// Copyright (c) 2012 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/ui/extensions/extension_install_ui_default.h"

#include "base/bind.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/extensions/theme_installed_infobar_delegate.h"
#include "chrome/browser/infobars/infobar_service.h"
#include "chrome/browser/prefs/incognito_mode_prefs.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/themes/theme_service.h"
#include "chrome/browser/themes/theme_service_factory.h"
#include "chrome/browser/ui/app_list/app_list_service.h"
#include "chrome/browser/ui/app_list/app_list_util.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_dialogs.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_navigator.h"
#include "chrome/browser/ui/browser_tabstrip.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/host_desktop.h"
#include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
#include "chrome/browser/ui/simple_message_box.h"
#include "chrome/browser/ui/singleton_tabs.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/common/url_constants.h"
#include "chrome/grit/generated_resources.h"
#include "components/infobars/core/confirm_infobar_delegate.h"
#include "components/infobars/core/infobar.h"
#include "components/search/search.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/web_contents.h"
#include "extensions/browser/install/crx_installer_error.h"
#include "extensions/common/extension.h"
#include "grit/components_strings.h"
#include "ui/base/l10n/l10n_util.h"

#if defined(USE_ASH)
#include "ash/shell.h"
#endif

using content::BrowserThread;
using content::WebContents;
using extensions::Extension;

namespace {

Browser* FindOrCreateVisibleBrowser(Profile* profile) {
  // TODO(mpcomplete): remove this workaround for http://crbug.com/244246
  // after fixing http://crbug.com/38676.
  if (!IncognitoModePrefs::CanOpenBrowser(profile))
    return NULL;
  chrome::ScopedTabbedBrowserDisplayer displayer(
      profile, chrome::GetActiveDesktop());
  Browser* browser = displayer.browser();
  if (browser->tab_strip_model()->count() == 0)
    chrome::AddTabAt(browser, GURL(), -1, true);
  return browser;
}

void ShowExtensionInstalledBubble(const extensions::Extension* extension,
                                  Profile* profile,
                                  const SkBitmap& icon) {
  Browser* browser = FindOrCreateVisibleBrowser(profile);
  if (browser)
    chrome::ShowExtensionInstalledBubble(extension, browser, icon);
}

// Helper class to put up an infobar when installation fails.
class ErrorInfoBarDelegate : public ConfirmInfoBarDelegate {
 public:
  // Creates an error infobar and delegate and adds the infobar to
  // |infobar_service|.
  static void Create(InfoBarService* infobar_service,
                     const extensions::CrxInstallerError& error);

 private:
  explicit ErrorInfoBarDelegate(const extensions::CrxInstallerError& error);
  ~ErrorInfoBarDelegate() override;

  // ConfirmInfoBarDelegate:
  base::string16 GetMessageText() const override;
  int GetButtons() const override;
  base::string16 GetLinkText() const override;
  bool LinkClicked(WindowOpenDisposition disposition) override;

  extensions::CrxInstallerError error_;

  DISALLOW_COPY_AND_ASSIGN(ErrorInfoBarDelegate);
};

// static
void ErrorInfoBarDelegate::Create(InfoBarService* infobar_service,
                                  const extensions::CrxInstallerError& error) {
  infobar_service->AddInfoBar(infobar_service->CreateConfirmInfoBar(
      scoped_ptr<ConfirmInfoBarDelegate>(new ErrorInfoBarDelegate(error))));
}

ErrorInfoBarDelegate::ErrorInfoBarDelegate(
    const extensions::CrxInstallerError& error)
    : ConfirmInfoBarDelegate(),
      error_(error) {
}

ErrorInfoBarDelegate::~ErrorInfoBarDelegate() {
}

base::string16 ErrorInfoBarDelegate::GetMessageText() const {
  return error_.message();
}

int ErrorInfoBarDelegate::GetButtons() const {
  return BUTTON_OK;
}

base::string16 ErrorInfoBarDelegate::GetLinkText() const {
  return (error_.type() == extensions::CrxInstallerError::ERROR_OFF_STORE) ?
      l10n_util::GetStringUTF16(IDS_LEARN_MORE) : base::string16();
}

bool ErrorInfoBarDelegate::LinkClicked(WindowOpenDisposition disposition) {
  InfoBarService::WebContentsFromInfoBar(infobar())->OpenURL(
      content::OpenURLParams(
          GURL("http://support.google.com/chrome_webstore/?p=crx_warning"),
          content::Referrer(),
          (disposition == CURRENT_TAB) ? NEW_FOREGROUND_TAB : disposition,
          ui::PAGE_TRANSITION_LINK, false));
  return false;
}

}  // namespace

ExtensionInstallUIDefault::ExtensionInstallUIDefault(
    content::BrowserContext* context)
    : profile_(Profile::FromBrowserContext(context)),
      skip_post_install_ui_(false),
      previous_using_system_theme_(false),
      use_app_installed_bubble_(false) {
  // |profile| can be NULL during tests.
  if (profile_) {
    // Remember the current theme in case the user presses undo.
    const Extension* previous_theme =
        ThemeServiceFactory::GetThemeForProfile(profile_);
    if (previous_theme)
      previous_theme_id_ = previous_theme->id();
    previous_using_system_theme_ =
        ThemeServiceFactory::GetForProfile(profile_)->UsingSystemTheme();
  }
}

ExtensionInstallUIDefault::~ExtensionInstallUIDefault() {}

void ExtensionInstallUIDefault::OnInstallSuccess(const Extension* extension,
                                                 const SkBitmap* icon) {
  if (skip_post_install_ui_)
    return;

  if (!profile_) {
    // TODO(zelidrag): Figure out what exact conditions cause crash
    // http://crbug.com/159437 and write browser test to cover it.
    NOTREACHED();
    return;
  }

  if (extension->is_theme()) {
    ThemeInstalledInfoBarDelegate::Create(
        extension, profile_, previous_theme_id_, previous_using_system_theme_);
    return;
  }

  // Extensions aren't enabled by default in incognito so we confirm
  // the install in a normal window.
  Profile* current_profile = profile_->GetOriginalProfile();
  if (extension->is_app()) {
    bool use_bubble = false;

#if defined(TOOLKIT_VIEWS)  || defined(OS_MACOSX)
    use_bubble = use_app_installed_bubble_;
#endif

    if (IsAppLauncherEnabled()) {
      // TODO(tapted): ExtensionInstallUI should retain the desktop type from
      // the browser used to initiate the flow. http://crbug.com/308360.
      AppListService::Get(chrome::GetActiveDesktop())
          ->ShowForAppInstall(current_profile, extension->id(), false);
      return;
    }

    if (use_bubble) {
      ShowExtensionInstalledBubble(extension, current_profile, *icon);
      return;
    }

    OpenAppInstalledUI(extension->id());
    return;
  }

  ShowExtensionInstalledBubble(extension, current_profile, *icon);
}

void ExtensionInstallUIDefault::OnInstallFailure(
    const extensions::CrxInstallerError& error) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  if (disable_failure_ui_for_tests() || skip_post_install_ui_)
    return;

  Browser* browser =
      chrome::FindLastActiveWithProfile(profile_, chrome::GetActiveDesktop());
  if (!browser)  // Can be NULL in unittests.
    return;
  WebContents* web_contents =
      browser->tab_strip_model()->GetActiveWebContents();
  if (!web_contents)
    return;
  ErrorInfoBarDelegate::Create(InfoBarService::FromWebContents(web_contents),
                               error);
}

void ExtensionInstallUIDefault::OpenAppInstalledUI(const std::string& app_id) {
#if defined(OS_CHROMEOS)
  // App Launcher always enabled on ChromeOS, so always handled in
  // OnInstallSuccess.
  NOTREACHED();
#else
  Profile* current_profile = profile_->GetOriginalProfile();
  Browser* browser = FindOrCreateVisibleBrowser(current_profile);
  if (browser) {
    GURL url(chrome::IsInstantExtendedAPIEnabled()
                 ? chrome::kChromeUIAppsURL
                 : chrome::kChromeUINewTabURL);
    chrome::NavigateParams params(
        chrome::GetSingletonTabNavigateParams(browser, url));
    chrome::Navigate(&params);

    content::NotificationService::current()->Notify(
        chrome::NOTIFICATION_APP_INSTALLED_TO_NTP,
        content::Source<WebContents>(params.target_contents),
        content::Details<const std::string>(&app_id));
  }
#endif
}

void ExtensionInstallUIDefault::SetUseAppInstalledBubble(bool use_bubble) {
  use_app_installed_bubble_ = use_bubble;
}

void ExtensionInstallUIDefault::SetSkipPostInstallUI(bool skip_ui) {
  skip_post_install_ui_ = skip_ui;
}

gfx::NativeWindow ExtensionInstallUIDefault::GetDefaultInstallDialogParent() {
  Browser* browser =
      chrome::FindLastActiveWithProfile(profile_, chrome::GetActiveDesktop());
  if (browser) {
    content::WebContents* contents =
        browser->tab_strip_model()->GetActiveWebContents();
    return contents->GetTopLevelNativeWindow();
  }
  return NULL;
}