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/*
 * Copyright (C) 2010-2012 SkyNeT Entertainment <http://www.skynet.at.ua/>
 * Copyright (C) 2010-2012 SkyNeT Entertainment <http://skynet.at.ua/>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 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 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/>.
 */
 
 
 
#include <ace/Sig_Handler.h>
 
#include "Common.h"
#include "SystemConfig.h"
#include "SignalHandler.h"
#include "World.h"
#include "WorldRunnable.h"
#include "WorldSocket.h"
#include "WorldSocketMgr.h"
#include "Configuration/Config.h"
#include "Database/DatabaseEnv.h"
#include "Database/DatabaseWorkerPool.h"
 
#include "CliRunnable.h"
#include "Log.h"
#include "Master.h"
#include "RARunnable.h"
#include "TCSoap.h"
#include "Timer.h"
#include "Util.h"
#include "AuthSocket.h"
 
#include "BigNumber.h"
 
#ifdef _WIN32
#include "ServiceWin32.h"
extern int m_ServiceStatus;
#endif
 
/// Handle worldservers's termination signals
class WorldServerSignalHandler : public Trinity::SignalHandler
{
    public:
        virtual void HandleSignal(int SigNum)
        {
            switch (SigNum)
            {
                case SIGINT:
                    World::StopNow(RESTART_EXIT_CODE);
                    break;
                case SIGTERM:
                #ifdef _WIN32
                case SIGBREAK:
                    if (m_ServiceStatus != 1)
                #endif /* _WIN32 */
                    World::StopNow(SHUTDOWN_EXIT_CODE);
                    break;
            }
        }
};
 
class FreezeDetectorRunnable : public ACE_Based::Runnable
{
public:
    FreezeDetectorRunnable() { _delaytime = 0; }
    uint32 m_loops, m_lastchange;
    uint32 w_loops, w_lastchange;
    uint32 _delaytime;
    void SetDelayTime(uint32 t) { _delaytime = t; }
    void run(void)
    {
        if (!_delaytime)
            return;
        sLog->outString("Starting up anti-freeze thread (%u seconds max stuck time)...", _delaytime/1000);
        m_loops = 0;
        w_loops = 0;
        m_lastchange = 0;
        w_lastchange = 0;
        while (!World::IsStopped())
        {
            ACE_Based::Thread::Sleep(1000);
            uint32 curtime = getMSTime();
            // normal work
            if (w_loops != World::m_worldLoopCounter)
            {
                w_lastchange = curtime;
                w_loops = World::m_worldLoopCounter;
            }
            // possible freeze
            else if (getMSTimeDiff(w_lastchange, curtime) > _delaytime)
            {
                sLog->outError("World Thread hangs, kicking out server!");
                ASSERT(false);
            }
        }
        sLog->outString("Anti-freeze thread exiting without problems.");
    }
};
 
Master::Master()
{
}
 
Master::~Master()
{
}
 
/// Main function
int Master::Run()
{
    BigNumber seed1;
    seed1.SetRand(16 * 8);
 
               system("color 05");
               sLog->outString("<Ctrl-C> to stop.\n");
               sLog->outString("VV___VV___VV__________VV___VV___VV___VVVV__VVVVVV");
               sLog->outString("VV___VV___VV__________VV___VV___VV_____VV__VV___VV");
               sLog->outString("VV___VVV__VV___VVVV___VV___VVV__VV_____VV__VV___VV");
               sLog->outString("_V__VVVV__V___VV__VV___V__VVVV__V______VV__VV___VV");
               sLog->outString("_V__V__V__V___VV___V___V__V__V__V______VV__VV___VV");
               sLog->outString("_VV_V__V_VV___V____V___VV_V__V_VV______VV__VVVVVV");
               sLog->outString("_VVVV__VVVV___VV___V___VVVV__VVVV______VV__VV");
               sLog->outString("__VVV__VVV____VV__VV____VVV__VVV_______V___VV");
               sLog->outString("__VV____VV_____VVVV_____VV____VV___ VVVV___VV");
               sLog->outString("________________http://trinity-core.ru____________ ");
               sLog->outString("________________http://vk.com/skynet.team____________ ");
               sLog->outString("________________Project Elifiko & SkyNeT Core____________________");
 
#ifdef USE_SFMT_FOR_RNG
    sLog->outString("\n");
    sLog->outString("SFMT has been enabled as the random number generator, if worldserver");
    sLog->outString("freezes or crashes randomly, first, try disabling SFMT in CMAKE configuration");
    sLog->outString("\n");
#endif //USE_SFMT_FOR_RNG
 
    /// worldserver PID file creation
    std::string pidfile = ConfigMgr::GetStringDefault("PidFile", "");
    if (!pidfile.empty())
    {
        uint32 pid = CreatePIDFile(pidfile);
        if (!pid)
        {
            sLog->outError("Cannot create PID file %s.\n", pidfile.c_str());
            return 1;
        }
 
        
    }
 
    ///- Start the databases
    if (!_StartDB())
        return 1;
 
    // set server offline (not connectable)
    LoginDatabase.DirectPExecute("UPDATE realmlist SET color = (color & ~%u) | %u WHERE id = '%d'", REALM_FLAG_OFFLINE, REALM_FLAG_INVALID, realmID);
 
    ///- Initialize the World
    sWorld->SetInitialWorldSettings();
 
    // Initialise the signal handlers
    WorldServerSignalHandler SignalINT, SignalTERM;
    #ifdef _WIN32
    WorldServerSignalHandler SignalBREAK;
    #endif /* _WIN32 */
 
    // Register worldserver's signal handlers
    ACE_Sig_Handler Handler;
    Handler.register_handler(SIGINT, &SignalINT);
    Handler.register_handler(SIGTERM, &SignalTERM);
    #ifdef _WIN32
    Handler.register_handler(SIGBREAK, &SignalBREAK);
    #endif /* _WIN32 */
 
    ///- Launch WorldRunnable thread
    ACE_Based::Thread world_thread(new WorldRunnable);
    world_thread.setPriority(ACE_Based::Highest);
 
    ACE_Based::Thread* cliThread = NULL;
 
#ifdef _WIN32
    if (ConfigMgr::GetBoolDefault("Console.Enable", true) && (m_ServiceStatus == -1)/* need disable console in service mode*/)
#else
    if (ConfigMgr::GetBoolDefault("Console.Enable", true))
#endif
    {
        ///- Launch CliRunnable thread
        cliThread = new ACE_Based::Thread(new CliRunnable);
    }
 
    ACE_Based::Thread rar_thread(new RARunnable);
 
    ///- Handle affinity for multiple processors and process priority on Windows
    #ifdef _WIN32
    {
        HANDLE hProcess = GetCurrentProcess();
 
        uint32 Aff = ConfigMgr::GetIntDefault("UseProcessors", 0);
        if (Aff > 0)
        {
            ULONG_PTR appAff;
            ULONG_PTR sysAff;
 
            if (GetProcessAffinityMask(hProcess, &appAff, &sysAff))
            {
                ULONG_PTR curAff = Aff & appAff;            // remove non accessible processors
 
                if (!curAff)
                {
                    sLog->outError("Processors marked in UseProcessors bitmask (hex) %x are not accessible for the worldserver. Accessible processors bitmask (hex): %x", Aff, appAff);
                }
                else
                {
                    if (SetProcessAffinityMask(hProcess, curAff))
                        sLog->outString("Using processors (bitmask, hex): %x", curAff);
                    else
                        sLog->outError("Can't set used processors (hex): %x", curAff);
                }
            }
            sLog->outString("");
        }
 
        bool Prio = ConfigMgr::GetBoolDefault("ProcessPriority", false);
 
        //if (Prio && (m_ServiceStatus == -1)  /* need set to default process priority class in service mode*/)
        if (Prio)
        {
            if (SetPriorityClass(hProcess, HIGH_PRIORITY_CLASS))
                sLog->outString("worldserver process priority class set to HIGH");
            else
                sLog->outError("Can't set worldserver process priority class.");
            sLog->outString("");
        }
    }
    #endif
    //Start soap serving thread
    ACE_Based::Thread* soap_thread = NULL;
 
    if (ConfigMgr::GetBoolDefault("SOAP.Enabled", false))
    {
        TCSoapRunnable* runnable = new TCSoapRunnable();
        runnable->setListenArguments(ConfigMgr::GetStringDefault("SOAP.IP", "127.0.0.1"), ConfigMgr::GetIntDefault("SOAP.Port", 7878));
        soap_thread = new ACE_Based::Thread(runnable);
    }
 
    ///- Start up freeze catcher thread
    if (uint32 freeze_delay = ConfigMgr::GetIntDefault("MaxCoreStuckTime", 0))
    {
        FreezeDetectorRunnable* fdr = new FreezeDetectorRunnable();
        fdr->SetDelayTime(freeze_delay*1000);
        ACE_Based::Thread freeze_thread(fdr);
        freeze_thread.setPriority(ACE_Based::Highest);
    }
 
    ///- Launch the world listener socket
    uint16 wsport = sWorld->getIntConfig(CONFIG_PORT_WORLD);
    std::string bind_ip = ConfigMgr::GetStringDefault("BindIP", "0.0.0.0");
 
    if (sWorldSocketMgr->StartNetwork(wsport, bind_ip.c_str ()) == -1)
    {
        sLog->outError("Failed to start network");
        World::StopNow(ERROR_EXIT_CODE);
        // go down and shutdown the server
    }
 
    // set server online (allow connecting now)
    LoginDatabase.DirectPExecute("UPDATE realmlist SET color = color & ~%u, population = 0 WHERE id = '%u'", REALM_FLAG_INVALID, realmID);
 
    
    sWorldSocketMgr->Wait();
 
    if (soap_thread)
    {
        soap_thread->wait();
        soap_thread->destroy();
        delete soap_thread;
    }
 
    // set server offline
    LoginDatabase.DirectPExecute("UPDATE realmlist SET color = color | %u WHERE id = '%d'", REALM_FLAG_OFFLINE, realmID);
 
    // when the main thread closes the singletons get unloaded
    // since worldrunnable uses them, it will crash if unloaded after master
    world_thread.wait();
    rar_thread.wait();
 
    ///- Clean database before leaving
    clearOnlineAccounts();
 
    _StopDB();
 
    sLog->outString("Halting process...");
 
    if (cliThread)
    {
        #ifdef _WIN32
 
        // this only way to terminate CLI thread exist at Win32 (alt. way exist only in Windows Vista API)
        //_exit(1);
        // send keyboard input to safely unblock the CLI thread
        INPUT_RECORD b[5];
        HANDLE hStdIn = GetStdHandle(STD_INPUT_HANDLE);
        b[0].EventType = KEY_EVENT;
        b[0].Event.KeyEvent.bKeyDown = TRUE;
        b[0].Event.KeyEvent.uChar.AsciiChar = 'X';
        b[0].Event.KeyEvent.wVirtualKeyCode = 'X';
        b[0].Event.KeyEvent.wRepeatCount = 1;
 
        b[1].EventType = KEY_EVENT;
        b[1].Event.KeyEvent.bKeyDown = FALSE;
        b[1].Event.KeyEvent.uChar.AsciiChar = 'X';
        b[1].Event.KeyEvent.wVirtualKeyCode = 'X';
        b[1].Event.KeyEvent.wRepeatCount = 1;
 
        b[2].EventType = KEY_EVENT;
        b[2].Event.KeyEvent.bKeyDown = TRUE;
        b[2].Event.KeyEvent.dwControlKeyState = 0;
        b[2].Event.KeyEvent.uChar.AsciiChar = '\r';
        b[2].Event.KeyEvent.wVirtualKeyCode = VK_RETURN;
        b[2].Event.KeyEvent.wRepeatCount = 1;
        b[2].Event.KeyEvent.wVirtualScanCode = 0x1c;
 
        b[3].EventType = KEY_EVENT;
        b[3].Event.KeyEvent.bKeyDown = FALSE;
        b[3].Event.KeyEvent.dwControlKeyState = 0;
        b[3].Event.KeyEvent.uChar.AsciiChar = '\r';
        b[3].Event.KeyEvent.wVirtualKeyCode = VK_RETURN;
        b[3].Event.KeyEvent.wVirtualScanCode = 0x1c;
        b[3].Event.KeyEvent.wRepeatCount = 1;
        DWORD numb;
        WriteConsoleInput(hStdIn, b, 4, &numb);
 
        cliThread->wait();
 
        #else
 
        cliThread->destroy();
 
        #endif
 
        delete cliThread;
    }
 
    // for some unknown reason, unloading scripts here and not in worldrunnable
    // fixes a memory leak related to detaching threads from the module
    //UnloadScriptingModule();
 
    // Exit the process with specified return value
    return World::GetExitCode();
}
 
/// Initialize connection to the databases
bool Master::_StartDB()
{
    MySQL::Library_Init();
 
    sLog->SetLogDB(false);
    std::string dbstring;
    uint8 async_threads, synch_threads;
 
    dbstring = ConfigMgr::GetStringDefault("WorldDatabaseInfo", "");
    if (dbstring.empty())
    {
        sLog->outError("World database not specified in configuration file");
        return false;
    }
 
    async_threads = ConfigMgr::GetIntDefault("WorldDatabase.WorkerThreads", 1);
    if (async_threads < 1 || async_threads > 32)
    {
        sLog->outError("World database: invalid number of worker threads specified. "
            "Please pick a value between 1 and 32.");
        return false;
    }
 
    synch_threads = ConfigMgr::GetIntDefault("WorldDatabase.SynchThreads", 1);
    ///- Initialise the world database
    if (!WorldDatabase.Open(dbstring, async_threads, synch_threads))
    {
        sLog->outError("Cannot connect to world database %s", dbstring.c_str());
        return false;
    }
 
    ///- Get character database info from configuration file
    dbstring = ConfigMgr::GetStringDefault("CharacterDatabaseInfo", "");
    if (dbstring.empty())
    {
        sLog->outError("Character database not specified in configuration file");
        return false;
    }
 
    async_threads = ConfigMgr::GetIntDefault("CharacterDatabase.WorkerThreads", 1);
    if (async_threads < 1 || async_threads > 32)
    {
        sLog->outError("Character database: invalid number of worker threads specified. "
            "Please pick a value between 1 and 32.");
        return false;
    }
 
    synch_threads = ConfigMgr::GetIntDefault("CharacterDatabase.SynchThreads", 2);
 
    ///- Initialise the Character database
    if (!CharacterDatabase.Open(dbstring, async_threads, synch_threads))
    {
        sLog->outError("Cannot connect to Character database %s", dbstring.c_str());
        return false;
    }
 
    ///- Get login database info from configuration file
    dbstring = ConfigMgr::GetStringDefault("LoginDatabaseInfo", "");
    if (dbstring.empty())
    {
        sLog->outError("Login database not specified in configuration file");
        return false;
    }
 
    async_threads = ConfigMgr::GetIntDefault("LoginDatabase.WorkerThreads", 1);
    if (async_threads < 1 || async_threads > 32)
    {
        sLog->outError("Login database: invalid number of worker threads specified. "
            "Please pick a value between 1 and 32.");
        return false;
    }
 
    synch_threads = ConfigMgr::GetIntDefault("LoginDatabase.SynchThreads", 1);
    ///- Initialise the login database
    if (!LoginDatabase.Open(dbstring, async_threads, synch_threads))
    {
        sLog->outError("Cannot connect to login database %s", dbstring.c_str());
        return false;
    }
 
    ///- Get the realm Id from the configuration file
    realmID = ConfigMgr::GetIntDefault("RealmID", 0);
    if (!realmID)
    {
        sLog->outError("Realm ID not defined in configuration file");
        return false;
    }
    sLog->outString("Realm running as realm ID %d", realmID);
 
    ///- Initialize the DB logging system
    sLog->SetLogDBLater(ConfigMgr::GetBoolDefault("EnableLogDB", false)); // set var to enable DB logging once startup finished.
    sLog->SetLogDB(false);
    sLog->SetRealmID(realmID);
 
    ///- Clean the database before starting
    clearOnlineAccounts();
 
    ///- Insert version info into DB
    WorldDatabase.PExecute("UPDATE version SET core_version = '%s', core_revision = '%s'", _FULLVERSION, _HASH);        // One-time query
 
    sWorld->LoadDBVersion();
 
    sLog->outString("Using World DB: %s", sWorld->GetDBVersion());
    return true;
}
 
void Master::_StopDB()
{
    CharacterDatabase.Close();
    WorldDatabase.Close();
    LoginDatabase.Close();
 
    MySQL::Library_End();
}
 
/// Clear 'online' status for all accounts with characters in this realm
void Master::clearOnlineAccounts()
{
    // Cleanup online status for characters hosted at current realm
    /// \todo Only accounts with characters logged on *this* realm should have online status reset. Move the online column from 'account' to 'realmcharacters'?
    LoginDatabase.DirectPExecute(
        "UPDATE account SET online = 0 WHERE online > 0 "
        "AND id IN (SELECT acctid FROM realmcharacters WHERE realmid = '%d')", realmID);
 
    CharacterDatabase.DirectExecute("UPDATE characters SET online = 0 WHERE online <> 0");
 
    // Battleground instance ids reset at server restart
    CharacterDatabase.DirectExecute(CharacterDatabase.GetPreparedStatement(CHAR_UPD_PLAYERS_BGDATA));
}