/******************************************************************************//**
*    @file       CTsdbSaveSrv.cpp
*    @brief      时序库存库服务，，服务框架
*    @author     yikenan
*    @version    1.0
*    @date       
**********************************************************************************/

#include "boost/program_options.hpp"
#include "boost/algorithm/string/predicate.hpp"

#include "pub_logger_api/logger.h"
#include "pub_utility_api/SingleProcInstance.h"
#include "net_msg_bus_api/MsgBusApi.h"
#include "tsdb_api/TsdbApi.h"

#include "CNodeMng.h"

#include "CTsdbSaveSrv.h"


#define TSDB_LOCAL_SAVE_SRV_PROC_NAME "tsdb_local_save"
using namespace std;
using namespace iot_public;

namespace iot_dbms
{

CTsdbSaveSrv::CTsdbSaveSrv()
{
    m_enRunModel = RM_NORMAL;
}


CTsdbSaveSrv::~CTsdbSaveSrv()
{
    stop();

    iot_public::StopLogSystem();
}


//< @param int & nStatus 错误码
bool CTsdbSaveSrv::start(int argc, char *argv[], int& /*nStatus*/)
{
    assert(!m_ptrRedunSw); //< NULL

    string strAppName;
    string strStartArgs;
    //< 参数解析
    if (!parseCommandLine(argc, argv, strAppName,strStartArgs))
    {
        std::cerr << "参数解析失败" << std::endl;
        return false;
    }

    //< 启动日志
    iot_public::StartLogSystem(strAppName.c_str(), TSDB_LOCAL_SAVE_SRV_PROC_NAME);

    if(!getSysAppInfo(strAppName))
    {
        LOGERROR("获取应用信息失败");
        return false;
    }

    //< 判断是否已启动
    if (isAlreadyRunning(strStartArgs))
    {
        LOGFATAL(TSDB_LOCAL_SAVE_SRV_PROC_NAME" 已启动，不可重复启动，本实例退出！");
        return false;
    }

    //< 消息总线
    if (!iot_net::initMsgBus(TSDB_LOCAL_SAVE_SRV_PROC_NAME, "", true))
    {
        LOGFATAL("初始化消息总线失败，程序启动失败！");
        return false;
    }

    //< 时序库接口库
    if (!initTsdbApi())
    {
        LOGFATAL("初始化时序库接口库失败，程序启动失败！");
        return false;
    }

    //< 初始化 CNodeMng 加载配置等
    if (!CNodeMng::getInstance().init(m_stRunAppInfo))
    {
        LOGFATAL("CNodeMng 初始化失败，程序启动失败！");
        return false;
    }

    //< CFrontThread 由 m_ptrRedunSw 管理

    //< 初始化 m_ptrRedunSw
    m_ptrRedunSw.reset(new CTsdbSaveRedunSw(this,m_stRunAppInfo));
    if(m_ptrRedunSw == NULL || m_ptrRedunSw->initialize() != iotSuccess)
    {
        LOGFATAL("CNodeMng 初始化失败，程序启动失败！");
        return false;
    }

    switch (m_enRunModel)
    {
    case RM_NORMAL:
        {
            //< 进程管理
            {
                iot_sys::SProcessInfoKey objProcInfo;
                objProcInfo.nAppId = m_stRunAppInfo.nAppId;
                objProcInfo.nDomainId = CNodeMng::getInstance().getLocalDomainID();
                objProcInfo.strNodeName = CNodeMng::getInstance().getLocalNodeName();
                objProcInfo.strProcName = TSDB_LOCAL_SAVE_SRV_PROC_NAME;
                objProcInfo.strProcParam = strStartArgs;

                m_ptrProcMng = iot_sys::getProcMngInstance(objProcInfo);
                if (!m_ptrProcMng)
                {
                    LOGFATAL("getProcMngInstance return NULL");
                    return false;
                }

                m_ptrProcMng->setCallback(this);
            }

            //< 冗余管理
            {
                m_ptrRedundantMng = iot_sys::getRedundantMngInstance(CNodeMng::getInstance().getLocalDomainID(),
                                                                     m_stRunAppInfo.nAppId,
                                                                     CNodeMng::getInstance().getLocalNodeName());
                if (!m_ptrRedundantMng)
                {
                    LOGERROR("getRedundantMngInstance return NULL");
                    return false;
                }

                m_ptrRedundantMng->setCallback(m_ptrRedunSw);
            }

            //< 更新进程管理状态
            updateProcInfo(true, false, false);
        }
        break;
    case RM_NO_PROC_MNG_MASTER:
        {
            if (iotSuccess != m_ptrRedunSw->redundantSwitch(true, false))
            {
                LOGFATAL("以主机模式启动失败！");
                return false;
            }
        }
        break;
    case RM_NO_PROC_MNG_SLAVE:
        {
            if (iotSuccess != m_ptrRedunSw->redundantSwitch(false, true))
            {
                LOGFATAL("以备机模式启动失败！");
                return false;
            }
        }
        break;
    default:
        {
            LOGFATAL("非预期的启动模式，程序启动失败！");
            return false;
        }
        break;
    }

    LOGINFO(TSDB_LOCAL_SAVE_SRV_PROC_NAME" is now running ...");

    return true;
}


bool CTsdbSaveSrv::stop()
{
    LOGINFO(TSDB_LOCAL_SAVE_SRV_PROC_NAME" is now exiting ...");

    //< 取消冗余切换，防止正在退出时发生冗余切换
    if (m_ptrRedundantMng)
    {
        //LOGDEBUG("Release m_ptrRedundantMng ...");

        m_ptrRedundantMng->unsetCallback();
        m_ptrRedundantMng.reset();

        //LOGDEBUG("Release m_ptrRedundantMng complete !");
    }

    //< 释放 m_ptrRedunSw
    if (m_ptrRedunSw)
    {
        //LOGDEBUG("Release m_ptrRedunSw ...");

        m_ptrRedunSw.reset();

        //LOGDEBUG("Release m_ptrRedunSw complete !");
    }

    //< 取消进程管理回调
    //if (m_ptrProcMng)
    //{
    //    m_ptrProcMng->unsetCallback();
    //}

    //< 清理业务线程
    if (CNodeMng::haveInstance())
    {
        //LOGDEBUG("Release CNodeMng ...");

        //< CFrontThread 由 m_ptrRedunSw 管理
        CNodeMng::getInstance().release();

        //LOGDEBUG("Release CNodeMng complete !");
    }

    //< 更新进程管理状态
    if (m_ptrProcMng)
    {
        //LOGDEBUG("Release m_ptrProcMng ...");

        updateProcInfo(false, false, false);
        m_ptrProcMng.reset();

        //LOGDEBUG("Release m_ptrProcMng complete !");
    }

    //< 释放时序库接口库
    releaseTsdbApi();

    //< 停止消息总线
    iot_net::releaseMsgBus();

    //< 停止日志系统
    //< 移到析构函数中，防止日志库停止后，又写日志，从而使log4cplus提示找不到logger
    //iot_public::StopLogSystem();

    return true;
}


int CTsdbSaveSrv::toQuit()
{
    shutdown();
    return iotSuccess;
}


int CTsdbSaveSrv::updateProcInfo(bool bActive, bool bMaster, bool bSlave)
{
    if (m_ptrProcMng)
    {
        return m_ptrProcMng->updateProcessInfo(bActive, bMaster, bSlave);
    }

    return iotFailed;
}


bool CTsdbSaveSrv::isAlreadyRunning(const std::string &strStartArgs )
{
    std::string strUniqueName = TSDB_LOCAL_SAVE_SRV_PROC_NAME;
    strUniqueName += strStartArgs;
    return iot_public::CSingleProcInstance::hasInstanceRunning( strUniqueName );
}


bool CTsdbSaveSrv::parseCommandLine(int argc, char *argv[],std::string &strAppName, std::string &strStartArgs)
{
    //< 拼接启动参数，用于向进程管理注册
    for ( int i = 1; i < argc; ++i )
    {
        if ( i != 1 )
        {
            strStartArgs += " ";
        }
        strStartArgs += argv[i];
    }

    namespace po = boost::program_options;
    po::options_description desc("usage");
    po::variables_map vm;
    try
    {
        desc.add_options()
            ("app"",a", po::value<std::string>(), "\t""The APP name, can only ran as PUBLIC")
            ("no_proc_mng_master"",m", "\t""Run as master without ProcMng and RedundantMng")
            ("no_proc_mng_slave"",s", "\t""Run as slave without ProcMng and RedundantMng")
            ("help"",h", "\t""Print this info");
        po::store(po::parse_command_line(argc, argv, desc), vm);
        po::notify(vm);

        if (vm.count("help"))
        {
            std::cout << desc << std::endl;
            return false;
        }

        if (vm.count("no_proc_mng_master") && vm.count("no_proc_mng_slave"))
        {
            std::cout << "no_proc_mng_master and no_proc_mng_slave can not use at the same time !" << std::endl;
            return false;
        }

        if (0 == vm.count("app"))
        {
            std::cout << "Must set app !" << std::endl;
            return false;
        }
        else
        {
            strAppName = vm["app"].as<std::string>();
        }

        if (vm.count("no_proc_mng_master"))
        {
            m_enRunModel = RM_NO_PROC_MNG_MASTER;
        }
        else if (vm.count("no_proc_mng_slave"))
        {
            m_enRunModel = RM_NO_PROC_MNG_SLAVE;
        }
        else
        {
            m_enRunModel = RM_NORMAL;
        }
    }
    catch (std::exception &ex)
    {
        std::cerr << ex.what() << std::endl;
        std::cout << desc << std::endl;
        return false;
    }
    catch (...)
    {
        std::cerr << "未知错误" << std::endl;
        std::cout << desc << std::endl;
        return false;
    }

    return true;
}

bool CTsdbSaveSrv::getSysAppInfo(const std::string &strAppName)
{
    CSysInfoInterfacePtr sysInfoPtr;
    if(createSysInfoInstance(sysInfoPtr) == false)
    {
        LOGERROR("AppName=%s ,createSysInfoInstance fail!\n", strAppName.c_str());
        return false;
    }
    if(sysInfoPtr == NULL)
    {
        LOGERROR("AppName=%s ,Get System Info  fail!\n", strAppName.c_str());
        return false;
    }


    if(iotSuccess != sysInfoPtr->getLocalRunAppInfoByName(strAppName,m_stRunAppInfo))
    {
        LOGERROR("getLocalRunAppInfoByName fail");
        return false;
    }

    return true;
}

} //< namespace iot_dbms