#pragma once

#include "RuntimeHost.h"

#include <cstdint>
#include <filesystem>
#include <string>

class RuntimeSnapshotProvider;

class RuntimeStore
{
public:
	RuntimeStore();
	HealthTelemetry& GetHealthTelemetry();
	const HealthTelemetry& GetHealthTelemetry() const;

	bool InitializeStore(std::string& error);
	std::string BuildPersistentStateJson() const;
	bool PollStoredFileChanges(bool& registryChanged, bool& reloadRequested, std::string& error);

	bool CreateStoredLayer(const std::string& shaderId, std::string& error);
	bool DeleteStoredLayer(const std::string& layerId, std::string& error);
	bool MoveStoredLayer(const std::string& layerId, int direction, std::string& error);
	bool MoveStoredLayerToIndex(const std::string& layerId, std::size_t targetIndex, std::string& error);
	bool SetStoredLayerBypassState(const std::string& layerId, bool bypassed, std::string& error);
	bool SetStoredLayerShaderSelection(const std::string& layerId, const std::string& shaderId, std::string& error);
	bool SetStoredParameterValue(const std::string& layerId, const std::string& parameterId, const ShaderParameterValue& value, bool persistState, std::string& error);
	bool ResetStoredLayerParameterValues(const std::string& layerId, std::string& error);
	bool SaveStackPresetSnapshot(const std::string& presetName, std::string& error) const;
	bool LoadStackPresetSnapshot(const std::string& presetName, std::string& error);

	const std::filesystem::path& GetRuntimeRepositoryRoot() const;
	const std::filesystem::path& GetRuntimeUiRoot() const;
	const std::filesystem::path& GetRuntimeDocsRoot() const;
	const std::filesystem::path& GetRuntimeDataRoot() const;
	unsigned short GetConfiguredControlServerPort() const;
	unsigned short GetConfiguredOscPort() const;
	const std::string& GetConfiguredOscBindAddress() const;
	double GetConfiguredOscSmoothing() const;
	unsigned GetConfiguredMaxTemporalHistoryFrames() const;
	unsigned GetConfiguredPreviewFps() const;
	bool IsExternalKeyingConfigured() const;
	const std::string& GetConfiguredInputVideoFormat() const;
	const std::string& GetConfiguredInputFrameRate() const;
	const std::string& GetConfiguredOutputVideoFormat() const;
	const std::string& GetConfiguredOutputFrameRate() const;
	void SetBoundControlServerPort(unsigned short port);

	void SetCompileStatus(bool succeeded, const std::string& message);
	void ClearReloadRequest();

private:
	friend class RuntimeCoordinator;
	friend class RuntimeSnapshotProvider;
	bool LoadConfig(std::string& error);
	bool LoadPersistentState(std::string& error);
	bool SavePersistentState(std::string& error) const;
	bool ScanShaderPackages(std::string& error);
	std::string ReadTextFile(const std::filesystem::path& path, std::string& error) const;
	bool WriteTextFile(const std::filesystem::path& path, const std::string& contents, std::string& error) const;
	bool ResolvePaths(std::string& error);
	std::vector<std::string> GetStackPresetNamesLocked() const;
	std::string MakeSafePresetFileStem(const std::string& presetName) const;
	bool TryResolveStoredLayerAndParameterByControlKeyLocked(const std::string& layerKey, const std::string& parameterKey,
		RuntimeHost::LayerPersistentState*& matchedLayer, const ShaderPackage*& matchedPackage,
		std::vector<ShaderParameterDefinition>::const_iterator& parameterIt, std::string& error) const;
	bool CopyShaderPackageForStoredLayer(const std::string& layerId, ShaderPackage& shaderPackage, std::string& error) const;
	void GetShaderCompilerInputs(std::filesystem::path& repoRoot, std::filesystem::path& wrapperPath,
		std::filesystem::path& generatedGlslPath, std::filesystem::path& patchedGlslPath, unsigned& maxTemporalHistoryFrames) const;
	uint64_t GetRenderStateVersion() const;
	uint64_t GetParameterStateVersion() const;
	void AdvanceFrameCounter();
	void BuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
	bool TryBuildLayerRenderStates(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
	bool TryRefreshLayerParameters(std::vector<RuntimeRenderState>& states) const;
	void RefreshDynamicRenderStateFields(std::vector<RuntimeRenderState>& states) const;
	void BuildLayerRenderStatesLocked(unsigned outputWidth, unsigned outputHeight, std::vector<RuntimeRenderState>& states) const;
	void RefreshLayerParametersLocked(std::vector<RuntimeRenderState>& states) const;
	void RefreshDynamicRenderStateFieldsLocked(std::vector<RuntimeRenderState>& states) const;
	JsonValue BuildRuntimeStateValue() const;
	JsonValue SerializeLayerStack() const;

	mutable RuntimeHost mRuntimeHost;
};