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

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "BasePawn.h"
#include "AIController.h"
#include "LevelLocation.h"
#include "EnemySpawner.generated.h"

UCLASS()
class PRESIDENTSBRIGADE_API AEnemySpawner : public AActor
{
	GENERATED_BODY()
	
public:	
	// Sets default values for this actor's properties
	AEnemySpawner();

	// Called every frame
	virtual void Tick(float DeltaTime) override;
protected:
	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

	/**
	 * Delay between spawning each enemy in seconds.
	 */
	UPROPERTY(EditAnywhere, Category = "Enemy")
	float spawn_delay_s;

	/**
	 * Enemy pawn class.
	 */
	UPROPERTY(EditAnywhere, Category = "Enemy")
	TSubclassOf<ABasePawn> pawn_class;

	/**
	 * Enemy controller class.
	 */
	UPROPERTY(EditAnywhere, Category = "Enemy")
	TSubclassOf<AAIController> controller_class;

	/**
	 * Enemy spawn location marker.
	 */
	UPROPERTY(EditAnywhere, Category = "Enemy")
	UClass* marker_class;

	/**
	 * Max number of enemies to spawn in one cycle.
	 */
	UPROPERTY(EditAnywhere, Category = "Enemy")
	int max_spawn_count;

private:

	/**
	 * Level location.
	 */
	TUniquePtr<LevelLocation> level_location;

	/**
	 * Random number stream.
	 */
	FRandomStream random;

	/**
	 * Threshold in seconds to wait before spawning. 
	 */
	float next_spawn_threshold_s;

	/**
	 * Current wait time in seconds.
	 */
	float spawn_wait_s;
};