// 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 <memory>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "chrome/browser/extensions/extension_uninstall_dialog.h"
#include "chrome/browser/ui/app_list/app_list_service.h"
#include "chrome/browser/ui/browser_dialogs.h"
#include "chrome/browser/ui/views/harmony/chrome_layout_provider.h"
#include "chrome/browser/ui/views/harmony/chrome_typography.h"
#include "chrome/grit/generated_resources.h"
#include "components/constrained_window/constrained_window_views.h"
#include "components/strings/grit/components_strings.h"
#include "extensions/common/constants.h"
#include "extensions/common/extension.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/ui_features.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/layer.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/image/image_skia_operations.h"
#include "ui/views/controls/button/checkbox.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/controls/label.h"
#include "ui/views/layout/box_layout.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
#include "ui/views/window/dialog_delegate.h"

namespace {

class ExtensionUninstallDialogDelegateView;

// Views implementation of the uninstall dialog.
class ExtensionUninstallDialogViews
    : public extensions::ExtensionUninstallDialog {
 public:
  ExtensionUninstallDialogViews(
      Profile* profile,
      gfx::NativeWindow parent,
      extensions::ExtensionUninstallDialog::Delegate* delegate);
  ~ExtensionUninstallDialogViews() override;

  // Called when the ExtensionUninstallDialogDelegate has been destroyed to make
  // sure we invalidate pointers. This object will also be freed.
  void DialogDelegateDestroyed();

  // Forwards the accept and cancels to the delegate.
  void DialogAccepted(bool handle_report_abuse);
  void DialogCanceled();

 private:
  void Show() override;

  ExtensionUninstallDialogDelegateView* view_ = nullptr;

  DISALLOW_COPY_AND_ASSIGN(ExtensionUninstallDialogViews);
};

// The dialog's view, owned by the views framework.
class ExtensionUninstallDialogDelegateView : public views::DialogDelegateView {
 public:
  // Constructor for view component of dialog. triggering_extension may be null
  // if the uninstall dialog was manually triggered (from chrome://extensions).
  ExtensionUninstallDialogDelegateView(
      ExtensionUninstallDialogViews* dialog_view,
      const std::string& extension_name,
      const extensions::Extension* triggering_extension,
      const gfx::ImageSkia* image);
  ~ExtensionUninstallDialogDelegateView() override;

  // Called when the ExtensionUninstallDialog has been destroyed to make sure
  // we invalidate pointers.
  void DialogDestroyed() { dialog_ = NULL; }

 private:
  // views::DialogDelegateView:
  base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
  bool Accept() override;
  bool Cancel() override;
  gfx::Size CalculatePreferredSize() const override;

  // views::WidgetDelegate:
  ui::ModalType GetModalType() const override { return ui::MODAL_TYPE_WINDOW; }
  base::string16 GetWindowTitle() const override;
  gfx::ImageSkia GetWindowIcon() override { return image_; }
  bool ShouldShowWindowIcon() const override { return true; }
  bool ShouldShowCloseButton() const override { return false; }

  ExtensionUninstallDialogViews* dialog_;
  const base::string16 extension_name_;

  views::Label* heading_;
  views::Checkbox* report_abuse_checkbox_;
  gfx::ImageSkia image_;

  DISALLOW_COPY_AND_ASSIGN(ExtensionUninstallDialogDelegateView);
};

ExtensionUninstallDialogViews::ExtensionUninstallDialogViews(
    Profile* profile,
    gfx::NativeWindow parent,
    extensions::ExtensionUninstallDialog::Delegate* delegate)
    : extensions::ExtensionUninstallDialog(profile, parent, delegate) {}

ExtensionUninstallDialogViews::~ExtensionUninstallDialogViews() {
  // Close the widget (the views framework will delete view_).
  if (view_) {
    view_->DialogDestroyed();
    view_->GetWidget()->CloseNow();
  }
}

void ExtensionUninstallDialogViews::Show() {
  view_ = new ExtensionUninstallDialogDelegateView(
      this, extension()->name(), triggering_extension(), &icon());
  constrained_window::CreateBrowserModalDialogViews(view_, parent())->Show();
}

void ExtensionUninstallDialogViews::DialogDelegateDestroyed() {
  // Checks view_ to ensure OnDialogClosed() will not be called twice.
  if (view_) {
    view_ = nullptr;
    OnDialogClosed(CLOSE_ACTION_CANCELED);
  }
}

void ExtensionUninstallDialogViews::DialogAccepted(bool report_abuse_checked) {
  // The widget gets destroyed when the dialog is accepted.
  DCHECK(view_);
  view_->DialogDestroyed();
  view_ = nullptr;
  OnDialogClosed(report_abuse_checked ?
      CLOSE_ACTION_UNINSTALL_AND_REPORT_ABUSE : CLOSE_ACTION_UNINSTALL);
}

void ExtensionUninstallDialogViews::DialogCanceled() {
  // The widget gets destroyed when the dialog is canceled.
  DCHECK(view_);
  view_->DialogDestroyed();
  view_ = nullptr;
  OnDialogClosed(CLOSE_ACTION_CANCELED);
}

ExtensionUninstallDialogDelegateView::ExtensionUninstallDialogDelegateView(
    ExtensionUninstallDialogViews* dialog_view,
    const std::string& extension_name,
    const extensions::Extension* triggering_extension,
    const gfx::ImageSkia* image)
    : dialog_(dialog_view),
      extension_name_(base::UTF8ToUTF16(extension_name)),
      report_abuse_checkbox_(nullptr),
      image_(gfx::ImageSkiaOperations::CreateResizedImage(
          *image,
          skia::ImageOperations::ResizeMethod::RESIZE_GOOD,
          gfx::Size(extension_misc::EXTENSION_ICON_SMALL,
                    extension_misc::EXTENSION_ICON_SMALL))) {
  ChromeLayoutProvider* provider = ChromeLayoutProvider::Get();
  SetLayoutManager(new views::BoxLayout(
      views::BoxLayout::kVertical,
      provider->GetDialogInsetsForContentType(views::TEXT, views::TEXT),
      provider->GetDistanceMetric(views::DISTANCE_RELATED_CONTROL_VERTICAL)));

  if (triggering_extension) {
    heading_ = new views::Label(
        l10n_util::GetStringFUTF16(
            IDS_EXTENSION_PROMPT_UNINSTALL_TRIGGERED_BY_EXTENSION,
            base::UTF8ToUTF16(triggering_extension->name())),
        CONTEXT_BODY_TEXT_LARGE, STYLE_SECONDARY);
    heading_->SetMultiLine(true);
    heading_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
    heading_->SetAllowCharacterBreak(true);
    AddChildView(heading_);
  }

  if (dialog_->ShouldShowReportAbuseCheckbox()) {
    if (triggering_extension) {
      report_abuse_checkbox_ = new views::Checkbox(l10n_util::GetStringFUTF16(
          IDS_EXTENSION_PROMPT_UNINSTALL_REPORT_ABUSE_FROM_EXTENSION,
          extension_name_));
    } else {
      report_abuse_checkbox_ = new views::Checkbox(l10n_util::GetStringUTF16(
          IDS_EXTENSION_PROMPT_UNINSTALL_REPORT_ABUSE));
    }
    AddChildView(report_abuse_checkbox_);
  }

  chrome::RecordDialogCreation(chrome::DialogIdentifier::EXTENSION_UNINSTALL);
}

ExtensionUninstallDialogDelegateView::~ExtensionUninstallDialogDelegateView() {
  // If we're here, 2 things could have happened. Either the user closed the
  // dialog nicely and one of the installed/canceled methods has been called
  // (in which case dialog_ will be null), *or* neither of them have been
  // called and we are being forced closed by our parent widget. In this case,
  // we need to make sure to notify dialog_ not to call us again, since we're
  // about to be freed by the Widget framework.
  if (dialog_)
    dialog_->DialogDelegateDestroyed();
}

base::string16 ExtensionUninstallDialogDelegateView::GetDialogButtonLabel(
    ui::DialogButton button) const {
  return l10n_util::GetStringUTF16((button == ui::DIALOG_BUTTON_OK) ?
      IDS_EXTENSION_PROMPT_UNINSTALL_BUTTON : IDS_CANCEL);
}

bool ExtensionUninstallDialogDelegateView::Accept() {
  if (dialog_) {
    dialog_->DialogAccepted(report_abuse_checkbox_ &&
                            report_abuse_checkbox_->checked());
  }
  return true;
}

bool ExtensionUninstallDialogDelegateView::Cancel() {
  if (dialog_)
    dialog_->DialogCanceled();
  return true;
}

gfx::Size ExtensionUninstallDialogDelegateView::CalculatePreferredSize() const {
  const int width = ChromeLayoutProvider::Get()->GetDistanceMetric(
      DISTANCE_MODAL_DIALOG_PREFERRED_WIDTH);
  return gfx::Size(width, GetHeightForWidth(width));
}

base::string16 ExtensionUninstallDialogDelegateView::GetWindowTitle() const {
  return l10n_util::GetStringFUTF16(IDS_EXTENSION_PROMPT_UNINSTALL_TITLE,
                                    extension_name_);
}

}  // namespace

#if !defined(OS_MACOSX) || BUILDFLAG(MAC_VIEWS_BROWSER)

// static
extensions::ExtensionUninstallDialog*
extensions::ExtensionUninstallDialog::Create(Profile* profile,
                                             gfx::NativeWindow parent,
                                             Delegate* delegate) {
  return CreateViews(profile, parent, delegate);
}

#endif  // !OS_MACOSX || MAC_VIEWS_BROWSER

// static
extensions::ExtensionUninstallDialog*
extensions::ExtensionUninstallDialog::CreateViews(Profile* profile,
                                                  gfx::NativeWindow parent,
                                                  Delegate* delegate) {
  return new ExtensionUninstallDialogViews(profile, parent, delegate);
}