#include "cru/win/graph/graph_manager.hpp"

#include "cru/win/exception.hpp"

#include <cassert>

namespace cru::win::graph {
GraphManager* GraphManager::GetInstance() {
  static GraphManager* instance = new GraphManager();
  return instance;
}

GraphManager::GraphManager() {
  UINT creation_flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;

#ifdef CRU_DEBUG
  creation_flags |= D3D11_CREATE_DEVICE_DEBUG;
#endif

  const D3D_FEATURE_LEVEL feature_levels[] = {
      D3D_FEATURE_LEVEL_11_1, D3D_FEATURE_LEVEL_11_0, D3D_FEATURE_LEVEL_10_1,
      D3D_FEATURE_LEVEL_10_0, D3D_FEATURE_LEVEL_9_3,  D3D_FEATURE_LEVEL_9_2,
      D3D_FEATURE_LEVEL_9_1};

  Microsoft::WRL::ComPtr<ID3D11DeviceContext> d3d11_device_context;

  ThrowIfFailed(D3D11CreateDevice(
      nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, creation_flags,
      feature_levels, ARRAYSIZE(feature_levels), D3D11_SDK_VERSION,
      &d3d11_device_, nullptr, &d3d11_device_context));

  Microsoft::WRL::ComPtr<IDXGIDevice> dxgi_device;
  ThrowIfFailed(d3d11_device_->QueryInterface(dxgi_device.GetAddressOf()));

  ThrowIfFailed(D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED,
                                  IID_PPV_ARGS(&d2d1_factory_)));

  Microsoft::WRL::ComPtr<ID2D1Device> d2d1_device;

  ThrowIfFailed(d2d1_factory_->CreateDevice(dxgi_device.Get(), &d2d1_device));

  ThrowIfFailed(d2d1_device->CreateDeviceContext(
      D2D1_DEVICE_CONTEXT_OPTIONS_NONE, &d2d1_device_context_));

  // Identify the physical adapter (GPU or card) this device is runs on.
  Microsoft::WRL::ComPtr<IDXGIAdapter> dxgi_adapter;
  ThrowIfFailed(dxgi_device->GetAdapter(&dxgi_adapter));

  // Get the factory object that created the DXGI device.
  ThrowIfFailed(dxgi_adapter->GetParent(IID_PPV_ARGS(&dxgi_factory_)));

  ThrowIfFailed(DWriteCreateFactory(
      DWRITE_FACTORY_TYPE_SHARED, __uuidof(IDWriteFactory),
      reinterpret_cast<IUnknown**>(dwrite_factory_.GetAddressOf())));

  ThrowIfFailed(dwrite_factory_->GetSystemFontCollection(
      &dwrite_system_font_collection_));

  graph_factory_.reset(new WinGraphFactory(this));
}
}  // namespace cru::win::graph