/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set sts=2 sw=2 et tw=80: */
"use strict";

add_task(async function testTabEvents() {
  async function background() {
    let events = [];
    let eventPromise;
    let checkEvents = () => {
      if (eventPromise && events.length >= eventPromise.names.length) {
        eventPromise.resolve();
      }
    };

    browser.tabs.onCreated.addListener(tab => {
      events.push({type: "onCreated", tab});
      checkEvents();
    });

    browser.tabs.onAttached.addListener((tabId, info) => {
      events.push(Object.assign({type: "onAttached", tabId}, info));
      checkEvents();
    });

    browser.tabs.onDetached.addListener((tabId, info) => {
      events.push(Object.assign({type: "onDetached", tabId}, info));
      checkEvents();
    });

    browser.tabs.onRemoved.addListener((tabId, info) => {
      events.push(Object.assign({type: "onRemoved", tabId}, info));
      checkEvents();
    });

    browser.tabs.onMoved.addListener((tabId, info) => {
      events.push(Object.assign({type: "onMoved", tabId}, info));
      checkEvents();
    });

    async function expectEvents(names) {
      browser.test.log(`Expecting events: ${names.join(", ")}`);

      await new Promise(resolve => {
        eventPromise = {names, resolve};
        checkEvents();
      });

      browser.test.assertEq(names.length, events.length, "Got expected number of events");
      for (let [i, name] of names.entries()) {
        browser.test.assertEq(name, i in events && events[i].type,
                              `Got expected ${name} event`);
      }
      return events.splice(0);
    }

    try {
      browser.test.log("Create second browser window");

      let windows = await Promise.all([
        browser.windows.getCurrent(),
        browser.windows.create({url: "about:blank"}),
      ]);

      let windowId = windows[0].id;
      let otherWindowId = windows[1].id;

      let [created] = await expectEvents(["onCreated"]);
      let initialTab = created.tab;


      browser.test.log("Create tab in window 1");
      let tab = await browser.tabs.create({windowId, index: 0, url: "about:blank"});
      let oldIndex = tab.index;
      browser.test.assertEq(0, oldIndex, "Tab has the expected index");

      [created] = await expectEvents(["onCreated"]);
      browser.test.assertEq(tab.id, created.tab.id, "Got expected tab ID");
      browser.test.assertEq(oldIndex, created.tab.index, "Got expected tab index");


      browser.test.log("Move tab to window 2");
      await browser.tabs.move([tab.id], {windowId: otherWindowId, index: 0});

      let [detached, attached] = await expectEvents(["onDetached", "onAttached"]);
      browser.test.assertEq(oldIndex, detached.oldPosition, "Expected old index");
      browser.test.assertEq(windowId, detached.oldWindowId, "Expected old window ID");

      browser.test.assertEq(0, attached.newPosition, "Expected new index");
      browser.test.assertEq(otherWindowId, attached.newWindowId, "Expected new window ID");


      browser.test.log("Move tab within the same window");
      let [moved] = await browser.tabs.move([tab.id], {index: 1});
      browser.test.assertEq(1, moved.index, "Expected new index");

      [moved] = await expectEvents(["onMoved"]);
      browser.test.assertEq(tab.id, moved.tabId, "Expected tab ID");
      browser.test.assertEq(0, moved.fromIndex, "Expected old index");
      browser.test.assertEq(1, moved.toIndex, "Expected new index");
      browser.test.assertEq(otherWindowId, moved.windowId, "Expected window ID");


      browser.test.log("Remove tab");
      await browser.tabs.remove(tab.id);
      let [removed] = await expectEvents(["onRemoved"]);

      browser.test.assertEq(tab.id, removed.tabId, "Expected removed tab ID");
      browser.test.assertEq(otherWindowId, removed.windowId, "Expected removed tab window ID");
      // Note: We want to test for the actual boolean value false here.
      browser.test.assertEq(false, removed.isWindowClosing, "Expected isWindowClosing value");


      browser.test.log("Close second window");
      await browser.windows.remove(otherWindowId);
      [removed] = await expectEvents(["onRemoved"]);
      browser.test.assertEq(initialTab.id, removed.tabId, "Expected removed tab ID");
      browser.test.assertEq(otherWindowId, removed.windowId, "Expected removed tab window ID");
      browser.test.assertEq(true, removed.isWindowClosing, "Expected isWindowClosing value");


      browser.test.log("Create additional tab in window 1");
      tab = await browser.tabs.create({windowId, url: "about:blank"});
      await expectEvents(["onCreated"]);


      browser.test.log("Create a new window, adopting the new tab");
      // We have to explicitly wait for the event here, since its timing is
      // not predictable.
      let promiseAttached = new Promise(resolve => {
        browser.tabs.onAttached.addListener(function listener(tabId) {
          browser.tabs.onAttached.removeListener(listener);
          resolve();
        });
      });

      let [window] = await Promise.all([
        browser.windows.create({tabId: tab.id}),
        promiseAttached,
      ]);

      [detached, attached] = await expectEvents(["onDetached", "onAttached"]);

      browser.test.assertEq(tab.id, detached.tabId, "Expected onDetached tab ID");

      browser.test.assertEq(tab.id, attached.tabId, "Expected onAttached tab ID");
      browser.test.assertEq(0, attached.newPosition, "Expected onAttached new index");
      browser.test.assertEq(window.id, attached.newWindowId,
                            "Expected onAttached new window id");

      browser.test.log("Close the new window");
      await browser.windows.remove(window.id);

      browser.test.notifyPass("tabs-events");
    } catch (e) {
      browser.test.fail(`${e} :: ${e.stack}`);
      browser.test.notifyFail("tabs-events");
    }
  }

  let extension = ExtensionTestUtils.loadExtension({
    manifest: {
      "permissions": ["tabs"],
    },

    background,
  });

  await extension.startup();
  await extension.awaitFinish("tabs-events");
  await extension.unload();
});

add_task(async function testTabEventsSize() {
  function background() {
    function sendSizeMessages(tab, type) {
      browser.test.sendMessage(`${type}-dims`, {width: tab.width, height: tab.height});
    }

    browser.tabs.onCreated.addListener(tab => {
      sendSizeMessages(tab, "on-created");
    });

    browser.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {
      if (changeInfo.status == "complete") {
        sendSizeMessages(tab, "on-updated");
      }
    });

    browser.test.onMessage.addListener(async (msg, arg) => {
      if (msg === "create-tab") {
        let tab = await browser.tabs.create({url: "http://example.com/"});
        sendSizeMessages(tab, "create");
        browser.test.sendMessage("created-tab-id", tab.id);
      } else if (msg === "update-tab") {
        let tab = await browser.tabs.update(arg, {url: "http://example.org/"});
        sendSizeMessages(tab, "update");
      } else if (msg === "remove-tab") {
        browser.tabs.remove(arg);
        browser.test.sendMessage("tab-removed");
      }
    });

    browser.test.sendMessage("ready");
  }

  let extension = ExtensionTestUtils.loadExtension({
    manifest: {
      "permissions": ["tabs"],
    },
    background,
  });

  const RESOLUTION_PREF = "layout.css.devPixelsPerPx";
  registerCleanupFunction(() => {
    SpecialPowers.clearUserPref(RESOLUTION_PREF);
  });

  function checkDimensions(dims, type) {
    is(dims.width, gBrowser.selectedBrowser.clientWidth, `tab from ${type} reports expected width`);
    is(dims.height, gBrowser.selectedBrowser.clientHeight, `tab from ${type} reports expected height`);
  }

  await Promise.all([extension.startup(), extension.awaitMessage("ready")]);

  for (let resolution of [2, 1]) {
    SpecialPowers.setCharPref(RESOLUTION_PREF, String(resolution));
    is(window.devicePixelRatio, resolution, "window has the required resolution");

    extension.sendMessage("create-tab");
    let tabId = await extension.awaitMessage("created-tab-id");

    checkDimensions(await extension.awaitMessage("create-dims"), "create");
    checkDimensions(await extension.awaitMessage("on-created-dims"), "onCreated");
    checkDimensions(await extension.awaitMessage("on-updated-dims"), "onUpdated");

    extension.sendMessage("update-tab", tabId);

    checkDimensions(await extension.awaitMessage("update-dims"), "update");
    checkDimensions(await extension.awaitMessage("on-updated-dims"), "onUpdated");

    extension.sendMessage("remove-tab", tabId);
    await extension.awaitMessage("tab-removed");
  }

  await extension.unload();
  SpecialPowers.clearUserPref(RESOLUTION_PREF);
});

add_task(async function testTabRemovalEvent() {
  async function background() {
    let events = [];

    function awaitLoad(tabId) {
      return new Promise(resolve => {
        browser.tabs.onUpdated.addListener(function listener(tabId_, changed, tab) {
          if (tabId == tabId_ && changed.status == "complete") {
            browser.tabs.onUpdated.removeListener(listener);
            resolve();
          }
        });
      });
    }

    chrome.tabs.onRemoved.addListener((tabId, info) => {
      browser.test.assertEq(0, events.length, "No events recorded before onRemoved.");
      events.push("onRemoved");
      browser.test.log("Make sure the removed tab is not available in the tabs.query callback.");
      chrome.tabs.query({}, tabs => {
        for (let tab of tabs) {
          browser.test.assertTrue(tab.id != tabId, "Tab query should not include removed tabId");
        }
      });
    });

    try {
      let url = "http://example.com/browser/browser/components/extensions/test/browser/context.html";
      let tab = await browser.tabs.create({url: url});
      await awaitLoad(tab.id);

      chrome.tabs.onActivated.addListener(info => {
        browser.test.assertEq(1, events.length, "One event recorded before onActivated.");
        events.push("onActivated");
        browser.test.assertEq("onRemoved", events[0], "onRemoved fired before onActivated.");
        browser.test.notifyPass("tabs-events");
      });

      await browser.tabs.remove(tab.id);
    } catch (e) {
      browser.test.fail(`${e} :: ${e.stack}`);
      browser.test.notifyFail("tabs-events");
    }
  }

  let extension = ExtensionTestUtils.loadExtension({
    manifest: {
      "permissions": ["tabs"],
    },

    background,
  });

  await extension.startup();
  await extension.awaitFinish("tabs-events");
  await extension.unload();
});
