#ifndef VARIABLE_H
#define VARIABLE_H

#include <stdint.h>

#include <bu/string.h>
#include <bu/hash.h>

#include "enums.h"

class VariableRef
{
public:
	ScopeId sid;
	Bu::String sName;

	bool operator==( const VariableRef &rhs ) const;
};

class Variable
{
friend uint32_t Bu::__calcHashCode<Variable>( const Variable &k );
friend Bu::Formatter &operator<<( Bu::Formatter &f, const Variable &v );
public:
	enum Type
	{
		tNull,
		tBool,
		tInt,
		tFloat,
		tSituation,
		tVariable,
		tVarPtr,
		tList,
		tDictionary,
		tString,
	};

public:
	Variable();
	Variable( const Variable &src );
	Variable( Type eType );
	Variable( int64_t iValue );
	Variable( double fValue );
	Variable( bool bValue );
	Variable( const Bu::String &sValue );
	Variable( Variable *pValue );
	virtual ~Variable();

	static Variable newSituationName( const Bu::String &s );
	static Variable newVariableName( const Bu::String &s, ScopeId sid );

	Type getType() const { return eType; }
	
	typedef Bu::List<Variable> VariableList;
	typedef Bu::Hash<Variable, Variable> VariableHash;

	bool getBool() const;
	int64_t getInt() const;
	double getFloat() const;
	Bu::String getString() const;
	VariableRef getVariableRef() const;
	Variable *getVariablePtr() const;
	const VariableList &getList() const;
	const VariableHash &getHash() const;

	Variable to( Type e ) const;

	void insert( const Variable &vKey, const Variable &vValue );
	bool has( const Variable &vKey );
	Variable &get( const Variable &vKey );

	Variable &operator=( const Variable &rhs );
	Variable &operator+=( const Variable &rhs );
	Variable &operator-=( const Variable &rhs );
	Variable &operator*=( const Variable &rhs );
	Variable &operator/=( const Variable &rhs );
	Variable operator+( const Variable &rhs ) const;
	Variable operator-( const Variable &rhs ) const;
	Variable operator*( const Variable &rhs ) const;
	Variable operator/( const Variable &rhs ) const;
	Variable operator-() const;
	bool operator==( const Variable &rhs ) const;
	bool operator!=( const Variable &rhs ) const;
	bool operator>( const Variable &rhs ) const;
	bool operator<( const Variable &rhs ) const;
	bool operator>=( const Variable &rhs ) const;
	bool operator<=( const Variable &rhs ) const;

private:
	void initType();
	void deinitType();
	Type bestType( Type t1, Type t2 ) const;

private:
	Type eType;

	union
	{
		int64_t iValue;
		double fValue;
		bool bValue;
		Bu::String *sValue;
		VariableList *lValue;
		VariableHash *hValue;
		VariableRef *rValue;
		Variable *pValue;
	};
};

namespace Bu
{
	template<> uint32_t __calcHashCode<Variable>( const Variable &k );
	template<> bool __cmpHashKeys<Variable>( const Variable &a, const Variable &b );
};

Bu::Formatter &operator<<( Bu::Formatter &f, const Variable &v );

typedef Bu::List<Variable> VariableList;
typedef Bu::Hash<Bu::String, Variable> VariableHash;

#endif