/* 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/. */

/**
 * Test that the reader mode button appears and works properly on
 * reader-able content.
 */
const TEST_PREFS = [
  ["reader.parse-on-load.enabled", true],
];

const TEST_PATH = "http://example.com/browser/browser/base/content/test/general/";

var readerButton = document.getElementById("reader-mode-button");

add_task(function* test_reader_button() {
  registerCleanupFunction(function() {
    // Reset test prefs.
    TEST_PREFS.forEach(([name, value]) => {
      Services.prefs.clearUserPref(name);
    });
    while (gBrowser.tabs.length > 1) {
      gBrowser.removeCurrentTab();
    }
  });

  // Set required test prefs.
  TEST_PREFS.forEach(([name, value]) => {
    Services.prefs.setBoolPref(name, value);
  });
  Services.prefs.setBoolPref("browser.reader.detectedFirstArticle", false);

  let tab = gBrowser.selectedTab = gBrowser.addTab();
  is_element_hidden(readerButton, "Reader mode button is not present on a new tab");
  ok(!UITour.isInfoOnTarget(window, "readerMode-urlBar"),
     "Info panel shouldn't appear without the reader mode button");
  ok(!Services.prefs.getBoolPref("browser.reader.detectedFirstArticle"),
     "Shouldn't have detected the first article");

  // Point tab to a test page that is reader-able.
  let url = TEST_PATH + "readerModeArticle.html";
  yield promiseTabLoadEvent(tab, url);
  yield promiseWaitForCondition(() => !readerButton.hidden);
  is_element_visible(readerButton, "Reader mode button is present on a reader-able page");
  ok(UITour.isInfoOnTarget(window, "readerMode-urlBar"),
     "Info panel should be anchored at the reader mode button");
  ok(Services.prefs.getBoolPref("browser.reader.detectedFirstArticle"),
     "Should have detected the first article");

  // Switch page into reader mode.
  readerButton.click();
  yield promiseTabLoadEvent(tab);
  ok(!UITour.isInfoOnTarget(window, "readerMode-urlBar"), "Info panel should have closed");

  let readerUrl = gBrowser.selectedBrowser.currentURI.spec;
  ok(readerUrl.startsWith("about:reader"), "about:reader loaded after clicking reader mode button");
  is_element_visible(readerButton, "Reader mode button is present on about:reader");

  is(gURLBar.value, readerUrl, "gURLBar value is about:reader URL");
  is(gURLBar.textValue, url.substring("http://".length), "gURLBar is displaying original article URL");

  // Switch page back out of reader mode.
  readerButton.click();
  yield promiseTabLoadEvent(tab);
  is(gBrowser.selectedBrowser.currentURI.spec, url,
    "Original page loaded after clicking active reader mode button");

  // Load a new tab that is NOT reader-able.
  let newTab = gBrowser.selectedTab = gBrowser.addTab();
  yield promiseTabLoadEvent(newTab, "about:robots");
  yield promiseWaitForCondition(() => readerButton.hidden);
  is_element_hidden(readerButton, "Reader mode button is not present on a non-reader-able page");

  // Switch back to the original tab to make sure reader mode button is still visible.
  gBrowser.removeCurrentTab();
  yield promiseWaitForCondition(() => !readerButton.hidden);
  is_element_visible(readerButton, "Reader mode button is present on a reader-able page");
});

add_task(function* test_getOriginalUrl() {
  let { ReaderMode } = Cu.import("resource://gre/modules/ReaderMode.jsm", {});
  let url = "http://foo.com/article.html";

  is(ReaderMode.getOriginalUrl("about:reader?url=" + encodeURIComponent(url)), url, "Found original URL from encoded URL");
  is(ReaderMode.getOriginalUrl("about:reader?foobar"), null, "Did not find original URL from malformed reader URL");
  is(ReaderMode.getOriginalUrl(url), null, "Did not find original URL from non-reader URL");

  let badUrl = "http://foo.com/?;$%^^";
  is(ReaderMode.getOriginalUrl("about:reader?url=" + encodeURIComponent(badUrl)), badUrl, "Found original URL from encoded malformed URL");
  is(ReaderMode.getOriginalUrl("about:reader?url=" + badUrl), badUrl, "Found original URL from non-encoded malformed URL");
});
