/*  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_HPP
#define FEDIPOTATO_HPP

#include "account_mastodon.hpp"
#include "config.hpp"
#include "version.hpp"

#include <optional>
#include <string>
#include <string_view>

namespace FediPotato
{

using std::string;
using std::string_view;

/*!
 *  @brief  High-level interface to fediverse accounts and their data.
 *
 *  For possible exceptions see Directories, Config and MastodonAPI.
 *
 *  @since  0.1.0
 *
 *  @headerfile fedipotato.hpp FediPotato/fedipotato.hpp
 */
class FediPotato
{
public:
    /*!
     *  @brief  Construct a FediPotato object.
     *
     *  @param  application_name The name of your application. Influences the
     *                           file paths for all the data that is stored.
     *
     *  @since  0.1.0
     */
    explicit FediPotato(const string_view application_name)
        : _application_name{application_name}
        , _config{application_name, "general.json"}
    {
        MastodonAPI test{account_mastodon("test")};
        test.start_stream(MastodonAPI::stream_type::home_tl, std::nullopt);
        test.stop_stream(MastodonAPI::stream_type::home_tl, std::nullopt);
    }

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

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

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

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

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

public:
    /*!
     *  @brief  Return the version of the library.
     *
     *  @since  0.1.0
     */
    inline static constexpr string_view get_version()
    {
        return version;
    }

    /*!
     *  @brief  Set the proxy server.
     *
     *  Example:
     *  @code
     *  FediPotato account("example");
     *  account.set_proxy("socks4a://user:password@localhost:9050");
     *  @endcode
     *
     *  @param  proxy curl-compatible proxy string. See [CURLOPT_PROXY(3)]
     *                (https://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html).
     *
     *  @since  0.1.0
     */
    void set_proxy(const string_view proxy)
    {
        _config.set("proxy", proxy);
    }

    /*!
     *  @brief  Connect to an account using the Mastodon API.
     *
     *  @param  account_name Identifier for the account.
     *
     *  @since  0.1.0
     */
    [[nodiscard]]
    MastodonAPI account_mastodon(const string_view account_name) const
    {
        return MastodonAPI(_application_name, account_name, _config);
    }

private:
    const string _application_name;
    Config _config;
};

} // namespace FediPotato

#endif  // FEDIPOTATO_HPP

/*!
 *  @mainpage FediPotato Reference
 *
 *  @section using Using the library
 *
 *  Include fedipotato.hpp, which then includes all other headers.
 *
 *  @code
 *  #include <FediPotato/fedipotato.hpp>
 *  @endcode
 *
 *  Use it in your CMake project like this:
 *
 *  @code
 *  find_package(FediPotato REQUIRED CONFIG)
 *  target_link_libraries(MyProject PRIVATE FediPotato::FediPotato)
 *  @endcode
 *
 *  Or compile your code with `g++ $(pkg-config --cflags --libs FediPotato)`.
 *
 *  Since we use C++17 features in the headers of this library, your program
 *  needs to be compiled as C++17 or higher too.
 *
 *  @subsection example Example
 *
 *  @code
 *  #include <FediPotato/fedipotato.hpp>
 *
 *  int main()
 *  {
 *  }
 *  @endcode
 *
 *  @section exceptions Exceptions
 *
 *  We throw exceptions. Consult the class descriptions for more information.
 *
 *  @section thread_safety Thread safety
 *
 *  The first time you construct a MastodonAPI, [curl_global_init(3)]
 *  (https://curl.haxx.se/libcurl/c/curl_global_init.html) is called. When the
 *  last MastodonAPI is destroyed, [curl_global_cleanup(3)]
 *  (https://curl.haxx.se/libcurl/c/curl_global_cleanup.html) is called. Both
 *  are not thread safe.
 *
 *  If you are using libcurl with OpenSSL before 1.1.0, please read
 *  [libcurl-thread(3)](https://curl.haxx.se/libcurl/c/threadsafe.html).
 */