//
// Copyright (C) 2018 Codership Oy <info@codership.com>
//

#ifndef WSREP_DB_SIMULATOR_HPP
#define WSREP_DB_SIMULATOR_HPP

#include "wsrep/gtid.hpp"
#include "wsrep/mutex.hpp"
#include "wsrep/lock.hpp"

#include "db_params.hpp"
#include "db_server.hpp"

#include <memory>
#include <chrono>
#include <unordered_set>
#include <map>

namespace db
{
    class server;
    class simulator
    {
    public:
        simulator(const params& params)
            : mutex_()
            , params_(params)
            , servers_()
            , clients_start_()
            , clients_stop_()
            , stats_()
        { }

        void start();
        void stop();
        void sst(db::server&,
                 const std::string&, const wsrep::gtid&, bool);
        const db::params& params() const
        { return params_; }
        std::string stats() const;
    private:
        std::string server_port(size_t i) const;
        std::string build_cluster_address() const;

        wsrep::default_mutex mutex_;
        const db::params& params_;
        std::map<size_t, std::unique_ptr<db::server>> servers_;
        std::chrono::time_point<std::chrono::steady_clock> clients_start_;
        std::chrono::time_point<std::chrono::steady_clock> clients_stop_;
    public:
        struct stats
        {
            long long commits;
            long long aborts;
            long long replays;
            stats()
                : commits(0)
                , aborts(0)
                , replays(0)
            { }
        } stats_;
    };
}
#endif // WSRE_DB_SIMULATOR_HPP