/*
....[@@@..[@@@..............[@.................. MUD++ is a written from
....[@..[@..[@..[@..[@..[@@@@@....[@......[@.... scratch multi-user swords and
....[@..[@..[@..[@..[@..[@..[@..[@@@@@..[@@@@@.. sorcery game written in C++.
....[@......[@..[@..[@..[@..[@....[@......[@.... This server is an ongoing
....[@......[@..[@@@@@..[@@@@@.................. development project.  All 
................................................ contributions are welcome. 
....Copyright(C).1995.Melvin.Smith.............. Enjoy. 
------------------------------------------------------------------------------
Melvin Smith (aka Fusion)         msmith@hom.net
MUD++ development mailing list    mudpp@van.ml.org
------------------------------------------------------------------------------
properties.h
*/

#ifndef _PROPERTIES_H
#define _PROPERTIES_H

#include <assert.h>
#include "nameable.h"
#include "streamable.h"
#include "io.h"
#include "hash.h"

//#define NDEBUG

enum property_type
{
	PROP_UNKNOWN =0,
	PROP_INT, PROP_BOOL, PROP_STRING
};

#define DEFAULT_PROPERTIES_FILE "../etc/mudpp.pro"

class Property;


typedef union
{
	int i;
	bool b;
	String * s;
} prop_val;

typedef const char * (*notifyFun) (const Property *);

class Property : public Nameable, virtual public Streamable
{
	private:
		property_type type;
		prop_val value;
		notifyFun nfun;
		bool runtime;

	public:
		Property() :
			type(PROP_UNKNOWN), nfun(0), runtime(true)
		{
			value.s = 0;
		}

		~Property() 
		{
			if ( (type == PROP_STRING) && (value.s) )
				delete value.s;
		}

		Property & operator= ( const Property & );

		int readFrom( StaticInput & );
		int writeTo( Output &) const;
		const char * asText() const;

		property_type getType() const { return type; };
		const char * getTypeName() const;
		void setType( property_type t ) { type = t; }
		notifyFun getFun() const { return nfun; }
		void setFun( notifyFun f ) { nfun = f; }
		const char * notify() const { return (nfun ? (*nfun)(this) : 0); }
		const char * parseValue( const char * );
		const char * parseValue( const String & str ) { return parseValue(str.chars()); }
		void setRuntime( bool n ) { runtime = n ;}
		bool getRuntime() const { return runtime; }
		prop_val getValue() const { return value; }
		int getInt() const { return value.i; }
		bool getBool() const { return value.b; }
		const String & getString() const { return *(value.s); }
};

extern HashTable< Property > properties;

void lookup_property( Property ** holder, const char * name, 
						property_type type, const char * defl,
						notifyFun fun , bool runtime);

// See doc/properties.doc for useage hints

inline void UseProperty( Property ** holder, const char * name, 
						property_type type, const char * defl,
						notifyFun fun = NULL, bool runtime = true )
{
	if ( *holder )
	{
		assert( (*holder)->getName() == name );
		assert( (*holder)->getType() == type );
		assert( (*holder)->getFun() == fun );
		return;
	}
	else
		lookup_property( holder, name, type, defl, fun, runtime);
}

void loadProperties( StaticInput &, String & );
void saveProperties( Output & );

const char * nf_gtz( const Property *);
const char * nf_gez( const Property *);

#endif