#ifndef ACTIVATION_CODE_H
#define ACTIVATION_CODE_H


#include "singleton.h"
#include <string>

class ActivationCode : public Singleton<ActivationCode>
{
public:
    const std::string & eigen_value() const;
    const std::string & activation_code_lhs() const;

public:
    bool check(const std::string & terminal_number);
    bool store(const std::string & terminal_number, const std::string & activation_code);

public:
    void calc(
        const std::string & terminal_number, 
        const std::string & eigen_value, 
        std::string & activation_code
    );
    void calc(
         const std::string & terminal_number, 
         const std::string & eigen_value,
         std::string & activation_code,
		const int & days_to_live
     );
    int get_life(const std::string& activation_code);

private:
    ActivationCode();
    ~ActivationCode();

private:
    ActivationCode(const ActivationCode &);
    ActivationCode & operator = (const ActivationCode &);

private:
    friend class Singleton<ActivationCode>;

private:
    std::string  m_eigen_value;
    std::string  m_activation_code_lhs;
};


#endif // ACTIVATION_CODE_H