/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */

#ifndef MAP_INFO_H
#define MAP_INFO_H

#include "MapParser.h"
#include "System/float3.h"
#include "System/float4.h"

#include <string>
#include <vector>

class LuaTable;
class MapParser;
#if !defined(HEADLESS) && !defined(NO_SOUND)
	struct EAXSfxProps;
#endif


class CMapInfo
{
public:
	/** Terrain type, there can be 256 of these:
	    "MAP\TerrainType0" up to "MAP\TerrainType255" */
	static constexpr int NUM_TERRAIN_TYPES = 256;

	/**
	 * @param mapFileName full path to map-file aka SMF
	 * @param mapHumanName human-readable mapname e.g. DeltaSiegeDry
	 */
	CMapInfo(const std::string& mapInfoFile, const std::string& mapHumanName);
	~CMapInfo();

	/* The settings are just public members because:

	   1) it's quite some work to encapsulate all of them, and
	   2) nothing too bad happens if you modify them, there are no complex
	      pointer members that really beg for encapsulation.

	   Instead of encapsulation it is as effective and much easier make the
	   global mapInfo const, ie. const CMapInfo* mapInfo;
	 */

	/* Note: this could (should) have been anonymous structures if only MSVC 8
	   didn't crap out on it.  Specifically, it craps out on any class with at
	   least 1 user defined non-inline constructor and at least 2 anonymous
	   structures, each with at least 1 object with a constructor in it.
	   In other words, it probably assigns the same name to each anonymous
	   structure, and later gets confused by that.

	   This sample code triggers the problem in MSVC:

		class A {
			A::A();
			struct { std::string s1; } a1;
			struct { std::string s2; } a2;
		};
		A::A() {}
	 */

	/** Global settings, ie. from "MAP" section. */
	struct map_t {
		std::string name;         ///< The human name as passed to the constructor.
		std::string description;  ///< "MAP\\Description"
		std::string author;

		float hardness;           ///< "MAP\\MapHardness"
		float gravity;            ///< negative elmos/frame^2 (NOT positive elmos/second^2 as in mapfile)
		float tidalStrength;
		float maxMetal;           ///< what metal value 255 in the metal map is worth
		float extractorRadius;    ///< extraction radius for mines
		float voidAlphaMin;

		bool  notDeformable;
		bool  voidWater;
		bool  voidGround;
	} map;

	/** GUI settings (used by CGuiHandler) */
	struct gui_t {
		bool autoShowMetal;
	} gui;

	/** settings read from "MAP\ATMOSPHERE" section */
	struct atmosphere_t {
		float  fluidDensity; ///< in kg/m^3
		float  cloudDensity;
		float  fogStart;
		float  fogEnd;
		float4 fogColor;
		float3 skyColor;
		float3 skyDir;
		float3 sunColor;
		float3 cloudColor;
		float  minWind;
		float  maxWind;
		std::string skyBox;
	} atmosphere;

	/** settings read from "MAP\SPLATS" section */
	struct splats_t {
		float4 texScales;
		float4 texMults;
	} splats;

	/** settings read from "MAP\GRASS" section */
	struct grass_t {
		float bladeWaveScale; //! how strongly wind affects grass-blade waving (if 0, disables vertex animation)
		float bladeWidth;
		float bladeHeight;    //! actual blades will be (bladeHeight + randf(0, bladeHeight)) tall
		float bladeAngle;
		int maxStrawsPerTurf;
		float3 color;
		std::string bladeTexName;    // defaults to internally-generated texture
	} grass;

	/** settings read from "MAP\LIGHT" section */
	struct light_t {
		float4 sunDir;     ///< .xyz is direction vector; .w is intensity
		float3 groundAmbientColor;
		float3 groundDiffuseColor;
		float3 groundSpecularColor;
		float  groundShadowDensity;
		float4 modelAmbientColor;
		float4 modelDiffuseColor;
		float  modelShadowDensity;
		float3 modelSpecularColor;
		float  specularExponent;
	} light;

	/** settings read from "MAP\WATER" section
	    prefix their name with "Water" to get the TDF variable */
	struct water_t {
		float  fluidDensity;      ///< in kg/m^3
		float  repeatX;           ///< (calculated default is in IWater)
		float  repeatY;           ///< (calculated default is in IWater)
		float  damage;            ///< scaled by (UNIT_SLOWUPDATE_RATE / GAME_SPEED)
		float3 absorb;
		float3 baseColor;
		float3 minColor;
		float3 surfaceColor;
		float  surfaceAlpha;
		float4 planeColor;
		float3 diffuseColor;
		float3 specularColor;
		float  ambientFactor;
		float  diffuseFactor;
		float  specularFactor;
		float  specularPower;
		float  fresnelMin;
		float  fresnelMax;
		float  fresnelPower;
		float  reflDistortion;
		float  blurBase;
		float  blurExponent;
		float  perlinStartFreq;
		float  perlinLacunarity;
		float  perlinAmplitude;
		float  windSpeed;
		bool   shoreWaves;
		bool   forceRendering;    ///< if false the renderers will render it only if currentMinMapHeight<0
		bool   hasWaterPlane;     ///< true if "MAP\WATER\WaterPlaneColor" is set
		unsigned char numTiles;
		std::string texture;
		std::string foamTexture;
		std::string normalTexture;
		std::vector<std::string> causticTextures;
	} water;

	/** SMF specific settings */
	struct smf_t {
		std::string detailTexName;        ///< "MAP\DetailTex"
		std::string specularTexName;      ///< "MAP\SpecularTex"
		std::string splatDistrTexName;
		std::string splatDetailTexName;
		std::string grassShadingTexName;  // defaults to minimap texture
		std::string skyReflectModTexName;
		std::string blendNormalsTexName;
		std::string lightEmissionTexName;
		std::string parallaxHeightTexName;

		// Contains the splatted detail normal textures
		std::vector<std::string> splatDetailNormalTexNames;

		// SMF overrides
		std::string minimapTexName;
		std::string typemapTexName;
		std::string metalmapTexName;
		std::string grassmapTexName;

		std::vector<std::string> smtFileNames;

		float minHeight;
		float maxHeight;
		bool  minHeightOverride;
		bool  maxHeightOverride;

		// Controls whether the alpha channel of each splatted detail normal texture
		// contains a diffuse channel, which behaves like the old splatted detail textures
		bool splatDetailNormalDiffuseAlpha;
	} smf;

	struct pfs_t {
		struct legacy_constants_t {
		} legacy_constants;

		struct qtpfs_constants_t {
			unsigned int layersPerUpdate;
			unsigned int maxTeamSearches;
			unsigned int minNodeSizeX;
			unsigned int minNodeSizeZ;
			unsigned int maxNodeDepth;
			unsigned int numSpeedModBins;
			float        minSpeedModVal;
			float        maxSpeedModVal;
		} qtpfs_constants;
	} pfs;


	//If this struct is changed, please fix CReadMap::CalcTypemapChecksum accordingly
	struct TerrainType {
		std::string name;
		float hardness;
		float tankSpeed;   ///< "TankMoveSpeed"
		float kbotSpeed;   ///< "KbotMoveSpeed"
		float hoverSpeed;  ///< "HoverMoveSpeed"
		float shipSpeed;   ///< "ShipMoveSpeed"
		bool receiveTracks;
	};

	TerrainType terrainTypes[NUM_TERRAIN_TYPES];

	/**
	 * Sound EFX param structure
	 */
#if !defined(HEADLESS) && !defined(NO_SOUND)
	EAXSfxProps* efxprops;
#endif

private:
	void ReadGlobal();
	void ReadGui();
	void ReadAtmosphere();
	void ReadSplats();
	void ReadGrass();
	void ReadLight();
	void ReadWater();
	void ReadSMF();
	void ReadTerrainTypes();
	void ReadPFSConstants();
	void ReadSound();

	MapParser mapInfoParser; // map-info parser root table
	LuaTable* resTableRoot; // resource-parser root table
};

extern const CMapInfo* mapInfo;

#endif // MAP_INFO_H