/* 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 TEENAGENT_OBJECTS_H
#define TEENAGENT_OBJECTS_H

#include "common/rect.h"
#include "graphics/surface.h"

namespace TeenAgent {

struct Rect {
	int16 left, top, right, bottom;

	inline Rect() : left(0), top(0), right(0), bottom(0), _base(NULL) {}

	inline Rect(uint16 l, uint16 t, uint16 r, uint16 b) : left(l), top(t), right(r), bottom(b), _base(NULL) {}

	inline bool in(const Common::Point &point) const {
		return point.x >= left && point.x <= right && point.y >= top && point.y <= bottom;
	}

	inline Common::Point center() const {
		return Common::Point((right + left) / 2, (bottom + top) / 2);
	}

	inline bool valid() const {
		return left >= 0 && left < 320 && right >= 0 && right < 320 && top >= 0 && top < 200 && bottom >= 0 && bottom < 200;
	}

	void render(Graphics::Surface *surface, uint8 color) const;

	void dump() const {
		debug(0, "rect[%u, %u, %u, %u]", left, top, right, bottom);
	}

	inline void clear() {
		left = top = right = bottom = 0;
	}
	
	void load(byte *src); //8 bytes
	void save() const;
	
	inline bool intersects_hline(int x1, int x2, int y) const {
		if (x1 > x2)
			SWAP(x1, x2);
		return y >= top && y <= bottom && x1 <= right && x2 >= left;
	}

	inline bool intersects_vline(int x, int y1, int y2) const {
		if (y1 > y2)
			SWAP(y1, y2);
		return x >= left && x <= right && y1 <= bottom && y2 >= top;
	}
	
	inline bool contains(const Rect & rect) const {
		return rect.left >= left && rect.right <= right && rect.top >= top && rect.bottom <= bottom;
	}
	
	inline Common::Point closest_to(const Common::Point & src) const {
		Common::Point p(src);
		if (p.x < left)
			p.x = left;
		if (p.x > right)
			p.x = right;

		if (p.y < top)
			p.y = top;
		if (p.y > bottom)
			p.y = bottom;
		return p;
	}

protected:
	byte * _base;
};

struct Object {
	enum {kActorUp = 1, kActorRight = 2, kActorDown = 3, kActorLeft = 4 };

	byte id; //0
	Rect rect; //1
	Rect actor_rect; //9
	byte actor_orientation; //17
	byte enabled; //18
	//19
	Common::String name, description;

	Object(): _base(NULL) {}
	void dump() const;
	void setName(const Common::String &name);
	void load(byte *addr);
	void save() const;
	
	static Common::String parse_description(const char *name);

protected:
	byte * _base;
};

struct InventoryObject {
	byte id;
	byte animated;
	Common::String name, description;
	
	InventoryObject(): id(0), animated(0), _base(0) {}
	void load(byte *addr);

protected:
	byte * _base;
};

struct UseHotspot {
	byte inventory_id;
	byte object_id;
	byte orientation;
	uint16 actor_x, actor_y;
	uint16 callback;
	void load(byte *src);
	void dump() const;
};

struct Walkbox {
	byte type;
	byte orientation;
	Rect rect;
	byte top_side_hint;
	byte right_side_hint;
	byte bottom_side_hint;
	byte left_side_hint;

	Walkbox() : _base(NULL) {}
	void dump() const;
	void load(byte *src);
	void save() const;

protected:
	byte * _base;
};

//\todo move it to util.h?
template<typename T> inline T SIGN (T x) { return (x > 0)? 1: ((x < 0)? -1: 0); }

} // End of namespace TeenAgent

#endif