/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003-2006 The ScummVM project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#ifndef SWORD1_RESMAN_H
#define SWORD1_RESMAN_H

#include "sword1/memman.h"
#include "common/file.h"
#include "sword1/sworddefs.h"
#include "common/endian.h"

namespace Sword1 {

#define MAX_LABEL_SIZE (31+1)

#if defined(__PSP__)
#define MAX_OPEN_CLUS 4	// the PSP can't have more than 8 files open simultaneously
			// since we also need filehandles for music and sometimes savegames
			// set the maximum number of open clusters to 4.
#else
#define MAX_OPEN_CLUS 8	// don't open more than 8 files at once
#endif

struct Grp {
	uint32 noRes;
	MemHandle *resHandle;
	uint32 *offset;
	uint32 *length;
};

struct Clu {
	uint32 refCount;
	Common::File *file;
	char label[MAX_LABEL_SIZE];
	uint32 noGrp;
	Grp *grp;
	Clu *nextOpen;
};

struct Prj {
	uint32 noClu;
	Clu *clu;
};

class ResMan {
public:
	ResMan(const char *fileName, bool isMacFile);
	~ResMan(void);
	void flush(void);
	void resClose(uint32 id);
	void resOpen(uint32 id);
	void *fetchRes(uint32 id);
	void dumpRes(uint32 id);
	void *openFetchRes(uint32 id);
	void *cptResOpen(uint32 id);
	Header *lockScript(uint32 scrID);
	void unlockScript(uint32 scrID);
	FrameHeader *fetchFrame(void *resourceData, uint32 frameNo);
	
	uint16 getUint16(uint16 value) {
		return (_isBigEndian) ? FROM_BE_16(value): FROM_LE_16(value);
	}
	uint32 getUint32(uint32 value) {
		return (_isBigEndian) ? FROM_BE_32(value): FROM_LE_32(value);
	}
	uint16 getLEUint16(uint16 value) {
		return FROM_LE_16(value);
	}
	uint32 getLEUint32(uint32 value) {
		return FROM_LE_32(value);
	}
	uint16 readUint16(const void *ptr) {
		return (_isBigEndian) ? READ_BE_UINT16(ptr): READ_LE_UINT16(ptr);
	}
	uint32 readUint32(const void *ptr) {
		return (_isBigEndian) ? READ_BE_UINT32(ptr):READ_LE_UINT32(ptr);
	}
	uint32 readLEUint32(const void *ptr) {
		return READ_LE_UINT32(ptr);
	}
	uint16 toUint16(uint16 value) {
		return (_isBigEndian) ? TO_BE_16(value): TO_LE_16(value);
	}
	uint32 toUint32(uint32 value) {
		return (_isBigEndian) ? TO_BE_32(value): TO_LE_32(value);
	}


private:
	uint32	   resLength(uint32 id);
	MemHandle *resHandle(uint32 id);
	uint32     resOffset(uint32 id);
	Common::File      *resFile(uint32 id);

	void openCptResourceBigEndian(uint32 id);
	void openScriptResourceBigEndian(uint32 id);
	void openCptResourceLittleEndian(uint32 id);
	void openScriptResourceLittleEndian(uint32 id);

	void loadCluDescript(const char *fileName);
	void freeCluDescript(void);
	Prj _prj;
	MemMan *_memMan;
	static const uint32 _scriptList[TOTAL_SECTIONS];	//a table of resource tags
	static uint32 _srIdList[29];
	Clu *_openCluStart, *_openCluEnd;
	int  _openClus;
	bool _isBigEndian;
};

} // End of namespace Sword1

#endif //RESMAN_H