/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header$
 *
 */

#ifndef QUEENSTRUCTS_H
#define QUEENSTRUCTS_H

namespace Queen {


struct Box {
	int16 x1, y1, x2, y2;

	void readFrom(byte *&ptr) {
		x1 = (int16)READ_BE_UINT16(ptr); ptr += 2;
		y1 = (int16)READ_BE_UINT16(ptr); ptr += 2;
		x2 = (int16)READ_BE_UINT16(ptr); ptr += 2;
		y2 = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}

	int16 xDiff() const {
		return x2 - x1;
	}

	int16 yDiff() const {
		return y2 - y1;
	}

	bool intersects(int16 x, int16 y, uint16 w, uint16 h) const {
		return (x + w > x1) && (y + h > y1) && (x <= x2) && (y <= y2);
	}

	bool contains(int16 x, int16 y) const {
		return (x >= x1) && (x <= x2) && (y >= y1) && (y <= y2);
	}
};


struct Area {
	//! bitmask of connected areas
	int16 mapNeighbours;
	//! coordinates defining area limits
	Box box;
	//! scaling factors for bobs actors
	uint16 bottomScaleFactor, topScaleFactor;
	//! entry in ObjectData, object lying in this area
	uint16 object;

	void readFrom(byte *&ptr) {
		mapNeighbours = (int16)READ_BE_UINT16(ptr); ptr += 2;
		box.readFrom(ptr);
		bottomScaleFactor = READ_BE_UINT16(ptr); ptr += 2;
		topScaleFactor = READ_BE_UINT16(ptr); ptr += 2;
		object = READ_BE_UINT16(ptr); ptr += 2;
	}

	uint16 calcScale(int16 y) const {
		uint16 dy = box.y2 - box.y1;
		int16 ds = (int16)(topScaleFactor - bottomScaleFactor);
		uint16 scale = 0;
		
		if (dy)	// Prevent division-by-zero
			scale = ((((y - box.y1) * 100) / dy) * ds) / 100 + bottomScaleFactor;
		
		if (scale == 0)
			scale = 100;

		return scale;
	}

	int16 scaleDiff() const {
		return (int16)(topScaleFactor - bottomScaleFactor);
	}
};


struct WalkOffData {
	//! entry in ObjectData
	int16 entryObj;
	//! coordinates to reach
	uint16 x, y;

	void readFrom(byte *& ptr) {
		entryObj = (int16)READ_BE_UINT16(ptr); ptr += 2;
		x = READ_BE_UINT16(ptr); ptr += 2;
		y = READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct GraphicData {
	//! coordinates of object
	uint16 x, y;
	//! bank bobframes
	/*!
		<table>
			<tr>
				<td>lastFrame == 0</td>
				<td>non-animated bob (one frame)</td>
			</tr>
			<tr>
				<td>lastFrame < 0</td>
				<td>rebound animation</td>
			</tr>
			<tr>
				<td>firstFrame < 0</td>
				<td>bobAnimString (animation is described by a string)</td>
			</tr>
			<tr>
				<td>firstFrame > 0</td>
				<td>bobAnimNormal (animation is a sequence of frames)</td>
			</tr>
		</table>
	*/
	int16 firstFrame, lastFrame;
	//! moving speed of object
	uint16 speed;

	void readFrom(byte *& ptr) {
		x = READ_BE_UINT16(ptr); ptr += 2;
		y = READ_BE_UINT16(ptr); ptr += 2;
		firstFrame = (int16)READ_BE_UINT16(ptr); ptr += 2;
		lastFrame = (int16)READ_BE_UINT16(ptr); ptr += 2;
		speed = READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct ObjectData {
	//! entry in OBJECT_NAME (<0: object is hidden)
	int16 name;
	//! coordinates of object
	uint16 x, y;
	//! entry in OBJECT_DESCR
	uint16 description;
	//! associated object
	int16 entryObj;
	//! room in which this object is available
	uint16 room;
	//! state of the object (grab direction, on/off, default command...)
	uint16 state;
	//! entry in GraphicData (can be negative)
	/*!
		<table>
			<tr>
				<td>value</td>
				<td>description</td>
			</tr>
			<tr>
				<td>-4</td>
				<td>person object (right facing)</td>
			</tr>
			<tr>
				<td>-3</td>
				<td>person object (left facing)</td>
			</tr>
			<tr>
				<td>-2</td>
				<td>animated bob (off)</td>
			</tr>
			<tr>
				<td>-1</td>
				<td>static bob (off)</td>
			</tr>
			<tr>
				<td>[0..5000]</td>
				<td>static or animated bob (on)</td>
			</tr>
			<tr>
				<td>]5000.. [</td>
				<td>'paste down' bob</td>
			</tr>
		</table>
	*/
	int16 image;

	void readFrom(byte *& ptr) {
		name = (int16)READ_BE_UINT16(ptr); ptr += 2;
		x = READ_BE_UINT16(ptr); ptr += 2;
		y = READ_BE_UINT16(ptr); ptr += 2;
		description = READ_BE_UINT16(ptr); ptr += 2;
		entryObj = (int16)READ_BE_UINT16(ptr); ptr += 2;
		room = READ_BE_UINT16(ptr); ptr += 2;
		state = READ_BE_UINT16(ptr); ptr += 2;
		image = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct ObjectDescription {
	//! entry in ObjectData or ItemData
	uint16 object;
	//! type of the description
	/*!
		refer to select.c l.75-101
		<table>
			<tr>
				<td>value</td>
				<td>description</td>
			</tr>
			<tr>
				<td>0</td>
				<td>random but starts at first description</td>
			<tr>
				<td>1</td>
				<td>random</td>
			</tr>
			<tr>
				<td>2</td>
				<td>sequential with loop</td>
			</tr>
			<tr>
				<td>3</td>
				<td>sequential and set description to last</td>
			</tr>
		</table>
	*/
	uint16 type;
	//! last entry possible in OBJECT_DESCR for this object
	uint16 lastDescription;
	//! last description number used (in order to avoid re-using it)
	uint16 lastSeenNumber;

	void readFrom(byte *&ptr) {
		object = READ_BE_UINT16(ptr); ptr += 2;
		type = READ_BE_UINT16(ptr); ptr += 2;
		lastDescription = READ_BE_UINT16(ptr); ptr += 2;
		lastSeenNumber = READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct ItemData {
	//! entry in OBJECT_NAME
	int16 item;
	//! entry in OBJECT_DESCR
	uint16 description;
	//! state of the object
	uint16 state;
	//! bank bobframe 
	uint16 bobFrame;
	//! entry in OBJECT_DESCR (>0 if available)
	int16 sfxDescription;

	void readFrom(byte *&ptr) {
		item = (int16)READ_BE_UINT16(ptr); ptr += 2;
		description = READ_BE_UINT16(ptr); ptr += 2;
		state = READ_BE_UINT16(ptr); ptr += 2;
		bobFrame = READ_BE_UINT16(ptr); ptr += 2;
		sfxDescription = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct ActorData {
	//! room in which the actor is
	int16 room;
	//! bob number associated to this actor
	int16 bobNum;
	//! entry in ACTOR_NAME
	uint16 name;
	//! gamestate entry/value, actor is valid if GAMESTATE[slot] == value
	int16 gameStateSlot, gameStateValue;
	//! spoken text color
	uint16 color;
	//! bank bobframe for standing position of the actor
	uint16 bobFrameStanding;
	//! initial coordinates in the room
	uint16 x, y;
	//! entry in ACTOR_ANIM
	uint16 anim;
	//! bank to use to load the actor file
	uint16 bankNum;
	//! entry in ACTOR_FILE
	uint16 actorFile;

	void readFrom(byte *&ptr) {
		room = (int16)READ_BE_UINT16(ptr); ptr += 2;
		bobNum = (int16)READ_BE_UINT16(ptr); ptr += 2;
		name = READ_BE_UINT16(ptr); ptr += 2;
		gameStateSlot = (int16)READ_BE_UINT16(ptr); ptr += 2;
		gameStateValue = (int16)READ_BE_UINT16(ptr); ptr += 2;
		color = READ_BE_UINT16(ptr); ptr += 2;
		bobFrameStanding = READ_BE_UINT16(ptr); ptr += 2;
		x = READ_BE_UINT16(ptr); ptr += 2;
		y = READ_BE_UINT16(ptr); ptr += 2;
		anim = READ_BE_UINT16(ptr); ptr += 2;
		bankNum = READ_BE_UINT16(ptr); ptr += 2;
		actorFile = READ_BE_UINT16(ptr); ptr += 2;
	}

};


struct CmdListData {
	//! action to perform
	Verb verb;
	//! first object used in the action
	int16 nounObj1;
	//! second object used in the action
	int16 nounObj2;
	//! song to play (>0: playbefore, <0: playafter)
	int16 song;
	//! if set, P2_SET_AREAS must be called (using CmdArea)
	bool setAreas;
	//! if set, P3_SET_OBJECTS must be called (using CmdObject)
	bool setObjects;
	//! if set, P4_SET_ITEMS must be called (using CmdInventory)
	bool setItems;
	//! if set, P1_SET_CONDITIONS must be called (using CmdGameState)
	bool setConditions;
	//! graphic image of object
	int16 image;
	//! special section to execute
	/*!
		refer to execute.c l.423-451
		<table>
			<tr>
				<td>value</td>
				<td>description</td>
			</tr>
			<tr>
				<td>1</td>
				<td>use journal</td>
			</tr>
			<tr>
				<td>2</td>
				<td>use dress</td>
			</tr>
			<tr>
				<td>3</td>
				<td>use normal clothes</td>
			</tr>
			<tr>
				<td>4</td>
				<td>use underwear</td>
			</tr>
		</table>
	*/
	int16 specialSection;

	void readFrom(byte *&ptr) {
		verb = (Verb)READ_BE_UINT16(ptr); ptr += 2;
		nounObj1 = (int16)READ_BE_UINT16(ptr); ptr += 2;
		nounObj2 = (int16)READ_BE_UINT16(ptr); ptr += 2;
		song = (int16)READ_BE_UINT16(ptr); ptr += 2;
		setAreas = READ_BE_UINT16(ptr) != 0; ptr += 2;
		setObjects = READ_BE_UINT16(ptr) != 0; ptr += 2;
		setItems = READ_BE_UINT16(ptr) != 0; ptr += 2;
		setConditions = READ_BE_UINT16(ptr) != 0; ptr += 2;
		image = (int16)READ_BE_UINT16(ptr); ptr += 2;
		specialSection = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}

	bool match(Verb v, int16 obj1, int16 obj2) const {
		return verb == verb && nounObj1 == obj1 && nounObj2 == obj2;
	}
};


struct CmdArea {
	//! identifier of the command
	int16 id;
	//! area to turn off/on (<0: off, >0: on)
	int16 area;
	//! room in which the area must be changed
	int16 room;

	void readFrom(byte *&ptr) {
		id = (int16)READ_BE_UINT16(ptr); ptr += 2;
		area = (int16)READ_BE_UINT16(ptr); ptr += 2;
		room = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct CmdObject {
	//! identifier of the command
	int16 id;
	int16 dstObj; // >0: show, <0: hide
	int16 srcObj; // >0: copy from srcObj, 0: nothing, -1: delete dstObj

	void readFrom(byte *&ptr) {
		id = (int16)READ_BE_UINT16(ptr); ptr += 2;
		dstObj = (int16)READ_BE_UINT16(ptr); ptr += 2;
		srcObj = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct CmdInventory {
	//! identifier of the command
	int16 id;
	int16 dstItem; // <0: delete, >0: add
	int16 srcItem; // >0: valid

	void readFrom(byte *&ptr) {
		id = (int16)READ_BE_UINT16(ptr); ptr += 2;
		dstItem = (int16)READ_BE_UINT16(ptr); ptr += 2;
		srcItem = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct CmdGameState {
	//! identifier of the command
	int16 id;
	int16 gameStateSlot;
	int16 gameStateValue;
	int16 speakValue;

	void readFrom(byte *&ptr) {
		id = (int16)READ_BE_UINT16(ptr); ptr += 2;
		gameStateSlot = (int16)READ_BE_UINT16(ptr); ptr += 2;
		gameStateValue = (int16)READ_BE_UINT16(ptr); ptr += 2;
		speakValue = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct FurnitureData {
	//! room in which the furniture are
	int16 room;
	//! type of furniture (stored in GAMESTATE) 
	/*!
		<table>
			<tr>
				<td>value</td>
				<td>description</td>
			</tr>
			<tr>
				<td>]0..5000]</td>
				<td>static or animated</td>
			</tr>
			<tr>
				<td>]5000..[</td>
				<td>paste down</td>
			</tr>
		</table>
	*/
	int16 gameStateValue;

	void readFrom(byte *&ptr) {
		room = (int16)READ_BE_UINT16(ptr); ptr += 2;
		gameStateValue = (int16)READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct GraphicAnim {
	int16 keyFrame;
	int16 frame;
	uint16 speed;

	void readFrom(byte *&ptr) {
		keyFrame = (int16)READ_BE_UINT16(ptr); ptr += 2;
		frame = (int16)READ_BE_UINT16(ptr); ptr += 2;
		speed = READ_BE_UINT16(ptr); ptr += 2;
	}
};


struct AnimFrame {
	uint16 frame;
	uint16 speed;
};


struct Person {
	//! actor settings to use
	const ActorData *actor; // P_ROOM, P_BNUM, P_GAMES, P_VALUE, P_COLOR, P_STAND, P_X, P_Y
	//! name of the actor
	const char *name; // P_NAMEstr
	//! string animation
	const char *anim; // P_ANIMstr
	uint16 bobFrame; // SFRAME
	//! As the bank number may change, we can't re-use actor->bankNum
	uint16 bankNum; // P_BANK
};



} // End of namespace Queen

#endif