#! /bin/bash

script_dir="$(dirname $(readlink -f $0))"

app_name='biscd'
install_dir="/opt/$app_name"
logging_dir="/var/log/$app_name"

systemd_service=`systemctl list-unit-files | cut -d ' ' -f 1 | grep -swcF "$app_name.service"` > 0

# exit when any command fails
set -e

function help () {
   echo "Usage: $0 [OPTIONS]"
   echo " -f     force uninstallation: Don't stop when something fails"
   echo ' -l     remove logfiles and logdirectory as well'
   echo ' -h     display this output.'
   echo ''
   echo "This script uninstalls $app_name. All application files will be removed,"
   echo 'as will the logrotate and apache config(section).'
   echo 'Apache will be reloaded in this process.'
   echo ''
   echo 'For more info visit https://git.sciuro.org/Burathar/biscd'
   exit 1
}

function echo_header () {
   echo -e "\e[33m== $1 ==\e[0;m"
}

while getopts 'flh' opt ; do
   case "$opt" in
      f) set +e; force='true';;
      l) delete_logs='true';;
      h) help ;;
   esac
done

# Make sure running as root
if [ `id -u` -ne 0 ]; then
   echo 'Please run as root'
   exit 1
fi

if [ "$force" != 'true' ]; then
   read -p "Are you sure you want to delete $app_name? Apache will be reloaded during this process (y/N) " confirm_delete
   [ -z "$confirm_delete" ] && confirm_delete='no' # if no input, assume no
   case ${confirm_delete:0:1} in
      n|N|0 )
         exit 0;;
   esac
fi

if [ "$delete_logs" != 'true' ]; then
   read -p "Do you wish to delete any $app_name log files as well? (y/N) " delete_logs
   [ -z "$delete_logs" ] && delete_logs='no' # if no input, assume no
   case ${delete_logs:0:1} in
      n|N|0 )
         delete_logs='false';;
      *)
         delete_logs='true';;
   esac
fi

echo_header "Removing Apache virtualhost"
rm -v "/etc/apache2/sites-enabled/$app_name.conf"
systemctl reload apache2.service


if [ "$systemd_service" -eq 1 ]; then
   echo_header "Removing Systemd service"
   systemctl stop "$app_name.service"
   sleep 1s
   systemctl disable "$app_name.service"
   rm "/etc/systemd/system/$app_name.service"
   systemctl daemon-reload
fi


echo_header "Removing $app_name user and group=="
deluser -q "$app_name"
delgroup -q "$app_name" && echo "group $app_name is removed, ignore previous warning" || true

echo_header "Removing application files"
rm -v "/etc/apache2/sites-available/$app_name.conf"
rm -v "/var/www/wsgi-scripts/$app_name.wsgi" || true
rm -vd "/var/www/wsgi-scripts/" || true
rm -vrf "/etc/$app_name"
rm -rf "$install_dir" && echo "removed '$install_dir'"

if [ "$delete_logs" = 'true' ]; then
echo_header "Removing logfiles"
   rm -vrf "$logging_dir"
fi

echo_header "Remaining artifacts(feel free to remove these manually)"
dpkg -l | grep libapache2-mod-wsgi-py3 | awk '{print $2}'
echo python3-venv

echo_header "$app_name is uninstalled!"

exit 0