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

#pragma once

#include "CoreMinimal.h"
#include "RefinedRDApi.h"
#include "AssetRegistry/AssetRegistryModule.h"
#include "DataAssets/RRDADataAssetBase.h"
#include "DataAssets/RRDADirtDataAsset.h"
#include "Enums/RRDARPEnums.h"
#include "Resources/FGItemDescriptor.h"

#include "RRDADataAssetSubsystem.generated.h"

class IAssetRegistry;

UCLASS()
class REFINEDRDAPI_API URRDADataAssetSubsystem : public UWorldSubsystem
{
	GENERATED_BODY()

public:
	URRDADataAssetSubsystem();

	static URRDADataAssetSubsystem* Get(UObject* Context);
	static URRDADataAssetSubsystem* GetChecked(UObject* Context);

	/** Implement this for initialization of instances of the system */
	virtual void Initialize(FSubsystemCollectionBase& Collection) override;

	virtual void Deinitialize() override;

	/**
	 * Note: call this function only in the constructor of the subsystem OR if you change some mDisabled value in runtime to refresh cached data
	 */
	UFUNCTION(BlueprintCallable, Category = "RRDA|DataAsset")
	void StartScanForDataAssets();

	void ReCacheDirtDataAssets();
	void ReCacheTurbineDataAssets();
	void ReCacheBoilerDataAssets();
	void ReCacheCoolerDataAssets();
	void ReCacheHeaterDataAssets();

public:
	UFUNCTION(BlueprintPure, Category = "RRDA|DataAsset|FF")
	int32 GetAllDirtItems(TArray<TSubclassOf<UFGItemDescriptor>>& Items) const;
	
	UFUNCTION(BlueprintCallable, Category = "RRDA|DataAsset|FF")
	URRDADirtDataAsset* GetDataForDirtItem(TSubclassOf<UFGItemDescriptor> Item) const;

public:
	/**
	 * Find all data assets of a specific class
	 * @param OutDataAssets - Set of data assets
	 * @return true if found any data assets
	 */
	template<class T>
	bool FindAllDataAssetsOfClass(TSet<T*>& OutDataAssets);

	/**
	 * @note For testing purposes only it currently finds 0 assets
	 * @deprecated Use FindAllDataAssetsOfClass instead it uses GetDerivedClasses and get all assets of a specific class
	 */
	template<class T>
	bool FindAllDataAssetsOfClassUseRegistry(TSet<T*>& OutDataAssets);

private:
	UPROPERTY()
	TMap<TSubclassOf<UFGItemDescriptor>, class URRDADirtDataAsset*> mDirtAssets;
	
	TMap<int32, TMap<TSubclassOf<UFGItemDescriptor>, class URRDATurbineDataAsset*>> mTurbineAssets;
	TMap<int32, TMap<TSubclassOf<UFGItemDescriptor>, class URRDABoilerDataAsset*>> mBoilerAssets;
	TMap<ERRDACoolerType, TMap<TSubclassOf<UFGItemDescriptor>, class URRDACoolerDataAsset*>> mCoolerAssets;
	TMap<ERRDAHeaterType, TMap<TSubclassOf<UFGItemDescriptor>, class URRDAHeaterDataAsset*>> mHeaterAssets;

public:
	UPROPERTY(BlueprintReadOnly, Transient, Category = "RRDA|DataAsset")
	TSet<URRDADataAssetBase*> mDisabledDataAssets;

	UPROPERTY(BlueprintReadOnly, Transient, Category = "RRDA|DataAsset")
	TSet<URRDADataAssetBase*> mEnabledDataAssets;
};

template <class T>
bool URRDADataAssetSubsystem::FindAllDataAssetsOfClass(TSet<T*>& OutDataAssets)
{
	TArray<UClass*> FoundClasses;
	GetDerivedClasses(T::StaticClass(), FoundClasses, true);

	for (UClass* FoundClass : FoundClasses)
	{
		if(FoundClass->IsNative()) continue;
		
		if(URRDADataAssetBase* Asset = FoundClass->GetDefaultObject<URRDADataAssetBase>())
		{
			if(!URRDADataAssetBase::IsEnabled(Asset, GetWorld()))
			{
				UE_LOG(LogRRDApi, Error, TEXT("Asset Disabled: %s"), *FoundClass->GetPathName());
				continue;
			}
			OutDataAssets.Add(FoundClass->GetDefaultObject<T>());
			UE_LOG(LogRRDApi, Log, TEXT("Found %s"), *FoundClass->GetPathName());
		}
	}

	return OutDataAssets.Num() > 0;
}

template <class T>
bool URRDADataAssetSubsystem::FindAllDataAssetsOfClassUseRegistry(TSet<T*>& OutDataAssets)
{
	OutDataAssets.Empty();
	
	// Find list of all UStat, and USkill assets in Content Browser.
	FAssetRegistryModule& AssetRegistryModule = FModuleManager::LoadModuleChecked<FAssetRegistryModule>(FName("AssetRegistry"));
	IAssetRegistry& AssetRegistry = AssetRegistryModule.Get();

	TArray<FAssetData> AssetList;
	AssetRegistry.GetAssetsByClass(URRDADataAssetBase::StaticClass()->GetClassPathName(), AssetList, true);

	// Split assets into separate arrays.
	for (const FAssetData& Asset : AssetList) {
		UObject* Obj = Asset.GetAsset();

		if(URRDADataAssetBase* BaseAsset = Cast<URRDADataAssetBase>(Obj))
		{
			if(URRDADataAssetBase::IsEnabled(BaseAsset, GetWorld()))
			{
				UE_LOG(LogRRDApi, Log, TEXT("Found %s"), *BaseAsset->GetPathName());
				OutDataAssets.Add(Cast<T>(BaseAsset));
				mEnabledDataAssets.Add(BaseAsset);
			}
			
			UE_LOG(LogRRDApi, Warning, TEXT("Asset Disabled: %s"), *BaseAsset->GetPathName());
			mDisabledDataAssets.Add(BaseAsset);
		}
	}

	return OutDataAssets.Num() > 0;
}