#ifndef SMARTHANDLE_H
#define SMARTHANDLE_H

/**
 * Smart handle is like a smart pointer. It simply deletes the object on destruction using a custom deleter
 * It differs from `std::unique_ptr` by that it doesn't expect a pointer
 */
template <typename T, typename Deleter>
class SmartHandle
{
public:
    typedef T value_type;
    typedef Deleter deleter_function;
private:
    T _value;
    Deleter _deleter;
    bool _doDelete;
    void _delete();
public:
    SmartHandle();
    SmartHandle(T value, Deleter deleter);
    SmartHandle(const SmartHandle& orig) = delete;
    SmartHandle& operator=(const SmartHandle& orig) = delete;
    SmartHandle(SmartHandle&& src);
    ~SmartHandle();
    T get() const;
    void reset();
    void reset(T value, Deleter deleter);
};

template <typename T, typename Deleter>
SmartHandle<T,Deleter>::SmartHandle()
{
    this->_doDelete = 0;
}

template <typename T, typename Deleter>
SmartHandle<T,Deleter>::SmartHandle(T value, Deleter deleter)
{
    this->_doDelete = 0;
    this->reset(value,deleter);
}

template<typename T, typename Deleter>
SmartHandle<T,Deleter>::SmartHandle(SmartHandle&& src)
{
    this->reset(src._value,src._deleter);
    src._doDelete = 0;
}

template <typename T, typename Deleter>
void SmartHandle<T,Deleter>::reset(T value, Deleter deleter)
{
    if(this->_doDelete) {
        this->_delete();
    }
    this->_value   = value;
    this->_deleter = deleter;
    this->_doDelete = 1;
}

template <typename T, typename Deleter>
void SmartHandle<T,Deleter>::reset()
{
    if(this->_doDelete) {
        this->_delete();
    }
}

template <typename T, typename Deleter>
T SmartHandle<T,Deleter>::get() const
{
    return _value;
}

template <typename T, typename Deleter>
void SmartHandle<T,Deleter>::_delete()
{
    _deleter(_value);
    this->_doDelete = 0;
}

template <typename T, typename Deleter>
SmartHandle<T,Deleter>::~SmartHandle()
{
    if(this->_doDelete) {
        _delete();
    }
}

#endif // SMARTHANDLE_H