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

#pragma once

#include <filesystem>

namespace zen {

struct HydrationConfig
{
	// Location of server state to hydrate/dehydrate
	std::filesystem::path ServerStateDir;
	// Temporary directory available for use during hydration/dehydration
	std::filesystem::path TempDir;
	// Module ID of the server state being hydrated/dehydrated
	std::string ModuleId;
	// Back-end specific target specification (e.g. S3 bucket, file path, etc)
	std::string TargetSpecification;

	// Optional S3 endpoint override (e.g. "http://localhost:9000" for MinIO).
	std::string S3Endpoint;
	// Use path-style S3 URLs (endpoint/bucket/key) instead of virtual-hosted-style
	// (bucket.endpoint/key). Required for MinIO and other non-AWS endpoints.
	bool S3PathStyle = false;
};

/**
 * @brief State hydration strategy interface
 *
 * An instance of this interface is used to perform hydration OR
 * dehydration of server state. It's expected to be used only once
 * and not reused.
 *
 */
struct HydrationStrategyBase
{
	virtual ~HydrationStrategyBase() = default;

	virtual void Dehydrate()							  = 0;
	virtual void Hydrate()								  = 0;
	virtual void Configure(const HydrationConfig& Config) = 0;
};

std::unique_ptr<HydrationStrategyBase> CreateHydrator(const HydrationConfig& Config);

#if ZEN_WITH_TESTS
void hydration_forcelink();
#endif	// ZEN_WITH_TESTS

}  // namespace zen