// Fill out your copyright notice in the Description page of Project Settings.


#include "WheatherSystem.h"
#include <Camera/CameraComponent.h>

// Sets default values
AWheatherSystem::AWheatherSystem()
{
 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = true;

	RainComponent = CreateDefaultSubobject<UNiagaraComponent>(TEXT("RainComponent"));

	SnowComponent = CreateDefaultSubobject<UNiagaraComponent>(TEXT("SnowComponent"));

	RainComponent->bAutoActivate = false;
	SnowComponent->bAutoActivate = false;
	RainComponent->Deactivate();
	SnowComponent->Deactivate();

	SetActorLocation(FVector(0, 0, 0));

	if (Sun != NULL && DayCurve != NULL && Moon != NULL) {
		FRotator* SunRotation = new FRotator(0.0, 0.0, 0.0);
		FRotator* MoonRotation = new FRotator(0.0, 0.0, 0.0);

		SunRotation->Pitch = DayCurve->GetFloatValue(CurrentTime);
		MoonRotation->Pitch = DayCurve->GetFloatValue(CurrentTime) * -1;

		Moon->SetActorRotation(*MoonRotation);
		Sun->SetActorRotation(*SunRotation);

		UpdateWeather();
	}

}

// Called when the game starts or when spawned
void AWheatherSystem::BeginPlay()
{
	Super::BeginPlay();
	OneHoure = (DayLengthMiutes * 60) / 24;
	APawn* PlayerPawn = UGameplayStatics::GetPlayerPawn(this, 0);
	USceneComponent* PlayerRoot = PlayerPawn->GetRootComponent();
	UCameraComponent* PlayerCamera = PlayerPawn->FindComponentByClass<UCameraComponent>();

	RainComponent->AttachToComponent(PlayerCamera, FAttachmentTransformRules(EAttachmentRule::SnapToTarget, EAttachmentRule::KeepRelative, EAttachmentRule::KeepRelative, true));
	SnowComponent->AttachToComponent(PlayerCamera, FAttachmentTransformRules(EAttachmentRule::SnapToTarget, EAttachmentRule::KeepRelative, EAttachmentRule::KeepRelative, true));
	const FNiagaraParameterStore& RainParameterStore = RainComponent->GetOverrideParameters();
	const FNiagaraParameterStore& SnowParameterStore = SnowComponent->GetOverrideParameters();
	FNiagaraVariable Variable(FNiagaraTypeDefinition::GetFloatDef(), "SpawnRate");
	RainParameterStore.GetParameterValue(MaxRain, Variable);
	SnowParameterStore.GetParameterValue(MaxSnow, Variable);
}

// Called every frame
void AWheatherSystem::Tick(float DeltaTime)
{

	Super::Tick(DeltaTime);

	double newTime = CurrentTime + (DeltaTime / OneHoure);

	if (newTime > 24) {
		newTime = newTime - 24;
	}

	CurrentTime = newTime;

	if (Sun != NULL && DayCurve != NULL && Moon != NULL) {

		FRotator* SunRotation = new FRotator(0.0, 0.0, 0.0);
		FRotator* MoonRotation = new FRotator(0.0, 0.0, 0.0);

		// Sonnenbewegung
		SunRotation->Pitch = DayCurve->GetFloatValue(CurrentTime);

		// Mondbewegung
		MoonRotation->Pitch = SunRotation->Pitch - 180.0f;

		//Rotationen anwenden
		Sun->SetActorRotation(*SunRotation);
		Moon->SetActorRotation(*MoonRotation);

		UpdateWeather();
	}
}

void AWheatherSystem::UpdateWeather() {
	if (SunlightItensity != NULL && SkylightIntensity != NULL && WeatherTypeCurve != NULL) {

		float weatherType = WeatherTypeCurve->GetFloatValue(CurrentTime);

		Sun->GetLightComponent()->SetIntensity(
			FMath::Lerp(
				SunlightItensity->GetVectorValue(CurrentTime).X, 
				SunlightItensity->GetVectorValue(CurrentTime).Y,
				weatherType));

		SkyLight->GetLightComponent()->SetIntensity(
			FMath::Lerp(
				SkylightIntensity->GetVectorValue(CurrentTime).X,
				SkylightIntensity->GetVectorValue(CurrentTime).Y,
				weatherType));

	}

	UpdateRain();
	UpdateSnow();
	UpdateFog();

	Sun->GetLightComponent()->SetEnableLightShaftBloom(CurrentTime > 6.0 && CurrentTime < 18.0);
	Sun->GetComponent()->SetEnableLightShaftOcclusion(CurrentTime > 6.0 && CurrentTime < 18.0);
}

void AWheatherSystem::UpdateRain()
{
	if (bRain){
		if (RainTimelineCurve != NULL) {
			float CurrentIntensity = RainTimelineCurve->GetFloatValue(CurrentTime);
			if (CurrentIntensity <= 0.000001) {
				RainComponent->Deactivate();
			}
			else {
				RainComponent->Activate();
				RainComponent->SetFloatParameter("SpawnRate", MaxRain * CurrentIntensity);
			}
		}
	}
	else {
		RainComponent->Deactivate();
	}
}

void AWheatherSystem::UpdateSnow()
{
	if (bSnow){
		if (SnowTimelineCurve != NULL) {
			float CurrentIntensity = SnowTimelineCurve->GetFloatValue(CurrentTime);
			if (CurrentIntensity <= 0.000001) {
				SnowComponent->Deactivate();
			}
			else {
				SnowComponent->Activate();
				SnowComponent->SetFloatParameter("SpawnRate", MaxSnow * CurrentIntensity);
			}
		}
	}
	else {
		SnowComponent->Deactivate();
	}
}

void AWheatherSystem::UpdateFog()
{
	if (Fog != NULL) {
		UExponentialHeightFogComponent* FogComponent = Fog->GetComponent();
		if (bFog) {
			if (FogTimelineCurve != NULL) {
				
				FogComponent->SetFogDensity(FogTimelineCurve->GetFloatValue(CurrentTime));
			}
		}
		else {
			FogComponent->SetFogDensity(0.005);
		}
		if (FogHeightFalloffCurve != NULL) {
			FogComponent->SetFogHeightFalloff(FogHeightFalloffCurve->GetFloatValue(CurrentTime));
		}
	}
}