/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *   Copyright 2020-Present Couchbase, Inc.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

#pragma once

#include "ip_protocol.hxx"

#include <cstdint>
#include <optional>
#include <string>

namespace couchbase
{
class network_options
{
  public:
    static constexpr std::chrono::milliseconds default_tcp_keep_alive_interval{ std::chrono::seconds{ 60 } };
    static constexpr std::chrono::milliseconds default_config_poll_interval{ 2'500 };
    static constexpr std::chrono::milliseconds default_config_poll_floor{ 50 };
    static constexpr std::chrono::milliseconds default_idle_http_connection_timeout{ 4'500 };

    auto preferred_network(std::string network_name) -> network_options&
    {
        network_ = network_name;
        return *this;
    }

    auto enable_tcp_keep_alive(bool enable) -> network_options&
    {
        enable_tcp_keep_alive_ = enable;
        return *this;
    }

    auto tcp_keep_alive_interval(std::chrono::milliseconds interval) -> network_options&
    {
        tcp_keep_alive_interval_ = interval;
        return *this;
    }

    auto config_poll_interval(std::chrono::milliseconds interval) -> network_options&
    {
        if (interval < config_poll_floor_) {
            interval = config_poll_floor_;
        }
        config_poll_interval_ = interval;
        return *this;
    }

    auto idle_http_connection_timeout(std::chrono::milliseconds timeout) -> network_options&
    {
        idle_http_connection_timeout_ = timeout;
        return *this;
    }

    auto max_http_connections(std::size_t number_of_connections) -> network_options&
    {
        max_http_connections_ = number_of_connections;
        return *this;
    }

    auto force_ip_protocol(ip_protocol protocol) -> network_options&
    {
        ip_protocol_ = protocol;
        return *this;
    }

    struct built {
        std::string network;
        bool enable_tcp_keep_alive;
        couchbase::ip_protocol ip_protocol;
        std::chrono::milliseconds tcp_keep_alive_interval;
        std::chrono::milliseconds config_poll_interval;
        std::chrono::milliseconds idle_http_connection_timeout;
        std::optional<std::size_t> max_http_connections;
    };

    [[nodiscard]] auto build() const -> built
    {
        return {
            network_,
            enable_tcp_keep_alive_,
            ip_protocol_,
            tcp_keep_alive_interval_,
            config_poll_interval_,
            idle_http_connection_timeout_,
            max_http_connections_,
        };
    }

  private:
    std::string network_{ "auto" };
    bool enable_tcp_keep_alive_{ true };
    ip_protocol ip_protocol_{ ip_protocol::any };
    std::chrono::milliseconds tcp_keep_alive_interval_{ default_tcp_keep_alive_interval };
    std::chrono::milliseconds config_poll_interval_{ default_config_poll_interval };
    std::chrono::milliseconds config_poll_floor_{ default_config_poll_floor };
    std::chrono::milliseconds idle_http_connection_timeout_{ default_idle_http_connection_timeout };
    std::optional<std::size_t> max_http_connections_{};
};
} // namespace couchbase