XPCOMUtils.defineLazyModuleGetter(this, "Promise",
  "resource://gre/modules/Promise.jsm");
Components.utils.import("resource://gre/modules/Timer.jsm", this);

const TEST_PAGE_URI = "data:text/html;charset=utf-8,The letter s.";
// Using 'javascript' schema to bypass E10SUtils.canLoadURIInProcess, because
// it does not allow 'data:' URI to be loaded in the parent process.
const E10S_PARENT_TEST_PAGE_URI = "javascript:document.write('The letter s.');";

/**
 * Makes sure that the findbar hotkeys (' and /) event listeners
 * are added to the system event group and do not get blocked
 * by calling stopPropagation on a keypress event on a page.
 */
add_task(function* test_hotkey_event_propagation() {
  info("Ensure hotkeys are not affected by stopPropagation.");

  // Opening new tab
  let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_PAGE_URI);
  let browser = gBrowser.getBrowserForTab(tab);
  let findbar = gBrowser.getFindBar();

  // Pressing these keys open the findbar.
  const HOTKEYS = ["/", "'"];

  // Checking if findbar appears when any hotkey is pressed.
  for (let key of HOTKEYS) {
    is(findbar.hidden, true, "Findbar is hidden now.");
    gBrowser.selectedTab = tab;
    yield promiseFocus();
    yield BrowserTestUtils.sendChar(key, browser);
    is(findbar.hidden, false, "Findbar should not be hidden.");
    yield closeFindbarAndWait(findbar);
  }

  // Stop propagation for all keyboard events.
  let frameScript = () => {
    const stopPropagation = e => e.stopImmediatePropagation();
    let window = content.document.defaultView;
    window.removeEventListener("keydown", stopPropagation);
    window.removeEventListener("keypress", stopPropagation);
    window.removeEventListener("keyup", stopPropagation);
  };

  let mm = browser.messageManager;
  mm.loadFrameScript("data:,(" + frameScript.toString() + ")();", false);

  // Checking if findbar still appears when any hotkey is pressed.
  for (let key of HOTKEYS) {
    is(findbar.hidden, true, "Findbar is hidden now.");
    gBrowser.selectedTab = tab;
    yield promiseFocus();
    yield BrowserTestUtils.sendChar(key, browser);
    is(findbar.hidden, false, "Findbar should not be hidden.");
    yield closeFindbarAndWait(findbar);
  }

  gBrowser.removeTab(tab);
});

add_task(function* test_not_found() {
  info("Check correct 'Phrase not found' on new tab");

  let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_PAGE_URI);

  // Search for the first word.
  yield promiseFindFinished("--- THIS SHOULD NEVER MATCH ---", false);
  let findbar = gBrowser.getFindBar();
  is(findbar._findStatusDesc.textContent, findbar._notFoundStr,
     "Findbar status text should be 'Phrase not found'");

  gBrowser.removeTab(tab);
});

add_task(function* test_found() {
  let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_PAGE_URI);

  // Search for a string that WILL be found, with 'Highlight All' on
  yield promiseFindFinished("S", true);
  ok(!gBrowser.getFindBar()._findStatusDesc.textContent,
     "Findbar status should be empty");

  gBrowser.removeTab(tab);
});

// Setting first findbar to case-sensitive mode should not affect
// new tab find bar.
add_task(function* test_tabwise_case_sensitive() {
  let tab1 = yield BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_PAGE_URI);
  let findbar1 = gBrowser.getFindBar();

  let tab2 = yield BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_PAGE_URI);
  let findbar2 = gBrowser.getFindBar();

  // Toggle case sensitivity for first findbar
  findbar1.getElement("find-case-sensitive").click();

  gBrowser.selectedTab = tab1;

  // Not found for first tab.
  yield promiseFindFinished("S", true);
  is(findbar1._findStatusDesc.textContent, findbar1._notFoundStr,
     "Findbar status text should be 'Phrase not found'");

  gBrowser.selectedTab = tab2;

  // But it didn't affect the second findbar.
  yield promiseFindFinished("S", true);
  ok(!findbar2._findStatusDesc.textContent, "Findbar status should be empty");

  gBrowser.removeTab(tab1);
  gBrowser.removeTab(tab2);
});

/**
 * Navigating from a web page (for example mozilla.org) to an internal page
 * (like about:addons) might trigger a change of browser's remoteness.
 * 'Remoteness change' means that rendering page content moves from child
 * process into the parent process or the other way around.
 * This test ensures that findbar properly handles such a change.
 */
add_task(function * test_reinitialization_at_remoteness_change() {
  // This test only makes sence in e10s evironment.
  if (!gMultiProcessBrowser) {
    info("Skipping this test because of non-e10s environment.");
    return true;
  }

  info("Ensure findbar re-initialization at remoteness change.");

  // Load a remote page and trigger findbar construction.
  let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_PAGE_URI);
  let browser = gBrowser.getBrowserForTab(tab);
  let findbar = gBrowser.getFindBar();

  // Findbar should operate normally.
  yield promiseFindFinished("z", false);
  is(findbar._findStatusDesc.textContent, findbar._notFoundStr,
     "Findbar status text should be 'Phrase not found'");

  yield promiseFindFinished("s", false);
  ok(!findbar._findStatusDesc.textContent, "Findbar status should be empty");

  // Moving browser into the parent process and reloading sample data.
  ok(browser.isRemoteBrowser, "Browser should be remote now.");
  yield promiseRemotenessChange(tab, false);
  yield BrowserTestUtils.loadURI(browser, E10S_PARENT_TEST_PAGE_URI);
  ok(!browser.isRemoteBrowser, "Browser should not be remote any more.");

  // Findbar should keep operating normally after remoteness change.
  yield promiseFindFinished("z", false);
  is(findbar._findStatusDesc.textContent, findbar._notFoundStr,
     "Findbar status text should be 'Phrase not found'");

  yield promiseFindFinished("s", false);
  ok(!findbar._findStatusDesc.textContent, "Findbar status should be empty");

  yield BrowserTestUtils.removeTab(tab);
});

/**
 * Ensure that the initial typed characters aren't lost immediately after
 * opening the find bar.
 */
add_task(function* () {
  // This test only makes sence in e10s evironment.
  if (!gMultiProcessBrowser) {
    info("Skipping this test because of non-e10s environment.");
    return true;
  }

  let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_PAGE_URI);
  let browser = tab.linkedBrowser;

  ok(!gFindBarInitialized, "findbar isn't initialized yet");

  let findBar = gFindBar;
  let initialValue = findBar._findField.value;

  EventUtils.synthesizeKey("f", { accelKey: true }, window);

  let promises = [
    BrowserTestUtils.sendChar("a", browser),
    BrowserTestUtils.sendChar("b", browser),
    BrowserTestUtils.sendChar("c", browser)
  ];

  isnot(document.activeElement, findBar._findField.inputField,
    "findbar is not yet focused");
  is(findBar._findField.value, initialValue, "still has initial find query");

  yield Promise.all(promises);
  is(document.activeElement, findBar._findField.inputField,
    "findbar is now focused");
  is(findBar._findField.value, "abc", "abc fully entered as find query");

  yield BrowserTestUtils.removeTab(tab);
});

function promiseFindFinished(searchText, highlightOn) {
  let deferred = Promise.defer();

  let findbar = gBrowser.getFindBar();
  findbar.startFind(findbar.FIND_NORMAL);
  let highlightElement = findbar.getElement("highlight");
  if (highlightElement.checked != highlightOn)
    highlightElement.click();
  executeSoon(() => {
    findbar._findField.value = searchText;

    let resultListener;
    // When highlighting is on the finder sends a second "FOUND" message after
    // the search wraps. This causes timing problems with e10s. waitMore
    // forces foundOrTimeout wait for the second "FOUND" message before
    // resolving the promise.
    let waitMore = highlightOn;
    let findTimeout = setTimeout(() => foundOrTimedout(null), 2000);
    let foundOrTimedout = function(aData) {
      if (aData !== null && waitMore) {
        waitMore = false;
        return;
      }
      if (aData === null)
        info("Result listener not called, timeout reached.");
      clearTimeout(findTimeout);
      findbar.browser.finder.removeResultListener(resultListener);
      deferred.resolve();
    }

    resultListener = {
      onFindResult: foundOrTimedout
    };
    findbar.browser.finder.addResultListener(resultListener);
    findbar._find();
  });

  return deferred.promise;
}

/**
 * A promise-like wrapper for the waitForFocus helper.
 */
function promiseFocus() {
  return new Promise((resolve) => {
    waitForFocus(function(){
      resolve();
    }, content);
  });
}

function promiseRemotenessChange(tab, shouldBeRemote) {
  return new Promise((resolve) => {
    let browser = gBrowser.getBrowserForTab(tab);
    tab.addEventListener("TabRemotenessChange", function listener() {
      tab.removeEventListener("TabRemotenessChange", listener);
      resolve();
    });
    gBrowser.updateBrowserRemoteness(browser, shouldBeRemote);
  });
}
