// ==============================================================
//	This file is part of Glest (www.glest.org)
//
//	Copyright (C) 2001-2008 Martio Figueroa
//
//	You can redistribute this code 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
// ==============================================================

#ifndef _GLEST_GAME_WORLD_H_
#define _GLEST_GAME_WORLD_H_

#include "vec.h"
#include "math_util.h"
#include "resource.h"
#include "tech_tree.h"
#include "tileset.h"
#include "console.h"
#include "map.h"
#include "scenario.h"
#include "minimap.h"
#include "logger.h"
#include "stats.h"
#include "time_flow.h"
#include "upgrade.h"
#include "water_effects.h"
#include "faction.h"
#include "unit_updater.h"
#include "randomgen.h"
#include "game_constants.h"

namespace Glest{ namespace Game{

using Shared::Graphics::Quad2i;
using Shared::Graphics::Rect2i;
using Shared::Util::RandomGen;

class Faction;
class Unit;
class Config;
class Game;
class GameSettings;
class ScriptManager;
class Cartographer;
class RoutePlanner;

// =====================================================
// 	class World
//
///	The game world: Map + Tileset + TechTree
// =====================================================

class ExploredCellsLookupKey {
public:

	Vec2i pos;
	int sightRange;
	int teamIndex;
};

class ExploredCellsLookupItem {
public:

	int ExploredCellsLookupItemCacheTimerCountIndex;
	std::vector<SurfaceCell *> exploredCellList;
	std::vector<SurfaceCell *> visibleCellList;

	static time_t lastDebug;
};

class FowAlphaCellsLookupItem {
public:

	std::vector<Vec2i> surfPosList;
	std::vector<float> alphaList;

	static time_t lastDebug;
};

class World{
private:
	typedef vector<Faction> Factions;

	std::map<Vec2i, std::map<int, ExploredCellsLookupItem > > ExploredCellsLookupItemCache;
	std::map<int,ExploredCellsLookupKey> ExploredCellsLookupItemCacheTimer;
	int ExploredCellsLookupItemCacheTimerCount;

	std::map<Vec2i, std::map<int, FowAlphaCellsLookupItem > > FowAlphaCellsLookupItemCache;

public:
	static const int generationArea= 100;
	static const float airHeight;
	static const int indirectSightRange= 5;

private:

	Map map;
	Tileset tileset;
	//TechTree techTree;
	TechTree *techTree;
	TimeFlow timeFlow;
	Scenario scenario;

	UnitUpdater unitUpdater;
    WaterEffects waterEffects;
	Minimap minimap;
    Stats stats;	//BattleEnd will delete this object

	Factions factions;

	RandomGen random;

	ScriptManager* scriptManager;
	Cartographer *cartographer;
	RoutePlanner *routePlanner;

	int thisFactionIndex;
	int thisTeamIndex;
	int frameCount;
	//int nextUnitId;
	std::map<int,int> mapFactionNextUnitId;

	//config
	bool fogOfWarOverride;
	bool fogOfWar;
	int fogOfWarSmoothingFrameSkip;
	bool fogOfWarSmoothing;
	Game *game;
	Chrono chronoPerfTimer;
	bool perfTimerEnabled;

	bool staggeredFactionUpdates;

public:
	World();
	~World();
	void end(); //to die before selection does

	//get
	int getMaxPlayers() const						{return map.getMaxPlayers();}
	int getThisFactionIndex() const					{return thisFactionIndex;}
	int getThisTeamIndex() const					{return thisTeamIndex;}
	const Faction *getThisFaction() const			{return &factions[thisFactionIndex];}
	int getFactionCount() const						{return factions.size();}
	const Map *getMap() const 						{return &map;}
	const Tileset *getTileset() const 				{return &tileset;}
	const TechTree *getTechTree() const 			{return techTree;}
	const Scenario *getScenario() const 			{return &scenario;}
	const TimeFlow *getTimeFlow() const				{return &timeFlow;}
	Tileset *getTileset() 							{return &tileset;}
	Map *getMap() 									{return &map;}
	Cartographer* getCartographer()					{return cartographer;}
	RoutePlanner* getRoutePlanner()					{return routePlanner;}
	const Faction *getFaction(int i) const			{return &factions[i];}
	Faction *getFaction(int i) 						{return &factions[i];}
	const Minimap *getMinimap() const				{return &minimap;}
	const Stats *getStats() const					{return &stats;};
	Stats *getStats()								{return &stats;};
	const WaterEffects *getWaterEffects() const		{return &waterEffects;}
	int getNextUnitId(Faction *faction);
	int getFrameCount() const						{return frameCount;}

	//init & load
	void init(Game *game, bool createUnits);
	void loadTileset(const vector<string> pathList, const string &tilesetName, Checksum* checksum);
	void loadTileset(const string &dir, Checksum* checksum);
	void loadTech(const vector<string> pathList, const string &techName, set<string> &factions, Checksum* checksum);
	void loadMap(const string &path, Checksum* checksum);
	void loadScenario(const string &path, Checksum* checksum);

	//misc
	void update();
	Unit* findUnitById(int id);
	const UnitType* findUnitTypeById(const FactionType* factionType, int id);
	bool placeUnit(const Vec2i &startLoc, int radius, Unit *unit, bool spaciated= false);
	void moveUnitCells(Unit *unit);
	bool toRenderUnit(const Unit *unit, const Quad2i &visibleQuad) const;
	bool toRenderUnit(const Unit *unit) const;
	Unit *nearestStore(const Vec2i &pos, int factionIndex, const ResourceType *rt);

	//scripting interface
	void createUnit(const string &unitName, int factionIndex, const Vec2i &pos);
	void givePositionCommand(int unitId, const string &commandName, const Vec2i &pos);
	void giveProductionCommand(int unitId, const string &producedName);
	void giveUpgradeCommand(int unitId, const string &upgradeName);
	void giveResource(const string &resourceName, int factionIndex, int amount);
	int getResourceAmount(const string &resourceName, int factionIndex);
	Vec2i getStartLocation(int factionIndex);
	Vec2i getUnitPosition(int unitId);
	int getUnitFactionIndex(int unitId);
	int getUnitCount(int factionIndex);
	int getUnitCountOfType(int factionIndex, const string &typeName);

	Game * getGame() { return game; }

	std::vector<std::string> validateFactionTypes();
	std::vector<std::string> validateResourceTypes();

	void setFogOfWar(bool value);
	std::string DumpWorldToLog(bool consoleBasicInfoOnly = false) const;

	int getUpdateFps(int factionIndex) const;
	bool canTickWorld() const;

private:

	void initCells(bool fogOfWar);
	void initSplattedTextures();
	void initFactionTypes(GameSettings *gs);
	void initMinimap();
	void initUnits();
	void initMap();
	//void initExplorationState();

	//misc
	void tick();
	bool canTickFaction(int factionIdx);
	int tickFactionIndex();
	void computeFow(int factionIdxToTick=-1);
	void exploreCells(const Vec2i &newPos, int sightRange, int teamIndex);

	void updateAllFactionUnits();
	void underTakeDeadFactionUnits();
	void updateAllFactionConsumableCosts();
};

}}//end namespace

#endif