// Lot CAM2 (CAM2-SPEC-01 rev. 3 § 12.4, F2-B) - voir LPRoomBoundsCameraModifier.h

#include "LPRoomBoundsCameraModifier.h"

#include "Camera/PlayerCameraManager.h"
#include "GameFramework/Actor.h"

void ULPRoomBoundsCameraModifier::SetBounds(AActor* InViewTarget, bool bInRoom, const FBox& InAllowed, bool bInWall, int32 InWallAxis,
	double InWallLimit, double InWallSign, const FBox2D& InWallSpan)
{
	BoundedView = InViewTarget;
	bRoom = bInRoom && InAllowed.IsValid;
	Allowed = InAllowed;
	bWall = bInWall && InWallSpan.bIsValid;
	WallAxis = InWallAxis == 1 ? 1 : 0;
	WallLimit = InWallLimit;
	WallSign = InWallSign < 0.0 ? -1.0 : 1.0;
	WallSpan = InWallSpan;
}

bool ULPRoomBoundsCameraModifier::ConsumeCorrection(FVector& OutBefore, FVector& OutAfter, FString& OutWhat)
{
	if (!bCorrected)
	{
		return false;
	}
	OutBefore = CorrectedBefore;
	OutAfter = CorrectedAfter;
	OutWhat = CorrectedWhat;
	bCorrected = false;
	return true;
}

void ULPRoomBoundsCameraModifier::SetStudio(AActor* InStudioView, const FVector& InOffset)
{
	StudioView = InStudioView;
	StudioOffset = InOffset;
}

bool ULPRoomBoundsCameraModifier::ModifyCamera(float DeltaTime, FMinimalViewInfo& InOutPOV)
{
	// Studio de creation (S1-C++) : la vue des cameras du studio est decalee du meme vecteur que le personnage edite.
	const AActor* Studio = StudioView.Get();
	if (Studio && CameraOwner && CameraOwner->GetViewTarget() == Studio)
	{
		InOutPOV.Location += StudioOffset;
	}

	// Jamais hors de la vue designee : la cible de vue est relue a chaque image (C1, POV, Overview, C2 ne sont jamais bornes).
	const AActor* Target = BoundedView.Get();
	if (!Target || !CameraOwner || CameraOwner->GetViewTarget() != Target || (!bRoom && !bWall))
	{
		return false;
	}
	const FVector Before = InOutPOV.Location;
	FVector Location = Before;
	FString What;
	if (bRoom)
	{
		if (Location.X < Allowed.Min.X) { Location.X = Allowed.Min.X; What += TEXT("mur X- "); }
		if (Location.X > Allowed.Max.X) { Location.X = Allowed.Max.X; What += TEXT("mur X+ "); }
		if (Location.Y < Allowed.Min.Y) { Location.Y = Allowed.Min.Y; What += TEXT("mur Y- "); }
		if (Location.Y > Allowed.Max.Y) { Location.Y = Allowed.Max.Y; What += TEXT("mur Y+ "); }
		if (Location.Z < Allowed.Min.Z) { Location.Z = Allowed.Min.Z; What += TEXT("sol "); }
		if (Location.Z > Allowed.Max.Z) { Location.Z = Allowed.Max.Z; What += TEXT("plafond "); }
	}
	if (bWall)
	{
		const int32 Other = 1 - WallAxis;
		const bool bInSpan = Location[Other] >= WallSpan.Min.X && Location[Other] <= WallSpan.Max.X
			&& Location.Z >= WallSpan.Min.Y && Location.Z <= WallSpan.Max.Y;
		if (bInSpan && (Location[WallAxis] - WallLimit) * WallSign < 0.0)
		{
			Location[WallAxis] = WallLimit;
			What += TEXT("mur du studio ");
		}
	}
	if (!Location.Equals(Before))
	{
		InOutPOV.Location = Location;
		bCorrected = true;
		CorrectedBefore = Before;
		CorrectedAfter = Location;
		CorrectedWhat = What.TrimEnd();
	}
	// Faux : les autres modificateurs de la liste s'appliquent ensuite.
	return false;
}