/*******************************************************************************
 **
 ** nyamp: yet another media player
 ** Copyright (C) 2017  Aqua-sama
 **
 ** 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 3 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 <http://www.gnu.org/licenses/>.
 **
 ******************************************************************************/

#ifndef CONFIGURATION_H
#define CONFIGURATION_H

#include <optional>
#include <vector>

namespace libconfig {
class Config;
class Setting;
}

class Configuration
{
public:
    Configuration();
    ~Configuration();

    bool readUserConfiguration(const std::string &path);
    bool writeUserConfiguration(const std::string &path);

    bool readDefaultConfiguration(const std::string &data);

    std::vector<std::string> childrenSettings(const char *name = "");
    std::vector<std::string> childrenGroups(const char *name = "");

    template<typename T>
    std::optional<T> value(const char* path) const;

    template<typename T>
    void setValue(std::string path, const T &val);

private:
    libconfig::Config* getConfig(const char* path) const;

    std::string m_userCfgPath;
    libconfig::Config *m_userCfg;
    libconfig::Config *m_defaultCfg;
};

// replace ~ with home
std::string& patchHome(std::string &path, const std::string &home);

// instantiate functions
// this needs to be done because the implementation is in the cpp file

// Settings::value<>
extern template std::optional<int> Configuration::value<int>(const char* path) const;
extern template std::optional<unsigned int> Configuration::value<unsigned int>(const char* path) const;
extern template std::optional<long> Configuration::value<long>(const char* path) const;
extern template std::optional<unsigned long> Configuration::value<unsigned long>(const char* path) const;

extern template std::optional<long long> Configuration::value<long long>(const char* path) const;
extern template std::optional<unsigned long long> Configuration::value<unsigned long long>(const char* path) const;

extern template std::optional<float> Configuration::value<float>(const char* path) const;
extern template std::optional<double> Configuration::value<double>(const char* path) const;

extern template std::optional<bool> Configuration::value<bool>(const char* path) const;

extern template std::optional<std::string> Configuration::value<std::string>(const char* path) const;

// Settings::setValue<>
extern template void Configuration::setValue<int>(std::string path, const int &val);
extern template void Configuration::setValue<unsigned int>(std::string path, const unsigned int &val);
extern template void Configuration::setValue<long>(std::string path, const long &val);
extern template void Configuration::setValue<unsigned long>(std::string path, const unsigned long &val);

extern template void Configuration::setValue<long long>(std::string path, const long long &val);
extern template void Configuration::setValue<unsigned long long>(std::string path, const unsigned long long &val);

extern template void Configuration::setValue<float>(std::string path, const float &val);
extern template void Configuration::setValue<double>(std::string path, const double &val);

extern template void Configuration::setValue<bool>(std::string path, const bool &val);

extern template void Configuration::setValue<std::string>(std::string path, const std::string &val);

#endif // CONFIGURATION_H