#pragma once

#include "CoreMinimal.h"

/**
 * The plain data types of the world definition (DESIGN_UE.md sections 2.2, 2.7 - 2.12): SDF primitives, deposits,
 * beacons, places. Metres, Unreal axes (+X down-canyon, +Y east, +Z up). Split from DescentWorldDef.h so the density
 * function (DescentSDF.h) and the definition (DescentWorldDef.h) can include each other's data without a cycle.
 */
namespace Descent::World
{
	/** 0 ferrite (orange, 60 cr), 1 cobalt (cyan, 120 cr), 2 pearl (magenta, 260 cr) (v2). */
	enum class EOreType : uint8
	{
		Ferrite = 0,
		Cobalt = 1,
		Pearl = 2,
	};

	/** The glow colour of an ore type (section 7.8, v2). */
	FLinearColor OreGlowColor(EOreType Type);
	const TCHAR* OreName(EOreType Type);

	/** One piece of a tube: a capsule of varying radius. Tube is an index into FDescentWorldDef::Tubes (-1 for a worm). */
	struct FSegment
	{
		FVector A = FVector::ZeroVector;
		FVector B = FVector::ZeroVector;
		double Ra = 0.0;
		double Rb = 0.0;
		bool bBig = false;   // carrier-scale: low wall noise, counts as a carrier route
		int32 Tube = -1;
	};

	/** An ellipsoid void. Radii are the semi-axes along X, Y, Z. */
	struct FChamber
	{
		FName Id;
		FVector C = FVector::ZeroVector;
		FVector R = FVector::OneVector;
		double K = 10.0;      // smooth-union blend
		bool bHonest = false; // full-pressure void (section 2.9)
	};

	/** A vertical cylinder void. */
	struct FWell
	{
		FName Id;
		double X = 0.0, Y = 0.0, R = 80.0, Z0 = 0.0, Z1 = 0.0;   // Z0 bottom, Z1 top
	};

	struct FPore
	{
		FVector C = FVector::ZeroVector;
		double R = 0.0;
	};

	/** Rock added back across a well: a thin slab with a slot too small for the carrier and a Tender crack. */
	struct FShelf
	{
		FName Id;
		double X = 0.0, Y = 0.0, Zc = 0.0, T = 3.0, Rclip = 88.0;
		FVector2D Axis = FVector2D(1.0, 0.0);   // unit vector along the slot, in plan
		double Half = 0.0, W = 0.0;             // slot half-length (end to end) and half-width
		TArray<FVector> Crack;
		double CrackR = 3.4;
	};

	/** Rock added back as an elliptical ring across a gallery. */
	struct FPinch
	{
		FName Id;
		FVector C = FVector::ZeroVector;
		FVector Dir = FVector::XAxisVector;
		FVector Side = FVector::YAxisVector;
		FVector Up = FVector::ZAxisVector;
		double Half = 0.0, Ax = 0.0, Ay = 0.0, TubeR = 34.0;
		int32 Tube = -1;
		double S = 0.0;   // metres along the gallery
	};

	/** Rock added back as an annulus inside a well. */
	struct FRing
	{
		FName Id;
		int32 Well = -1;
		double Zc = 0.0, Half = 7.0, RInner = 56.0;
	};

	struct FSpongeZone
	{
		FName Id;
		FBox Box = FBox(ForceInit);
	};

	/** A designed tube: a gallery (turtle path, big) or a Tender tube (Catmull-Rom through points). Pts are (X, Y, Z, radius). */
	struct FTube
	{
		FName Id;
		FString Name;
		bool bBig = false;
		TArray<FVector4> Pts;
		TArray<double> Cum;   // cumulative length along Pts (galleries)
		double Len = 0.0;
	};

	struct FDeposit
	{
		FVector A = FVector::ZeroVector;   // capsule end points
		FVector B = FVector::ZeroVector;
		double R = 0.0;
		EOreType Type = EOreType::Ferrite;
		FVector N = FVector::ZAxisVector;  // outward wall normal
		FVector P = FVector::ZeroVector;   // surface point the vein sits behind
		int32 Yield = 0;                   // loose chunks it gives when fully mined
	};

	struct FBeacon
	{
		FName Id;
		FString Name;
		FString Who;
		FVector P = FVector::ZeroVector;
		FString Text;
	};

	/** A named place for `Descent.World.Goto` and the tour scenarios. */
	struct FPlace
	{
		FName Name;
		FVector PosM = FVector::ZeroVector;
		FVector LookAtM = FVector::ZeroVector;   // a sensible thing to look at from there
	};

	/** The point of a gallery at a given distance along it. */
	struct FTubeSample
	{
		FVector P = FVector::ZeroVector;
		double R = 0.0;
		double YawRad = 0.0;
		double PitchRad = 0.0;
		FVector Dir = FVector::XAxisVector;
	};
}