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


#include "QuestSystem.h"


// Sets default values for this component's properties
UQuestSystem::UQuestSystem()
{
	// Set this component to be initialized when the game starts, and to be ticked every frame.  You can turn these features
	// off to improve performance if you don't need them.
	PrimaryComponentTick.bCanEverTick = true;

	static ConstructorHelpers::FClassFinder<UUserWidget> QuestWidgetClass(TEXT("/Game/Blueprints/Quest_UI/Quest_UI"));
	QuestWidget = QuestWidgetClass.Class;
}


// Called when the game starts
void UQuestSystem::BeginPlay()
{
	Super::BeginPlay();
	PlayerInventory = GetOwner()->FindComponentByClass<UInventoryComponent>();
	PlayerInventory->OnInventoryUpdated.AddDynamic(this, &UQuestSystem::CheckActiveQuestConditions);
}


// Called every frame
void UQuestSystem::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
	Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
}

void UQuestSystem::CheckActiveQuestConditions()
{
	for (UQuest* Quest : ActiveQuests)
	{
		if (Quest->CheckConditions(GetWorldState()))
		{
			GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, TEXT("Quest Completed!"));
			CompletedQuests.Add(Quest);
			Quest->ApplyRewards(PlayerInventory);
		}
	}
}

UWorldState* UQuestSystem::GetWorldState() const
{
	UWorldState* WorldState = NewObject<UWorldState>();
	WorldState->Items = PlayerInventory->Items;
	WorldState->QuestFlags = QuestFlags;
	return WorldState;
}

bool UQuestSystem::AddQuest(UQuest* Quest)
{
	if (!Quest->CheckPreConditions(GetWorldState())) return false;
	ActiveQuests.Add(Quest);
	return true;
}

void UQuestSystem::AddQuestFlag(const FString FlagName, const bool FlagValue)
{
	QuestFlags.Add(FlagName, FlagValue);
	CheckActiveQuestConditions();
}

bool UQuestSystem::CheckPreConditions(UQuest* Quest) const
{
	if (Quest->CheckPreConditions(GetWorldState())) return true;
	return false;
}

bool UQuestSystem::HasActiveQuest(UQuest* Quest) const
{
	if (ActiveQuests.Contains(Quest)) return true;
	return false;
}