/* Copyright (C) 2014 InfiniDB, Inc.
   Copyright (C) 2016 MariaDB Corporation

   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; version 2 of
   the License.

   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, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/******************************************************************************************
* $Id: installer.cpp 64 2006-10-12 22:21:51Z dhill $
*
*
* List of files that will be updated during system install time on each server
*		/etc/rc.local
*
******************************************************************************************/
/**
 * @file
 */


#include <iterator>
#include <numeric>
#include <deque>
#include <iostream>
#include <ostream>
#include <fstream>
#include <cstdlib>
#include <string>
#include <limits.h>
#include <sstream>
#include <exception>
#include <stdexcept>
#include <vector>
#include "stdio.h"
#include "ctype.h"
#include <netdb.h>
#include <sys/sysinfo.h>

#include "mcsconfig.h"
#include "liboamcpp.h"
#include "configcpp.h"

using namespace std;
using namespace oam;
using namespace config;

#include "helpers.h"
using namespace installer;

#include "installdir.h"

typedef struct Module_struct
{
    std::string     moduleName;
    std::string     moduleIP;
    std::string     hostName;
} Module;

typedef std::vector<Module> ModuleList;

bool setOSFiles(string parentOAMModuleName, int serverTypeInstall);
bool makeBASH();
bool makeModuleFile(string moduleName, string parentOAMModuleName);
bool updateProcessConfig(int serverTypeInstall);
bool makeRClocal(string moduleName, int IserverTypeInstall);
bool uncommentCalpontXml( string entry);

extern string pwprompt;

string mysqlpw = " ";

bool rootUser = true;
string USER = "root";

int main(int argc, char* argv[])
{
    string cmd;
    Oam oam;
    string parentOAMModuleIPAddr;
    string parentOAMModuleHostName;
    ModuleList childmodulelist;
    ModuleList directormodulelist;
    ModuleList usermodulelist;
    ModuleList performancemodulelist;
    Module childmodule;

    string prompt;
    string nodeps = "-h";
    string installer_debug = "0";
    string packageType = "rpm";

    Config* sysConfig = Config::makeConfig();
    string SystemSection = "SystemConfig";
    string InstallSection = "Installation";

    string DBRootStorageType;

    if (argc < 12)
    {
        cerr << "installer: ERROR: not enough arguments" << endl;
        exit(1);
    }

    string calpont_rpm1 = argv[1];
    string calpont_rpm2 = argv[2];
    string calpont_rpm3 = argv[3];
    string mysql_rpm = argv[4];
    string mysqld_rpm = argv[5];
    string installType = argv[6];
    string password = argv[7];
    string reuseConfig = argv[8];
    nodeps = argv[9];
    mysqlpw = argv[10];
    installer_debug = argv[11];

    string numBlocksPctParam = "";
    string totalUmMemoryParam = "";
    if (argc >= 14) {
        if (string(argv[12]) != "-") {
            numBlocksPctParam = argv[12];
        }
        if (string(argv[13]) != "-") {
            totalUmMemoryParam = argv[13];
        }
    }

    ofstream file("/dev/null");

    //save cout stream buffer
    streambuf* strm_buffer = cout.rdbuf();

    // redirect cout to /dev/null
    cout.rdbuf(file.rdbuf());

    cout <<  calpont_rpm1 << endl;
    cout << calpont_rpm2 << endl;
    cout << calpont_rpm3 << endl;
    cout << mysql_rpm << endl;
    cout << mysqld_rpm << endl;
    cout << installType << endl;
    cout << password << endl;
    cout << reuseConfig << endl;
    cout << nodeps << endl;
    cout << mysqlpw << endl;
    cout << installer_debug << endl;
    if (!numBlocksPctParam.empty()) {
        cout << numBlocksPctParam << endl;
    }
    if (!totalUmMemoryParam.empty()) {
        cout << totalUmMemoryParam << endl;
    }

    // restore cout stream buffer
    cout.rdbuf (strm_buffer);

    if ( mysqlpw == "dummymysqlpw" )
        mysqlpw = " ";

    pwprompt = "--password=" + mysqlpw;

    //check if root-user
    int user;
    user = getuid();

    if (user != 0)
        rootUser = false;

    char* p = getenv("USER");

    if (p && *p)
        USER = p;

    string tmpDir = startup::StartUp::tmpDir();

    // setup to start on reboot, for non-root amazon installs
    if ( !rootUser )
    {
    	system("sed -i -e 's/#runuser/runuser/g' /etc/rc.d/rc.local >/dev/null 2>&1");
    }

    //copy Columnstore.xml.rpmsave if upgrade option is selected
    if ( installType == "upgrade" )
    {
        cmd = "/bin/cp -f " + std::string(MCSSYSCONFDIR) + "/columnstore/Columnstore.xml " + std::string(MCSSYSCONFDIR) + "/columnstore/Columnstore.xml.new 2>&1";
        system(cmd.c_str());
        cmd = "/bin/cp -f " + std::string(MCSSYSCONFDIR) + "/columnstore/Columnstore.xml.rpmsave " + std::string(MCSSYSCONFDIR) + "/columnstore/Columnstore.xml 2>&1";
        system(cmd.c_str());
    }

    string serverTypeInstall;
    int    IserverTypeInstall;

    try
    {
        serverTypeInstall = sysConfig->getConfig(InstallSection, "ServerTypeInstall");
    }
    catch (...)
    {
        cout << "ERROR: Problem getting ServerTypeInstall from the MariaDB ColumnStore  System Configuration file" << endl;
        exit(1);
    }

    IserverTypeInstall = atoi(serverTypeInstall.c_str());

    //get PPackage Type
    try
    {
        packageType = sysConfig->getConfig(InstallSection, "EEPackageType");
    }
    catch (...)
    {
        cout << "ERROR: Problem getting EEPackageType" << endl;
        exit(1);
    }

    //get Parent OAM Module Name and setup of it's Custom OS files
    string parentOAMModuleName;

    try
    {
        parentOAMModuleName = sysConfig->getConfig(SystemSection, "ParentOAMModuleName");

        if ( parentOAMModuleName == oam::UnassignedName )
        {
            cout << "ERROR: Parent OAM Module Name is unassigned" << endl;
            exit(1);
        }
    }
    catch (...)
    {
        cout << "ERROR: Problem getting Parent OAM Module Name" << endl;
        exit(1);
    }

    if ( installType == "initial" )
    {
        //cleanup/create /local/etc directories
        cmd = "rm -rf /var/lib/columnstore/local/etc > /dev/null 2>&1";
        system(cmd.c_str());
        cmd = "mkdir /var/lib/columnstore/local/etc > /dev/null 2>&1";
        system(cmd.c_str());

        //create associated /local/etc directory for parentOAMModuleName
        cmd = "mkdir /var/lib/columnstore/local/etc/" + parentOAMModuleName + " > /dev/null 2>&1";
        system(cmd.c_str());
    }

    //Get list of configured system modules
    SystemModuleTypeConfig sysModuleTypeConfig;

    try
    {
        oam.getSystemConfig(sysModuleTypeConfig);
    }
    catch (...)
    {
        cout << "ERROR: Problem reading the MariaDB ColumnStore System Configuration file" << endl;
        exit(1);
    }

    string ModuleSection = "SystemModuleConfig";

    //get OAM Parent Module IP addresses and Host Name
    for ( unsigned int i = 0 ; i < sysModuleTypeConfig.moduletypeconfig.size(); i++)
    {
        DeviceNetworkList::iterator listPT = sysModuleTypeConfig.moduletypeconfig[i].ModuleNetworkList.begin();

        for ( ; listPT != sysModuleTypeConfig.moduletypeconfig[i].ModuleNetworkList.end() ; listPT++)
        {
            HostConfigList::iterator pt1 = (*listPT).hostConfigList.begin();

            if ( (*listPT).DeviceName == parentOAMModuleName )
            {
                parentOAMModuleIPAddr = (*pt1).IPAddr;
                parentOAMModuleHostName = (*pt1).HostName;
                break;
            }
        }
    }

    for ( unsigned int i = 0 ; i < sysModuleTypeConfig.moduletypeconfig.size(); i++)
    {
        string moduleType = sysModuleTypeConfig.moduletypeconfig[i].ModuleType;
        int moduleCount = sysModuleTypeConfig.moduletypeconfig[i].ModuleCount;

        if ( moduleCount == 0 )
            //no modules equipped for this Module Type, skip
            continue;

        //get IP addresses and Host Names
        DeviceNetworkList::iterator listPT = sysModuleTypeConfig.moduletypeconfig[i].ModuleNetworkList.begin();

        for ( ; listPT != sysModuleTypeConfig.moduletypeconfig[i].ModuleNetworkList.end() ; listPT++)
        {
            string moduleName = (*listPT).DeviceName;
            HostConfigList::iterator pt1 = (*listPT).hostConfigList.begin();
            string moduleIPAddr = (*pt1).IPAddr;
            string moduleHostName = (*pt1).HostName;

            //save module info
            childmodule.moduleName = moduleName;
            childmodule.moduleIP = moduleIPAddr;
            childmodule.hostName = moduleHostName;

            if ( moduleName != parentOAMModuleName)
            {
                childmodulelist.push_back(childmodule);
            }

            if ( moduleType == "dm")
                directormodulelist.push_back(childmodule);

            if ( moduleType == "um")
                usermodulelist.push_back(childmodule);

            if ( moduleType == "pm")
                performancemodulelist.push_back(childmodule);

            if ( installType == "initial" )
            {
                //create associated /local/etc directory for module
                cmd = "mkdir /var/lib/columnstore/local/etc/" + moduleName + " > /dev/null 2>&1";
                system(cmd.c_str());
            }
        }
    } //end of i for loop

    if ( installType != "uninstall" )
    {
        //setup rc.local file in local parent module
        if ( !makeRClocal(parentOAMModuleName, IserverTypeInstall) )
            cout << "makeRClocal error" << endl;

        //create associated /local/etc directory for module
        // generate module
        ModuleList::iterator list1 = directormodulelist.begin();

        for (; list1 != directormodulelist.end() ; list1++)
        {
            cmd = "mkdir /var/lib/columnstore/local/etc/" + (*list1).moduleName + " > /dev/null 2>&1";
            system(cmd.c_str());

            //make module file in /local/etc/"modulename"
            if ( !makeModuleFile((*list1).moduleName, parentOAMModuleName) )
                cout << "makeModuleFile error" << endl;

            //setup rc.local file in module tmp dir
            if ( !makeRClocal((*list1).moduleName, IserverTypeInstall) )
                cout << "makeRClocal error" << endl;
        }

        list1 = usermodulelist.begin();

        for (; list1 != usermodulelist.end() ; list1++)
        {
            cmd = "mkdir /var/lib/columnstore/local/etc/" + (*list1).moduleName + " > /dev/null 2>&1";
            system(cmd.c_str());

            //make module file in /local/etc/"modulename"
            if ( !makeModuleFile((*list1).moduleName, parentOAMModuleName) )
                cout << "makeModuleFile error" << endl;

            //setup rc.local file in module tmp dir
            if ( !makeRClocal((*list1).moduleName, IserverTypeInstall) )
                cout << "makeRClocal error" << endl;
        }

        list1 = performancemodulelist.begin();

        for (; list1 != performancemodulelist.end() ; list1++)
        {
            cmd = "mkdir /var/lib/columnstore/local/etc/" + (*list1).moduleName + " > /dev/null 2>&1";
            system(cmd.c_str());

            //make module file in /local/etc/"modulename"
            if ( !makeModuleFile((*list1).moduleName, parentOAMModuleName) )
                cout << "makeModuleFile error" << endl;

            //setup rc.local file in module tmp dir
            if ( !makeRClocal((*list1).moduleName, IserverTypeInstall) )
                cout << "makeRClocal error" << endl;
        }
    }

    if ( installType == "initial" )
    {
        //setup local OS Files
        if ( !setOSFiles(parentOAMModuleName, IserverTypeInstall) )
        {
            cout << "ERROR: setOSFiles error" << endl;
            cout << " IMPORTANT: Once issue has been resolved, rerun postConfigure" << endl << endl;
            exit(1);
        }

        cmd = "chmod 755 -R /var/lib/columnstore/data1/systemFiles/dbrm > /dev/null 2>&1";
        system(cmd.c_str());
    }
    
    //
    // perform single-server install from postConfigure
    //

    //run the mysql / mysqld setup scripts
    cout << endl << "Running the MariaDB ColumnStore setup scripts" << endl << endl;

    // call the mysql setup scripts
    mysqlSetup();
    sleep(5);
    exit(0);
}


/*
 * Setup OS Files by appending the Calpont versions
 */

// /etc OS Files to be updated
string files[] =
{
    " "
};

bool setOSFiles(string parentOAMModuleName, int serverTypeInstall)
{
    string cmd;
    bool allfound = true;

    //update /etc files
    for ( int i = 0;; ++i)
    {
        if ( files[i] == " ")
            //end of list
            break;

        string fileName = "/etc/" + files[i];

        //make a backup copy before changing
            cmd = "rm -f " + fileName + ".columnstoreSave";
            system(cmd.c_str());

            cmd = "cp " + fileName + " " + fileName + ".columnstoreSave > /dev/null 2>&1";
            system(cmd.c_str());

            cmd = "cat /var/lib/columnstore/local/etc/" + parentOAMModuleName + "/" + files[i] + ".calpont >> " + fileName;

            if (geteuid() == 0) system(cmd.c_str());

            cmd = "rm -f /var/lib/columnstore/local/ " + files[i] + "*.calpont > /dev/null 2>&1";
            system(cmd.c_str());

            cmd = "cp /var/lib/columnstore/local/etc/" + parentOAMModuleName + "/" + files[i] + ".calpont /var/lib/columnstore/local/. > /dev/null 2>&1";
            system(cmd.c_str());
    }

    return allfound;
}

/*
 * Create a module file
 */
bool makeModuleFile(string moduleName, string parentOAMModuleName)
{
    string cmd;
    string fileName;

    if ( moduleName == parentOAMModuleName )
        fileName = "/var/lib/columnstore/local/module";
    else
        fileName = "/var/lib/columnstore/local/etc/" + moduleName + "/module";

    unlink (fileName.c_str());
    ofstream newFile (fileName.c_str());

    cmd = "echo " + moduleName + " > " + fileName;
    system(cmd.c_str());

    newFile.close();

    return true;
}

/*
 * Update ProcessConfig.xml file for a single server configuration
 * Change the 'um' and 'pm' to 'dm'
 */
bool updateProcessConfig(int serverTypeInstall)
{
    vector <string> oldModule;
    string newModule;
    string cmd;

    switch ( serverTypeInstall )
    {
        case (oam::INSTALL_COMBINE_DM_UM_PM):
        {
            newModule = ">pm";
            oldModule.push_back(">um");
            oldModule.push_back(">pm");
            break;
        }

        case (oam::INSTALL_COMBINE_DM_UM):
        {
            newModule = ">um";
            oldModule.push_back(">dm");
            break;
        }

        case (oam::INSTALL_COMBINE_PM_UM):
        {
            newModule = ">pm";
            oldModule.push_back(">um");
            break;
        }
    }

    string fileName = std::string(MCSSYSCONFDIR) + "/columnstore/ProcessConfig.xml";

    //Save a copy of the original version
    cmd = "/bin/cp -f " + fileName + " " + fileName + ".columnstoreSave > /dev/null 2>&1";
    system(cmd.c_str());

    ifstream oldFile (fileName.c_str());

    if (!oldFile) return false;

    vector <string> lines;
    char line[200];
    string buf;
    string newLine;
    string newLine1;

    while (oldFile.getline(line, 200))
    {
        buf = line;
        newLine = line;

        std::vector<std::string>::iterator pt1 = oldModule.begin();

        for ( ; pt1 != oldModule.end() ; pt1++)
        {
            int start = 0;

            while (true)
            {
                string::size_type pos = buf.find(*pt1, start);

                if (pos != string::npos)
                {
                    newLine = buf.substr(0, pos);
                    newLine.append(newModule);

                    newLine1 = buf.substr(pos + 3, 200);
                    newLine.append(newLine1);
                    start = pos + 3;
                }
                else
                {
                    buf = newLine;
                    start = 0;
                    break;
                }
            }
        }

        //output to temp file
        lines.push_back(buf);
    }

    oldFile.close();
    unlink (fileName.c_str());
    ofstream newFile (fileName.c_str());

    //create new file
    int fd = open(fileName.c_str(), O_RDWR | O_CREAT, 0666);

    copy(lines.begin(), lines.end(), ostream_iterator<string>(newFile, "\n"));
    newFile.close();

    close(fd);
    return true;
}


/*
 * Make makeRClocal to set mount scheduler
 */
bool makeRClocal(string moduleName, int IserverTypeInstall)
{

      return true;

    string moduleType = moduleName.substr(0, MAX_MODULE_TYPE_SIZE);

    vector <string> lines;

    string mount1;
    string mount2
    ;

    switch ( IserverTypeInstall )
    {
        case (oam::INSTALL_NORMAL):	// normal
        {
            if ( moduleType == "um" )
                mount1 = "/mnt\\/tmp/";
            else if ( moduleType == "pm" )
                mount1 = "/mariadb/columnstore\\/data/";
            else
                return true;

            break;
        }

        case (oam::INSTALL_COMBINE_DM_UM_PM):	// combined #1 - dm/um/pm
        {
            if ( moduleType == "pm" )
            {
                mount1 = "/mnt\\/tmp/";
                mount2 = "/mariadb/columnstore\\/data/";
            }
            else
                return true;

            break;
        }

        case (oam::INSTALL_COMBINE_DM_UM):	// combined #2 dm/um on a same server
        {
            if ( moduleType == "um" )
                mount1 = "/mnt\\/tmp/";
            else if ( moduleType == "pm" )
                mount1 = "/mariadb/columnstore\\/data/";
            else
                return true;

            break;
        }

        case (oam::INSTALL_COMBINE_PM_UM):	// combined #3 um/pm on a same server
        {
            if ( moduleType == "pm" )
            {
                mount1 = "/mnt\\/tmp/";
                mount2 = "/mariadb/columnstore\\/data/";
            }
            else
                return true;

            break;
        }
    }

    if ( !mount1.empty() )
    {
        string line1 = "for scsi_dev in `mount | awk '" + mount1 + " {print $1}' | awk -F/ '{print $3}' | sed 's/[0-9]*$//'`; do";
        string line2 = "        echo deadline > /sys/block/$scsi_dev/queue/scheduler";
        string line3 = "done";

        lines.push_back(line1);
        lines.push_back(line2);
        lines.push_back(line3);
    }
    else
    {
        if ( !mount2.empty() )
        {
            string line1 = "for scsi_dev in `mount | awk '" + mount2 + " {print $1}' | awk -F/ '{print $3}' | sed 's/[0-9]*$//'`; do";
            string line2 = "        echo deadline > /sys/block/$scsi_dev/queue/scheduler";
            string line3 = "done";

            lines.push_back(line1);
            lines.push_back(line2);
            lines.push_back(line3);
        }
    }

    if ( lines.begin() == lines.end())
        return true;

    string RCfileName = "/etc/rc.d/rc.local";
    std::ofstream file;

    file.open(RCfileName.c_str(), std::ios::out | std::ios::app);

    if (file.fail())
    {
        RCfileName = "/etc/rc.local";

        file.open(RCfileName.c_str(), std::ios::out | std::ios::app);

        if (file.fail())
            return true;
    }

    file.exceptions(file.exceptions() | std::ios::failbit | std::ifstream::badbit);

    copy(lines.begin(), lines.end(), ostream_iterator<string>(file, "\n"));

    file.close();

    return true;
}


/*
 * Uncomment entry in Columnstore.xml
 */
bool uncommentCalpontXml( string entry)
{
    string fileName = std::string(MCSSYSCONFDIR) + "/columnstore/Columnstore.xml";

    ifstream oldFile (fileName.c_str());

    if (!oldFile) return true;

    vector <string> lines;
    char line[200];
    string buf;
    string newLine;

    string firstComment = "<!--";
    string lastComment = "-->";

    while (oldFile.getline(line, 200))
    {
        buf = line;

        string::size_type pos = buf.find(entry, 0);

        if (pos != string::npos)
        {
            pos = buf.find(firstComment, 0);

            if (pos == string::npos)
            {
                return true;
            }
            else
            {
                buf = buf.substr(pos + 4, 80);

                pos = buf.find(lastComment, 0);

                if (pos == string::npos)
                {
                    return true;
                }
                else
                {
                    buf = buf.substr(0, pos);
                }
            }
        }

        //output to temp file
        lines.push_back(buf);
    }

    oldFile.close();
    unlink (fileName.c_str());
    ofstream newFile (fileName.c_str());

    //create new file
    int fd = open(fileName.c_str(), O_RDWR | O_CREAT, 0666);

    copy(lines.begin(), lines.end(), ostream_iterator<string>(newFile, "\n"));
    newFile.close();

    close(fd);
    return true;
}

// vim:ts=4 sw=4: