}

ExpectedTextChanged.prototype = Object.create(ExpectedPresent.prototype);

function ExpectedEditState(aEditState, aOptions) {
  ExpectedMessage.call(this, 'AccessFu:Input', aOptions);
  this.json = aEditState;
}

ExpectedEditState.prototype = Object.create(ExpectedMessage.prototype);

function ExpectedTextSelectionChanged(aStart, aEnd, aOptions) {
  ExpectedPresent.call(this, null, [{
    eventType: AndroidEvent.VIEW_TEXT_SELECTION_CHANGED,
    brailleOutput: {
     selectionStart: aStart,
     selectionEnd: aEnd
   }}], aOptions);
}

ExpectedTextSelectionChanged.prototype =
  Object.create(ExpectedPresent.prototype);

function ExpectedTextCaretChanged(aFrom, aTo, aOptions) {
  ExpectedPresent.call(this, null, [{
    eventType: AndroidEvent.VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY,
    fromIndex: aFrom,
    toIndex: aTo
  }], aOptions);
}

ExpectedTextCaretChanged.prototype = Object.create(ExpectedPresent.prototype);

function ExpectedAnnouncement(aAnnouncement, aOptions) {
  ExpectedPresent.call(this, null, [{
    eventType: AndroidEvent.ANNOUNCEMENT,
    text: [ aAnnouncement],
    addedCount: aAnnouncement.length
  }], aOptions);
}

ExpectedAnnouncement.prototype = Object.create(ExpectedPresent.prototype);

function ExpectedNoMove(aOptions) {
  ExpectedPresent.call(this, {eventType: 'no-move' }, null, aOptions);
}

ExpectedNoMove.prototype = Object.create(ExpectedPresent.prototype);

var AndroidEvent = {
  VIEW_CLICKED: 0x01,
  VIEW_LONG_CLICKED: 0x02,
  VIEW_SELECTED: 0x04,
  VIEW_FOCUSED: 0x08,
  VIEW_TEXT_CHANGED: 0x10,
  WINDOW_STATE_CHANGED: 0x20,
  VIEW_HOVER_ENTER: 0x80,
  VIEW_HOVER_EXIT: 0x100,
  VIEW_SCROLLED: 0x1000,
  VIEW_TEXT_SELECTION_CHANGED: 0x2000,
  ANNOUNCEMENT: 0x4000,
  VIEW_ACCESSIBILITY_FOCUSED: 0x8000,
  VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY: 0x20000
};
