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/* 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.
 *
 */

/*
 * This code is based on the original source code of Lord Avalot d'Argent version 1.3.
 * Copyright (c) 1994-1995 Mike, Mark and Thomas Thurman.
 */

#ifndef AVALANCHE_PARSER_H
#define AVALANCHE_PARSER_H

#include "avalanche/enums.h"

#include "common/events.h"
#include "common/str.h"
#include "common/serializer.h"

namespace Avalanche {
class AvalancheEngine;

class Parser {
public:
	static const int16 kParserWordsNum = 277; // How many words does the parser know?
	static const int16 kFirstPassword = 88;   // words[kFirstPassword] should equal "TIROS".
	static const byte kPardon = 254;          // Didn't understand / wasn't given.
	static const byte kNothing = 250;
	static const byte kMoved = 0;             // This word was moved. (Usually because it was the subject of conversation.)

	struct VocabEntry {
		byte _number;
		Common::String _word;

		void init(byte number, Common::String word) {
			_number = number;
			_word = word;
		}
	};

	VocabEntry _vocabulary[kParserWordsNum];

	Common::String _realWords[11];
	VerbCode _verb;
	byte _thing;
	People _person;
	bool _polite;
	Common::String _inputText;
	Common::String _inputTextBackup;
	byte _inputTextPos;
	bool _quote;
	bool _cursorState;
	bool _weirdWord;

	byte _wearing; // what you're wearing

	Parser(AvalancheEngine *vm);

	void init();
	void parse();
	void doThat();
	void verbOpt(byte verb, Common::String &answer, char &ansKey);
	void drink();

	void handleInputText(const Common::Event &event);
	void handleBackspace();
	void handleReturn();
	void handleFunctionKey(const Common::Event &event);
	void plotText();
	void cursorOn();
	void cursorOff();
	void tryDropdown();
	int16 getPos(const Common::String &crit, const Common::String &src);
	void doVerb(VerbCode id);

	void resetVariables();
	void synchronize(Common::Serializer &sz);

private:
	AvalancheEngine *_vm;

	struct RankType {
		uint16 _score;
		char _title[20];
	};

	static const char *kCopyright;
	static const char *kVersionNum;

	Common::String _thats;
	byte _thing2;
	byte _sworeNum;     // number of times you've sworn
	byte _alcoholLevel; // Your blood alcohol level.
	bool _boughtOnion;  // Have you bought an onion yet?

	byte wordNum(Common::String word);
	void replace(Common::String oldChars, byte newChar);

	Common::String rank();
	Common::String totalTime();

	void clearWords();
	void cheatParse(Common::String codes);
	void stripPunctuation(Common::String &word);
	void displayWhat(byte target, bool animate, bool &ambiguous);
	bool doPronouns();
	void properNouns();
	void lookAround();
	void openDoor();
	void storeInterrogation(byte interrogation);
	void examineObject();
	bool isPersonHere();
	void exampers();
	bool isHolding();
	void openBox(bool isOpening);
	void examine();
	void inventory();
	void swallow();
	void peopleInRoom();
	void putProc();
	void notInOrder();
	void goToCauldron();
	bool giveToSpludwick();
	void cardiffClimbing();
	void already();
	void standUp();
	void getProc(char thing);
	void giveGeidaTheLute();
	void playHarp();
	void winSequence();
	void wipeText();
	void bossKey();
};

} // End of namespace Avalanche

#endif // AVALANCHE_PARSER_H