/*

 * Hedgewars, a free turn based strategy game

 *

 * 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; version 2 of the License

 *

 * 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, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 */

/**

 * @file

 * @brief SDLInteraction class definition

 */

#ifndef HEDGEWARS_SDLINTERACTION_H

#define HEDGEWARS_SDLINTERACTION_H

#include <QMap>

#include <QStringList>

#include "SDL_mixer.h"

/**

 * @brief Class for interacting with SDL (used for music and keys)

 *

 * @see <a href="http://en.wikipedia.org/wiki/Singleton_pattern">singleton pattern</a>

 */

class SDLInteraction

{

    private:

        /**

         * @brief Class constructor of the <i>singleton</i>.

         *

         * Not to be used from outside the class,

         * use the static {@link DataManager::instance()} instead.

         *

         * @see <a href="http://en.wikipedia.org/wiki/Singleton_pattern">singleton pattern</a>

         */

        SDLInteraction();

        /// Initializes SDL for sound output if needed.

        void SDLAudioInit();

        bool m_audioInitialized; ///< true if audio is initialized already

        Mix_Music * m_music; ///< pointer to the music channel of the mixer

        QString m_musicTrack; ///< path to the music track;

        bool m_isPlayingMusic; ///< true if music was started but not stopped again.

        QMap<QString,Mix_Chunk*> * m_soundMap; ///< maps sound file paths to channels

        int lastchannel; ///< channel of the last music played

    public:

        /**

         * @brief Returns reference to the <i>singleton</i> instance of this class.

         *

         * @see <a href="http://en.wikipedia.org/wiki/Singleton_pattern">singleton pattern</a>

         *

         * @return reference to the instance.

         */

        static SDLInteraction & instance();

        /// Class Destructor.

        ~SDLInteraction();

        /**

         * @brief Returns available (screen) resolutions.

         *

         * @return list of resolutions in the format WIDTHxHEIGHT.

         */

        QStringList getResolutions() const;

        /// Adds all available joystick controlls to the list of SDL keys.

        void addGameControllerKeys() const;

        /**

         * @brief Plays a sound file.

         *

         * @param soundFile path of the sound file.

         */

        void playSoundFile(const QString & soundFile);

        /**

         * @brief Sets the music track to be played (or not).

         *

         * @param musicFile path of the music file.

         */

        void setMusicTrack(const QString & musicFile);

        /// Starts the background music if not already playing.

        void startMusic();

        /// Fades out and stops the background music (if playing).

        void stopMusic();

};

#endif //HEDGEWARS_SDLINTERACTION_H