Yamato/Source/MyProject3/EnemySpaceship.h

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "EnemySpaceship.generated.h"

// Define AI behavior states
UENUM(BlueprintType)
enum class EEnemyBehaviorState : uint8
{
    Chase,      // Actively pursue the player
    Attack,     // Stop and shoot at the player
    Retreat,    // Move away from player when too close
    Strafe,      // Move sideways while attacking
    Flank       // Execute flanking maneuver
};

UCLASS()
class MYPROJECT3_API AEnemySpaceship : public AActor
{
    GENERATED_BODY()

public:
    AEnemySpaceship();

protected:
    virtual void BeginPlay() override;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Components")
    UStaticMeshComponent* EnemyMesh;

    // Projectile spawn points
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Combat")
    USceneComponent* ProjectileSpawnPoint;

    // Add interpolation speed for smooth movement
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float InterpSpeed = 3.0f;

    // Add max acceleration to prevent sudden movements
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float MaxAcceleration = 2000.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float MovementSpeed = 1200.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float FlankingSpeed = 1200.0f;  // Even faster during flanking

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float FlankAngle = 60.0f;       // Angle for flanking maneuver

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float FlankDistance = 2000.0f;   // Distance to maintain during flanking

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float FlankPositionUpdateInterval = 1.0f;  // How often to update flank position

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float AttackRange = 4000.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float MinDistanceToPlayer = 1500.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float StrafeSpeed = 500.0f;

    // Add new property for minimum distance to other enemies
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float MinDistanceToOtherEnemies = 800.0f;

    // Add new property for optimal combat distance
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement")
    float OptimalCombatDistance = 2500.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Combat")
    float MaxHealth = 100.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Combat")
    float CurrentHealth = 100.0f;

    // Projectile class to spawn
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Combat")
    TSubclassOf<class AEnemyProjectile> ProjectileClass;

    // Firing properties
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Combat")
    float FireRate = 1.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Combat")
    float ProjectileSpeed = 2000.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Combat")
    float ProjectileDamage = 10.0f;

    // AI behavior properties
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "AI")
    EEnemyBehaviorState CurrentBehaviorState = EEnemyBehaviorState::Chase;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "AI")
    float BehaviorChangeTime = 3.0f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "AI")
    float StateChangeChance = 0.3f;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "AI")
    float AggressionFactor = 0.7f;   // Higher values make the enemy more likely to choose aggressive actions

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "AI")
    float FlankingFrequency = 0.6f;  // Increased chance of flanking (was 0.4f)

public:
    virtual void Tick(float DeltaTime) override;

    // Override TakeDamage to handle damage taken
    virtual float TakeDamage(float DamageAmount, struct FDamageEvent const& DamageEvent,
        class AController* EventInstigator, AActor* DamageCauser) override;

private:
    // Reference to player
    class ASpaceshipPawn* PlayerPawn;

    // Distance to player
    float DistanceToPlayer;

    // Fire control
    FTimerHandle FireTimerHandle;
    bool bCanFire = true;

    // Strafe direction (1 = right, -1 = left)
    float StrafeDirection = 1.0f;

    // Timer for changing behavior
    FTimerHandle BehaviorTimerHandle;

    // Helper functions
    void Fire();
    void ResetFire();
    void UpdateBehaviorState();
    void ChangeBehaviorState();
    void Die();

	void SmoothMove(const FVector& TargetLocation, float DeltaTime);

    // AI behavior implementation functions
    void PerformChase(float DeltaTime);
    void PerformAttack(float DeltaTime);
    void PerformRetreat(float DeltaTime);
    void PerformStrafe(float DeltaTime);
	void PerformFlank(float DeltaTime);

    FVector CalculatePositionAwayFromOtherEnemies();
	FVector CalculateFlankPosition();

    FVector CurrentVelocity;
    FVector TargetVelocity;
    FVector LastPosition;

    FVector FlankPosition;
    float FlankTimer;
    bool bIsFlankingRight;
    FTimerHandle FlankUpdateTimer;

    float LastFlankUpdateTime;
    FVector CurrentFlankTarget;
    bool bInitializedFlank;
};