// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/ui/views/lens/lens_region_search_instructions_view.h"

#include "base/functional/bind.h"
#include "chrome/app/vector_icons/vector_icons.h"
#include "chrome/browser/ui/color/chrome_color_id.h"
#include "components/lens/lens_features.h"
#include "components/strings/grit/components_strings.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/base/mojom/dialog_button.mojom.h"
#include "ui/base/ui_base_features.h"
#include "ui/gfx/font_list.h"
#include "ui/gfx/paint_vector_icon.h"
#include "ui/views/bubble/bubble_dialog_delegate_view.h"
#include "ui/views/controls/button/image_button.h"
#include "ui/views/controls/button/image_button_factory.h"
#include "ui/views/controls/highlight_path_generator.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/controls/label.h"
#include "ui/views/layout/flex_layout.h"
#include "ui/views/layout/flex_layout_types.h"
#include "ui/views/layout/layout_provider.h"
#include "ui/views/vector_icons.h"

namespace lens {

// Spec states a font size of 14px.
constexpr int kTextFontSize = 14;
constexpr int kCloseButtonExtraMargin = 4;
constexpr int kCloseButtonSize = 17;
constexpr int kCornerRadius = 18;

LensRegionSearchInstructionsView::LensRegionSearchInstructionsView(
    views::View* anchor_view,
    base::OnceClosure close_callback,
    base::OnceClosure escape_callback,
    const LayoutParams& layout_params,
    int text_message_id)
    : views::BubbleDialogDelegateView(
          anchor_view,
          views::BubbleBorder::Arrow::BOTTOM_CENTER,
          views::BubbleBorder::Shadow::STANDARD_SHADOW),
      layout_params_(layout_params),
      text_message_id_(text_message_id) {
  // The cancel close_callback is called when VKEY_ESCAPE is hit.
  SetCancelCallback(std::move(escape_callback));

  // Create a close button that is always white instead of conforming to
  // native theme.
  close_button_ = views::CreateVectorImageButton(std::move(close_callback));
  close_button_->SetTooltipText(l10n_util::GetStringUTF16(IDS_ACCNAME_CLOSE));
}

LensRegionSearchInstructionsView::~LensRegionSearchInstructionsView() = default;

void LensRegionSearchInstructionsView::Init() {
  SetLayoutManager(std::make_unique<views::FlexLayout>())
      ->SetOrientation(views::LayoutOrientation::kHorizontal)
      .SetCollapseMargins(true);

  set_margins(gfx::Insets::TLBR(
      layout_params_.label_button_insets.top(), layout_params_.left_margin,
      layout_params_.label_button_insets.bottom(),
      layout_params_.close_button_margin + kCloseButtonExtraMargin));
  SetButtons(static_cast<int>(ui::mojom::DialogButton::kNone));
  set_close_on_deactivate(false);
  set_corner_radius(kCornerRadius);
  SetBackgroundColor(kColorFeatureLensPromoBubbleBackground);

  // Add the leading drag selection icon.
  auto selection_icon_view = std::make_unique<views::ImageView>(
      ui::ImageModel::FromVectorIcon(views::kDragGeneralSelectionCustomIcon,
                                     kColorFeatureLensPromoBubbleForeground,
                                     layout_params_.vector_icon_size));
  AddChildView(std::move(selection_icon_view));

  gfx::Font default_font;
  // We need to derive a font size delta between our desired font size and the
  // platform font size. There is no option to specify a constant font size in
  // the font list.
  int font_size_delta = kTextFontSize - default_font.GetFontSize();
  auto label = std::make_unique<views::Label>(
      l10n_util::GetStringUTF16(text_message_id_));
  label->SetFontList(gfx::FontList().Derive(font_size_delta, gfx::Font::NORMAL,
                                            gfx::Font::Weight::MEDIUM));
  label->SetHorizontalAlignment(gfx::HorizontalAlignment::ALIGN_CENTER);
  label->SetVerticalAlignment(gfx::VerticalAlignment::ALIGN_MIDDLE);
  // Set label margins to vector icons in chips, including adjustments for the
  // extra margin that the close button sets below.
  label->SetProperty(
      views::kMarginsKey,
      gfx::Insets::TLBR(
          0, layout_params_.label_horizontal_distance, 0,
          layout_params_.label_horizontal_distance - kCloseButtonExtraMargin));
  label_ = AddChildView(std::move(label));
  label_->SetBackgroundColor(kColorFeatureLensPromoBubbleBackground);
  label_->SetEnabledColor(kColorFeatureLensPromoBubbleForeground);

  close_button_->SetImageHorizontalAlignment(views::ImageButton::ALIGN_CENTER);
  close_button_->SetProperty(
      views::kMarginsKey, gfx::Insets::TLBR(0, kCloseButtonExtraMargin, 0, 0));
  // Make sure the hover background behind the button is a circle, rather than a
  // rounded square.
  views::InstallCircleHighlightPathGenerator(close_button_.get());
  constructed_close_button_ = AddChildView(std::move(close_button_));
  views::SetImageFromVectorIconWithColor(
      constructed_close_button_,
      ::features::IsRoundedIconsEnabled() ? views::kCloseIcon
                                          : views::kIcCloseOldIcon,
      kCloseButtonSize,
      {kColorFeatureLensPromoBubbleForeground,
       kColorFeatureLensPromoBubbleForeground});
}

gfx::Rect LensRegionSearchInstructionsView::GetBubbleBounds() {
  gfx::Rect bubble_rect = views::BubbleDialogDelegateView::GetBubbleBounds();
  // Since we should be centered and positioned on top of the web view, adjust
  // the bubble position to contain a top margin to the top container view.
  bubble_rect.set_y(bubble_rect.y() + bubble_rect.height() +
                    layout_params_.vertical_distance);
  return bubble_rect;
}

BEGIN_METADATA(LensRegionSearchInstructionsView)
END_METADATA

}  // namespace lens