#include "ui_manager.hpp"

#include "application.hpp"
#include "exception.hpp"
#include "graph/graph.hpp"

namespace cru::ui {
namespace {
void GetSystemCaretInfo(CaretInfo* caret_info) {
  caret_info->caret_blink_duration =
      std::chrono::milliseconds(::GetCaretBlinkTime());
  DWORD caret_width;
  if (!::SystemParametersInfoW(SPI_GETCARETWIDTH, 0, &caret_width, 0))
    throw Win32Error(::GetLastError(), "Failed to get system caret width.");
  caret_info->half_caret_width = caret_width / 2.0f;
}

Microsoft::WRL::ComPtr<ID2D1Brush> CreateSolidBrush(
    graph::GraphManager* graph_manager, const D2D1_COLOR_F& color) {
  const auto device_context = graph_manager->GetD2D1DeviceContext();
  Microsoft::WRL::ComPtr<ID2D1SolidColorBrush> solid_color_brush;
  device_context->CreateSolidColorBrush(color, &solid_color_brush);
  return solid_color_brush;
}

Microsoft::WRL::ComPtr<IDWriteTextFormat> CreateDefaultTextFormat(
    graph::GraphManager* graph_manager) {
  const auto dwrite_factory = graph_manager->GetDWriteFactory();

  Microsoft::WRL::ComPtr<IDWriteTextFormat> text_format;

  ThrowIfFailed(dwrite_factory->CreateTextFormat(
      L"等线", nullptr, DWRITE_FONT_WEIGHT_NORMAL, DWRITE_FONT_STYLE_NORMAL,
      DWRITE_FONT_STRETCH_NORMAL, 24.0, L"zh-cn", &text_format));

  ThrowIfFailed(text_format->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_CENTER));
  ThrowIfFailed(
      text_format->SetParagraphAlignment(DWRITE_PARAGRAPH_ALIGNMENT_CENTER));

  return text_format;
}
}  // namespace

PredefineResources::PredefineResources(graph::GraphManager* graph_manager)
    : text_block_selection_brush{CreateSolidBrush(
          graph_manager, D2D1::ColorF(D2D1::ColorF::LightSkyBlue))},
      text_block_text_brush{
          CreateSolidBrush(graph_manager, D2D1::ColorF(D2D1::ColorF::Black))},
      text_block_text_format{CreateDefaultTextFormat(graph_manager)},
      debug_layout_out_border_brush{
          CreateSolidBrush(graph_manager, D2D1::ColorF(D2D1::ColorF::Crimson))},
      debug_layout_margin_brush{CreateSolidBrush(
          graph_manager, D2D1::ColorF(D2D1::ColorF::LightCoral, 0.25f))},
      debug_layout_padding_brush{CreateSolidBrush(
          graph_manager, D2D1::ColorF(D2D1::ColorF::SkyBlue, 0.25f))} {}

UiManager* UiManager::GetInstance() {
  return Application::GetInstance()->ResolveSingleton<UiManager>(
      [](auto) { return new UiManager{}; });
}

UiManager::UiManager()
    : predefine_resources_(graph::GraphManager::GetInstance()) {
  GetSystemCaretInfo(&caret_info_);
}
}  // namespace cru::ui