/*
 * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
 *
 * This program 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.
 *
 * 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 General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

/* ScriptData
Name: server_commandscript
%Complete: 100
Comment: All server related commands
Category: commandscripts
EndScriptData */

#include "AvgDiffTracker.h"
#include "Chat.h"
#include "Config.h"
#include "GitRevision.h"
#include "Language.h"
#include "MySQLThreading.h"
#include "Player.h"
#include "Realm.h"
#include "ScriptMgr.h"
#include "ServerMotd.h"
#include "StringConvert.h"
#include "VMapFactory.h"
#include "VMapMgr2.h"
#include <filesystem>
#include <boost/version.hpp>
#include <openssl/crypto.h>
#include <openssl/opensslv.h>
#include <numeric>

#if AC_COMPILER == AC_COMPILER_GNU
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif

using namespace Acore::ChatCommands;

class server_commandscript : public CommandScript
{
public:
    server_commandscript() : CommandScript("server_commandscript") { }

    ChatCommandTable GetCommands() const override
    {
        static ChatCommandTable serverIdleRestartCommandTable =
        {
            { "cancel", SEC_ADMINISTRATOR,  true,  &HandleServerShutDownCancelCommand,      "" },
            { "",       SEC_CONSOLE,        true,  &HandleServerIdleRestartCommand,         "" }
        };

        static ChatCommandTable serverIdleShutdownCommandTable =
        {
            { "cancel", SEC_ADMINISTRATOR,  true,  &HandleServerShutDownCancelCommand,      "" },
            { "",       SEC_CONSOLE,        true,  &HandleServerIdleShutDownCommand,        "" }
        };

        static ChatCommandTable serverRestartCommandTable =
        {
            { "cancel", SEC_ADMINISTRATOR,  true,  &HandleServerShutDownCancelCommand,      "" },
            { "",       SEC_ADMINISTRATOR,  true,  &HandleServerRestartCommand,             "" }
        };

        static ChatCommandTable serverShutdownCommandTable =
        {
            { "cancel", SEC_ADMINISTRATOR,  true,  &HandleServerShutDownCancelCommand,      "" },
            { "",       SEC_ADMINISTRATOR,  true,  &HandleServerShutDownCommand,            "" }
        };

        static ChatCommandTable serverSetCommandTable =
        {
            { "difftime",       SEC_CONSOLE,        true,  &HandleServerSetDiffTimeCommand,         "" },
            { "loglevel",       SEC_CONSOLE,        true,  &HandleServerSetLogLevelCommand,         "" },
            { "motd",           SEC_ADMINISTRATOR,  true,  &HandleServerSetMotdCommand,             "" },
            { "closed",         SEC_CONSOLE,        true,  &HandleServerSetClosedCommand,           "" }
        };

        static ChatCommandTable serverCommandTable =
        {
            { "corpses",        SEC_GAMEMASTER,     true,  &HandleServerCorpsesCommand,             "" },
            { "debug",          SEC_ADMINISTRATOR,  true,  &HandleServerDebugCommand,               "" },
            { "exit",           SEC_CONSOLE,        true,  &HandleServerExitCommand,                "" },
            { "idlerestart",    SEC_CONSOLE,        true,  nullptr,                                 "", serverIdleRestartCommandTable },
            { "idleshutdown",   SEC_CONSOLE,        true,  nullptr,                                 "", serverIdleShutdownCommandTable },
            { "info",           SEC_PLAYER,         true,  &HandleServerInfoCommand,                "" },
            { "motd",           SEC_PLAYER,         true,  &HandleServerMotdCommand,                "" },
            { "restart",        SEC_ADMINISTRATOR,  true,  nullptr,                                 "", serverRestartCommandTable },
            { "shutdown",       SEC_ADMINISTRATOR,  true,  nullptr,                                 "", serverShutdownCommandTable },
            { "set",            SEC_ADMINISTRATOR,  true,  nullptr,                                 "", serverSetCommandTable }
        };

        static ChatCommandTable commandTable =
        {
            { "server",         SEC_PLAYER,         true,  nullptr,                                 "", serverCommandTable }
        };

        return commandTable;
    }

    // Triggering corpses expire check in world
    static bool HandleServerCorpsesCommand(ChatHandler* /*handler*/, char const* /*args*/)
    {
        sWorld->RemoveOldCorpses();
        return true;
    }

    static bool HandleServerDebugCommand(ChatHandler* handler, char const* /*args*/)
    {
        uint16 worldPort = uint16(sWorld->getIntConfig(CONFIG_PORT_WORLD));
        std::string dbPortOutput;

        {
            uint16 dbPort = 0;
            if (QueryResult res = LoginDatabase.PQuery("SELECT port FROM realmlist WHERE id = %u", realm.Id.Realm))
                dbPort = (*res)[0].GetUInt16();

            if (dbPort)
                dbPortOutput = Acore::StringFormat("Realmlist (Realm Id: %u) configured in port %" PRIu16, realm.Id.Realm, dbPort);
            else
                dbPortOutput = Acore::StringFormat("Realm Id: %u not found in `realmlist` table. Please check your setup", realm.Id.Realm);
        }

        handler->PSendSysMessage("%s", GitRevision::GetFullVersion());
        handler->PSendSysMessage("Using SSL version: %s (library: %s)", OPENSSL_VERSION_TEXT, SSLeay_version(SSLEAY_VERSION));
        handler->PSendSysMessage("Using Boost version: %i.%i.%i", BOOST_VERSION / 100000, BOOST_VERSION / 100 % 1000, BOOST_VERSION % 100);
        handler->PSendSysMessage("Using MySQL version: %u", MySQL::GetLibraryVersion());
        handler->PSendSysMessage("Using CMake version: %s", GitRevision::GetCMakeVersion());

        handler->PSendSysMessage("Compiled on: %s", GitRevision::GetHostOSVersion());

        handler->PSendSysMessage("Worldserver listening connections on port %" PRIu16, worldPort);
        handler->PSendSysMessage("%s", dbPortOutput.c_str());

        bool vmapIndoorCheck = sWorld->getBoolConfig(CONFIG_VMAP_INDOOR_CHECK);
        bool vmapLOSCheck = VMAP::VMapFactory::createOrGetVMapMgr()->isLineOfSightCalcEnabled();
        bool vmapHeightCheck = VMAP::VMapFactory::createOrGetVMapMgr()->isHeightCalcEnabled();

        bool mmapEnabled = sWorld->getBoolConfig(CONFIG_ENABLE_MMAPS);

        std::string dataDir = sWorld->GetDataPath();
        std::vector<std::string> subDirs;
        subDirs.emplace_back("maps");
        if (vmapIndoorCheck || vmapLOSCheck || vmapHeightCheck)
        {
            handler->PSendSysMessage("VMAPs status: Enabled. LineOfSight: %i, getHeight: %i, indoorCheck: %i", vmapLOSCheck, vmapHeightCheck, vmapIndoorCheck);
            subDirs.emplace_back("vmaps");
        }
        else
            handler->SendSysMessage("VMAPs status: Disabled");

        if (mmapEnabled)
        {
            handler->SendSysMessage("MMAPs status: Enabled");
            subDirs.emplace_back("mmaps");
        }
        else
            handler->SendSysMessage("MMAPs status: Disabled");

        for (std::string const& subDir : subDirs)
        {
            std::filesystem::path mapPath(dataDir);
            mapPath /= subDir;

            if (!std::filesystem::exists(mapPath))
            {
                handler->PSendSysMessage("%s directory doesn't exist!. Using path: %s", subDir.c_str(), mapPath.generic_string().c_str());
                continue;
            }

            auto end = std::filesystem::directory_iterator();
            std::size_t folderSize = std::accumulate(std::filesystem::directory_iterator(mapPath), end, std::size_t(0), [](std::size_t val, std::filesystem::path const& mapFile)
            {
                if (std::filesystem::is_regular_file(mapFile))
                    val += std::filesystem::file_size(mapFile);
                return val;
            });

            handler->PSendSysMessage("%s directory located in %s. Total size: " SZFMTD " bytes", subDir.c_str(), mapPath.generic_string().c_str(), folderSize);
        }

        LocaleConstant defaultLocale = sWorld->GetDefaultDbcLocale();
        uint32 availableLocalesMask = (1 << defaultLocale);

        for (uint8 i = 0; i < TOTAL_LOCALES; ++i)
        {
            LocaleConstant locale = static_cast<LocaleConstant>(i);
            if (locale == defaultLocale)
                continue;

            if (sWorld->GetAvailableDbcLocale(locale) != defaultLocale)
                availableLocalesMask |= (1 << locale);
        }

        std::string availableLocales;
        for (uint8 i = 0; i < TOTAL_LOCALES; ++i)
        {
            if (!(availableLocalesMask & (1 << i)))
                continue;

            availableLocales += localeNames[i];
            if (i != TOTAL_LOCALES - 1)
                availableLocales += " ";
        }

        handler->PSendSysMessage("Using %s DBC Locale as default. All available DBC locales: %s", localeNames[defaultLocale], availableLocales.c_str());

        handler->PSendSysMessage("Using World DB: %s", sWorld->GetDBVersion());
        handler->PSendSysMessage("Using World DB Revision: %s", sWorld->GetWorldDBRevision());
        handler->PSendSysMessage("Using Character DB Revision: %s", sWorld->GetCharacterDBRevision());
        handler->PSendSysMessage("Using Auth DB Revision: %s", sWorld->GetAuthDBRevision());
        return true;
    }

    static bool HandleServerInfoCommand(ChatHandler* handler, char const* /*args*/)
    {
        std::string realmName = sWorld->GetRealmName();
        uint32 playerCount = sWorld->GetPlayerCount();
        uint32 activeSessionCount = sWorld->GetActiveSessionCount();
        uint32 queuedSessionCount = sWorld->GetQueuedSessionCount();
        uint32 connPeak = sWorld->GetMaxActiveSessionCount();
        std::string uptime = secsToTimeString(sWorld->GetUptime()).append(".");
        uint32 updateTime = sWorld->GetUpdateTime();
        uint32 avgUpdateTime = avgDiffTracker.getAverage();

        handler->PSendSysMessage("%s", GitRevision::GetFullVersion());
        if (!queuedSessionCount)
            handler->PSendSysMessage("Connected players: %u. Characters in world: %u.", activeSessionCount, playerCount);
        else
            handler->PSendSysMessage("Connected players: %u. Characters in world: %u. Queue: %u.", activeSessionCount, playerCount, queuedSessionCount);
        handler->PSendSysMessage("Connection peak: %u.", connPeak);
        handler->PSendSysMessage(LANG_UPTIME, uptime.c_str());
        handler->PSendSysMessage("Update time diff: %ums, average: %ums.", updateTime, avgUpdateTime);

        if (handler->GetSession())
            if (Player* p = handler->GetSession()->GetPlayer())
                if (p->IsDeveloper())
                    handler->PSendSysMessage("DEV wavg: %ums, nsmax: %ums, nsavg: %ums. LFG avg: %ums, max: %ums.", avgDiffTracker.getTimeWeightedAverage(), devDiffTracker.getMax(), devDiffTracker.getAverage(), lfgDiffTracker.getAverage(), lfgDiffTracker.getMax());

        //! Can't use sWorld->ShutdownMsg here in case of console command
        if (sWorld->IsShuttingDown())
            handler->PSendSysMessage(LANG_SHUTDOWN_TIMELEFT, secsToTimeString(sWorld->GetShutDownTimeLeft()).append(".").c_str());

        return true;
    }
    // Display the 'Message of the day' for the realm
    static bool HandleServerMotdCommand(ChatHandler* handler, char const* /*args*/)
    {
        handler->PSendSysMessage(LANG_MOTD_CURRENT, Motd::GetMotd());
        return true;
    }

    static bool HandleServerShutDownCancelCommand(ChatHandler* /*handler*/, char const* /*args*/)
    {
        sWorld->ShutdownCancel();

        return true;
    }

    static bool HandleServerShutDownCommand(ChatHandler* /*handler*/, char const* args)
    {
        if (!*args)
            return false;

        char* timeStr = strtok((char*) args, " ");
        char* exitCodeStr = strtok(nullptr, "");

        int32 time = atoi(timeStr);

        // Prevent interpret wrong arg value as 0 secs shutdown time
        if ((time == 0 && (timeStr[0] != '0' || timeStr[1] != '\0')) || time < 0)
            return false;

        if (exitCodeStr)
        {
            int32 exitCode = atoi(exitCodeStr);

            // Handle atoi() errors
            if (exitCode == 0 && (exitCodeStr[0] != '0' || exitCodeStr[1] != '\0'))
                return false;

            // Exit code should be in range of 0-125, 126-255 is used
            // in many shells for their own return codes and code > 255
            // is not supported in many others
            if (exitCode < 0 || exitCode > 125)
                return false;

            sWorld->ShutdownServ(time, 0, exitCode);
        }
        else
            sWorld->ShutdownServ(time, 0, SHUTDOWN_EXIT_CODE);

        return true;
    }

    static bool HandleServerRestartCommand(ChatHandler* /*handler*/, char const* args)
    {
        if (!*args)
            return false;

        char* timeStr = strtok((char*) args, " ");
        char* exitCodeStr = strtok(nullptr, "");

        int32 time = atoi(timeStr);

        //  Prevent interpret wrong arg value as 0 secs shutdown time
        if ((time == 0 && (timeStr[0] != '0' || timeStr[1] != '\0')) || time < 0)
            return false;

        if (exitCodeStr)
        {
            int32 exitCode = atoi(exitCodeStr);

            // Handle atoi() errors
            if (exitCode == 0 && (exitCodeStr[0] != '0' || exitCodeStr[1] != '\0'))
                return false;

            // Exit code should be in range of 0-125, 126-255 is used
            // in many shells for their own return codes and code > 255
            // is not supported in many others
            if (exitCode < 0 || exitCode > 125)
                return false;

            sWorld->ShutdownServ(time, SHUTDOWN_MASK_RESTART, exitCode);
        }
        else
            sWorld->ShutdownServ(time, SHUTDOWN_MASK_RESTART, RESTART_EXIT_CODE);

        return true;
    }

    static bool HandleServerIdleRestartCommand(ChatHandler* /*handler*/, char const* args)
    {
        if (!*args)
            return false;

        char* timeStr = strtok((char*) args, " ");
        char* exitCodeStr = strtok(nullptr, "");

        int32 time = atoi(timeStr);

        // Prevent interpret wrong arg value as 0 secs shutdown time
        if ((time == 0 && (timeStr[0] != '0' || timeStr[1] != '\0')) || time < 0)
            return false;

        if (exitCodeStr)
        {
            int32 exitCode = atoi(exitCodeStr);

            // Handle atoi() errors
            if (exitCode == 0 && (exitCodeStr[0] != '0' || exitCodeStr[1] != '\0'))
                return false;

            // Exit code should be in range of 0-125, 126-255 is used
            // in many shells for their own return codes and code > 255
            // is not supported in many others
            if (exitCode < 0 || exitCode > 125)
                return false;

            sWorld->ShutdownServ(time, SHUTDOWN_MASK_RESTART | SHUTDOWN_MASK_IDLE, exitCode);
        }
        else
            sWorld->ShutdownServ(time, SHUTDOWN_MASK_RESTART | SHUTDOWN_MASK_IDLE, RESTART_EXIT_CODE);
        return true;
    }

    static bool HandleServerIdleShutDownCommand(ChatHandler* /*handler*/, char const* args)
    {
        if (!*args)
            return false;

        char* timeStr = strtok((char*) args, " ");
        char* exitCodeStr = strtok(nullptr, "");

        int32 time = atoi(timeStr);

        // Prevent interpret wrong arg value as 0 secs shutdown time
        if ((time == 0 && (timeStr[0] != '0' || timeStr[1] != '\0')) || time < 0)
            return false;

        if (exitCodeStr)
        {
            int32 exitCode = atoi(exitCodeStr);

            // Handle atoi() errors
            if (exitCode == 0 && (exitCodeStr[0] != '0' || exitCodeStr[1] != '\0'))
                return false;

            // Exit code should be in range of 0-125, 126-255 is used
            // in many shells for their own return codes and code > 255
            // is not supported in many others
            if (exitCode < 0 || exitCode > 125)
                return false;

            sWorld->ShutdownServ(time, SHUTDOWN_MASK_IDLE, exitCode);
        }
        else
            sWorld->ShutdownServ(time, SHUTDOWN_MASK_IDLE, SHUTDOWN_EXIT_CODE);
        return true;
    }

    // Exit the realm
    static bool HandleServerExitCommand(ChatHandler* handler, char const* /*args*/)
    {
        handler->SendSysMessage(LANG_COMMAND_EXIT);
        World::StopNow(SHUTDOWN_EXIT_CODE);
        return true;
    }

    // Define the 'Message of the day' for the realm
    static bool HandleServerSetMotdCommand(ChatHandler* handler, char const* args)
    {
        Motd::SetMotd(args);
        handler->PSendSysMessage(LANG_MOTD_NEW, args);
        return true;
    }

    // Set whether we accept new clients
    static bool HandleServerSetClosedCommand(ChatHandler* handler, char const* args)
    {
        if (strncmp(args, "on", 3) == 0)
        {
            handler->SendSysMessage(LANG_WORLD_CLOSED);
            sWorld->SetClosed(true);
            return true;
        }
        else if (strncmp(args, "off", 4) == 0)
        {
            handler->SendSysMessage(LANG_WORLD_OPENED);
            sWorld->SetClosed(false);
            return true;
        }

        handler->SendSysMessage(LANG_USE_BOL);
        handler->SetSentErrorMessage(true);
        return false;
    }

    // Set the level of logging
    static bool HandleServerSetLogLevelCommand(ChatHandler* /*handler*/, char const* args)
    {
       if (!*args)
            return false;

        char* type = strtok((char*)args, " ");
        char* name = strtok(nullptr, " ");
        char* level = strtok(nullptr, " ");

        if (!type || !name || !level || *name == '\0' || *level == '\0' || (*type != 'a' && *type != 'l'))
            return false;

        sLog->SetLogLevel(name, *Acore::StringTo<uint32>(level), *type == 'l');
        return true;
    }

    // set diff time record interval
    static bool HandleServerSetDiffTimeCommand(ChatHandler* /*handler*/, char const* args)
    {
        if (!*args)
            return false;

        char* newTimeStr = strtok((char*)args, " ");
        if (!newTimeStr)
            return false;

        int32 newTime = atoi(newTimeStr);
        if (newTime < 0)
            return false;

        sWorld->SetRecordDiffInterval(newTime);
        printf("Record diff every %u ms\n", newTime);

        return true;
    }
};

void AddSC_server_commandscript()
{
    new server_commandscript();
}