#ifndef GAME_STATE_H
#define GAME_STATE_H

#include "astbranch.h"
#include "variable.h"
#include "scope.h"
#include "enums.h"

class Game;
class Interface;

namespace Gats
{
	class Object;
	class Dictionary;
	class List;
}

class GameState
{
public:
	GameState( Game *pGame, Interface *pIface );
	virtual ~GameState();

	Gats::Dictionary *toGats() const;
	void fromGats( Gats::Dictionary *pRoot );

	Interface *getInterface() { return pIface; }

	void run( const class AstBranch *pAst, bool bNewScope );
	void run( const AstBranch::NodeList &lNode, bool bNewScope );
	//void pushScope( class AstBranch *pAst );

	void init();

	void gotoSituation( const Bu::String &sName );

	Variable pop() { return lStack.peekPop(); }
	Variable popDeref();
	void push( const Variable &v ) { lStack.push( v ); }

	void callFunction( const Bu::String &sName );
	void execCommand( const Bu::String &sCmd );
	void execOption( int idx );

	bool hasVariable( const Bu::String &sName, ScopeId id );
	void delVariable( const Bu::String &sName, ScopeId id );
	Variable &getVariable( const Bu::String &sName, ScopeId id=sidLocal );
	void setVariable( const Bu::String &sName, const Variable &v, ScopeId id=sidLocal );

	Variable &deref( Variable &src, bool bCreate=false );
	Bu::StringList tokenize( const Bu::String &sSrc );

	void exit();
	bool isRunning() const { return bRunning; }
	Bu::String getPrompt() const { return sPrompt; }

	class Situation *getCurSituation();

private:
	Gats::Object *scopeToGats( const Scope *pSrc ) const;
	Gats::Object *variableToGats( const Variable &rVar ) const;
	void gatsToScope( Gats::Dictionary *pRoot, Scope *pSrc ) const;
	Variable gatsToVariable( Gats::List *pLst ) const;

private:
	typedef Bu::List<Scope *> ScopeList;
	typedef Bu::Hash<Bu::String, Scope *> ScopeHash;
	Game *pGame;
	Interface *pIface;
	Scope sGlobal;
	Scope sPlayer;
	ScopeList lsLocal;
	ScopeHash hsSituation;
	Bu::String sCurSituation;

	bool bEscape;
	bool bRunning;
	bool bReturnOnly;
	Bu::String sPrompt;

	VariableList lStack;

	typedef AstBranch::NodeList::const_iterator ProgramCounter;
	typedef Bu::List<ProgramCounter> ProgramStack;

	Bu::String sGoto;
};

#endif