#!/usr/bin/env bash

_date=`date +%Y-%m-%d-%H%M`

vhost_dir=/usr/local/apache2/conf/vhosts
target_dir=$vhost_dir
#target_dir=/root/tmp
ipv4=83.223.86.82
ipv6="2a01:30:0:13:26f:6dff:feb9:9d11"
_cert_default=/usr/local/apache2/conf/server-bundle.crt
_key_default=/usr/local/apache2/conf/server.key

file_suffixes="conf mod_php php-fpm mod_fcgid mod_php redirect"

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

## - 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
}

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$$
}

fatal(){
   echo ""
   echo -e "fataler Fehler: $*"
   echo ""
   echo -e "\t\033[31m\033[1mInstalllation wird abgebrochen\033[m\033[m"
   echo ""
   exit 1
}

error(){
   echo ""
   echo -e "\t[ \033[31m\033[1mFehler\033[m ]: $*"
   echo ""
}

warn (){
   echo ""
   echo -e "\t[ \033[33m\033[1mWarning\033[m ]: $*"
   echo ""
}

info (){
   echo ""
   echo -e "\t[ \033[32m\033[1mInfo\033[m ]: $*"
   echo ""
}

echo_done() {
   echo -e "\033[75G[ \033[32mdone\033[m ]"
}
echo_ok() {
   echo -e "\033[75G[ \033[32mok\033[m ]"
}
echo_warning() {
   echo -e "\033[75G[ \033[33m\033[1mwarn\033[m ]"
}
echo_failed(){
   echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
}
echo_skipped() {
   echo -e "\033[75G[ \033[33m\033[1mskipped\033[m ]"
}


echo ""

if [[ "$vhost_dir" = "$target_dir" ]]; then
   cp -a $vhost_dir ${vhost_dir}.$_date
   vhost_dir=${vhost_dir}.$_date
fi

declare -a vhost_arr_tmp
while IFS='' read -r -d '' _file ; do

   [[ -h "$_file" ]] && continue
   vhost_arr_tmp+=("$_file")

done < <(find $vhost_dir -mindepth 1 -maxdepth 1 -type f -print0)

# - Sort array
# -
IFS=$'\n' vhost_arr=($(sort <<<"${vhost_arr_tmp[*]}"))
unset IFS

declare -a file_suffixe_arr
for _suffix in $file_suffixes ; do
   file_suffixe_arr+=("$_suffix")
done

declare -i number=0
declare -a file_already_ok_arr
declare -a file_not_converted_arr
declare -a file_ipv4_ok_arr
declare -a file_ipv6_ok_arr
for _file in ${vhost_arr[@]} ; do

   # - For testing
   # -
   #if [[ $number -gt 3 ]]; then
   #   break
   #fi

   echononl "   Working on $(basename $_file) .."

   if [[ "$(basename $_file)" =~ ^00 ]] ; then
      echo_skipped
      info "File $(basename $_file) left unchanged"
      file_not_converted_arr+=("$_file")
      continue
   fi

   _found=false
   for _suffix in ${file_suffixe_arr[@]} ; do
      if [[ "$_suffix" = "${_file##*.}" ]]; then
         _found=true
         break
      fi
   done

   if ! $_found ; then
      echo_failed
      error "File $(basename $_file) was not edited. Wrong suffix \"${_file##*.}\""
      file_not_converted_arr+=("$_file")
      continue
   fi
   

   _basename_file=$(basename $_file)

   https_ipv4=false
   https_ipv6=false

   if grep -i -E "^\s*<VirtualHost\s+[0-9.]+:443" $_file> /dev/null 2>&1 ; then
      https_ipv4=true
   fi
   if grep -i -E "^\s*<VirtualHost\s+\[[a-f0-9:]+\]:443>" $_file> /dev/null 2>&1 ; then
      https_ipv6=true
   fi

   if $https_ipv4 && $https_ipv6 ; then
      file_already_ok_arr+=("$_file")
      echo_skipped
      info "File $(basename $_file) already converted.."
      continue
   fi

   if $https_ipv4 ; then
      file_ipv4_ok_arr+=("$_file")
   fi
   if $https_ipv6 ; then
      file_ipv6_ok_arr+=("$_file")
   fi

   > $target_dir/${_basename_file}.80
   > $target_dir/${_basename_file}.443
   > $target_dir/${_basename_file}
   server_name_found=false
   server_name=
   vhost_ipv4_80=false
   found_custom_log=false
   ssl_cert_found=false
   ssl_key_found=false
   ssl_cert=$_cert_default
   ssl_key=$_key_default
   server_aliases_arr=()
   while IFS='' read -r _line || [[ -n $_line ]] ; do

      if echo "$_line" | grep -i -E "^\s*</VirtualHost>" > /dev/null 2>&1 ; then
         vhost_ipv4_80=false
      fi

      if ! $ssl_cert_found && echo "$_line" | grep -E "^\s*SSLCertificateFile\s+" > /dev/null 2>&1 ; then
         ssl_cert_found=true
         ssl_cert=$(echo $_line | awk '{print$2}')
      fi
      if ! $ssl_key_found && echo "$_line" | grep -E "^\s*SSLCertificateKeyFile\s+" > /dev/null 2>&1 ; then
         ssl_key_found=true
         ssl_key=$(echo $_line | awk '{print$2}')
      fi

      if echo $_line | grep  -e "^\s*ServerAlias" > /dev/null 2>&1 ; then

         server_alias_tmp=$(echo $_line | sed -e "s/ServerAlias//" | sed "s/^\s*//" | sed "s/\s*$//")

         if [[ ${#server_aliases_arr[@]} -eq 0 ]] ; then
            for _alias in $server_alias_tmp ; do
               server_aliases_arr+=("$_alias")
            done
         else
            for _alias in $server_alias_tmp ; do
               containsElement "$_alias"  "${server_aliases_arr[@]}" && continue
               server_aliases_arr+=("$_alias")
            done
         fi
      fi


      if $vhost_ipv4_80 ; then
         if echo "$_line" | grep -i -E "^\s*CustomLog\s+" > /dev/null 2>&1 && ! $found_custom_log ; then
            echo "   SSLEngine on" >> $target_dir/${_basename_file}.443
            echo "" >> $target_dir/${_basename_file}.443
            echo "   SSLCertificateFile $ssl_cert" >> $target_dir/${_basename_file}.443
            echo "   SSLCertificateKeyFile $ssl_key" >> $target_dir/${_basename_file}.443
            echo "" >> $target_dir/${_basename_file}.443
            found_custom_log=true
         fi
         echo "$_line" >> $target_dir/${_basename_file}.80
         echo "$_line" >> $target_dir/${_basename_file}.443
      fi

      if echo "$_line" | grep -i -E "^\s*<VirtualHost\s+$ipv4:80" > /dev/null 2>&1 ; then
         vhost_ipv4_80=true
      fi

      if ! $server_name_found && echo "$_line" | grep -E "^\s*ServerName\s+" > /dev/null 2>&1 ; then
         server_name_found=true
         server_name=$(echo $_line | awk '{print$2}')
      fi

   done < "$_file"

   if [[ -z "$(cat $target_dir/${_basename_file}.80)" ]] ; then
      echo_failed
      error "File $(basename $_file) was not edited. Maybe no Configuration (for IPv4) found!"
      file_not_converted_arr+=("$_file")
      continue
   fi
                        

   let number++

   if [[ "$ssl_cert" != "$_cert_default" ]]; then
      perl -i -n -p -e "s#^(\s*)SSLCertificateFile\s+.*#\1SSLCertificateFile $ssl_cert#" \
         $target_dir/${_basename_file}.443
   fi
   if [[ "$ssl_key" != "$_key_default" ]]; then
      perl -i -n -p -e "s#^(\s*)SSLCertificateKeyFile\s+.*#\1SSLCertificateKeyFile $ssl_key#" \
         $target_dir/${_basename_file}.443
   fi


   # - Delete empty lines at the beginning
   # -
   while [[ "$(head -n 1 $target_dir/${_basename_file}.80)" =~ ^\s*$ ]] ; do 
      sed -i '1d' $target_dir/${_basename_file}.80
   done
   while [[ "$(head -n 1 $target_dir/${_basename_file}.443)" =~ ^\s*$ ]] ; do 
      sed -i '1d' $target_dir/${_basename_file}.443
   done

   # - Delete empty lines at the end
   # -
   while [[ "$(tail -n 1 $target_dir/${_basename_file}.80)" =~ ^\s*$ ]] ; do 
      sed -i '$ d' $target_dir/${_basename_file}.80
   done
   while [[ "$(tail -n 1 $target_dir/${_basename_file}.443)" =~ ^\s*$ ]] ; do 
      sed -i '$ d' $target_dir/${_basename_file}.443
   done

   echo "# --- $server_name" > $target_dir/${_basename_file}
   for _alias in "${server_aliases_arr[@]}" ; do
      echo "# --- $_alias" >> $target_dir/${_basename_file}
   done
   echo "" >> $target_dir/$(basename $_file)
   echo "<VirtualHost $ipv4:80>" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   cat $target_dir/${_basename_file}.80 >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   echo "</VirtualHost>" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   echo "<VirtualHost $ipv4:443>" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   cat $target_dir/${_basename_file}.443 >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   echo "</VirtualHost>" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}

   perl -i -n -p -e "s#^(\s*)CustomLog\s+/var/log/apache2/ipv4_requests.log\s+.*#\1CustomLog /var/log/apache2/ipv6_requests.log base_requests#" $target_dir/${_basename_file}.443

   perl -i -n -p -e "s#^(\s*)CustomLog\s+/var/log/apache2/ipv4_requests.log\s+.*#\1CustomLog /var/log/apache2/ipv6_requests.log base_requests#" $target_dir/${_basename_file}.80

   echo "# ---" >> $target_dir/${_basename_file}
   echo "# --- IPv6" >> $target_dir/${_basename_file}
   echo "# ---" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   echo "<VirtualHost [$ipv6]:80>" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   cat $target_dir/${_basename_file}.80 >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   echo "</VirtualHost>" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   echo "<VirtualHost [$ipv6]:443>" >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   cat $target_dir/${_basename_file}.443 >> $target_dir/${_basename_file}
   echo "" >> $target_dir/${_basename_file}
   echo "</VirtualHost>" >> $target_dir/${_basename_file}

   rm $target_dir/${_basename_file}.80
   rm $target_dir/${_basename_file}.443

   echo_done

done

echo
if [[ ${#file_already_ok_arr[@]} -gt 0 ]] ; then
   echo ""
   echo -e "\033[32m\033[1mFiles left unchanged\033[m:"
   for _file in ${file_already_ok_arr[@]} ; do
      echo "      $(basename $_file)"
   done
fi
echo ""

if [[ ${#file_ipv4_ok_arr[@]} -gt 0 ]]; then
   echo ""
   echo -e "\033[33m\033[1mIPv6 support was added on files\033[m:"
   for _file in ${file_ipv4_ok_arr[@]} ; do
      echo "      $(basename $_file)"
   done
fi
#if [[ ${#file_ipv6_ok_arr[@]} -gt 0 ]]; then
#   echo ""
#   echo -e "\033[37m\033[1mOriginally, no IPv4 support.\n\033[31m\033[1mFiles not converted:\033[m"
#   for _file in ${file_ipv6_ok_arr[@]} ; do
#      echo "      $(basename $_file)"
#   done
#fi

if [[ ${#file_not_converted_arr[@]} -gt 0 ]]; then
   echo ""
   echo -e "\033[31m\033[1mFiles ot converted\033[m:"
   for _file in ${file_not_converted_arr[@]}; do
      echo "   $(basename $_file)"
   done
fi

echo ""
exit 0