// Copyright Epic Games, Inc. All Rights Reserved.

/*=============================================================================
	WindowsTargetSettings.h: Declares the UWindowsTargetSettings class.
=============================================================================*/

#pragma once

#include "CoreMinimal.h"
#include "UObject/Object.h"
#include "AudioCompressionSettings.h"
#include "WindowsTargetSettings.generated.h"

UENUM()
enum class ECompilerVersion : uint8
{
	Default = 0,
	VisualStudio2015 = 1 UMETA(DisplayName = "Visual Studio 2015 (deprecated)"),
	VisualStudio2017 = 2 UMETA(DisplayName = "Visual Studio 2017"),
	VisualStudio2019 = 3 UMETA(DisplayName = "Visual Studio 2019"),
};
UENUM()
enum class EDefaultGraphicsRHI : uint8
{
	DefaultGraphicsRHI_Default = 0 UMETA(DisplayName = "Default"),
	DefaultGraphicsRHI_DX11 = 1 UMETA(DisplayName = "DirectX 11"),
	DefaultGraphicsRHI_DX12 = 2 UMETA(DisplayName = "DirectX 12"),
	DefaultGraphicsRHI_Vulkan = 3 UMETA(DisplayName = "Vulkan"),
};



/**
 * Implements the settings for the Windows target platform. The first instance of this class is initialized in
 * WindowsTargetPlatform, really early during the startup sequence before the CDO has been constructed, so its config 
 * settings are read manually from there.
 */
UCLASS(config=Engine, defaultconfig)
class WINDOWSTARGETPLATFORM_API UWindowsTargetSettings
	: public UObject
{
public:

	GENERATED_UCLASS_BODY()

	/** The compiler version to use for this project. May be different to the chosen IDE. */
	UPROPERTY(EditAnywhere, config, Category="Toolchain", Meta=(DisplayName="Compiler Version"))
	ECompilerVersion Compiler;

	/** 
	 * The collection of RHI's we want to support on this platform.
	 * This is not always the full list of RHI we can support.
	 */
	UPROPERTY(EditAnywhere, config, Category=Rendering)
	TArray<FString> TargetedRHIs;

	/** 
	 * Default Graphics RHI. Select which RHIto use. Make sure its also selected as a Targeted RHI
	 * Requires Editor restart
	 */
	UPROPERTY(EditAnywhere, config, Category="Targeted RHIs", Meta = (DisplayName = "Default RHI"))
	EDefaultGraphicsRHI DefaultGraphicsRHI;

	/** Sample rate to run the audio mixer with. */
	UPROPERTY(config, EditAnywhere, Category = "Audio", Meta = (DisplayName = "Audio Mixer Sample Rate"))
	int32 AudioSampleRate;

	/** The amount of audio to compute each callback block. Lower values decrease latency but may increase CPU cost. */
	UPROPERTY(config, EditAnywhere, Category = "Audio", meta = (ClampMin = "64", ClampMax = "4096", DisplayName = "Callback Buffer Size"))
	int32 AudioCallbackBufferFrameSize;

	/** The number of buffers to keep enqueued. More buffers increases latency, but can compensate for variable compute availability in audio callbacks on some platforms. */
	UPROPERTY(config, EditAnywhere, Category = "Audio", meta = (ClampMin = "1", UIMin = "1", DisplayName = "Number of Buffers To Enqueue"))
	int32 AudioNumBuffersToEnqueue;

	/** The max number of channels (voices) to limit for this platform. The max channels used will be the minimum of this value and the global audio quality settings. A value of 0 will not apply a platform channel count max. */
	UPROPERTY(config, EditAnywhere, Category = "Audio", meta = (ClampMin = "0", UIMin = "0", DisplayName = "Max Channels"))
	int32 AudioMaxChannels;

	/** The number of workers to use to compute source audio. Will only use up to the max number of sources. Will evenly divide sources to each source worker. */
	UPROPERTY(config, EditAnywhere, Category = "Audio", meta = (ClampMin = "0", UIMin = "0", DisplayName = "Number of Source Workers"))
	int32 AudioNumSourceWorkers;

	/** Which of the currently enabled spatialization plugins to use on Windows. */
	UPROPERTY(config, EditAnywhere, Category = "Audio")
	FString SpatializationPlugin;

	/** Which of the currently enabled reverb plugins to use on Windows. */
	UPROPERTY(config, EditAnywhere, Category = "Audio")
	FString ReverbPlugin;

	/** Which of the currently enabled occlusion plugins to use on Windows. */
	UPROPERTY(config, EditAnywhere, Category = "Audio")
	FString OcclusionPlugin;

	/** Audio Cook Settings */

	/** Various overrides for how this platform should handle compression and decompression */
	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio")
	FPlatformRuntimeAudioCompressionOverrides CompressionOverrides;

	/** When this is enabled, Actual compressed data will be separated from the USoundWave, and loaded into a cache. */
	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides", meta = (DisplayName = "Use Stream Caching (Experimental)"))
	bool bUseAudioStreamCaching;

	/** This determines the max amount of memory that should be used for the cache at any given time. If set low (<= 8 MB), it lowers the size of individual chunks of audio during cook. */
	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides|Stream Caching", meta = (DisplayName = "Max Cache Size (KB)"))
	int32 CacheSizeKB;

	/** This overrides the default max chunk size used when chunking audio for stream caching (ignored if < 0) */
	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides|Stream Caching", meta = (DisplayName = "Max Chunk Size Override (KB)"))
	int32 MaxChunkSizeOverrideKB;

	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides")
	bool bResampleForDevice;

	/** Mapping of which sample rates are used for each sample rate quality for a specific platform. */

	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides|ResamplingQuality", meta = (DisplayName = "Max"))
	float MaxSampleRate;

	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides|ResamplingQuality", meta = (DisplayName = "High"))
	float HighSampleRate;

	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides|ResamplingQuality", meta = (DisplayName = "Medium"))
	float MedSampleRate;

	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides|ResamplingQuality", meta = (DisplayName = "Low"))
	float LowSampleRate;

	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides|ResamplingQuality", meta = (DisplayName = "Min"))
	float MinSampleRate;

	/** Scales all compression qualities when cooking to this platform. For example, 0.5 will halve all compression qualities, and 1.0 will leave them unchanged. */
	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides")
	float CompressionQualityModifier;

	/** When set to anything beyond 0, this will ensure any SoundWaves longer than this value, in seconds, to stream directly off of the disk. */
	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides", meta = (DisplayName = "Stream All Soundwaves Longer Than: "))
	float AutoStreamingThreshold;

	/** Quality Level to COOK SoundCues at (if set, all other levels will be stripped by the cooker). */
	UPROPERTY(GlobalConfig, EditAnywhere, Category = "Audio|CookOverrides", meta = (DisplayName = "Sound Cue Cook Quality"))
	int32 SoundCueCookQualityIndex = INDEX_NONE;
};