// Copyright 2023 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include "VideoCommon/Assets/TextureAsset.h"

#include "Common/Logging/Log.h"

namespace VideoCommon
{
CustomAssetLibrary::LoadInfo RawTextureAsset::LoadImpl(const CustomAssetLibrary::AssetID& asset_id)
{
  auto potential_data = std::make_shared<CustomTextureData>();
  const auto loaded_info = m_owning_library->LoadTexture(asset_id, potential_data.get());
  if (loaded_info.m_bytes_loaded == 0)
    return {};
  {
    std::lock_guard lk(m_data_lock);
    m_loaded = true;
    m_data = std::move(potential_data);
  }
  return loaded_info;
}

CustomAssetLibrary::LoadInfo GameTextureAsset::LoadImpl(const CustomAssetLibrary::AssetID& asset_id)
{
  auto potential_data = std::make_shared<CustomTextureData>();
  const auto loaded_info = m_owning_library->LoadGameTexture(asset_id, potential_data.get());
  if (loaded_info.m_bytes_loaded == 0)
    return {};
  {
    std::lock_guard lk(m_data_lock);
    m_loaded = true;
    m_data = std::move(potential_data);
  }
  return loaded_info;
}

bool GameTextureAsset::Validate(u32 native_width, u32 native_height) const
{
  std::lock_guard lk(m_data_lock);

  if (!m_loaded)
  {
    ERROR_LOG_FMT(VIDEO,
                  "Game texture can't be validated for asset '{}' because it is not loaded yet.",
                  GetAssetId());
    return false;
  }

  if (m_data->m_levels.empty())
  {
    ERROR_LOG_FMT(VIDEO,
                  "Game texture can't be validated for asset '{}' because no data was available.",
                  GetAssetId());
    return false;
  }

  // Verify that the aspect ratio of the texture hasn't changed, as this could have
  // side-effects.
  const VideoCommon::CustomTextureData::Level& first_mip = m_data->m_levels[0];
  if (first_mip.width * native_height != first_mip.height * native_width)
  {
    ERROR_LOG_FMT(
        VIDEO,
        "Invalid custom texture size {}x{} for game texture asset '{}'. The aspect differs "
        "from the native size {}x{}.",
        first_mip.width, first_mip.height, GetAssetId(), native_width, native_height);
    return false;
  }

  // Same deal if the custom texture isn't a multiple of the native size.
  if (native_width != 0 && native_height != 0 &&
      (first_mip.width % native_width || first_mip.height % native_height))
  {
    ERROR_LOG_FMT(
        VIDEO,
        "Invalid custom texture size {}x{} for game texture asset '{}'. Please use an integer "
        "upscaling factor based on the native size {}x{}.",
        first_mip.width, first_mip.height, GetAssetId(), native_width, native_height);
    return false;
  }

  return true;
}
}  // namespace VideoCommon
