#!/bin/sh
set -e

BUILD_VERSION={version}
UPDATER={updater}

# Deal with existing nzbdrone installs
#
# Existing nzbdrone packages do not have startup scripts and the process might still be running.
# If the user manually installed nzbdrone then the process might still be running too.
if [ $1 = "install" ]; then
  psNzbDrone=`ps ax -o'user:20,pid,ppid,unit,args' | grep mono.*NzbDrone\\\\.exe || true`
  if [ ! -z "$psNzbDrone" ]; then
    # Get the user and optional systemd unit
    psNzbDroneUser=`echo "$psNzbDrone" | tr -s ' ' | cut -d ' ' -f 1`
    psNzbDroneUnit=`echo "$psNzbDrone" | tr -s ' ' | cut -d ' ' -f 4`
    # Get the appdata from the cmdline or get it from the user dir
    droneAppData=`echo "$psNzbDrone" | tr ' ' '\n' | grep -- "-data=" | cut -d= -f 2`
    if [ "$droneAppData" = "" ]; then
      droneUserHome=`getent passwd $psNzbDroneUser | cut -d ':' -f 6`
      droneAppData="$droneUserHome/.config/NzbDrone"
    fi

    if [ "$psNzbDroneUnit" != "-" ] && [ -d /run/systemd/system ]; then
      if [ "$psNzbDroneUnit" = "sonarr.service" ]; then
        # Conflicts with our new sonarr.service so we have to remove it
        echo "NzbDrone systemd startup detected at $psNzbDroneUnit, stopping and removing..."
        deb-systemd-invoke stop $psNzbDroneUnit >/dev/null
        if [ -f "/etc/systemd/system/$psNzbDroneUnit" ]; then
          rm /etc/systemd/system/$psNzbDroneUnit
        fi
        if [ -f "/usr/lib/systemd/system/$psNzbDroneUnit" ]; then
          rm /usr/lib/systemd/system/$psNzbDroneUnit
        fi
        deb-systemd-helper purge $psNzbDroneUnit >/dev/null
		    deb-systemd-helper unmask $psNzbDroneUnit >/dev/null
        systemctl --system daemon-reload >/dev/null || true
      else
        # Just disable it, so the user can revisit the settings later
        echo "NzbDrone systemd startup detected at $psNzbDroneUnit, stopping and disabling..."
        deb-systemd-invoke stop $psNzbDroneUnit >/dev/null
        deb-systemd-invoke mask $psNzbDroneUnit >/dev/null
      fi
    else
      # We don't support auto migration for other startup methods, so bail.
      # This leaves the sonarr package in an incomplete state.
      echo "ps: $psNzbDrone"
      echo "Error: An existing Sonarr v2 (NzbDrone) process is running. Remove the NzbDrone auto-startup prior to installing sonarr."
      exit 1
    fi

    # We don't have the debconf configuration yet so we can't migrate the data.
    # Instead we symlink so postinst knows where it's at.
    if [ -f "/usr/lib/sonarr/nzbdrone-appdata" ]; then
      rm "/usr/lib/sonarr/nzbdrone-appdata"
    else
      mkdir -p "/usr/lib/sonarr"
    fi
    ln -s $droneAppData /usr/lib/sonarr/nzbdrone-appdata
  fi
fi

#BEGIN BUILTIN UPDATER
# Check for supported upgrade paths
if [ $1 = "upgrade" ] && [ "$UPDATER" = "BuiltIn" ] && [ -f /usr/lib/sonarr/bin/release_info ]; then
  # If we allow the Built-In updater to upgrade from 3.0.1.123 to 3.0.2.500 and now apt is catching up to 3.0.2.425
  # then we need to deal with that 500->425 'downgrade'.
  # We do that by preserving the binaries and using those instead for postinst.

  currentVersion=`cat /usr/lib/sonarr/bin/release_info | grep 'ReleaseVersion=' | cut -d= -f 2`
  currentRelease=`echo "$currentVersion" | cut -d. -f1,2,3`
  currentBuild=`echo "$currentVersion" | cut -d. -f4`
  targetVersion=$BUILD_VERSION
  targetRelease=`echo "$targetVersion" | cut -d. -f1,2,3`
  targetBuild=`echo "$targetVersion" | cut -d. -f4`

  if [ -d /usr/lib/sonarr/bin_patch ]; then
    rm -rf /usr/lib/sonarr/bin_patch
  fi

  # Check if the existing version is already an upgrade for the included build
  if [ "$currentRelease" = "$targetRelease" ] && [ "$currentBuild" -gt "$targetBuild" ]; then
    echo "Preserving $currentVersion from BuiltIn updater instead of downgrading to $targetVersion"
    cp -r /usr/lib/sonarr/bin /usr/lib/sonarr/bin_patch
  fi
fi
#END BUILTIN UPDATER

#DEBHELPER#

exit 0