/* 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.
 *
 * MIT License:
 *
 * Copyright (c) 2009 Alexei Svitkine, Eugene Sandulenko
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#ifndef WAGE_SCRIPT_H
#define WAGE_SCRIPT_H
 
namespace Wage {

class Script {
public:
	Script(Common::SeekableReadStream *data) : _data(data) {}
	~Script();

private:
	Common::SeekableReadStream *_data;

	WageEngine *_callbacks;
	World *_world;
	int _loopCount;
	String *_inputText;
	Designed *_inputClick;
	bool _evalResult;
	bool _handled;

	class Operand {
	public:
		enum OperandTypes {
			OBJ = 0,
			CHR = 1,
			SCENE = 2,
			NUMBER = 3,
			STRING = 4,
			CLICK_INPUT = 5,
			TEXT_INPUT = 6
		};
		
		union {
			Obj *obj;
			Chr *chr;
			Scene *scene;
			int16 number;
			String *string;
			Designed *inputClick;
		} _value;
		OperandTypes _type;
		String _str;
		
		Operand(Obj *value, OperandTypes type) {
			_value.obj = value;
			_str = value->toString();
			_type = type;
		}

		Operand(Chr *value, OperandTypes type) {
			_value.chr = value;
			_str = value->toString();
			_type = type;
		}

		Operand(Scene *value, OperandTypes type) {
			_value.scene = value;
			_str = value->toString();
			_type = type;
		}

		Operand(int value, OperandTypes type) {
			_value.number = value;
			_str = value;
			_type = type;
		}

		Operand(String *value, OperandTypes type) {
			_value.string = value;
			_str = *value;
			_type = type;
		}

		Operand(Designed *value, OperandTypes type) {
			_value.inputClick = value;
			_str = value->toString();
			_type = type;
		}
	};


	bool execute(World *world, int loopCount, String *inputText, Designed *inputClick, WageEngine *callbacks);
	Operand *readOperand();
	Operand *readStringOperand();
	void processIf();
	void processMove();
	void processLet();

	void appendText(String str);

};

} // End of namespace Wage
 
#endif