#pragma once

#include "CoreMinimal.h"
#include "GameFramework/CharacterMovementComponent.h"
#include "DescentCharacterMovement.generated.h"

/** Custom movement modes of the character (MOVE_Custom). */
namespace EDescentCustomMove
{
	enum Type : uint8 { None = 0, Swim = 1 };
}

/**
 * The character's movement (DESIGN_UE.md sections 3.1, 5.2, 5.3): walking with v2's velocity response and the settings that make it
 * ride the moving carrier, and swimming as a custom mode (PhysCustom): velocity response 2.2, slow sink, the Shear, a sweep so Tender
 * collision boxes block, then push-outs against the density field, the carrier hull and Tenders. No position clamp (requirement U7).
 */
UCLASS()
class THEDESCENT_API UDescentCharacterMovement : public UCharacterMovementComponent
{
	GENERATED_BODY()

public:
	UDescentCharacterMovement(const FObjectInitializer& ObjectInitializer);

	virtual void CalcVelocity(float DeltaTime, float Friction, bool bFluid, float BrakingDeceleration) override;
	virtual void PhysCustom(float DeltaTime, int32 Iterations) override;

	bool IsSwimMode() const { return MovementMode == MOVE_Custom && CustomMovementMode == EDescentCustomMove::Swim; }
	void StartSwim();

	/** Where the swimmer wants to go this tick (world, length <= 1) and whether it sprints; written by the character from the intent. */
	FVector SwimWish = FVector::ZeroVector;
	bool bSwimSprint = false;
	/** The speed penalty of hunger (1 until M8). */
	double HungerMul = 1.0;
	/** Rock contacts of the last swim step (state dump). */
	int32 SwimContacts = 0;
};