/*
 * Copyright (C) 2019 pengjian.uestc @ gmail.com
 */

/*
 * 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/shared_ptr.hh"
#include "seastar/core/sharded.hh"

#include "protocol_server.hh"

namespace db {
class config;
};

namespace redis {
class query_processor;
}

namespace redis_transport {
class redis_server;
}

namespace auth {
class service;
}

namespace service {
class storage_proxy;
class migration_manager;
}

namespace gms {
class gossiper;
}

namespace replica {
class database;
}

namespace redis {

// As defined in: https://redis.io/topics/protocol
// "The RESP protocol was introduced in Redis 1.2, but it became the standard way
// for talking with the Redis server in Redis 2.0. This is the protocol you
// should implement in your Redis client."
// The protocol itself doesn't seem to have a version, but it was stabilized in
// Redis 2.0 according to the above quite so that is the version we are going to use.
constexpr const char* version = "2.0";

class controller : public protocol_server {
    seastar::sharded<redis::query_processor> _query_processor;
    seastar::shared_ptr<seastar::sharded<redis_transport::redis_server>> _server;
    seastar::sharded<service::storage_proxy>& _proxy;
    seastar::sharded<auth::service>& _auth_service;
    seastar::sharded<service::migration_manager>& _mm;
    db::config& _cfg;
    seastar::sharded<gms::gossiper>& _gossiper;
    std::vector<socket_address> _listen_addresses;
private:
    seastar::future<> listen(seastar::sharded<auth::service>& auth_service, db::config& cfg);
public:
    controller(seastar::sharded<service::storage_proxy>& proxy, seastar::sharded<auth::service>& auth_service,
            seastar::sharded<service::migration_manager>& mm, db::config& cfg, seastar::sharded<gms::gossiper>& gossiper);
    ~controller();
    virtual sstring name() const override;
    virtual sstring protocol() const override;
    virtual sstring protocol_version() const override;
    virtual std::vector<socket_address> listen_addresses() const override;
    virtual future<> start_server() override;
    virtual future<> stop_server() override;
    virtual future<> request_stop_server() override;
};

}