//
//  DemoAndLicensing.h
//
//  Created by Andrew Salamon on 12/6/07.
//  Copyright 2007 Machine Perception Laboratory, University of California San Diego. All rights reserved.
//

#ifndef __DEMOANDLICENSING_H__
#define __DEMOANDLICENSING_H__

#include <string>
#include <vector>

#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/date_time/gregorian/gregorian.hpp>

namespace bg = boost::gregorian;

namespace CERT
{

class DemoAndLicensing
{
public:
    static DemoAndLicensing *sharedDemo();

    DemoAndLicensing();
    virtual ~DemoAndLicensing();

    bool isDemo(); ///< Returns yes if we have a startDate or can read one from a file.
    bool hasDemoEnded();
    bool startDemo(); ///< Write the current date to a file to start counting the demo period. Returns false if we can't write the file.

    virtual void notifyUserDemoEnded();
    virtual void notifyUserDemoNotAllowed();
    virtual void notifyUserDemoLeft();

    std::string getFilename();
    void setFilename( const std::string &value );

    std::vector<std::string>  getAllowedPaths();
    void setAllowedPaths( const std::vector<std::string> &value );

    unsigned int getDemoLength(); ///< In days.
    void setDemoLength( unsigned int days );

    bg::date demoEndDate();
	bg::date demoStartDate();
	
    bool getStarted() { return started; }
    std::string getPathUsed() { return pathUsed; }

protected:
    void setStartFromTime( time_t startTime );
    bool validateStartDate( time_t startTime );

    virtual bool readDemoStartDate();
    virtual bool writeDemoStartDate();
    virtual bool writeDemoStartDate( time_t startTime );

    int obfuscate(int num);
    int deobfuscate(int num);

private:
	std::string filename;
	std::vector<std::string> allowedPaths;
	bg::days demoLength;

	bool started;
	bg::date startDate;

    std::string pathUsed; // Which path was last used to read and/or write from/to.
};

} // end namespace CERT
#endif // __DEMOANDLICENSING_H__