#pragma once

#include "RuntimeJson.h"

#include <cstddef>
#include <string>

class RuntimeStore;

enum class RuntimeCoordinatorCommittedStateMode
{
	Unchanged,
	UseCommittedStates,
	UseLiveSnapshots
};

enum class RuntimeCoordinatorRenderResetScope
{
	None,
	TemporalHistoryOnly,
	TemporalHistoryAndFeedback
};

struct RuntimeCoordinatorResult
{
	bool accepted = false;
	bool runtimeStateBroadcastRequired = false;
	bool shaderBuildRequested = false;
	bool clearTransientOscState = false;
	bool compileStatusChanged = false;
	bool compileStatusSucceeded = false;
	bool clearReloadRequest = false;
	RuntimeCoordinatorCommittedStateMode committedStateMode = RuntimeCoordinatorCommittedStateMode::Unchanged;
	RuntimeCoordinatorRenderResetScope renderResetScope = RuntimeCoordinatorRenderResetScope::None;
	std::string compileStatusMessage;
	std::string errorMessage;
};

class RuntimeCoordinator
{
public:
	explicit RuntimeCoordinator(RuntimeStore& runtimeStore);

	RuntimeCoordinatorResult AddLayer(const std::string& shaderId);
	RuntimeCoordinatorResult RemoveLayer(const std::string& layerId);
	RuntimeCoordinatorResult MoveLayer(const std::string& layerId, int direction);
	RuntimeCoordinatorResult MoveLayerToIndex(const std::string& layerId, std::size_t targetIndex);
	RuntimeCoordinatorResult SetLayerBypass(const std::string& layerId, bool bypassed);
	RuntimeCoordinatorResult SetLayerShader(const std::string& layerId, const std::string& shaderId);
	RuntimeCoordinatorResult UpdateLayerParameter(const std::string& layerId, const std::string& parameterId, const JsonValue& newValue);
	RuntimeCoordinatorResult UpdateLayerParameterByControlKey(const std::string& layerKey, const std::string& parameterKey, const JsonValue& newValue);
	RuntimeCoordinatorResult ResetLayerParameters(const std::string& layerId);
	RuntimeCoordinatorResult SaveStackPreset(const std::string& presetName);
	RuntimeCoordinatorResult LoadStackPreset(const std::string& presetName);

	RuntimeCoordinatorResult RequestShaderReload(bool preserveFeedbackState = false);
	RuntimeCoordinatorResult HandleRuntimePollFailure(const std::string& error);
	RuntimeCoordinatorResult HandlePreparedShaderBuildFailure(const std::string& error);
	RuntimeCoordinatorResult HandlePreparedShaderBuildSuccess();
	RuntimeCoordinatorResult HandleRuntimeReloadRequest();
	bool PreserveFeedbackOnNextShaderBuild() const;

private:
	RuntimeCoordinatorResult ApplyStoreMutation(bool succeeded, const std::string& errorMessage, bool reloadRequired, bool preserveFeedbackState);
	RuntimeCoordinatorResult BuildQueuedReloadResult(bool preserveFeedbackState);
	RuntimeCoordinatorResult BuildAcceptedNoReloadResult() const;

	RuntimeStore& mRuntimeStore;
	bool mPreserveFeedbackOnNextShaderBuild = false;
};