// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.

/*=============================================================================
	AndroidTargetPlatform.inl: Implements the FAndroidTargetPlatform class.
=============================================================================*/


/* FAndroidTargetPlatform structors
 *****************************************************************************/

#define LOCTEXT_NAMESPACE "FAndroidTargetPlatform"

static bool SupportsES2()
{
	// default to support ES2
	bool bBuildForES2 = true;
	GConfig->GetBool(TEXT("/Script/AndroidRuntimeSettings.AndroidRuntimeSettings"), TEXT("bBuildForES2"), bBuildForES2, GEngineIni);
	return bBuildForES2;
}

static bool SupportsAEP()
{
	// default to not supporting ES31
	bool bBuildForES31 = false;
	GConfig->GetBool(TEXT("/Script/AndroidRuntimeSettings.AndroidRuntimeSettings"), TEXT("bBuildForES31"), bBuildForES31, GEngineIni);
	return bBuildForES31;
}

template<class TPlatformProperties>
inline FAndroidTargetPlatform<TPlatformProperties>::FAndroidTargetPlatform( ) :
	DeviceDetection(nullptr)
{
	#if WITH_ENGINE
		FConfigCacheIni::LoadLocalIniFile(EngineSettings, TEXT("Engine"), true, *TTargetPlatformBase<TPlatformProperties>::PlatformName());
			TextureLODSettings = nullptr; // These are registered by the device profile system.
		StaticMeshLODSettings.Initialize(EngineSettings);
	#endif

	TickDelegate = FTickerDelegate::CreateRaw(this, &FAndroidTargetPlatform::HandleTicker);
	TickDelegateHandle = FTicker::GetCoreTicker().AddTicker(TickDelegate, 4.0f);
}


template<class TPlatformProperties>
inline FAndroidTargetPlatform<TPlatformProperties>::~FAndroidTargetPlatform()
{ 
	 FTicker::GetCoreTicker().RemoveTicker(TickDelegateHandle);
}


/* ITargetPlatform overrides
 *****************************************************************************/

template<class TPlatformProperties>
inline void FAndroidTargetPlatform<TPlatformProperties>::GetAllDevices( TArray<ITargetDevicePtr>& OutDevices ) const
{
	OutDevices.Reset();

	for (auto Iter = Devices.CreateConstIterator(); Iter; ++Iter)
	{
		OutDevices.Add(Iter.Value());
	}
}

template<class TPlatformProperties>
inline ECompressionFlags FAndroidTargetPlatform<TPlatformProperties>::GetBaseCompressionMethod( ) const
{
	return COMPRESS_ZLIB;
}

template<class TPlatformProperties>
inline ITargetDevicePtr FAndroidTargetPlatform<TPlatformProperties>::GetDefaultDevice( ) const
{
	// return the first device in the list
	if (Devices.Num() > 0)
	{
		auto Iter = Devices.CreateConstIterator();
		if (Iter)
		{
			return Iter.Value();
		}
	}

	return nullptr;
}

template<class TPlatformProperties>
inline ITargetDevicePtr FAndroidTargetPlatform<TPlatformProperties>::GetDevice( const FTargetDeviceId& DeviceId )
{
	if (DeviceId.GetPlatformName() == TTargetPlatformBase<TPlatformProperties>::PlatformName())
	{
		return Devices.FindRef(DeviceId.GetDeviceName());
	}

	return nullptr;
}

template<class TPlatformProperties>
inline bool FAndroidTargetPlatform<TPlatformProperties>::IsRunningPlatform( ) const
{
	return false; // This platform never runs the target platform framework
}


template<class TPlatformProperties>
inline bool FAndroidTargetPlatform<TPlatformProperties>::IsSdkInstalled(bool bProjectHasCode, FString& OutDocumentationPath) const
{
	OutDocumentationPath = FString("Shared/Tutorials/SettingUpAndroidTutorial");
	return true;
}


template<class TPlatformProperties>
inline bool FAndroidTargetPlatform<TPlatformProperties>::SupportsFeature( ETargetPlatformFeatures Feature ) const
{
	switch (Feature)
	{
		case ETargetPlatformFeatures::Packaging:
			return true;
			
		case ETargetPlatformFeatures::LowQualityLightmaps:
			return SupportsES2();
			
		case ETargetPlatformFeatures::HighQualityLightmaps:
		case ETargetPlatformFeatures::VertexShaderTextureSampling:
		case ETargetPlatformFeatures::Tessellation:
			return SupportsAEP();
			
		default:
			break;
	}
	
	return TTargetPlatformBase<TPlatformProperties>::SupportsFeature(Feature);
}


#if WITH_ENGINE

template<class TPlatformProperties>
inline void FAndroidTargetPlatform<TPlatformProperties>::GetAllPossibleShaderFormats( TArray<FName>& OutFormats ) const
{
	static FName NAME_OPENGL_ES2(TEXT("GLSL_ES2"));
	static FName NAME_GLSL_310_ES_EXT(TEXT("GLSL_310_ES_EXT"));

	// get project rendering support, default to ES2 and no ES31
	bool bBuildForES2 = true;
	bool bBuildForES31 = false;
	GConfig->GetBool(TEXT("/Script/AndroidRuntimeSettings.AndroidRuntimeSettings"), TEXT("bBuildForES2"), bBuildForES2, GEngineIni);
	GConfig->GetBool(TEXT("/Script/AndroidRuntimeSettings.AndroidRuntimeSettings"), TEXT("bBuildForES31"), bBuildForES31, GEngineIni);

	if (bBuildForES2)
	{
		OutFormats.AddUnique(NAME_OPENGL_ES2);
	}
	if (bBuildForES31)
	{
		OutFormats.AddUnique(NAME_GLSL_310_ES_EXT);
	}
}

template<class TPlatformProperties>
inline void FAndroidTargetPlatform<TPlatformProperties>::GetAllTargetedShaderFormats( TArray<FName>& OutFormats ) const
{
	GetAllPossibleShaderFormats(OutFormats);
}


template<class TPlatformProperties>
inline const FStaticMeshLODSettings& FAndroidTargetPlatform<TPlatformProperties>::GetStaticMeshLODSettings( ) const
{
	return StaticMeshLODSettings;
}


template<class TPlatformProperties>
inline void FAndroidTargetPlatform<TPlatformProperties>::GetTextureFormats( const UTexture* InTexture, TArray<FName>& OutFormats ) const
{
	check(InTexture);

	// The order we add texture formats to OutFormats is important. When multiple formats are cooked
	// and supported by the device, the first supported format listed will be used. 
	// eg, ETC1/uncompressed should always be last

	bool bNoCompression = InTexture->CompressionNone				// Code wants the texture uncompressed.
		|| (InTexture->LODGroup == TEXTUREGROUP_ColorLookupTable)	// Textures in certain LOD groups should remain uncompressed.
		|| (InTexture->LODGroup == TEXTUREGROUP_Bokeh)
		|| (InTexture->CompressionSettings == TC_EditorIcon)
		|| (InTexture->Source.GetSizeX() < 4)						// Don't compress textures smaller than the DXT block size.
		|| (InTexture->Source.GetSizeY() < 4)
		|| (InTexture->Source.GetSizeX() % 4 != 0)
		|| (InTexture->Source.GetSizeY() % 4 != 0);

	// Determine the pixel format of the compressed texture.
	if (bNoCompression && InTexture->HasHDRSource())
	{
		OutFormats.Add(AndroidTexFormat::NameRGBA16F);
	}
	else if (bNoCompression)
	{
		OutFormats.Add(AndroidTexFormat::NameBGRA8);
	}
	else if (InTexture->CompressionSettings == TC_HDR
		|| InTexture->CompressionSettings == TC_HDR_Compressed)
	{
		OutFormats.Add(AndroidTexFormat::NameRGBA16F);
	}
	else if (InTexture->CompressionSettings == TC_Normalmap)
	{
		AddTextureFormatIfSupports(AndroidTexFormat::NamePVRTC4, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameDXT5, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameATC_RGBA_I, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoETC2, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoETC1, OutFormats);
	}
	else if (InTexture->CompressionSettings == TC_Displacementmap)
	{
		OutFormats.Add(AndroidTexFormat::NameRGBA16F);
	}
	else if (InTexture->CompressionSettings == TC_VectorDisplacementmap)
	{
		OutFormats.Add(AndroidTexFormat::NameBGRA8);
	}
	else if (InTexture->CompressionSettings == TC_Grayscale)
	{
		OutFormats.Add(AndroidTexFormat::NameG8);
	}
	else if (InTexture->CompressionSettings == TC_Alpha)
	{
		OutFormats.Add(AndroidTexFormat::NameG8);
	}
	else if (InTexture->CompressionSettings == TC_DistanceFieldFont)
	{
		OutFormats.Add(AndroidTexFormat::NameG8);
	}
	else if (InTexture->bForcePVRTC4
		|| InTexture->CompressionSettings == TC_BC7)
	{
		AddTextureFormatIfSupports(AndroidTexFormat::NamePVRTC4, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameDXT5, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameATC_RGBA_I, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoETC2, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoETC1, OutFormats);
	}
	else if (InTexture->CompressionNoAlpha)
	{
		AddTextureFormatIfSupports(AndroidTexFormat::NamePVRTC2, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameDXT1, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameATC_RGB, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameETC2_RGB, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameETC1, OutFormats);
	}
	else if (InTexture->bDitherMipMapAlpha)
	{
		AddTextureFormatIfSupports(AndroidTexFormat::NamePVRTC4, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameDXT5, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameATC_RGBA_I, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoETC2, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoETC1, OutFormats);
	}
	else
	{
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoPVRTC, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoDXT, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoATC, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoETC2, OutFormats);
		AddTextureFormatIfSupports(AndroidTexFormat::NameAutoETC1, OutFormats);
	}
}


template<class TPlatformProperties>
void FAndroidTargetPlatform<TPlatformProperties>::GetReflectionCaptureFormats( TArray<FName>& OutFormats ) const
{
	if (SupportsAEP())
	{
		// use Full HDR with AEP
		OutFormats.Add(FName(TEXT("FullHDR")));
	}
	
	// always emit encoded
	OutFormats.Add(FName(TEXT("EncodedHDR")));
}


template<class TPlatformProperties>
const UTextureLODSettings& FAndroidTargetPlatform<TPlatformProperties>::GetTextureLODSettings() const
{
	return *TextureLODSettings;
}


template<class TPlatformProperties>
FName FAndroidTargetPlatform<TPlatformProperties>::GetWaveFormat( const class USoundWave* Wave ) const
{
	static bool formatRead = false;
	static FName NAME_FORMAT;

	if (!formatRead)
	{
		formatRead = true;

		FString audioSetting;
		if (!GConfig->GetString(TEXT("/Script/AndroidRuntimeSettings.AndroidRuntimeSettings"), TEXT("AndroidAudio"), audioSetting, GEngineIni))
		{
			audioSetting = TEXT("DEFAULT");
		}

#if WITH_OGGVORBIS
		if (audioSetting == TEXT("OGG") || audioSetting == TEXT("Default"))
		{
			static FName NAME_OGG(TEXT("OGG"));
			NAME_FORMAT = NAME_OGG;
		}
#else
		if (audioSetting == TEXT("OGG"))
		{
			UE_LOG(LogAudio, Error, TEXT("Attemped to select Ogg Vorbis encoding when the cooker is built without Ogg Vorbis support."));
		}
#endif
		else
		{
	
			// Otherwise return ADPCM as it'll either be option '2' or 'default' depending on WITH_OGGVORBIS config
			static FName NAME_ADPCM(TEXT("ADPCM"));
			NAME_FORMAT = NAME_ADPCM;
		}
	}
	return NAME_FORMAT;
}

#endif //WITH_ENGINE

template<class TPlatformProperties>
bool FAndroidTargetPlatform<TPlatformProperties>::SupportsVariants() const
{
	return true;
}

template<class TPlatformProperties>
FText FAndroidTargetPlatform<TPlatformProperties>::GetVariantTitle() const
{
	return LOCTEXT("AndroidVariantTitle", "Texture Format");
}

/* FAndroidTargetPlatform implementation
 *****************************************************************************/

template<class TPlatformProperties>
inline void FAndroidTargetPlatform<TPlatformProperties>::AddTextureFormatIfSupports( FName Format, TArray<FName>& OutFormats ) const
{
	if (SupportsTextureFormat(Format))
	{
		OutFormats.Add(Format);
	}
}


/* FAndroidTargetPlatform callbacks
 *****************************************************************************/

template<class TPlatformProperties>
inline bool FAndroidTargetPlatform<TPlatformProperties>::HandleTicker( float DeltaTime )
{
	QUICK_SCOPE_CYCLE_COUNTER(STAT_FAndroidTargetPlatform_HandleTicker);

	if (DeviceDetection == nullptr)
	{
		DeviceDetection = FModuleManager::LoadModuleChecked<IAndroidDeviceDetectionModule>("AndroidDeviceDetection").GetAndroidDeviceDetection();
	}

	TArray<FString> ConnectedDeviceIds;

	{
		FScopeLock ScopeLock(DeviceDetection->GetDeviceMapLock());

		auto DeviceIt = DeviceDetection->GetDeviceMap().CreateConstIterator();
		
		for (; DeviceIt; ++DeviceIt)
		{
			ConnectedDeviceIds.Add(DeviceIt.Key());

			// see if this device is already known
			if (Devices.Contains(DeviceIt.Key()))
			{
				continue;
			}

			const FAndroidDeviceInfo& DeviceInfo = DeviceIt.Value();

			// check if this platform is supported by the extensions and version
			if (!SupportedByExtensionsString(DeviceInfo.GLESExtensions, DeviceInfo.GLESVersion))
			{
				continue;
			}

			// create target device
			FAndroidTargetDevicePtr& Device = Devices.Add(DeviceInfo.SerialNumber);

			Device = MakeShareable(new FAndroidTargetDevice(*this, DeviceInfo.SerialNumber, GetAndroidVariantName()));

			Device->SetConnected(true);
			Device->SetModel(DeviceInfo.Model);
			Device->SetDeviceName(DeviceInfo.DeviceName);
			Device->SetAuthorized(!DeviceInfo.bUnauthorizedDevice);
			Device->SetVersions(DeviceInfo.SDKVersion, DeviceInfo.HumanAndroidVersion);

			DeviceDiscoveredEvent.Broadcast(Device.ToSharedRef());
		}
	}

	// remove disconnected devices
	for (auto Iter = Devices.CreateIterator(); Iter; ++Iter)
	{
		if (!ConnectedDeviceIds.Contains(Iter.Key()))
		{
			FAndroidTargetDevicePtr RemovedDevice = Iter.Value();
			RemovedDevice->SetConnected(false);

			Iter.RemoveCurrent();

			DeviceLostEvent.Broadcast(RemovedDevice.ToSharedRef());
		}
	}

	return true;
}

#undef LOCTEXT_NAMESPACE