/* 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/. */

/**
 Ensure that frameset history works properly when restoring a tab,
 provided that the frameset is static.
 */

// Loading a toplevel frameset
add_task(async function() {
  let testURL = getRootDirectory(gTestPath) + "browser_frame_history_index.html";
  let tab = gBrowser.addTab(testURL);
  gBrowser.selectedTab = tab;

  info("Opening a page with three frames, 4 loads should take place");
  await waitForLoadsInBrowser(tab.linkedBrowser, 4);

  let browser_b = tab.linkedBrowser.contentDocument.getElementsByTagName("frame")[1];
  let document_b = browser_b.contentDocument;
  let links = document_b.getElementsByTagName("a");

  // We're going to click on the first link, so listen for another load event
  info("Clicking on link 1, 1 load should take place");
  let promise = waitForLoadsInBrowser(tab.linkedBrowser, 1);
  EventUtils.sendMouseEvent({type: "click"}, links[0], browser_b.contentWindow);
  await promise;

  info("Clicking on link 2, 1 load should take place");
  promise = waitForLoadsInBrowser(tab.linkedBrowser, 1);
  EventUtils.sendMouseEvent({type: "click"}, links[1], browser_b.contentWindow);
  await promise;

  info("Close then un-close page, 4 loads should take place");
  await promiseRemoveTab(tab);
  let newTab = ss.undoCloseTab(window, 0);
  await waitForLoadsInBrowser(newTab.linkedBrowser, 4);

  info("Go back in time, 1 load should take place");
  gBrowser.goBack();
  await waitForLoadsInBrowser(newTab.linkedBrowser, 1);

  let expectedURLEnds = ["a.html", "b.html", "c1.html"];
  let frames = newTab.linkedBrowser.contentDocument.getElementsByTagName("frame");
  for (let i = 0; i < frames.length; i++) {
    is(frames[i].contentDocument.location,
       getRootDirectory(gTestPath) + "browser_frame_history_" + expectedURLEnds[i],
       "frame " + i + " has the right url");
  }
  gBrowser.removeTab(newTab);
});

// Loading the frameset inside an iframe
add_task(async function() {
  let testURL = getRootDirectory(gTestPath) + "browser_frame_history_index2.html";
  let tab = gBrowser.addTab(testURL);
  gBrowser.selectedTab = tab;

  info("iframe: Opening a page with an iframe containing three frames, 5 loads should take place");
  await waitForLoadsInBrowser(tab.linkedBrowser, 5);

  let browser_b = tab.linkedBrowser.contentDocument.
    getElementById("iframe").contentDocument.
    getElementsByTagName("frame")[1];
  let document_b = browser_b.contentDocument;
  let links = document_b.getElementsByTagName("a");

  // We're going to click on the first link, so listen for another load event
  info("iframe: Clicking on link 1, 1 load should take place");
  let promise = waitForLoadsInBrowser(tab.linkedBrowser, 1);
  EventUtils.sendMouseEvent({type: "click"}, links[0], browser_b.contentWindow);
  await promise;

  info("iframe: Clicking on link 2, 1 load should take place");
  promise = waitForLoadsInBrowser(tab.linkedBrowser, 1);
  EventUtils.sendMouseEvent({type: "click"}, links[1], browser_b.contentWindow);
  await promise;

  info("iframe: Close then un-close page, 5 loads should take place");
  await promiseRemoveTab(tab);
  let newTab = ss.undoCloseTab(window, 0);
  await waitForLoadsInBrowser(newTab.linkedBrowser, 5);

  info("iframe: Go back in time, 1 load should take place");
  gBrowser.goBack();
  await waitForLoadsInBrowser(newTab.linkedBrowser, 1);

  let expectedURLEnds = ["a.html", "b.html", "c1.html"];
  let frames = newTab.linkedBrowser.contentDocument.
    getElementById("iframe").contentDocument.
        getElementsByTagName("frame");
  for (let i = 0; i < frames.length; i++) {
    is(frames[i].contentDocument.location,
       getRootDirectory(gTestPath) + "browser_frame_history_" + expectedURLEnds[i],
       "frame " + i + " has the right url");
  }
  gBrowser.removeTab(newTab);
});

// Now, test that we don't record history if the iframe is added dynamically
add_task(async function() {
  // Start with an empty history
    let blankState = JSON.stringify({
      windows: [{
        tabs: [{ entries: [{ url: "about:blank", triggeringPrincipal_base64 }] }],
        _closedTabs: []
      }],
      _closedWindows: []
    });
    ss.setBrowserState(blankState);

  let testURL = getRootDirectory(gTestPath) + "browser_frame_history_index_blank.html";
  let tab = gBrowser.addTab(testURL);
  gBrowser.selectedTab = tab;
  await waitForLoadsInBrowser(tab.linkedBrowser, 1);

  info("dynamic: Opening a page with an iframe containing three frames, 4 dynamic loads should take place");
  let doc = tab.linkedBrowser.contentDocument;
  let iframe = doc.createElement("iframe");
  iframe.id = "iframe";
  iframe.src = "browser_frame_history_index.html";
  doc.body.appendChild(iframe);
  await waitForLoadsInBrowser(tab.linkedBrowser, 4);

  let browser_b = tab.linkedBrowser.contentDocument.
    getElementById("iframe").contentDocument.
    getElementsByTagName("frame")[1];
  let document_b = browser_b.contentDocument;
  let links = document_b.getElementsByTagName("a");

  // We're going to click on the first link, so listen for another load event
  info("dynamic: Clicking on link 1, 1 load should take place");
  let promise = waitForLoadsInBrowser(tab.linkedBrowser, 1);
  EventUtils.sendMouseEvent({type: "click"}, links[0], browser_b.contentWindow);
  await promise;

  info("dynamic: Clicking on link 2, 1 load should take place");
  promise = waitForLoadsInBrowser(tab.linkedBrowser, 1);
  EventUtils.sendMouseEvent({type: "click"}, links[1], browser_b.contentWindow);
  await promise;

  info("Check in the state that we have not stored this history");
  let state = ss.getBrowserState();
  info(JSON.stringify(JSON.parse(state), null, "\t"));
  is(state.indexOf("c1.html"), -1, "History entry was not stored in the session state");
  gBrowser.removeTab(tab);
});

// helper functions
function waitForLoadsInBrowser(aBrowser, aLoadCount) {
  return new Promise(resolve => {
    let loadCount = 0;
    aBrowser.addEventListener("load", function(aEvent) {
      if (++loadCount < aLoadCount) {
        info("Got " + loadCount + " loads, waiting until we have " + aLoadCount);
        return;
      }

      aBrowser.removeEventListener("load", arguments.callee, true);
      resolve();
    }, true);
  });
}

function timeout(delay, task) {
  return new Promise((resolve, reject) => {
    setTimeout(() => resolve(true), delay);
    task.then(() => resolve(false), reject);
  });
}
