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#ifndef VARIABLES_H
#define VARIABLES_H

#include <boost/intrusive_ptr.hpp>
#include <boost/optional.hpp>
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include <stdint.h>
#include <glibmm/ustring.h>
#include <libxml++/nodes/element.h>
#include <libxml++/attribute.h>
#include "intrusivePtrBase.h"
#include <boost/variant.hpp>
#include <boost/shared_ptr.hpp>

class RowUser;
typedef boost::variant<
		// Strings
		Glib::ustring,
		boost::shared_ptr<const Glib::ustring>,
		// Numbers
		long long unsigned int,
		long unsigned int,
		unsigned int,
		short unsigned int,
		long long int,
		long int,
		int,
		short int,
		double,
		float,
		// DateTimes
		boost::posix_time::ptime,
		boost::shared_ptr<const boost::posix_time::ptime>
		> VariableType;

class VariableImpl : public virtual IntrusivePtrBase {
	public:
		virtual const VariableType & value() const = 0;

	protected:
		virtual ~VariableImpl() = 0;
};

class Variable {
	public:
		typedef boost::intrusive_ptr<VariableImpl> VariableImplPtr;

		Variable(const xmlpp::Element *, const Glib::ustring & n, bool required = true, VariableType def = VariableType());

		static Variable makeFromCode(const Glib::ustring & s);
		static Variable makeParent(const Glib::ustring & name, bool attr, unsigned int depth);

		operator const VariableType & () const { return var->value(); }
		const VariableType & operator()() const { return var->value(); }

	private:
		Variable(VariableImpl *);
		friend class VariableParse;
		static VariableImplPtr create(const Glib::ustring & s, RowUser * dep = NULL);
		VariableImplPtr var;
};

#endif