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

#include "PakProject.h"
#include "PakProjectGameMode.h"
#include "Runtime/PakFile/Public/IPlatformFilePak.h"

//If I run the code in the editor mode(Both Constructer and BeginPlay),every thing is fine


APakProjectGameMode::APakProjectGameMode()
{
	//After packaging, If I run the code here,every thing work fine,I can load the UObject
	//LoadPak();
}

void APakProjectGameMode::BeginPlay()
{
	//After packaging,If I run the code here,I can mount the pak file ,but cannot load the UObject because there are editor only data in the pak file.
	LoadPak();
}

void APakProjectGameMode::LoadPak()
{
	FString SaveContentDir = FPaths::GameContentDir() + TEXT("Pak/OutPak.pak");
	IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
  
	FPakPlatformFile* PakPlatformFile = new FPakPlatformFile();
	PakPlatformFile->Initialize(&PlatformFile, TEXT(""));
	FPlatformFileManager::Get().SetPlatformFile(*PakPlatformFile);


	FPakFile PakFile(*SaveContentDir, false);
 
	FString MountPoint(FPaths::EngineContentDir());

	if (PakPlatformFile->Mount(*SaveContentDir, 0, *MountPoint))
	{
		UE_LOG(LogClass, Log, TEXT("Mount Success"));
		TArray<FString> FileList;

		PakFile.FindFilesAtPath(FileList, *PakFile.GetMountPoint(), true, false, true);
		FStreamableManager StreamableManager;

		FString AssetName = FileList[0];
		FString AssetShortName = FPackageName::GetShortName(AssetName);
		FString LeftStr;
		FString RightStr;
		
		AssetShortName.Split(TEXT("."), &LeftStr, &RightStr);
		AssetName = TEXT("/Engine/")  + LeftStr + TEXT(".") + LeftStr;
		FStringAssetReference reference = AssetName;

		UObject* LoadObject = StreamableManager.SynchronousLoad(reference);
		if (LoadObject != nullptr)
		{
			UE_LOG(LogClass, Log, TEXT("Object Load Success..."))
		}
		else
		{
			UE_LOG(LogClass, Log, TEXT("Can not Load asset..."))

		}
	}
	else
	{
		UE_LOG(LogClass, Error, TEXT("Mount Failed"));
	}
}