/*  This file is part of FediPotato.
 *  Copyright © 2020 tastytea <tastytea@tastytea.de>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef FEDIPOTATO_CONFIG_HPP
#define FEDIPOTATO_CONFIG_HPP

#include <nlohmann/json.hpp>

#if __has_include(<filesystem>)
#    include <filesystem>
#else
#    include <experimental/filesystem>
#endif
#include <string>
#include <string_view>

namespace FediPotato
{

using json = nlohmann::json;
namespace fs = std::filesystem;
using std::string;
using std::string_view;

/*!
 *  @brief  Read and write the configuration.
 *
 *  @since  0.1.0
 *
 *  @headerfile config.hpp FediPotato/config.hpp
 */
class Config
{
public:
    /*!
     *  @brief  Construct a Config object.
     *
     *  @param  application_name The name of your application.
     *  @param  filename         The filename to open.
     *
     *  @since  0.1.0
     */
    explicit Config(string_view application_name, string_view filename);

    //! Copy constructor
    Config(const Config &other) = default;

    //! Move constructor
    Config(Config &&other) noexcept = default;

    //! Destructor
    virtual ~Config() noexcept = default;

    //! Copy assignment operator
    Config& operator=(const Config &other) = delete;

    //! Move assignment operator
    Config& operator=(Config &&other) noexcept = delete;

public:
    /*!
     *  @brief  Read and parse the configuration file.
     *
     *  @since  0.1.0
     */
    void read();

    /*!
     *  @brief  Set a configuration setting.
     *
     *  @param  key   The key of the setting.
     *  @param  value The value of the setting.
     *
     *  @since  0.1.0
     */
    void set(string_view key, string_view value);

private:
    const string _filename;
    const fs::path _filepath;
    json _configfile;
};

} // namespace FediPotato

#endif  // FEDIPOTATO_CONFIG_HPP