#!/usr/bin/env bash

CUR_IFS="$IFS"

script_name="$(basename $(realpath $0))"
script_dir="$(dirname $(realpath $0))"

conf_dir="${script_dir}/conf"

declare -a unsorted_website_arr
declare -a website_arr

log_file="$(mktemp)"

backup_date=$(date +%Y-%m-%d-%H%M)


# =============
# --- Some functions
# =============

clean_up() {


   if [[ -f "$_backup_crontab_file" ]]; then

      blank_line
      echononl "(Re)Install previously saved crontab from '$_backup_crontab_file'.."

      crontab $_backup_crontab_file >> $log_file 2>&1

      if [[ $? -eq 0 ]]; then
         echo_ok
      else
         echo_failed
         error "$(cat $log_file)"
      fi

   fi

   # Perform program exit housekeeping
   rm -f $log_file
   blank_line
   exit $1
}

is_number() {

   return $(test ! -z "${1##*[!0-9]*}" > /dev/null 2>&1);

   # - also possible
   # -
   #[[ ! -z "${1##*[!0-9]*}" ]] && return 0 || return 1
   #return $([[ ! -z "${1##*[!0-9]*}" ]])
}

echononl(){
   echo X\\c > /tmp/shprompt$$
   if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
      echo -e -n "$*\\c" 1>&2
   else
       echo -e -n "$*" 1>&2
   fi
   rm /tmp/shprompt$$
}
echo_done() {
   if $terminal ; then
      echo -e "\033[75G[ \033[32mdone\033[m ]"
   else
      echo " [ done ]"
   fi
}
echo_ok() {
   if $terminal ; then
      echo -e "\033[75G[ \033[32mok\033[m ]"
   else
      echo " [ ok ]"
   fi
}
echo_warning() {
   if $terminal ; then
      echo -e "\033[75G[ \033[33m\033[1mwarn\033[m ]"
   else
      echo " [ warning ]"
   fi
}
echo_failed(){
   if $terminal ; then
      echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
   else
      echo ' [ failed! ]'
   fi
}
echo_skipped() {
   if $terminal ; then
      echo -e "\033[75G[ \033[37mskipped\033[m ]"
   else
      echo " [ skipped ]"
   fi
}
fatal (){
   echo ""
   echo ""
   if $terminal ; then
      echo -e "\t[ \033[31m\033[1mFatal\033[m ]: \033[37m\033[1m$*\033[m"
      echo ""
      echo -e "\t\033[31m\033[1m           Script will be interrupted..\033[m\033[m"
   else
      echo "fatal: $*"
      echo "Script will be interrupted.."
   fi
   clean_up 1
}

error(){
   echo ""
   if $terminal ; then
      echo -e "\t[ \033[31m\033[1mFehler\033[m ]: $*"
   else
      echo "Error: $*"
   fi
   echo ""
}

warn (){
   echo ""
   if $terminal ; then
      echo -e "\t[ \033[33m\033[1mWarning\033[m ]: $*"
   else
      echo "Warning: $*"
   fi
   echo ""
}

info (){
   echo ""
   if $terminal ; then
      echo -e "\t[ \033[32m\033[1mInfo\033[m ]: $*"
   else
      echo "Info: $*"
   fi
   echo ""
}
detect_os_1 () {

   if $(which lsb_release > /dev/null 2>&1) ; then

      os_dist="$(lsb_release -i | awk '{print tolower($3)}')"
      os_version="$(lsb_release -r | awk '{print tolower($2)}')"
      os_codename="$(lsb_release -c | awk '{print tolower($2)}')"

      if [[ "$os_dist" = "debian" ]]; then
         if $(echo "$os_version" | grep -q '\.') ; then
            os_version=$(echo "$os_version" | cut --delimiter='.' -f1)
         fi
      fi

   elif [[ -e "/etc/os-release" ]]; then

      . /etc/os-release

      os_dist=$ID
      os_version=${VERSION_ID}

   fi

   # remove whitespace from os_dist and os_version
   os_dist="${os_dist// /}"
   os_version="${os_version// /}"

}

## - Check if a given array (parameter 2) contains a given string (parameter 1)
## -
containsElement () {
   local e
   for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
   return 1
}

blank_line() {
   if $terminal ; then
      echo ""
   fi
}

# ----------
# - Jobhandling 
# ----------

# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
# -
trap clean_up SIGHUP SIGINT SIGTERM


# ----------
# - Some checks ..
# ----------

# - Running in a terminal?
# -
if [[ -t 1 ]] ; then
   terminal=true
else
   terminal=false
fi


# ----------
#  Read Configurations from $conf_file
# ----------


# ==========
# - Begin Main Script
# ==========

# ----------
# - Headline
# ----------

clear

if $terminal ; then
   echo ""
   echo -e "\033[1m----------\033[m"
   echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
   echo -e "\033[1m----------\033[m"
fi


# - Determin httpd binary
# -
_httpd_binary="`which httpd`"
if [ -z "$_httpd_binary" ]; then
   _httpd_binary="$(ps -axu | grep httpd |  grep -e "^root" | grep -v grep | awk '{print$11}')"
   if [ -z "$_httpd_binary" ]; then
      if [ -x "/usr/local/apache2/bin/httpd" ]; then
         _httpd_binary="/usr/local/apache2/bin/httpd"
      fi
   fi
fi

# - Determin ServerRoot Directory
# -
apache_base_dir=`$_httpd_binary -t -D DUMP_RUN_CFG | grep ServerRoot | awk '{print$2}' | tr -d '"'`
if [ "`realpath /usr/local/apache2`" = "$apache_base_dir" ]; then
   apache_base_dir="/usr/local/apache2"
   _apache_base_dir_realpath="`realpath $apache_base_dir`"
elif [ -z "$apache_base_dir" ]; then
   if [ -d "`realpath /usr/local/apache2`" ];then
      apache_base_dir="/usr/local/apache2"
      _apache_base_dir_realpath="`realpath $apache_base_dir`"
   fi
else
   _apache_base_dir_realpath=$apache_base_dir
fi
if [ -z "$apache_base_dir" ];then
   _base_webserver_info_needed=true
else
   _pass_apache_base_dir=true
fi



# - Determine the installed different PHP major versions
# -
__major_php_verisons=""
_php_installation_dirs=`find /usr/local -mindepth 1 -maxdepth 1 -type l -name "*php-*" -print | sort`
for dir in $_php_installation_dirs ; do
   _major_version="${dir##*-}"
   __major_php_verisons="$__major_php_verisons $_major_version"
done
_major_php_verisons=`echo "$__major_php_verisons" | sed 's/^ *//'`

 __vhost_base_dir=${apache_base_dir}/conf/vhosts
echo ""
echo ""
echo -e "\033[32m--\033[m"
echo ""
echo "Insert Directory where the vhost configuration file should stay.."
echo ""
echo ""
_vhost_base_dir=
while [ "X$_vhost_base_dir" = "X" ] ; do
   echononl "VHost Base Directory [$__vhost_base_dir]: "
   read _vhost_base_dir
   if [ "X$_vhost_base_dir" = "X" ]; then
      _vhost_base_dir=$__vhost_base_dir
   fi
   if [ ! -d "$_vhost_base_dir" ];then
      echo -e "\n\t\033[1;33mDirectory \"${_vhost_base_dir}\" not found! Try again..\033[m\n"
      _vhost_base_dir=""
   fi
done



echo ""
echo -e "   \033[32m\033[1mParameter Summary:\033[m"
echo ""

echo "   PHP installed versions.............: $_major_php_verisons"
echo ""
echo "   Apache VHost directory.............: $_vhost_base_dir"

echo ""
echononl "   \033[33mContinue with this parameters? [\033[1myes/no\033[m]: "
read OK
while [[ "${OK,,}" != "yes" ]] && [[ "${OK,,}" != "no" ]] ; do
   echononl "   \033[33mWrong entry!\033[m [\033[1myes/no\033[m]: "
   read OK
done
[[ "${OK,,}" = "yes" ]] || fatal "Canceled by user input."


# ----------
# - Some pre-script tasks ..
# ----------

if $terminal ; then
   echo ""
   echo ""
   echo -e "   \033[32m-----\033[m"
   echo -e "   \033[1mDoing some pre-script tasks ..\033[m"
   echo -e "   \033[32m-----\033[m"
   echo ""
fi

echononl "   Backup vhost directory \033[1m${_vhost_base_dir}\033[m"
cp -a "${_vhost_base_dir}" "${_vhost_base_dir}.${backup_date}" > $log_file 2>&1
if [[ $? -eq 0 ]]; then
   echo_ok
else
   echo_failed
   error "$(cat $log_file)"
fi


# ----------
# - Main part of script
# ----------

if $terminal ; then
   echo ""
   echo ""
   echo -e "   \033[32m-----\033[m"
   echo -e "   \033[1mMain part of script ..\033[m"
   echo -e "   \033[32m-----\033[m"
fi

_changed=false
for __version in ${_major_php_verisons} ; do

   if $terminal ; then
      echo ""
      echo -e "   Check socket path for PHP version $__version"
      echo ""
   fi
   _changed_version=false

   if [[ -S "/tmp/php-${__version}-fpm.www.sock" ]]; then
      _socket_path="/tmp"
   elif [[ -S "/run/php/php-${__version}-fpm.www.sock" ]]; then
      _socket_path="/run/php"
   else
      warn "No PHP socket file found for version $__version .."
      continue
   fi


   for _file in $(ls -d ${_vhost_base_dir}/*) ; do

      if [[ -d "$_file" ]] ; then
         continue
      fi
      if [[ -h "$_file" ]]; then
         continue
      fi

      if  grep -q -e "${__version}-fpm.www.sock" "$_file" > /dev/null 2>&1 ; then

         if ! grep -q -e "${_socket_path}/php-${__version}-fpm.www.sock" "$_file" > /dev/null 2>&1 ; then

            echononl "   Change vhost configuration \033[1m$(basename "$_file")\033[m"

            perl -i -n -p -e "s#(.+proxy:unix:).+${__version}-fpm.www.sock(\|.*)#\1${_socket_path}/php-${__version}-fpm.www.sock\2#" $_file > $log_file 2>&1
            if [[ $? -eq 0 ]]; then
               echo_ok
            else
               echo_failed
               error "$(cat $log_file)"
            fi
            _changed=true
            _changed_version=true
         fi
      fi

   done

   if ! $_changed_version ; then
      echo -e "   -- \033[33mNothing to do\033[m --"
   fi

done



# ----------
# - Some post-script tasks ..
# ----------

if $terminal ; then
   echo ""
   echo ""
   echo -e "   \033[32m-----\033[m"
   echo -e "   \033[1mDoing some post-script tasks ..\033[m"
   echo -e "   \033[32m-----\033[m"
   echo ""
fi

echononl "   Restart apache webservice.."
if $_changed ; then
   systemctl restart apache2 > $log_file 2>&1
   if [[ $? -eq 0 ]]; then
      echo_ok
      _changed=true
   else
      echo_failed
      error "$(cat $log_file)"
   fi
else
   echo_skipped

   echo ""
   echo "   Nothing has changed"
   echononl "   Remove previously created backup of '${_vhost_base_dir}'."
   rm -rf "${_vhost_base_dir}.${backup_date}" > $log_file 2>&1
   if [[ $? -eq 0 ]]; then
      echo_ok
      _changed=true
   else
      echo_failed
      error "$(cat $log_file)"
   fi
fi


clean_up 0