function checkpid() {
 if [ -f ${1} ]; then 
  out=`cat ${1}`
  [ -z "`ps -ef | awk -v pid=${out} '{if ($2 == pid) {print $2}}'`" ] && exit 1
 else 
  exit 1
 fi 
 echo "${out}"
}

function kill_service() {
 if [ ${1} -ne 0 ]; then 
  echo "${2} not running" 
 else 
  kill ${4} ${3} > /dev/null 2>&1
 fi 
}

function removeapachebuildinmodules() {
 ${2} -l | grep -v "Compiled in modules" | sed "s|\.c$|.so|g" | while read -r line; do
  sed -i "/^LoadModule.*\/${line}$/d" ${1}
 done  
}

function getpandabotconf() {
 out=`echo "${1}@@${2}" | php -R '$in=explode("@@", $argn); if (array_key_exists($in[1], yaml_parse_file($in[0]))) { echo yaml_parse_file($in[0])[$in[1]];} else exit(1);'`
 [ $? -ne 0 ] && exit 1
 echo "${out}"
}

function httpdbin() {
 out=`which httpd 2> /dev/null`
 if [ $? -ne 0 ]; then
  out=`which apache2 2> /dev/null`
  if [ $? -ne 0 ]; then
   exit 1
  fi
 fi 
 echo "${out}"
}

function phpfpmbin() {
 out=`find /usr/sbin/ -name php-fpm* 2> /dev/null | head -1`
 [ -z "${out}" ] && exit 1
 echo "${out}"
}

function apachemod() {
 out=`find /usr -name "mod_mpm_event.so" 2> /dev/null | awk -F / '{for (i=1;i<NF;i++) {printf ("%s/",$i)}}'`
 [ -z "${out}" ] && exit 1
 echo "${out}"
}

function checkservice() {
 out=`echo "${2}" | while read -d "|" arg; do
  [ "${arg}" = "${1}" ] && echo "${1}" && break
 done` 
 [ -z "${out}" ] && echo "${1}" && exit 1
 echo "${out}"
}

function prepare_web() {
 apache_serverroot=${bot_root}
 apache_start=`getpandabotconf "${pandabotconf}" "apache_start"`
 [ $? -ne 0 ] && echo "ERR: apache_start not configured @ ${pandabotconf}" && exit 1

 [ "${apache_start}" != "1" ] && echo "apache_start is not set yes @ ${pandabotconf}" && exit 1 
 
 if [ `id -u` -eq 0 ]; then 
  apache_user="nobody"
  apache_group="nobody"
 else 
  apache_user=`id -un`
  apache_group=`id -gn`
 fi # if [ `id -u` -eq 0 ]; then 

 apache_port=`getpandabotconf "${pandabotconf}" "apache_port"`
 [ $? -ne 0 ] && echo "ERR: apache_port not configured @ ${pandabotconf}" && exit 1
 [ ${apache_port} -lt 1025 ] && echo "ERR: apache_port must be greater than 1024 @ ${pandabotconf}" && exit 1 
}

function start_fpm() {
 prepare_web
 php_fpm_bin=`phpfpmbin` 
 [ $? -ne 0 ] && echo "ERR: php-fpm installation not found" && exit 1

 cat ${apache_serverroot}/conf/templates/template.php-fpm.conf \
 | sed "s|@@apache_serverroot@@|${apache_serverroot}|g" \
 | sed "s|@@apache_user@@|${apache_user}|g" \
 | sed "s|@@apache_group@@|${apache_group}|g" \
 | sed "s|@@apache_port@@|${apache_port}|g" \
 > ${apache_serverroot}/conf/php-fpm.conf

 ${php_fpm_bin} -y ${apache_serverroot}/conf/php-fpm.conf 2> /dev/null
 if [ $? -ne 0 ]; then
  echo "php-fpm already running"
  out=`checkpid "${fpm_pid}"`
  kill ${out} > /dev/null 2>&1
  ${php_fpm_bin} -y ${apache_serverroot}/conf/php-fpm.conf 2> /dev/null
  echo "php-fpm restarted"
 else 
  echo "php-fpm started"
 fi # if [ $? -ne 0 ]; then
}

function start_apache() {
 prepare_web
 apachebin=`httpdbin`
 [ $? -ne 0 ] && echo "ERR: apache installation not found" && exit 1

 apache_modules=`apachemod`
 [ $? -ne 0 ] && echo "ERR: no apache modules pfad found" && exit 1

 rm -rf ${apache_serverroot}/log/access_log > /dev/null 2>&1 # clear access_log file...

 apache_pid=${apache_serverroot}/log/tmp/httpd.pid 
 apache_documentroot="${apache_serverroot}/pb-web"

 cat ${apache_serverroot}/conf/templates/template.httpd.conf \
 | sed "s|@@apache_modules@@|${apache_modules}|g" \
 | sed "s|@@apache_serverroot@@|${apache_serverroot}|g" \
 | sed "s|@@apache_user@@|${apache_user}|g" \
 | sed "s|@@apache_group@@|${apache_group}|g" \
 | sed "s|@@apache_port@@|${apache_port}|g" \
 | sed "s|@@apache_documentroot@@|${apache_documentroot}|g" \
 | sed "s|@@apache_pid@@|${apache_pid}|g" \
 > ${apache_serverroot}/conf/httpd.conf

 removeapachebuildinmodules "${apache_serverroot}/conf/httpd.conf" "${apachebin}"

 chmod -R a+rwx ${apache_documentroot} 2>&1 /dev/null
 chmod -R a+rwx ${apache_serverroot}/log 2>&1 /dev/null
 
 ${apachebin} -f ${apache_serverroot}/conf/httpd.conf -k restart > /dev/null 2>&1
 if [ $? -eq 0 ]; then 
  echo "apache (re)started @ port: ${apache_port}"
 else 
  echo "ERR: apache not started, something is wrong..."
 fi # if [ $? -eq 0 ]; then
} 

function start_bot() {
 out=`checkpid "${bot_pid}"`
 [ ! -z "${out}" ] && echo "bot already running, exit!" && exit 1

 cp conf/channels.conf log/conf/${startDate}_channels.conf
 cp conf/pandabot.conf log/conf/${startDate}_pandabot.conf

 ls -r1 log/*_pandabot.app.log  | awk 'begin {c=0;} {c++; if (c>=10) {print $0}}' | xargs -n1 rm -f # logrotation? function? 
 ls -r1 log/conf/*pandabot.conf | awk 'begin {c=0;} {c++; if (c>=10) {print $0}}' | xargs -n1 rm -f
 ls -r1 log/conf/*channels.conf | awk 'begin {c=0;} {c++; if (c>=10) {print $0}}' | xargs -n1 rm -f

 if [ `id -u` -eq 0 ]; then 
  chown -R nobody *
  su nobody -c "nohup bin/pandabot.php 2>&1 | tee log.pandabot.log 2>&1 | tee log/${startDate}_pandabot.app.log > /dev/null &" 
  if [ $? -ne 0 ]; then
   echo "change user nobody from nologin to bash"
   usermod -s /usr/bin/bash nobody
   su nobody -c "nohup bin/pandabot.php 2>&1 | tee log.pandabot.log 2>&1 | tee log/${startDate}_pandabot.app.log > /dev/null &"
   [ $? -ne 0 ] && "ERR: change user nobody manually from /sbin/nologin to /bin/bash @ /etc/passwd, or start bot in usercontext" && exit 1
  fi # if [ $? -ne 0 ]; then
 else  
  nohup bin/pandabot.php 2>&1 | tee log.pandabot.log 2>&1 | tee log/${startDate}_pandabot.app.log > /dev/null &
 fi # if [ `id -u` -eq 0 ]; then 
}

function start_service() {
 echo "start ${1}"
 case "${1}" in
  "bot")
   start_bot
  ;;
  "apache")
   start_apache
   sleep 2
   status_service "${1}"
  ;;
  "fpm")
   start_fpm
  ;;
  "web")
   start_service "apache"
   start_service "fpm"
  ;;
  "all")
   start_service "bot"
   start_service "web"
  ;;
 esac
}

function stop_service() {
 echo "stop ${1}"
 case "${1}" in
  "bot")
   out=`checkpid "${bot_pid}"`
   kill_service "${?}" "${1}" "${out}" "-9"
   ;;
  "apache")
   out=`checkpid "${apache_pid}"`
   kill_service "${?}" "${1}" "${out}" ""
   ;;
  "fpm")
   out=`checkpid "${fpm_pid}"`
   kill_service "${?}" "${1}" "${out}" ""
   ;;
  "madeline")
   kill_service "0" "${1}" "${madeline_pid}" "-9"
  ;;
  "web")
   stop_service "apache"
   stop_service "fpm"
  ;;   
  "all")
   stop_service "web"
   stop_service "bot"
   stop_service "madeline"
  ;;
 esac
}

status_service() {
 case "${1}" in
  "bot")
   out=`checkpid "${bot_pid}"`
   if [ ${?} -eq 0 ]; then echo "${1} running"; else echo "${1} not running"; fi 
   ;;
  "apache")
   out=`checkpid "${apache_pid}"`
   if [ ${?} -eq 0 ]; then 
    apache_ip_running=`ip -br address | grep -iwv lo | awk '{print $3}' | awk -F / '{print $1}'`
	apache_port=`getpandabotconf "${pandabotconf}" "apache_port"`
    echo "${1} running on: http://${apache_ip_running}:${apache_port}/"; 
   else 
	echo "${1} not running"
   fi 
   ;;
  "fpm")
   out=`checkpid "${fpm_pid}"`
   if [ ${?} -eq 0 ]; then echo "${1} running"; else echo "${1} not running"; fi 
   ;;
  "madeline") ## grummel 
   if [ ${?} -eq 0 ]; then echo "${1} running"; else echo "${1} not running"; fi 
  ;;
  "web")
   echo "status ${1}"
   status_service "apache"
   status_service "fpm"
  ;;   
  "all")
   echo "status ${1}"
   status_service "web"
   status_service "bot"
   status_service "madeline"
  ;;
 esac
}

function bot_sh_usage() {
echo "usage: 
./bot.sh start
./bot.sh stop
./bot.sh restart
./bot.sh status 
-
./bot.sh setuptg 

./bot.sh start   -s [bot|web]
./bot.sh stop    -s [bot|web]
./bot.sh restart -s [bot|web]
./bot.sh status  -s [bot|web]
eg.
./bot.sh restart -s bot
./bot.sh restart -s web
"
}