/*
 * Copyright (C) 2018 ScyllaDB
 */

/*
 * This file is part of Scylla.
 *
 * Scylla is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Scylla is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once


#include <seastar/core/future.hh>
#include <seastar/core/distributed.hh>
#include <seastar/core/sstring.hh>
#include <seastar/core/file.hh>
#include <vector>
#include <functional>
#include "seastarx.hh"

class database;
class table;
using column_family = table;
namespace db {
class system_distributed_keyspace;
namespace view {
class view_update_generator;
}
}

namespace sstables {

class entry_descriptor;
class foreign_sstable_open_info;

}

namespace service {

class storage_proxy;

}

class distributed_loader {
public:
    static void reshard(distributed<database>& db, sstring ks_name, sstring cf_name);
    static future<> open_sstable(distributed<database>& db, sstables::entry_descriptor comps,
        std::function<future<> (column_family&, sstables::foreign_sstable_open_info)> func,
        const io_priority_class& pc = default_priority_class());
    static future<> load_new_sstables(distributed<database>& db, distributed<db::view::view_update_generator>& view_update_generator,
            sstring ks, sstring cf, std::vector<sstables::entry_descriptor> new_tables);
    static future<std::vector<sstables::entry_descriptor>> flush_upload_dir(distributed<database>& db, distributed<db::system_distributed_keyspace>& sys_dist_ks, sstring ks_name, sstring cf_name);
    static future<sstables::entry_descriptor> probe_file(distributed<database>& db, sstring sstdir, sstring fname);
    static future<> populate_column_family(distributed<database>& db, sstring sstdir, sstring ks, sstring cf);
    static future<> populate_keyspace(distributed<database>& db, sstring datadir, sstring ks_name);
    static future<> init_system_keyspace(distributed<database>& db);
    static future<> ensure_system_table_directories(distributed<database>& db);
    static future<> init_non_system_keyspaces(distributed<database>& db, distributed<service::storage_proxy>& proxy);
private:
    static future<> cleanup_column_family_temp_sst_dirs(sstring sstdir);
    static future<> handle_sstables_pending_delete(sstring pending_deletes_dir);
    static future<> do_populate_column_family(distributed<database>& db, sstring sstdir, sstring ks, sstring cf);
};