AppConfig.h

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/*$!{
* Aurora Clang AST Viewer (ACAV)
* 
* Copyright (c) 2026 Min Liu
* Copyright (c) 2026 Michael David Adams
* 
* SPDX-License-Identifier: GPL-2.0-or-later
* 
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* 
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
* 
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <https://www.gnu.org/licenses/>.
}$!*/

#pragma once
 
#include <QDir>
#include <QSettings>
#include <QString>
 
namespace acav {

class AppConfig {
public:
  static void initialize(const QString &configFilePath = QString());

  static AppConfig &instance();

  QString getConfigFilePath() const;

  bool reload();

  QString getCacheDirectory(const QString &compilationDatabasePath) const;

  QString getDependenciesFilePath(const QString &compilationDatabasePath) const;

  QString getAstCacheDirectory(const QString &compilationDatabasePath) const;

  QString getAstFilePath(const QString &compilationDatabasePath,
                         const QString &sourceFilePath) const;

  QString getMetadataFilePath(const QString &compilationDatabasePath) const;

  QString getBuildDirectory(const QString &compilationDatabasePath) const;

  bool getCommentExtractionEnabled() const;

  bool getMemoryProfilingEnabled() const;

  QString getCacheRoot() const;

  int getFontSize() const;

  QString getFontFamily() const;

  int getParallelProcessorCount() const;
 
private:
  AppConfig(const QString &configFilePath);
  ~AppConfig() = default;
 
  // Prevent copying
  AppConfig(const AppConfig &) = delete;
  AppConfig &operator=(const AppConfig &) = delete;

  static void createDefaultConfigFile(const QString &path);

  static QString getDefaultConfigPath();
 
  static AppConfig *instance_;
  
  QString configFilePath_;
  QSettings settings_;
  QString cacheRoot_;
  bool commentExtractionEnabled_ = true;
  bool memoryProfilingEnabled_ = false;
  int fontSize_ = 11;
  QString fontFamily_;
  int parallelProcessorCount_ = 0;  // 0 = auto-detect
 
  void loadSettings();
  QString hashPath(const QString &path) const;
  void ensureCacheDirectory(const QString &compilationDatabasePath) const;
};
 
} // namespace acav