/*
 * This file is part of smolbote. It's copyrighted by the contributors recorded
 * in the version control history of the file, available from its original
 * location: git://neueland.iserlohn-fortress.net/smolbote.git
 *
 * SPDX-License-Identifier: GPL-3.0
 */

#ifndef CONFIGURATION_H
#define CONFIGURATION_H

#include <optional>
#include <string>
#include <vector>

namespace libconfig
{
class Config;
class Setting;
}

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

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

    bool parseDefaultConfiguration(const std::string &contents);

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

    void resetValue(const char *path);

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

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

private:
    bool changed = false;
    std::string m_userCfgPath;
    libconfig::Config *m_userCfg, *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 bool Configuration::setValue<int>(std::string path, const int &val);
extern template bool Configuration::setValue<unsigned int>(std::string path, const unsigned int &val);
extern template bool Configuration::setValue<long>(std::string path, const long &val);
extern template bool Configuration::setValue<unsigned long>(std::string path, const unsigned long &val);

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

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

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

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

#endif // CONFIGURATION_H