#!/bin/sh

set -e

. /usr/share/debconf/confmodule

THIS_PACKAGE=cosmic-greeter
DEFAULT_DISPLAY_MANAGER_FILE=/etc/X11/default-display-manager

# debconf is not a registry, so we only fiddle with the default file if
# the configure script requested an update
if [ -e $DEFAULT_DISPLAY_MANAGER_FILE.debconf-update ]; then
  rm -f $DEFAULT_DISPLAY_MANAGER_FILE.debconf-update
  if db_get shared/default-x-display-manager; then
    # workaround debconf passthru bug (#379198)
    if [ -z "$RET" ]; then
      RET="$THIS_PACKAGE"
    fi
    if [ "$THIS_PACKAGE" != "$RET" ]; then
      echo "Please be sure to run \"dpkg --configure $RET\"."
    fi
    if db_get "$RET"/daemon_name; then
      echo "$RET" > $DEFAULT_DISPLAY_MANAGER_FILE
    fi
  fi
fi

DEFAULT_SERVICE=/etc/systemd/system/display-manager.service
# set default-display-manager systemd service link according to our config
if [ "$1" = configure ] && [ -d /etc/systemd/system/ ]; then
  if [ -e "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
    SERVICE=/lib/systemd/system/$(basename $(cat "$DEFAULT_DISPLAY_MANAGER_FILE")).service
    if [ -h "$DEFAULT_SERVICE" ] && [ $(readlink "$DEFAULT_SERVICE") = /dev/null ]; then
      echo "Display manager service is masked" >&2
    elif [ -e "$SERVICE" ]; then
      ln -sf "$SERVICE" "$DEFAULT_SERVICE"
    else
      echo "WARNING: $SERVICE is the selected default display manager but does not exist" >&2
      rm -f "$DEFAULT_SERVICE"
    fi
  else
    rm -f "$DEFAULT_SERVICE"
  fi
fi

# debconf hangs if cosmic-greeter gets started below without this
db_stop || true

#DEBHELPER#