// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/sessions/tab_restore_service_factory.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_live_tab_context.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/interactive_test_utils.h"
#include "components/sessions/core/tab_restore_service.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/url_constants.h"
#include "content/public/test/browser_test_utils.h"

typedef InProcessBrowserTest BrowserTabRestoreTest;

void AwaitTabsReady(content::DOMMessageQueue* message_queue, int tabs) {
  for (int i = 0; i < tabs; ++i) {
    std::string message;
    EXPECT_TRUE(message_queue->WaitForMessage(&message));
    EXPECT_EQ("\"READY\"", message);
  }
}

void CheckVisbility(TabStripModel* tab_strip_model, int visible_index) {
  for (int i = 0; i < tab_strip_model->count(); ++i) {
    content::WebContents* contents = tab_strip_model->GetWebContentsAt(i);
    std::string document_visibility_state;
    const char kGetStateJS[] = "window.domAutomationController.send("
        "window.document.visibilityState);";
    EXPECT_TRUE(content::ExecuteScriptAndExtractString(
        contents, kGetStateJS, &document_visibility_state));
    if (i == visible_index) {
      EXPECT_EQ("visible", document_visibility_state);
    } else {
      EXPECT_EQ("hidden", document_visibility_state);
    }
  }
}

void CreateTestTabs(Browser* browser) {
  GURL test_page(ui_test_utils::GetTestUrl(base::FilePath(),
      base::FilePath(FILE_PATH_LITERAL("tab-restore-visibility.html"))));
  ui_test_utils::NavigateToURLWithDisposition(
      browser, test_page, WindowOpenDisposition::NEW_FOREGROUND_TAB,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
  ui_test_utils::NavigateToURLWithDisposition(
      browser, test_page, WindowOpenDisposition::NEW_BACKGROUND_TAB,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
}

IN_PROC_BROWSER_TEST_F(BrowserTabRestoreTest, RecentTabsMenuTabDisposition) {
  // Create tabs.
  CreateTestTabs(browser());
  EXPECT_EQ(3, browser()->tab_strip_model()->count());

  // Create a new browser.
  ui_test_utils::NavigateToURLWithDisposition(
      browser(), GURL(url::kAboutBlankURL), WindowOpenDisposition::NEW_WINDOW,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_BROWSER);
  BrowserList* active_browser_list = BrowserList::GetInstance();
  EXPECT_EQ(2u, active_browser_list->size());

  // Close the first browser.
  CloseBrowserSynchronously(browser());
  EXPECT_EQ(1u, active_browser_list->size());

  // Restore tabs using the browser's recent tabs menu.
  content::DOMMessageQueue queue;
  Browser* browser = active_browser_list->get(0);
  RecentTabsSubMenuModel menu(nullptr, browser);
  menu.ExecuteCommand(
      RecentTabsSubMenuModel::GetFirstRecentTabsCommandId(), 0);
  AwaitTabsReady(&queue, 2);

  // There should be 3 restored tabs in the new browser.
  EXPECT_EQ(2u, active_browser_list->size());
  browser = active_browser_list->get(1);
  EXPECT_EQ(3, browser->tab_strip_model()->count());
  // For the two test tabs we've just received "READY" DOM message.
  // But there won't be such message from the "about:blank" tab.
  // And it is possible that TabLoader hasn't loaded it yet.
  // Thus we should wait for "load stop" event before we will perform
  // CheckVisbility on "about:blank".
  {
    const content::WebContents* about_blank_contents =
        browser->tab_strip_model()->GetWebContentsAt(0);
    EXPECT_EQ("about:blank", about_blank_contents->GetURL().spec());
    if (about_blank_contents->IsLoading() ||
        about_blank_contents->GetController().NeedsReload()) {
      content::WindowedNotificationObserver load_stop_observer(
          content::NOTIFICATION_LOAD_STOP,
          content::Source<content::NavigationController>(
              &about_blank_contents->GetController()));
      load_stop_observer.Wait();
    }
  }

  // The middle tab only should have visible disposition.
  CheckVisbility(browser->tab_strip_model(), 1);
}

IN_PROC_BROWSER_TEST_F(BrowserTabRestoreTest, DelegateRestoreTabDisposition) {
  // Create tabs.
  CreateTestTabs(browser());
  EXPECT_EQ(3, browser()->tab_strip_model()->count());

  // Create a new browser.
  ui_test_utils::NavigateToURLWithDisposition(
      browser(), GURL(url::kAboutBlankURL), WindowOpenDisposition::NEW_WINDOW,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_BROWSER);
  BrowserList* active_browser_list = BrowserList::GetInstance();
  EXPECT_EQ(2u, active_browser_list->size());

  // Close the first browser.
  CloseBrowserSynchronously(browser());
  EXPECT_EQ(1u, active_browser_list->size());

  // Check the browser has a delegated restore service.
  Browser* browser = active_browser_list->get(0);
  sessions::TabRestoreService* service =
      TabRestoreServiceFactory::GetForProfile(browser->profile());
  bool has_tab_restore_service = !!service;
  ASSERT_TRUE(has_tab_restore_service);
  sessions::LiveTabContext* context =
      BrowserLiveTabContext::FindContextForWebContents(
          browser->tab_strip_model()->GetActiveWebContents());
  bool has_live_tab_context = !!context;
  ASSERT_TRUE(has_live_tab_context);

  // Restore tabs using that delegated restore service.
  content::DOMMessageQueue queue;
  service->RestoreMostRecentEntry(context);
  AwaitTabsReady(&queue, 2);

  // There should be 3 restored tabs in the new browser.
  EXPECT_EQ(2u, active_browser_list->size());
  browser = active_browser_list->get(1);
  EXPECT_EQ(3, browser->tab_strip_model()->count());
  // The same as in RecentTabsMenuTabDisposition test case.
  // See there for the explanation.
  {
    const content::WebContents* about_blank_contents =
        browser->tab_strip_model()->GetWebContentsAt(0);
    EXPECT_EQ("about:blank", about_blank_contents->GetURL().spec());
    if (about_blank_contents->IsLoading() ||
        about_blank_contents->GetController().NeedsReload()) {
      content::WindowedNotificationObserver load_stop_observer(
          content::NOTIFICATION_LOAD_STOP,
          content::Source<content::NavigationController>(
              &about_blank_contents->GetController()));
      load_stop_observer.Wait();
    }
  }

  // The middle tab only should have visible disposition.
  CheckVisbility(browser->tab_strip_model(), 1);
}