#!/bin/bash
# Program:
#   NutchEz management interface
# Author: 
#   Waue, Shunfa, Rock {waue, shunfa, rock}@nchc.org.tw
# Version:
#    1.0
# History:
#   2010/06/07  Rock    First release (1.0)

# [Variables Declaration] #
DIALOG=dialog
main_choice=

# [PATH Declaration] #
NutchEZ_Install_PATH=/opt/nutchez
NutchEZ_HOME=/home/nutchuser/nutchez

# [Functions Declaration] #
## [Prepare Check]  ##
function prepare_check(){ 
# 若無 nutchez_nodes　則跳出
if [ ! -e "${NutchEZ_HOME}/system/nutch_nodes" ]; then
    $DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" --title "[nutch_nodes Files]" \
    --msgbox "Fail: Don't find $NutchEZ_HOME/system/nutch_nodes !!!" 10 40
    exit
fi

# 判斷 nutch_nodes　和 nutch_nodes.back
# 第一次執行則要求 user　更新 /etc/hosts
if [ ! -e "${NutchEZ_HOME}/system/nutch_nodes.bak" ]; then
    $DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" --title "[/etc/host Update]" \
    --yesno "First execut nutchez management interface.\nPlz update /etc/hosts !!!" 10 55

    echo -e "Plz input root password to update /etc/hosts !!!"
    ./duplicate_del "${NutchEZ_HOME}/system/nutch_nodes"
    su root -c "./duplicate_del /etc/hosts && ./add_hosts ${NutchEZ_HOME}/system/nutch_nodes /etc/hosts"
    #　若密碼輸入失敗則跳出
    if [ $? == "1" ]; then
        echo "Root password is error ! Plz check root password !!!"
        exit
    fi 
# 若 nutch_nodes 被更新過，則要求更新 /etc/hosts
elif [ ${NutchEZ_HOME}/system/nutch_nodes -nt ${NutchEZ_HOME}/system/nutch_nodes.bak ]; then
    $DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" --title "[/etc/host Update]" \
    --yesno "nutch_nodes already be modified.\nPlz update /etc/hosts !!!" 10 55

    echo -e "Plz input root password to update /etc/hosts !!!"
    ./duplicate_del "${NutchEZ_HOME}/system/nutch_nodes"
    su root -c "./duplicate_del /etc/hosts && ./add_hosts ${NutchEZ_HOME}/system/nutch_nodes /etc/hosts"
    #　若密碼輸入失敗則跳出                   
    if [ $? == "1" ]; then                    
        echo "Root password is error ! Plz check root password !!!"
        exit                                  
    fi
fi

}

## [Main Menu] ##
function main_menu(){
main_choice="/tmp/main_choice"

$DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" \
    --title "[Management Options]" \
        --menu "Plz choose: " 15 55 6 \
        "cluster_status" "Check cluster status" \
        "cluster_setup" "Setup your datanode & tasktracker" \
        "tomcat_switch" "Start/Stop/Restart Tomcat" \
        "tomcat_port" "Change Tomcat port" \
        "lang_switch" "Change language" \
        "exit" "Exit" 2>$main_choice
}

## [Cluster Status (datanode & tasktracker)] ##
function cluster_status(){
IP_list=$(cat $NutchEZ_HOME/system/nutch_nodes | grep -v '^$' | grep -v '#'  | awk '{print $1}')
clusterStatus="/tmp/clusterStatus"
rm $clusterStatus 2> /dev/null
#printf '%16s\t %11s\t %10s\t %25s\n' "[IP] [Hostanme] [Network] [Dtatnode & Tasktracker]" >>$clusterStatus
echo -e "[IP] \t\t [Hostanme] \t [Network] \t [Dtatnode & Tasktracker]" >>$clusterStatus
echo -e "------------------------------------------------------------------------" >>$clusterStatus
echo -e "\nStart to check cluster..."
for ip in $IP_list
do
    # Check Network status
    ip_status="online"
    ping -c1 -w1 $ip 2>&1 > /dev/null || ip_status="offline"
    # Check Hadoop/Nutch service through ssh
    Task_Data_status="stop"
    if [ $ip_status == "online" ]; then
    Task_Data=$(ssh -o StrictHostKeyChecking=no $ip "jps |grep TaskTracker ; jps | grep  DataNode")
    fi

#   if [ $? == "255" ]; then 
#   echo -e "$ip Network is down"
#   elif [ $? == "1" ]; then
#   echo -e "Can't ssh to $ip"
#   fi

    [ -z "$Task_Data" ] || Task_Data_status="running"
    host_name=$(cat $NutchEZ_HOME/system/nutch_nodes | grep $ip | awk '{print $2}')
    echo  -e "$ip  $host_name \t\t $ip_status \t $Task_Data_status" >>$clusterStatus
#    printf '%16s\t %11s\t %10s\t %25s\n' "$ip $host_name $ip_status $Task_Data_status" >>$clusterStatus
done

read -p "Plz input anykey to continue..."
$DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" \
     --title "[Cluster Status]" --textbox $clusterStatus 20 90
}

## [Cluster Setup (datanode & tasktracker)] ##
function cluster_setup(){
# 從 nutch_nodes 讀出 ip　和 hostname
#IP_list=$(cat $NutchEZ_HOME/system/nutch_nodes | grep -v '^$' | grep -v '#' | awk '{print $1}')
#HOST_list=$(cat $NutchEZ_HOME/system/nutch_nodes | grep -v '^$' | grep -v '#' | awk '{print $2}')
LIST_status="off"
allpart="/tmp/allpart"
runNodes="/tmp/runNodes"
clusterSetup="/tmp/clusterSetup"

$DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" \
    --title "[Management Options]" \
    --menu "Plz choose: " 15 55 2 \
    "All" "All nodes" \
    "Part" "choose part nodess" 2>$allpart

# 判斷是否選 all　和 part，若是 all　直接到服務選單，若是 part 則先到機器選單
if [ $(cat $allpart) == "All" ]; then
     cat $NutchEZ_HOME/system/nutch_nodes | grep -v '^$' | grep -v '#'  | awk '{print $1}' >$runNodes
else
    $DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC  = " --title "[Datanode & Tasktracker Nodes Choose]" \
    --checklist "datanode & tasktracker choose: " 15 55 7 $(cat  $NutchEZ_HOME/system/nutch_nodes | \
    grep -v '^$' | grep -v '#'  | awk '{print $1 "\t" $2 "\t" "$LIST_status" }') 2>$runNodes
fi

$DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" --title "[Datanode & Tasktracker Setup]" \
    --menu "Plz choose: " 10 65 3 \
    "start" "Start datanodes & tasktrackers" \
    "stop" "Stop datanodes & tasktrackers" \
    "restart" "restart datanodes & tasktrackers" \
    "exit" "Exit" 2>$clusterSetup

if [ "$(cat $clusterSetup)" == "start" ]; then
    for node in $(cat $runNodes)
    do
        echo -e "start !"
        echo -e "ssh -o StrictHostKeyChecking=no $node /opt/nutchez/nutch/bin/hadoop-daemon.sh start datanode"
        ssh -o StrictHostKeyChecking=no $node "/opt/nutchez/nutch/bin/hadoop-daemon.sh start datanode"
        echo -e "ssh -o StrictHostKeyChecking=no $node /opt/nutchez/nutch/bin/hadoop-daemon.sh start tasktracker"
        ssh -o StrictHostKeyChecking=no $node "/opt/nutchez/nutch/bin/hadoop-daemon.sh start tasktracker"
        [ $? == "0" ] || echo "Can't ssh to $node !!!"
    done
elif [ "$(cat $clusterSetup)" == "stop" ]; then
    for node in $(cat $runNodes)
    do
        echo -e "stop !"
        echo -e "ssh -o StrictHostKeyChecking=no $node /opt/nutchez/nutch/bin/hadoop-daemon.sh stop datanode"
        ssh -o StrictHostKeyChecking=no $node "/opt/nutchez/nutch/bin/hadoop-daemon.sh stop datanode"
        echo -e "ssh -o StrictHostKeyChecking=no $node /opt/nutchez/nutch/bin/hadoop-daemon.sh stop tasktracker"
        ssh -o StrictHostKeyChecking=no $node "/opt/nutchez/nutch/bin/hadoop-daemon.sh stop tasktracker"
        [ $? == "0" ] || echo "Can't ssh to $node !!!"
    done
else
    for node in $(cat $runNodes)
    do  
        echo -e "restart !"
        ssh -o StrictHostKeyChecking=no $node "/opt/nutchez/nutch/bin/hadoop-daemon.sh stop datanode"
        ssh -o StrictHostKeyChecking=no $node "/opt/nutchez/nutch/bin/hadoop-daemon.sh stop tasktracker"
        ssh -o StrictHostKeyChecking=no $node "/opt/nutchez/nutch/bin/hadoop-daemon.sh start datanode"
        ssh -o StrictHostKeyChecking=no $node "/opt/nutchez/nutch/bin/hadoop-daemon.sh start tasktracker"
        [ $? == "0" ] || echo "Can't ssh to $node !!!"
    done
  
fi
}

## [Tomcat Severice start/stop/restart] ##
function tomcat_switch(){
pid_tc=$(ps axw -eo pid,command | grep "catalina" | grep "java" | grep "start" | awk '{print $1}')
#echo $pid_tc
#read
if [ -n "$pid_tc" ]; then
    $DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" --title "[Tomcat Status]" \
        --msgbox "Tomcat is runing in this system !!!" 7 50
else
    $DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" --title "[Tomcat Status]" \
        --msgbox "Tomcat is not running in this system !!!" 7 50
fi
tomcatSwitch="/tmp/tomcatSwitch"
$DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" --title "[Tomcat Service Options]" \
    --menu "Plz choose: " 15 55 4 \
        "start" "Start tomcat" \
        "stop" "Stop tomcat" \
        "restart" "Restart tomcat" \
        "exit" "Exit" 2>$tomcatSwitch

if [ "$(cat $tomcatSwitch)" == "start" ]; then
    echo "/opt/nutchez/tomcat/bin/startup.sh"
    /opt/nutchez/tomcat/bin/startup.sh
elif [ "$(cat $tomcatSwitch)" == "stop" ]; then
    echo "/opt/nutchez/tomcat/bin/shutdown.sh"
    /opt/nutchez/tomcat/bin/shutdown.sh
elif [ "$(cat $tomcatSwitch)" == "restart" ]; then
    echo "/opt/nutchez/tomcat/bin/restart.sh"
    /opt/nutchez/tomcat/bin/shutdown.sh
    /opt/nutchez/tomcat/bin/startup.sh
else
    exit 0
fi
}

## [Tomcat Port Change] ##
function tomcat_port(){

if [ ! -e /opt/nutchez/tomcat/conf/server.xml ]; then
    $DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC =" --title "[Tomcat Servel.xml]" \
        --msgbox "Fial: Don't find /opt/nutchez/tomcat/conf/server.xml !!!" 10 50
    exit
fi
tomcatPort="/tmp/tomcatPort"
$DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC  = " --title "[Tomcat Port Change]" \
    --inputbox "Plz input port number for tomcat (default is 8080)" 10 55 2>$tomcatPort

if [ -z $(cat $tomcatPort) ]; then
    exit
else
    modify_line_nu=$(cat -n /opt/nutchez/tomcat/conf/server.xml | grep -v SSL | grep 'HTTP/1.1' | grep '<Connector' | awk '{print $1}')
    sed -i "${modify_line_nu}c <Connector port="$tomcatPort" protocol="HTTP/1.1"" /opt/nutchez/tomcat/conf/server.xml
fi
}


## [Language Change] ##
function lang_switch(){
echo -e "lang_switch"
langSwitch="/tmp/langSwitch"
$DIALOG --clear --backtitle "= [NutchEz Management Interface] ~by NCHC  =" --title "[Language Swaitch]" \
    --menu "Plz choose: " 15 55 3 \
    "English" "English" \
    "Chinese" "Chinese" 2>$langSwitch
#
echo "source $(cat $langSwitch)"
}


# [Main Code] #
if [ $USER != "nutchuser" ]; then
    echo -e "\nYour identify is not nutchuser, plz change to \"nutchuser\" !!!"
    exit
fi

prepare_check
main_menu
case $(cat $main_choice) in
    "cluster_status")
        cluster_status;;
    "cluster_setup")
        cluster_setup;;
    "tomcat_switch")
        tomcat_switch;;
    "tomcat_port")
        tomcat_port;;
    "lang_switch")
        lang_switch;;
esac