/* 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";

/* import-globals-from ../../mochitest/role.js */
/* import-globals-from ../../mochitest/states.js */
loadScripts(
  { name: "role.js", dir: MOCHITESTS_DIR },
  { name: "states.js", dir: MOCHITESTS_DIR }
);

// AXTextStateChangeType enum values
const AXTextStateChangeTypeEdit = 1;

// AXTextEditType enum values
const AXTextEditTypeDelete = 1;
const AXTextEditTypeTyping = 3;

function testValueChangedEventData(
  macIface,
  data,
  expectedId,
  expectedChangeValue,
  expectedEditType,
  expectedWordAtLeft
) {
  is(
    data.AXTextChangeElement.getAttributeValue("AXDOMIdentifier"),
    expectedId,
    "Correct AXTextChangeElement"
  );
  is(
    data.AXTextStateChangeType,
    AXTextStateChangeTypeEdit,
    "Correct AXTextStateChangeType"
  );

  let changeValues = data.AXTextChangeValues;
  is(changeValues.length, 1, "One element in AXTextChangeValues");
  is(
    changeValues[0].AXTextChangeValue,
    expectedChangeValue,
    "Correct AXTextChangeValue"
  );
  is(
    changeValues[0].AXTextEditType,
    expectedEditType,
    "Correct AXTextEditType"
  );

  let textMarker = changeValues[0].AXTextChangeValueStartMarker;
  ok(textMarker, "There is a AXTextChangeValueStartMarker");
  let range = macIface.getParameterizedAttributeValue(
    "AXLeftWordTextMarkerRangeForTextMarker",
    textMarker
  );
  let str = macIface.getParameterizedAttributeValue(
    "AXStringForTextMarkerRange",
    range,
    "correct word before caret"
  );
  is(str, expectedWordAtLeft);
}

function matchWebArea(expectedId) {
  return (iface, data) => {
    return (
      iface.getAttributeValue("AXRole") == "AXWebArea" &&
      !!data &&
      data.AXTextChangeElement.getAttributeValue("AXDOMIdentifier") ==
        expectedId
    );
  };
}

function matchInput(expectedId) {
  return (iface, data) =>
    iface.getAttributeValue("AXDOMIdentifier") == expectedId && !!data;
}

async function synthKeyAndTestSelectionChanged(
  synthKey,
  synthEvent,
  expectedId,
  expectedSelectionString
) {
  let selectionChangedEvents = Promise.all([
    waitForMacEventWithInfo("AXSelectedTextChanged", matchWebArea(expectedId)),
    waitForMacEventWithInfo("AXSelectedTextChanged", matchInput(expectedId)),
  ]);

  EventUtils.synthesizeKey(synthKey, synthEvent);
  let [, inputEvent] = await selectionChangedEvents;
  is(
    inputEvent.data.AXTextChangeElement.getAttributeValue("AXDOMIdentifier"),
    expectedId,
    "Correct AXTextChangeElement"
  );

  let rangeString = inputEvent.macIface.getParameterizedAttributeValue(
    "AXStringForTextMarkerRange",
    inputEvent.data.AXSelectedTextMarkerRange
  );
  is(
    rangeString,
    expectedSelectionString,
    `selection has correct value (${expectedSelectionString})`
  );
}

async function synthKeyAndTestValueChanged(
  synthKey,
  synthEvent,
  expectedId,
  expectedTextSelectionId,
  expectedChangeValue,
  expectedEditType,
  expectedWordAtLeft
) {
  let valueChangedEvents = Promise.all([
    waitForMacEventWithInfo(
      "AXSelectedTextChanged",
      matchWebArea(expectedTextSelectionId)
    ),
    waitForMacEventWithInfo(
      "AXSelectedTextChanged",
      matchInput(expectedTextSelectionId)
    ),
    waitForMacEventWithInfo("AXValueChanged", matchWebArea(expectedId)),
    waitForMacEventWithInfo("AXValueChanged", matchInput(expectedId)),
  ]);

  EventUtils.synthesizeKey(synthKey, synthEvent);
  let [, , webareaEvent, inputEvent] = await valueChangedEvents;

  testValueChangedEventData(
    webareaEvent.macIface,
    webareaEvent.data,
    expectedId,
    expectedChangeValue,
    expectedEditType,
    expectedWordAtLeft
  );
  testValueChangedEventData(
    inputEvent.macIface,
    inputEvent.data,
    expectedId,
    expectedChangeValue,
    expectedEditType,
    expectedWordAtLeft
  );
}

async function focusIntoInputAndType(accDoc, inputId, innerContainerId) {
  let selectionId = innerContainerId ? innerContainerId : inputId;
  let input = getNativeInterface(accDoc, inputId);
  ok(!input.getAttributeValue("AXFocused"), "input is not focused");
  ok(input.isAttributeSettable("AXFocused"), "input is focusable");
  let events = Promise.all([
    waitForMacEvent(
      "AXFocusedUIElementChanged",
      iface => iface.getAttributeValue("AXDOMIdentifier") == inputId
    ),
    waitForMacEventWithInfo("AXSelectedTextChanged", matchWebArea(selectionId)),
    waitForMacEventWithInfo("AXSelectedTextChanged", matchInput(selectionId)),
  ]);
  input.setAttributeValue("AXFocused", true);
  await events;

  async function testTextInput(
    synthKey,
    expectedChangeValue,
    expectedWordAtLeft
  ) {
    await synthKeyAndTestValueChanged(
      synthKey,
      null,
      inputId,
      selectionId,
      expectedChangeValue,
      AXTextEditTypeTyping,
      expectedWordAtLeft
    );
  }

  await testTextInput("h", "h", "h");
  await testTextInput("e", "e", "he");
  await testTextInput("l", "l", "hel");
  await testTextInput("l", "l", "hell");
  await testTextInput("o", "o", "hello");
  await testTextInput(" ", " ", "hello");
  // You would expect this to be useless but this is what VO
  // consumes. I guess it concats the inserted text data to the
  // word to the left of the marker.
  await testTextInput("w", "w", " ");
  await testTextInput("o", "o", "wo");
  await testTextInput("r", "r", "wor");
  await testTextInput("l", "l", "worl");
  await testTextInput("d", "d", "world");

  async function testTextDelete(expectedChangeValue, expectedWordAtLeft) {
    await synthKeyAndTestValueChanged(
      "KEY_Backspace",
      null,
      inputId,
      selectionId,
      expectedChangeValue,
      AXTextEditTypeDelete,
      expectedWordAtLeft
    );
  }

  await testTextDelete("d", "worl");
  await testTextDelete("l", "wor");

  await synthKeyAndTestSelectionChanged("KEY_ArrowLeft", null, selectionId, "");
  await synthKeyAndTestSelectionChanged(
    "KEY_ArrowLeft",
    { shiftKey: true },
    selectionId,
    "o"
  );
  await synthKeyAndTestSelectionChanged(
    "KEY_ArrowLeft",
    { shiftKey: true },
    selectionId,
    "wo"
  );
  await synthKeyAndTestSelectionChanged("KEY_ArrowLeft", null, selectionId, "");
  await synthKeyAndTestSelectionChanged(
    "KEY_Home",
    { shiftKey: true },
    selectionId,
    "hello "
  );
  await synthKeyAndTestSelectionChanged("KEY_ArrowLeft", null, selectionId, "");
  await synthKeyAndTestSelectionChanged(
    "KEY_ArrowRight",
    { shiftKey: true, altKey: true },
    selectionId,
    "hello"
  );
}

// Test text input
addAccessibleTask(
  `<a href="#">link</a> <input id="input">`,
  async (browser, accDoc) => {
    await focusIntoInputAndType(accDoc, "input");
  }
);

// Test content editable
addAccessibleTask(
  `<div id="input" contentEditable="true" tabindex="0" role="textbox" aria-multiline="true"><div id="inner"><br /></div></div>`,
  async (browser, accDoc) => {
    await focusIntoInputAndType(accDoc, "input", "inner");
  }
);