/*******************************************************************************
 * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
 * Unauthorized copying of this file, via any medium is strictly prohibited.
 * Proprietary and confidential.
 ******************************************************************************/
#pragma once

#include "Meta.h"
#include "Options.h"
#include "MySQLConnectionPool.h"

#include "mysql++/mysql++.h"
#include <mutex>


namespace zilliz {
namespace milvus {
namespace engine {
namespace meta {

//    auto StoragePrototype(const std::string& path);
using namespace mysqlpp;

class MySQLMetaImpl : public Meta {
 public:
    MySQLMetaImpl(const DBMetaOptions &options_, const int &mode);

    Status CreateTable(TableSchema &table_schema) override;
    Status DescribeTable(TableSchema &group_info_) override;
    Status HasTable(const std::string &table_id, bool &has_or_not) override;
    Status AllTables(std::vector<TableSchema> &table_schema_array) override;

    Status DeleteTable(const std::string &table_id) override;
    Status DeleteTableFiles(const std::string &table_id) override;

    Status CreateTableFile(TableFileSchema &file_schema) override;
    Status DropPartitionsByDates(const std::string &table_id,
                                 const DatesT &dates) override;

    Status GetTableFiles(const std::string &table_id,
                         const std::vector<size_t> &ids,
                         TableFilesSchema &table_files) override;

    Status HasNonIndexFiles(const std::string &table_id, bool &has) override;

    Status UpdateTableFile(TableFileSchema &file_schema) override;

    Status UpdateTableFilesToIndex(const std::string &table_id) override;

    Status UpdateTableFiles(TableFilesSchema &files) override;

    Status FilesToSearch(const std::string &table_id,
                         const DatesT &partition,
                         DatePartionedTableFilesSchema &files) override;

    Status FilesToMerge(const std::string &table_id,
                        DatePartionedTableFilesSchema &files) override;

    Status FilesToIndex(TableFilesSchema &) override;

    Status Archive() override;

    Status Size(uint64_t &result) override;

    Status CleanUp() override;

    Status CleanUpFilesWithTTL(uint16_t seconds) override;

    Status DropAll() override;

    Status Count(const std::string &table_id, uint64_t &result) override;

    virtual ~MySQLMetaImpl();

 private:
    Status NextFileId(std::string &file_id);
    Status NextTableId(std::string &table_id);
    Status DiscardFiles(long long to_discard_size);
    Status Initialize();

    const DBMetaOptions options_;
    const int mode_;

    std::shared_ptr<MySQLConnectionPool> mysql_connection_pool_;
    bool safe_grab = false;

//        std::mutex connectionMutex_;
}; // DBMetaImpl

} // namespace meta
} // namespace engine
} // namespace milvus
} // namespace zilliz