#pragma once

#include <DB/Storages/AlterCommands.h>
#include <string>

namespace DB
{

class StorageReplicatedMergeTree;

/** Описание задачи перешардирования.
  */
struct ReshardingJob final
{
public:
	ReshardingJob() = default;

	/// Создаёт описание на основе его сериализованного представления.
	ReshardingJob(const std::string & serialized_job);

	ReshardingJob(const std::string & database_name_, const std::string & table_name_,
		const std::string & partition_, const WeightedZooKeeperPaths & paths_,
		const ASTPtr & sharding_key_expr_, const std::string & coordinator_id_);

	ReshardingJob(const ReshardingJob &) = delete;
	ReshardingJob & operator=(const ReshardingJob &) = delete;

	ReshardingJob(ReshardingJob &&) = default;
	ReshardingJob & operator=(ReshardingJob &&) = default;

	operator bool() const;

	/// Сериализует описание задачи.
	std::string toString() const;

	bool isCoordinated() const;

	void clear();

public:
	std::string database_name;
	std::string table_name;
	std::string partition;
	WeightedZooKeeperPaths paths;
	ASTPtr sharding_key_expr;
	std::string coordinator_id;
	StorageReplicatedMergeTree * storage = nullptr;
	UInt64 block_number = 0;
	bool is_aborted = false;
};

}