/*    Copyright 2013 10gen Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    This program 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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects
 *    for all of the code used other than as permitted herein. If you modify
 *    file(s) with this exception, you may extend this exception to your
 *    version of the file(s), but you are not obligated to do so. If you do not
 *    wish to do so, delete this exception statement from your version. If you
 *    delete this exception statement from all source files in the program,
 *    then also delete it in the license file.
 */

#pragma once

#include "mongo/db/jsobj.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/platform/process_id.h"
#include "mongo/s/catalog/sharding_catalog_client.h"

// TODO(SERVER-29687) Remove this include. A bunch of places assume they can call
// getHostName()/getHostNameCached() by including server_options.h.
#include "mongo/util/net/sock.h"

namespace mongo {

const int DEFAULT_UNIX_PERMS = 0700;
constexpr auto DEFAULT_MAX_CONN = 1000000;

enum class ClusterRole { None, ShardServer, ConfigServer };

struct ServerGlobalParams {
    std::string binaryName;  // mongod or mongos
    std::string cwd;         // cwd of when process started

    int port = DefaultDBPort;  // --port
    enum { DefaultDBPort = 27017, ConfigServerPort = 27019, ShardServerPort = 27018 };
    bool isDefaultPort() const {
        return port == DefaultDBPort;
    }

    std::string bind_ip;  // --bind_ip
    bool enableIPv6 = false;
    bool rest = false;  // --rest

    bool indexBuildRetry = true;  // --noIndexBuildRetry

    AtomicBool quiet{false};  // --quiet

    ClusterRole clusterRole = ClusterRole::None;  // --configsvr/--shardsvr

    bool cpu = false;  // --cpu show cpu time periodically

    bool objcheck = true;  // --objcheck

    int defaultProfile = 0;                // --profile
    int slowMS = 100;                      // --time in ms that is "slow"
    double sampleRate = 1.0;               // --samplerate rate at which to sample slow queries
    int defaultLocalThresholdMillis = 15;  // --localThreshold in ms to consider a node local
    bool moveParanoia = false;             // for move chunk paranoia

    bool noUnixSocket = false;    // --nounixsocket
    bool doFork = false;          // --fork
    std::string socket = "/tmp";  // UNIX domain socket directory
    std::string transportLayer;   // --transportLayer (must be either "asio" or "legacy")

    // --serviceExecutor ("adaptive", "synchronous", or "fixedForTesting")
    std::string serviceExecutor;

    int maxConns = DEFAULT_MAX_CONN;  // Maximum number of simultaneous open connections.

    int unixSocketPermissions = DEFAULT_UNIX_PERMS;  // permissions for the UNIX domain socket

    std::string keyFile;           // Path to keyfile, or empty if none.
    std::string pidFile;           // Path to pid file, or empty if none.
    std::string timeZoneInfoPath;  // Path to time zone info directory, or empty if none.

    std::string logpath;            // Path to log file, if logging to a file; otherwise, empty.
    bool logAppend = false;         // True if logging to a file in append mode.
    bool logRenameOnRotate = true;  // True if logging should rename log files on rotate
    bool logWithSyslog = false;     // True if logging to syslog; must not be set if logpath is set.
    int syslogFacility;             // Facility used when appending messages to the syslog.

#ifndef _WIN32
    ProcessId parentProc;  // --fork pid of initial process
    ProcessId leaderProc;  // --fork pid of leader process
#endif

    /**
     * Switches to enable experimental (unsupported) features.
     */
    struct ExperimentalFeatures {
        ExperimentalFeatures() : storageDetailsCmdEnabled(false) {}
        bool storageDetailsCmdEnabled;  // -- enableExperimentalStorageDetailsCmd
    } experimental;

    time_t started = ::time(0);

    BSONArray argvArray;
    BSONObj parsedOpts;

    enum AuthState { kEnabled, kDisabled, kUndefined };

    AuthState authState = AuthState::kUndefined;

    bool transitionToAuth = false;  // --transitionToAuth, mixed mode for rolling auth upgrade
    AtomicInt32 clusterAuthMode;    // --clusterAuthMode, the internal cluster auth mode

    enum ClusterAuthModes {
        ClusterAuthMode_undefined,
        /**
        * Authenticate using keyfile, accept only keyfiles
        */
        ClusterAuthMode_keyFile,

        /**
        * Authenticate using keyfile, accept both keyfiles and X.509
        */
        ClusterAuthMode_sendKeyFile,

        /**
        * Authenticate using X.509, accept both keyfiles and X.509
        */
        ClusterAuthMode_sendX509,

        /**
        * Authenticate using X.509, accept only X.509
        */
        ClusterAuthMode_x509
    };

    // for the YAML config, sharding._overrideShardIdentity. Can only be used when in
    // queryableBackupMode.
    BSONObj overrideShardIdentity;

    struct FeatureCompatibility {
        enum class Version {
            /**
             * In this mode, the cluster will expose a 3.4-like API. Attempts by a client to use new
             * features in 3.6 will be rejected.
             */
            k34,

            /**
             * In this mode, new features in 3.6 are allowed. The system should guarantee that no
             * 3.4 node can participate in a cluster whose feature compatibility version is 3.6.
             */
            k36,
        };

        // Read-only parameter featureCompatibilityVersion.
        AtomicWord<Version> version{Version::k34};

        // Read-only global isSchemaVersion36. This determines whether to give Collections UUIDs
        // upon creation.
        AtomicWord<bool> isSchemaVersion36{false};

        // Feature validation differs depending on the role of a mongod in a replica set or
        // master/slave configuration. Masters/primaries can accept user-initiated writes and
        // validate based on the feature compatibility version. A secondary/slave (which is not also
        // a master) always validates in "3.4" mode so that it can sync 3.4 features, even when in
        // "3.2" feature compatibility mode.
        AtomicWord<bool> validateFeaturesAsMaster{true};
    } featureCompatibility;
};

extern ServerGlobalParams serverGlobalParams;
}