/* 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 KYRA_KYRA_V2_H
#define KYRA_KYRA_V2_H

#include "kyra/kyra.h"
#include "kyra/gui.h"
#include "kyra/wsamovie.h"

#include "common/list.h"
#include "common/hashmap.h"

namespace Kyra {

class Screen_v2;

class KyraEngine_v2 : public KyraEngine {
friend class Debugger_v2;
public:
	KyraEngine_v2(OSystem *system, const GameFlags &flags);
	~KyraEngine_v2();

	virtual Screen_v2 *screen_v2() const = 0;
protected:
	// run
	virtual void update() = 0;
	virtual void updateWithText() = 0;

	// MainMenu
	MainMenu *_menu;

	// Input
	virtual int checkInput(Button *buttonList, bool mainLoop = false) = 0;

	void updateInput();
	void removeInputTop();

	int _mouseX, _mouseY;

	struct Event {
		Common::Event event;
		bool causedSkip;

		Event() : event(), causedSkip(false) {}
		Event(Common::Event e) : event(e), causedSkip(false) {}
		Event(Common::Event e, bool skip) : event(e), causedSkip(skip) {}

		operator Common::Event() const { return event; }
	};
	Common::List<Event> _eventList;

	bool skipFlag() const;
	void resetSkipFlag(bool removeEvent = true);

	// Animator
	struct AnimObj {
		uint16 index;
		uint16 type;
		uint16 enabled;
		uint16 needRefresh;
		uint16 specialRefresh;
		uint16 animFlags;
		uint16 flags;
		int16 xPos1, yPos1;
		uint8 *shapePtr;
		uint16 shapeIndex1;
		uint16 animNum;
		uint16 shapeIndex3;
		uint16 shapeIndex2;
		int16 xPos2, yPos2;
		int16 xPos3, yPos3;
		int16 width, height;
		int16 width2, height2;
		uint16 palette;
		AnimObj *nextObject;
	};

	bool _drawNoShapeFlag;
	AnimObj *_animList;

	AnimObj *initAnimList(AnimObj *list, AnimObj *entry);
	AnimObj *addToAnimListSorted(AnimObj *list, AnimObj *entry);
	AnimObj *deleteAnimListEntry(AnimObj *list, AnimObj *entry);

	virtual void refreshAnimObjects(int force) = 0;
	void refreshAnimObjectsIfNeed();

	void flagAnimObjsSpecialRefresh();
	void flagAnimObjsForRefresh();

	virtual void clearAnimObjects() = 0;

	virtual void drawAnimObjects() = 0;
	virtual void drawSceneAnimObject(AnimObj *obj, int x, int y, int drawLayer) = 0;
	virtual void drawCharacterAnimObject(AnimObj *obj, int x, int y, int drawLayer) = 0;

	virtual void updateCharacterAnim(int) = 0;
	virtual void updateSceneAnim(int anim, int newFrame) = 0;

	virtual void addItemToAnimList(int item) = 0;
	virtual void deleteItemAnimEntry(int item) = 0;

	virtual void setCharacterAnimDim(int w, int h) = 0;
	virtual void resetCharacterAnimDim() = 0;

	// Scene
	struct SceneDesc {
		char filename1[10];
		char filename2[10];

		uint16 exit1, exit2, exit3, exit4;
		uint8 flags;
		uint8 sound;
	};

	SceneDesc *_sceneList;
	int _sceneListSize;
	uint16 _currentScene;

	uint16 _sceneExit1, _sceneExit2, _sceneExit3, _sceneExit4;
	int _sceneEnterX1, _sceneEnterY1, _sceneEnterX2, _sceneEnterY2,
		_sceneEnterX3, _sceneEnterY3, _sceneEnterX4, _sceneEnterY4;
	int _specialExitCount;
	uint16 _specialExitTable[25];
	bool checkSpecialSceneExit(int num, int x, int y);

	bool _overwriteSceneFacing;

	virtual void enterNewScene(uint16 newScene, int facing, int unk1, int unk2, int unk3) = 0;

	// Animation
	virtual void restorePage3() = 0;

	struct SceneAnim {
		uint16 flags;
		int16 x, y;
		int16 x2, y2;
		int16 width, height;
		uint16 specialSize;
		int16 shapeIndex;
		uint16 wsaFlag;
		char filename[14];
	};

	SceneAnim _sceneAnims[16];
	WSAMovieV2 *_sceneAnimMovie[16];

	void freeSceneAnims();

	bool _specialSceneScriptState[10];
	bool _specialSceneScriptStateBackup[10];
	EMCState _sceneSpecialScripts[10];
	uint32 _sceneSpecialScriptsTimer[10];
	int _lastProcessedSceneScript;
	bool _specialSceneScriptRunFlag;

	void updateSpecialSceneScripts();
	virtual int getFirstSpecialSceneScript() const = 0;

	// Shapes
	typedef Common::HashMap<int, uint8*> ShapeMap;
	ShapeMap _gameShapes;

	uint8 *getShapePtr(int index) const;
	void addShapeToPool(const uint8 *data, int realIndex, int shape);
	void addShapeToPool(uint8 *shpData, int index);
	void remShapeFromPool(int idx);
	
	// pathfinder
	int _movFacingTable[600];
	int _pathfinderFlag;

	int findWay(int curX, int curY, int dstX, int dstY, int *moveTable, int moveTableSize);

	bool directLinePassable(int x, int y, int toX, int toY);

	int pathfinderInitPositionTable(int *moveTable);
	int pathfinderAddToPositionTable(int index, int v1, int v2);
	int pathfinderInitPositionIndexTable(int tableLen, int x, int y);
	int pathfinderAddToPositionIndexTable(int index, int v);
	void pathfinderFinializePath(int *moveTable, int unk1, int x, int y, int moveTableSize);

	int _pathfinderPositionTable[400];
	int _pathfinderPositionIndexTable[200];
};

} // end of namespace Kyra

#endif