#pragma once

#include "CoreMinimal.h"
#include "Components/ActorComponent.h"
#include "FQLightgrid.h"

#include "UQLightgridUpdaterComponent.generated.h"

// Indicates that the actor this is attached to is a concept that can affect cbot cognition.
// This can be as simple as a tagged actor that a cbot might decide to do a voiceline or animation on ("wow look at that very small crate")
// or it might indicate that this is a sovereign actor who will be causing interactions in the world.
UCLASS(BlueprintType, ClassGroup = (cbots), meta = (BlueprintSpawnableComponent))
class CADU_API UQLightgridUpdaterComponent : public UActorComponent
{
	GENERATED_BODY()

public:
	UQLightgridUpdaterComponent(const FObjectInitializer& init);

	virtual void BeginPlay() override;
	virtual void TickComponent(float delta, enum ELevelTick tick, FActorComponentTickFunction* tickFunc) override;

public:

	UPROPERTY(BlueprintReadOnly, EditAnywhere)
	UDataTable* lightgridMeta;

	UPROPERTY(BlueprintReadOnly, EditAnywhere)
	UDataTable* lightgridCells;

	UPROPERTY(BlueprintReadOnly, EditAnywhere)
	int metaRowIdx;

	UPROPERTY(BlueprintReadOnly, EditAnywhere)
	FName lightgridParamName;

	// if false, neartest grid cell colors will be used. This is similar to how Dark Engine looks.
	UPROPERTY(BlueprintReadWrite, EditAnywhere)
	bool useTrilerp = true;

	// If >0 and useTrilerp is true, this will "step" the resultant lerped value so that it's not a smooth gradient.
	// If <=0 or !useTrilerp, this has no effect.
	// A value of 1 is the same as not using trilerp, since each cell is considered to have one "step" inside.
	// A value of 10 approximates every cell as if it has 10 possible interpolated positions inside (interpolating with its neighbors).
	// A value of 2-4 here is usually about right for aesthetic purposes. Anything much higher and the effect is invisible, and much lower might as well just not trilerp.
	// As a direct comparison;
	// * Dark Engine = !useTrilerp
	// * Goldsrc = useTrilerp, trilerpSteps=2.5
	// * q3 = useTrilerp, trilerpSteps=0
	UPROPERTY(BlueprintReadWrite, EditAnywhere, meta=(UIMin=1.5, UIMax=4))
	float trilerpSteps = 2;

protected:

	UFUNCTION(BlueprintCallable)
	void updateMaterials(AActor* actor, FVector colorOverride);

	UFUNCTION(BlueprintCallable)
	FVector getAmbientColorForLocation(FVector loc);

	UFUNCTION(BlueprintCallable)
	FVector trilerpCellColors(FVector indices, FQLightgridMeta meta);
};