#!/bin/sh

SCRIPT="$0"

err_exit() {
    echo $@
    exit 1
}

check_file() {
    if [ ! -f $1 ]; then
        err_exit "cannot find $1"
    fi
}

unzip_elasticsearch() {
    echo "unzip elasticsearch"

    es_path=$ZS_HOME/thirdparty/elasticsearch*
    ls $es_path &>/dev/null
    if [ $? -ne 0 ]; then
        err_exit "cannot find elasticsearch tarball at $es_path"
    fi
    es_path=`ls $es_path`
    tar xzf $es_path -C $RUNTIME_HOME
}

unzip_tomcat_deploy_war() {
    echo "unzip tomcat and deploy zstack.war"

    tomcat_path=$ZS_HOME/thirdparty/apache-tomcat*
    ls $tomcat_path &>/dev/null
    if [ $? -ne 0 ]; then
        err_exit "cannot find tomcat tarball at $es_path"
    fi
    tomcat_path=`ls $tomcat_path`
    tar xzf $tomcat_path -C $RUNTIME_HOME
    tcathome=`ls -d $RUNTIME_HOME/apache-tomcat*`

    warfile=$ZS_HOME/lib/zstack.war
    check_file $warfile
    wardir=$tcathome/webapps/zstack

    mkdir -p $wardir
    unzip $warfile -d $wardir &>/dev/null
}

start_elasticsearch() {
    ps -aux | grep java | grep elasticsearch &>/dev/null
    if [ $? -eq 0 ]; then
        return
    fi

    sh $ES_HOME/bin/elasticsearch
}

# SCRIPT may be an arbitrarily deep series of symlinks. Loop until we have the concrete path.
while [ -h "$SCRIPT" ] ; do
  ls=`ls -ld "$SCRIPT"`
  # Drop everything prior to ->
  link=`expr "$ls" : '.*-> \(.*\)$'`
  if expr "$link" : '/.*' > /dev/null; then
    SCRIPT="$link"
  else
    SCRIPT=`dirname "$SCRIPT"`/"$link"
  fi
done

ZS_HOME=`dirname "$SCRIPT"`/..
RUNTIME_HOME=$ZS_HOME/runtime
mkdir -p $RUNTIME_HOME

ls -d $RUNTIME_HOME/elasticsearch* &>/dev/null
if [ $? -ne 0 ]; then
    unzip_elasticsearch
fi
ES_HOME=`ls -d $RUNTIME_HOME/elasticsearch*`

ls -d $RUNTIME_HOME/apache-tomcat* &>/dev/null
if [ $? -ne 0 ]; then
    unzip_tomcat_deploy_war
fi
TOMCAT_HOME=`ls -d $RUNTIME_HOME/apache-tomcat*`

echo $ES_HOME
echo $TOMCAT_HOME

start_elasticsearch

usage() {
    echo "usage: $0
    [start|stop|restart]"
    exit 1
}

if [ $# -eq 0 ]; then
    usage
fi

start_tomcat() {
   sh $TOMCAT_HOME/bin/startup.sh
   echo "start zstack ... SUCCESS"
}

stop_tomcat() {
   sh $TOMCAT_HOME/bin/shutdown.sh
   echo "start zstack ... SUCCESS"
}

restart_tomcat() {
    start_tomcat
    stop_tomcat
}

if [ $1 == 'start' ]; then
    start_tomcat
elif [ $1 == 'stop' ]; then
    stop_tomcat
elif [ $1 == 'restart' ]; then
    restart_tomcat
else
    usage
fi