#!/bin/sh -e

NAME=fah-client
CLIENT_CONFIG=/etc/$NAME
CLIENT_HOME=/var/lib/$NAME
CLIENT_LOGS=/var/log/$NAME

# Create directories
install -d -m 755 -o $NAME -g $NAME $CLIENT_HOME $CLIENT_LOGS $CLIENT_CONFIG

# Migrate v7 configuration

# Remove obsolete symlink installed by previous v8 packages
[ -L $CLIENT_HOME/config.xml ] && rm -f $CLIENT_HOME/config.xml || true

if [ ! -e $CLIENT_CONFIG/config.xml ]; then
  if [ -f /etc/fahclient/config.xml ]; then
    cp --remove-destination /etc/fahclient/config.xml $CLIENT_CONFIG/
    echo
    echo "v7 client configuration copied to $CLIENT_CONFIG/config.xml"
    echo
    echo "It's recommended to purge the old package to remove leftover files:"
    echo
    echo "  sudo apt purge fahclient"
  elif [ -f $CLIENT_HOME/config.xml ]; then
    mv -f $CLIENT_HOME/config.xml $CLIENT_CONFIG/
  else
    echo "<config/>" > $CLIENT_CONFIG/config.xml
  fi

  chown $NAME:$NAME $CLIENT_CONFIG/config.xml
  chmod 0644 $CLIENT_CONFIG/config.xml

elif [ -f $CLIENT_HOME/config.xml ]; then
  echo
  echo "Warning: $CLIENT_HOME/config.xml ignored, using $CLIENT_CONFIG/config.xml"
fi

systemctl daemon-reload || true

# Add/update state file, required for purge action in postrm
deb-systemd-helper update-state $NAME.service || true

# Only enable on initial install
if [ -z "$2" ]; then
  systemctl -q enable $NAME || true
  systemctl start $NAME || true
else
  # Upgrade
  # Reenable if fixing broken symlink
  if dpkg --compare-versions "$2" lt 8.2.1; then
    systemctl -q enable $NAME || true
  fi

  systemctl restart $NAME || true
fi

echo
echo "The Folding@home client is now installed"
echo
echo "File locations:"
echo
echo "  Logs: /var/log/$NAME"
echo "  Data: /var/lib/$NAME"
echo
echo "Service commands:"
echo
echo "  systemctl status --no-pager -l $NAME"
echo "  sudo systemctl start $NAME"
echo "  sudo systemctl stop $NAME"
echo "  sudo systemctl restart $NAME"
echo
echo "Access the web interface by going to:"
echo
echo "  https://v8-4.foldingathome.org/"
echo