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

#pragma once

#include "CoreMinimal.h"
#include "BulletHitInterface.h"
#include "GameFramework/Character.h"
#include "Enemy.generated.h"

class UParticleSystem;
class USoundCue;
class UAnimMontage;
class UBehaviorTree;
class AEnemyController;

UCLASS()
class SHOOTER_API AEnemy : public ACharacter, public IBulletHitInterface
{
	GENERATED_BODY()

public:
	// Sets default values for this character's properties
	AEnemy();

protected:
	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

	UFUNCTION(BlueprintNativeEvent)
	void ShowHealthBar();
	void ShowHealthBar_Implementation();

	UFUNCTION(BlueprintImplementableEvent)
	void HideHealthBar();

	void Die();

	void PlayHitMontage(FName Section, float PlayRate = 1.0f);

	void ResetHitReactTimer();

	UFUNCTION(BlueprintCallable)
	void StoreHitNumber(UUserWidget* HitNumber, FVector Location);

	UFUNCTION()
	void DestroyHitNumber(UUserWidget* HitNumber);

	void UpdateHitNumbers();
private:
	/** Particles to spawn when hit by bullets */
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	UParticleSystem* ImpactParticles;

	/** Sound to play when hit by bullets */
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	USoundCue* ImpactSound;

	/** Current health */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Combat, meta = (AllowPrivateAccess = true))
	float Health;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	float MaxHealth;

	/** Name of the head bone */
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	FString HeadBone;

	/** Time to display health bar once shot */
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	float HealthBarDisplayTime;
	
	FTimerHandle HealthBarTimer;

	/** Montage containing Hit and Death animations */
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	UAnimMontage* HitMontage;

	FTimerHandle HitReactTimer;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	float HitReactTimeMin;
	
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	float HitReactTimeMax;

	bool bCanHitReact;

	/** Map to store HitNumber widgets and their hit locations */
	UPROPERTY(VisibleAnywhere, Category = Combat, meta = (AllowPrivateAccess = true))
	TMap<UUserWidget*, FVector> HitNumbers;

	/** Time before a hit number is removed from the screen */
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
	float HitNumberDestroyTime;

	/** Behavior tree for the AI Character */
	UPROPERTY(EditAnywhere, Category = "Behavior Tree", meta = (AllowPrivateAccess = true))
	UBehaviorTree* BehaviorTree;

	/** Point for the enemy to move to */
	UPROPERTY(EditAnywhere, Category = "Behavior Tree", meta = (AllowPrivateAccess = true, MakeEditWidget = true))
	FVector PatrolPoint;

	AEnemyController* EnemyController;
public:	
	// Called every frame
	virtual void Tick(float DeltaTime) override;

	// Called to bind functionality to input
	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;

	virtual void BulletHit_Implementation(FHitResult HitResult) override;

	virtual float TakeDamage(float DamageAmount, FDamageEvent const& DamageEvent, AController* EventInstigator, AActor* DamageCauser) override;

	FORCEINLINE FString GetHeadBone() const { return HeadBone; }

	UFUNCTION(BlueprintImplementableEvent)
	void ShowHitNumber(int32 Damage, FVector HitLocation, bool bHeadshot);
	
	FORCEINLINE UBehaviorTree* GetBehaviorTree() const { return BehaviorTree; }
};