/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 SCI_ENGINE_MESSAGE_H
#define SCI_ENGINE_MESSAGE_H

#include "sci/scicore/resource.h"

namespace Sci {

struct MessageTuple {
	int noun;
	int verb;
	int cond;
	int seq;
};

struct IndexRecordCursor {
	byte *index_record;
	int index;
	byte *resource_beginning;
};

//typedef int index_record_size_t();
typedef void parse_index_record_t(IndexRecordCursor *index_record, MessageTuple *t);
typedef int get_talker_t(IndexRecordCursor *cursor);
typedef void get_text_t(IndexRecordCursor *cursor, char *buffer, int buffer_size);
typedef int index_record_count_t(byte *header);

struct MessageHandler {
	int version_id;
	parse_index_record_t *parse;
	get_talker_t *get_talker;
	get_text_t *get_text;
	index_record_count_t *index_record_count;

	int header_size;
	int index_record_size;
};

class MessageState {
public:
	int getSpecific(MessageTuple *t);
	int getNext();
	int getTalker();
	int getLength();
	int getText(char *buffer, int length);
	int loadRes(int module);

public: // TODO: hide the internals
	int initialized;
	MessageHandler *handler;
	ResourceManager *resmgr;
	Resource *current_res;
	int _module;
	int record_count;
	byte *index_records;
	IndexRecordCursor engine_cursor;
};

void message_state_initialize(ResourceManager *resmgr, MessageState *state);

} // End of namespace Sci

#endif // SCI_ENGINE_MESSAGE_H