#pragma once

struct surfacephysicsparams_t {
	// vphysics physical properties
	float			friction;
	float			elasticity;				// collision elasticity - used to compute coefficient of restitution
	float			density;				// physical density (in kg / m^3)
	float			thickness;				// material thickness if not solid (sheet materials) in inches
	float			dampening;
};

struct surfaceaudioparams_t {
	float    reflectivity;             // like elasticity, but how much sound should be reflected by this surface
	float    hardnessFactor;           // like elasticity, but only affects impact sound choices
	float    roughnessFactor;          // like friction, but only affects scrape sound choices   
	float    roughThreshold;           // surface roughness > this causes "rough" scrapes, < this causes "smooth" scrapes
	float    hardThreshold;            // surface hardness > this causes "hard" impacts, < this causes "soft" impacts
	float    hardVelocityThreshold;    // collision velocity > this causes "hard" impacts, < this causes "soft" impacts   
	float    highPitchOcclusion;       //a value betweeen 0 and 100 where 0 is not occluded at all and 100 is silent (except for any additional reflected sound)
	float    midPitchOcclusion;
	float    lowPitchOcclusion;
};

struct surfacesoundnames_t {
	unsigned short    walkStepLeft;
	unsigned short    walkStepRight;
	unsigned short	  runStepLeft;
	unsigned short	  runStepRight;
	unsigned short    impactSoft;
	unsigned short    impactHard;
	unsigned short    scrapeSmooth;
	unsigned short    scrapeRough;
	unsigned short    bulletImpact;
	unsigned short    rolling;
	unsigned short    breakSound;
	unsigned short    strainSound;
};

struct surfacegameprops_t {
	float maxspeedfactor;
	float jumpfactor;
	float penetrationmodifier;
	float damagemodifier;
	uint16_t material;
	uint8_t climbable;
};

struct surfacedata_t {
	surfacephysicsparams_t	physics;	// physics parameters
	surfaceaudioparams_t	audio;		// audio parameters
	surfacesoundnames_t		sounds;		// names of linked sounds
	surfacegameprops_t		game;		// Game data / properties
};

class IPhysicsSurfaceProps
{
public:
	virtual ~IPhysicsSurfaceProps( void ) {}

	// parses a text file containing surface prop keys
	virtual int ParseSurfaceData( const char* pFilename, const char* pTextfile ) = 0;
	// current number of entries in the database
	virtual int SurfacePropCount( void ) const = 0;

	virtual int GetSurfaceIndex( const char* pSurfacePropName ) const = 0;
	virtual void GetPhysicsProperties( int surfaceDataIndex, float* density, float* thickness, float* friction, float* elasticity ) const = 0;

	virtual surfacedata_t* GetSurfaceData( int surfaceDataIndex ) = 0;
	virtual const char* GetString( unsigned short stringTableIndex ) const = 0;

	virtual const char* GetPropName( int surfaceDataIndex ) const = 0;

	// sets the global index table for world materials
	// UNDONE: Make this per-CPhysCollide
	virtual void SetWorldMaterialIndexTable( int* pMapArray, int mapSize ) = 0;

	// NOTE: Same as GetPhysicsProperties, but maybe more convenient
	//virtual void GetPhysicsParameters(int surfaceDataIndex, surfacephysicsparams_t* pParamsOut) const = 0;
};