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

#include "MyGameInstanceSubsystem.h"

#include "OnlineSubsystemUtils.h"

UMyGameInstanceSubsystem::UMyGameInstanceSubsystem() : CreateSessionCompleteDelegate(
	FOnCreateSessionCompleteDelegate::CreateUObject(this, &ThisClass::OnCreateSessionCompleted))
{
}


void UMyGameInstanceSubsystem::CreateSession(int32 NumPublicConnections, bool bIsLANMatch)
{
	const IOnlineSessionPtr SessionInterface = Online::GetSessionInterface(GetWorld());
	if (!SessionInterface.IsValid())
	{
		OnCreateSessionCompleteEvent.Broadcast(false);
		return;
	}

	LastSessionSettings = MakeShareable(new FOnlineSessionSettings());
	LastSessionSettings->NumPrivateConnections = 0;
	LastSessionSettings->NumPublicConnections = NumPublicConnections;
	LastSessionSettings->bAllowInvites = true;
	LastSessionSettings->bAllowJoinInProgress = true;
	LastSessionSettings->bAllowJoinViaPresence = true;
	LastSessionSettings->bAllowJoinViaPresenceFriendsOnly = true;
	LastSessionSettings->bIsDedicated = false;
	LastSessionSettings->bUsesPresence = true;
	LastSessionSettings->bIsLANMatch = bIsLANMatch;
	LastSessionSettings->bShouldAdvertise = true;

	LastSessionSettings->Set(SETTING_MAPNAME, FString("Your Level Name"),
	                         EOnlineDataAdvertisementType::ViaOnlineService);

	CreateSessionCompleteDelegateHandle = SessionInterface->AddOnCreateSessionCompleteDelegate_Handle(
		CreateSessionCompleteDelegate);

	const ULocalPlayer* localPlayer = GetWorld()->GetFirstLocalPlayerFromController();
	if (!SessionInterface->CreateSession(*localPlayer->GetPreferredUniqueNetId(), NAME_GameSession,
	                                     *LastSessionSettings))
	{
		SessionInterface->ClearOnCreateSessionCompleteDelegate_Handle(CreateSessionCompleteDelegateHandle);

		OnCreateSessionCompleteEvent.Broadcast(false);
	}
}

void UMyGameInstanceSubsystem::OnCreateSessionCompleted(FName SessionName, bool bSuccessful)
{
	const IOnlineSessionPtr SessionInterface = Online::GetSessionInterface(GetWorld());
	if (SessionInterface)
	{
		SessionInterface->ClearOnCreateSessionCompleteDelegate_Handle(CreateSessionCompleteDelegateHandle);
	}

	OnCreateSessionCompleteEvent.Broadcast(bSuccessful);
}

void UMyGameInstanceSubsystem::UpdateSession()
{
	const IOnlineSessionPtr SessionInterface = Online::GetSessionInterface(GetWorld());
	if (!SessionInterface.IsValid())
	{
		OnCreateSessionCompleteEvent.Broadcast(false);
		return;
	}

	const TSharedPtr<FOnlineSessionSettings> UpdatedSessionSettings = MakeShareable(
		new FOnlineSessionSettings(*LastSessionSettings));

	// Here we can insert any changes we want
	UpdatedSessionSettings->Set(SETTING_MAPNAME, FString("Updated Level Name"),
	                            EOnlineDataAdvertisementType::ViaOnlineService);

	UpdateSessionCompleteDelegateHandle =
		SessionInterface->AddOnUpdateSessionCompleteDelegate_Handle(UpdateSessionCompleteDelegate);

	if (!SessionInterface->UpdateSession(NAME_GameSession, *UpdatedSessionSettings))
	{
		SessionInterface->ClearOnUpdateSessionCompleteDelegate_Handle(UpdateSessionCompleteDelegateHandle);

		OnUpdateSessionCompleteEvent.Broadcast(false);
	}
	else
	{
		LastSessionSettings = UpdatedSessionSettings;
	}
}

void UMyGameInstanceSubsystem::OnUpdateSessionCompleted(FName SessionName, bool bSuccessful)
{
	const IOnlineSessionPtr sessionInterface = Online::GetSessionInterface(GetWorld());
	if (sessionInterface)
	{
		sessionInterface->ClearOnUpdateSessionCompleteDelegate_Handle(UpdateSessionCompleteDelegateHandle);
	}

	OnUpdateSessionCompleteEvent.Broadcast(bSuccessful);
}