/**
 * Looking Glass
 * Copyright © 2017-2026 The Looking Glass Authors
 * https://looking-glass.io
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#pragma once

#include <optional>
#include <vector>
#include <string>
#include <windows.h>

struct DisplayMode {
  unsigned width;
  unsigned height;
  unsigned refresh100uHz;
  bool     preferred;

  std::wstring toString();
};

class CRegistrySettings {
  HKEY hKey;

  std::optional<bool> readBooleanSetting(LPCWSTR szName, bool fallback = false);
  LSTATUS writeBooleanSetting(LPCWSTR szName, bool value);

public:
  CRegistrySettings();
  ~CRegistrySettings();

  LSTATUS open(bool writable = false);
  bool isOpen() { return !!hKey; }

  std::vector<DisplayMode> getDefaultModes();
  std::optional<std::vector<DisplayMode>> getModes();
  LSTATUS setModes(const std::vector<DisplayMode> &modes);

  std::optional<DWORD> getDefaultRefresh();
  LSTATUS setDefaultRefresh(DWORD refresh100uHz);

  std::optional<bool> getNoGPU();
  LSTATUS setNoGPU(bool noGPU);

  std::optional<bool> getExclusiveMonitor();
  LSTATUS setExclusiveMonitor(bool exclusive);

  std::optional<bool> getForceFullDirectCopy();
  LSTATUS setForceFullDirectCopy(bool forceFullCopy);

  std::optional<bool> getForceIndirectCopy();
  LSTATUS setForceIndirectCopy(bool forceIndirectCopy);
};
