/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2019                                                               *
 *                                                                                       *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
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 * or substantial portions of the Software.                                              *
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#ifndef __OPENSPACE_MODULE_FIELDLINESSEQUENCE___WEBFIELDLINESMANAGER___H__
#define __OPENSPACE_MODULE_FIELDLINESSEQUENCE___WEBFIELDLINESMANAGER___H__

#include <vector>
#include <string>

namespace openspace {
    
class WebFieldlinesManager{
public:
    WebFieldlinesManager();
    WebFieldlinesManager(std::string syncDir);

    
    // For testing purposes
    void downloadFieldlines(std::vector<std::string>& _sourceFile, std::vector<double>& _startTimes, size_t& _nStates);


    
private:
    // for now, it's the same as user entered i asset-file
    std::string _syncDir;
    
    std::string _flsTypeString;
    
    int _downloadMargin;
    
    // List of all triggertimes(field lines states) available for download
    std::vector<std::pair<double, std::string>> _availableTriggertimes;
    
    // Indices for what fieldlines to download
    std::vector<int> _filesToDownload;
    
    // Function to run in FieldLinesSequence's update loop
    void update();
    
    // Download one file, given what model type and triggertime in J2000
    // ***turn into ints later***
    std::string downloadOsfls(std::string triggertime);
    
    // Get list of all triggertimes(field lines states) available form the server
    void getAvailableTriggertimes();
    
    // Decide what the first sequence of fieldlines should be
    // (can be empty during start up of openspace)
    void setInitialSet(double openSpaceTime);
    
    // Download a sequence
    void downloadInitialSequence(std::vector<double> triggertimes);
    
    // Update the list of osfls available on disk. Should be in sync with
    // _startTimes member var in FieldLinesSequence
    void updateStartTimes();
    
    // Parse the data from http request
    void parseTriggerTimesList(std::string s);
    
    // some temporary functions to translate the filenames to ints
    int triggerTimeString2Int(std::string s);
    void triggerTimeInt2String(int d, std::string& s);
    
};


} // namespace openspace

#endif // __OPENSPACE_MODULE_FIELDLINESSEQUENCE___WEBFIELDLINESMANAGER___H__