/*
 * Author: Harry van Haaren 2013
 *         harryhaaren@gmail.com
 * 
 *  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 LUPPP_DISK_READER_H
#define LUPPP_DISK_READER_H

#include <string>

#include "cjson/cJSON.h"

class AudioBuffer;

/** DiskReader
 * This class reads a previously saved session from disk, restoring Luppp's
 * internal state to that of when the save took place.
 * 
 * The directory <sessionDir> is the main point of loading. The user selects 
 * that directory to load the session from. <sessionDir>.luppp is the name of
 * the session file: it contains all info about the session: Volumes, loaded
 * samples etc.
 * 
 * Samples are read from the directory <sessionDir>/samples, in which there is a
 * sample.cfg file, which can be parsed to get sample metadata.
**/
class DiskReader
{
  public:
    DiskReader();
    
    /// loads default settings for Luppp: controller instances etc
    int loadPreferences();
    
    /// loads a sample into a new AudioBuffer, returning the buffer
    int loadSample( int track, int scene, std::string path );
    std::string getLastLoadedSamplePath();
    
    /// reads a session from disk, parsing and restoring state
    int readSession( std::string path );
    
#ifdef BUILD_TESTS
    int runTests();
#endif
  
  private:
    cJSON* sessionJson;
    
    std::string sessionName;
    std::string sessionPath;
    
    // convinience functions
    int readTracks();
    int readMaster();
    int readScenes(int t, cJSON* track);
    
    // ui show editor
    int showAudioEditor(AudioBuffer* );
    
    // sample load dialog
    std::string lastLoadedSamplePath;
};

#endif // LUPPP_DISK_READER_H