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

#include "Game/ShooterGameMode.h"
#include "GenericPlatform/GenericPlatformMisc.h"
#include "Containers/UnrealString.h"
#include "GameLiftClpTypes.h"
#include "GameLift/GameLiftClp.h"
#include "openssl/sha.h"



DEFINE_LOG_CATEGORY(LogShooterGameMode);

//  Function implementations.

AShooterGameMode::AShooterGameMode()
{
}

void AShooterGameMode::BeginPlay()
{
	Super::BeginPlay();
#if WITH_GAMELIFT
	InitGameLift();
#endif
}

void AShooterGameMode::InitGame(const FString& MapName, const FString& Options, FString& ErrorMessage)
{
	Super::InitGame(MapName, Options, ErrorMessage);
	CachedCommandLine = FCommandLine::Get();
	GameLiftConfig.ServerPort = cmdlineparser::details::GetConfiguredOrDefaultPort(CachedCommandLine, "port");
	if (FParse::Param(*CachedCommandLine, TEXT("-glAnywhereFleet")))
	{
		GameLiftConfig.bIsAnywhereFleet = true;
	}
	else
	{
		GameLiftConfig.bIsAnywhereFleet = false;
	}
	
	if (GameLiftConfig.bIsAnywhereFleet)
	{
		GetAnywhereFleetParameters(CachedCommandLine);
		LogAnywhereFleetParameters();
	}
}

FString AShooterGameMode::GetSHA256Hash(const FString& InString)
{
	
//	if (InString.IsEmpty()) return TEXT("da39a3ee5e6b4b0d3255bfef95601890afd80709");

	if (InString.IsEmpty()) 
		return TEXT("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");

	FSHA256Signature Hash;
	
	// Use OpenSSL to compute the SHA-256 hash
	
	FTCHARToUTF8 Utf8(InString);
	const uint8* Bytes = reinterpret_cast<const uint8*>(Utf8.Get());
	uint32 Length = Utf8.Length() * sizeof(UTF8CHAR);
	
	
	SHA256_CTX Sha256Context;
	SHA256_Init(&Sha256Context);
	SHA256_Update(&Sha256Context, Bytes,Length);
	SHA256_Final(Hash.Signature, &Sha256Context);
	
	return Hash.ToString();
	
	
	
	
	
	
/*	
	FSHA1 Sha;
	FTCHARToUTF8 Utf8(InString);
	Sha.Update((uint8*)Utf8.Get(), Utf8.Length() * sizeof(UTF8CHAR));
	Sha.Final();
	uint8 Hash[FSHA1::DigestSize];
	Sha.GetHash(Hash);
    
	// 40-char hex (SHA1 = 160 bits)
	return FString::Printf(TEXT("%08X%08X%08X%08X%08X"), 
		Hash[0], Hash[1], Hash[2], Hash[3], Hash[4]);
*/
}

void AShooterGameMode::InitGameLift()
{
	GetAnywhereFleetParameters(CachedCommandLine);
}

bool AShooterGameMode::GetAnywhereFleetParameters(FString CommandLineString)
{
	bool bAllAnywhereFleetParametersValid = true;
	cmdlineparser::details::FParseResult AuthResult = cmdlineparser::GetValueOfToken(CommandLineString, cmdlineparser::details::EAvailableTokens::AuthToken);
	if (AuthResult.bIsValid)
	{
		GameLiftConfig.AuthToken = AuthResult.Value;
#if UE_BUILD_DEBUG	
		UE_LOGFMT(LogShooterGameMode, Log, "AuthToken loaded: {0}", GameLiftConfig.AuthToken);
#else
		UE_LOGFMT(LogShooterGameMode, Log, "AuthToken loaded: HASH - {0}", GetSHA256Hash(GameLiftConfig.AuthToken));
#endif
		
	}
	else
	{
		bAllAnywhereFleetParametersValid = false;
#if UE_BUILD_DEBUG
		UE_LOGFMT(LogShooterGameMode, Error, "AuthToken Invalid: {0}", GameLiftConfig.AuthToken);
#else
		UE_LOGFMT(LogShooterGameMode, Error, "AuthToken Invalid: HASH - {0}", GetSHA256Hash(GameLiftConfig.AuthToken));
#endif
	}
	
	cmdlineparser::details::FParseResult HostIdResult = cmdlineparser::GetValueOfToken(CommandLineString, cmdlineparser::details::EAvailableTokens::HostId);
	if (HostIdResult.bIsValid)
	{
		GameLiftConfig.HostId = HostIdResult.Value;
		UE_LOGFMT(LogShooterGameMode, Log, "HostId loaded: {0}", GameLiftConfig.HostId);
	}
	else
	{
		bAllAnywhereFleetParametersValid = false;
		UE_LOGFMT(LogShooterGameMode, Error, "HostId Invalid: {0}", HostIdResult.Value);
	}
	
	cmdlineparser::details::FParseResult FleetIdResult = cmdlineparser::GetValueOfToken(CommandLineString, cmdlineparser::details::EAvailableTokens::FleetId);
	if (FleetIdResult.bIsValid)
	{
		GameLiftConfig.FleetId = FleetIdResult.Value;
		UE_LOGFMT(LogShooterGameMode, Log, "FleetId loaded: {0}", FleetIdResult.Value);
	}
	else
	{
		bAllAnywhereFleetParametersValid = false;
		UE_LOGFMT(LogShooterGameMode, Error, "FleetId Invalid: {0}", GameLiftConfig.HostId);
	}
	
	cmdlineparser::details::FParseResult WebSocketUrlResult = cmdlineparser::GetValueOfToken(CommandLineString, cmdlineparser::details::EAvailableTokens::WebsocketUrl);
	if (WebSocketUrlResult.bIsValid)
	{
		GameLiftConfig.WebSocketUrl = WebSocketUrlResult.Value;
		UE_LOGFMT(LogShooterGameMode, Log, "WebSocketUrl loaded: {0}", WebSocketUrlResult.Value);
	}
	else
	{
		bAllAnywhereFleetParametersValid = false;
		UE_LOGFMT(LogShooterGameMode, Error, "WebSocketUrl Invalid: {0}", WebSocketUrlResult.Value);
	}
	return bAllAnywhereFleetParametersValid;
}

void AShooterGameMode::LogAnywhereFleetParameters()
{
	UE_LOGFMT(LogShooterGameMode, Log, "Anywhere Fleet Parameters:");
	UE_LOGFMT(LogShooterGameMode, Log, "AuthToken: {0}", GameLiftConfig.AuthToken);
	UE_LOGFMT(LogShooterGameMode, Log, "FleetId: {0}", GameLiftConfig.FleetId);
	UE_LOGFMT(LogShooterGameMode, Log, "HostId: {0}", GameLiftConfig.HostId);
	UE_LOGFMT(LogShooterGameMode, Log, "WebsocketUrl: {0}", GameLiftConfig.WebSocketUrl);
	UE_LOGFMT(LogShooterGameMode, Log, "Server Port: {0}", GameLiftConfig.ServerPort);
}