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


#include "Enemy.h"
#include "Kismet/GameplayStatics.h"
#include "Sound/SoundCue.h"
#include "Particles/ParticleSystemComponent.h"

// Sets default values
AEnemy::AEnemy() :
	Health(100.f),
	MaxHealth(100.f),
	HealthBarDisplayTime(4.f)
{
 	// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = true;

}

// Called when the game starts or when spawned
void AEnemy::BeginPlay()
{
	Super::BeginPlay();

	GetMesh()->SetCollisionResponseToChannel(ECollisionChannel::ECC_Visibility, ECollisionResponse::ECR_Block);
}

void AEnemy::ShowHealthBar_Implementation()
{
	GetWorldTimerManager().ClearTimer(HealthBarTimer);
	GetWorldTimerManager().SetTimer(HealthBarTimer, this, &AEnemy::HideHealthBar, HealthBarDisplayTime);
}

// Called every frame
void AEnemy::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);

}

// Called to bind functionality to input
void AEnemy::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{
	Super::SetupPlayerInputComponent(PlayerInputComponent);

}

void AEnemy::BulletHit_Implementation(FHitResult HitResult)
{
	if (ImpactSound)
	{
		UGameplayStatics::PlaySoundAtLocation(this, ImpactSound, GetActorLocation());
	}

	if (ImpactParticles)
	{
		UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ImpactParticles, HitResult.Location, FRotator(0.f), true);
	}
	
	ShowHealthBar();
}

float AEnemy::TakeDamage(float DamageAmount, FDamageEvent const& DamageEvent, AController* EventInstigator,
	AActor* DamageCauser)
{
	float DamageInflicted = DamageAmount;
	if (Health - DamageAmount <= 0.f)
	{
		DamageInflicted = Health; 
		Health = 0.f;
	}
	else
	{
		Health -= DamageAmount;
	}
	return DamageInflicted;
}