/*
 * Bug 1366167 - Tests that the "Enable DRM" prompt shows if EME is requested while EME is disabled.
 */

const TEST_URL =
  getRootDirectory(gTestPath).replace("chrome://mochitests/content",
  "https://example.com") + "empty_file.html";

add_task(async function() {
  await BrowserTestUtils.withNewTab(TEST_URL, async function(browser) {
    // Note: SpecialPowers.pushPrefEnv has problems with the "Enable DRM"
    // button on the notification box toggling the prefs. So manually
    // set/unset the prefs the UI we're testing toggles.
    let emeWasEnabled = Services.prefs.getBoolPref("media.eme.enabled", false);
    let cdmWasEnabled = Services.prefs.getBoolPref("media.gmp-widevinecdm.enabled", false);

    // Restore the preferences to their pre-test state on test finish.
    registerCleanupFunction(function() {
        Services.prefs.setBoolPref("media.eme.enabled", emeWasEnabled);
        Services.prefs.setBoolPref("media.gmp-widevinecdm.enabled", cdmWasEnabled);
    });

    // Turn off EME and Widevine CDM.
    Services.prefs.setBoolPref("media.eme.enabled", false);
    Services.prefs.setBoolPref("media.gmp-widevinecdm.enabled", false);

    // Have content request access to Widevine, UI should drop down to
    // prompt user to enable DRM.
    let result = await ContentTask.spawn(browser, {}, async function() {
      try {
        let config = [{
          initDataTypes: ["webm"],
          videoCapabilities: [{contentType: 'video/webm; codecs="vp9"'}],
        }];
        await content.navigator.requestMediaKeySystemAccess("com.widevine.alpha", config);
      } catch (ex) {
        return {rejected: true};
      }
      return {rejected: false};
    });
    is(result.rejected, true, "EME request should be denied because EME disabled.");

    // Verify the UI prompt showed.
    let box = gBrowser.getNotificationBox(browser);
    let notification = box.currentNotification;

    ok(notification, "Notification should be visible");
    is(notification.value, "drmContentDisabled",
       "Should be showing the right notification");

    // Verify the "Enable DRM" button is there.
    let buttons = notification.querySelectorAll(".notification-button");
    is(buttons.length, 1, "Should have one button.");

    // Prepare a Promise that should resolve when the "Enable DRM" button's
    // page reload completes.
    let refreshPromise = BrowserTestUtils.browserLoaded(browser);
    buttons[0].click();

    // Wait for the reload to complete.
    await refreshPromise;

    // Verify clicking the "Enable DRM" button enabled DRM.
    let enabled = Services.prefs.getBoolPref("media.eme.enabled", true);
    is(enabled, true, "EME should be enabled after click on 'Enable DRM' button");
  });
});