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

#pragma once

#include "CoreMinimal.h"
#include "Wave.h"
#include "Subsystems/GameInstanceSubsystem.h"
#include "WaveSubsystem.generated.h"

/**
 * 
 */
UCLASS()
class SPACEBATTLER_API UWaveSubsystem : public UGameInstanceSubsystem
{
	GENERATED_BODY()
public:
	UFUNCTION(BlueprintCallable)
	void Init(TArray<UWave*> InWaves, int32 CurrWave);

	UFUNCTION(BlueprintCallable)
	int32 SpawnWave(float InVerticalSpacing, float InHorizontalOffset, int InNumRows);

protected:
	void SpawnUnits();
	
	UPROPERTY()
	TArray<UWave*> Waves;

	UPROPERTY(BlueprintReadOnly)
	int32 CurrentWave;

	UPROPERTY()
	TArray<UUnitInfo*> SpawnQueue;
	
	FTimerHandle SpawnTimerHandle;
	int32 NumRows;
	int32 LastSpawnIndex;
	float VerticalSpacing;
	float HorizontalOffset;
};