# Extract specified value from override file if it exists (Null if not)
GetOverride() {

    Retval=""

    # Don't know if we have pushd so do it long hand
    CurrDir="$(pwd)"

    # Find the metadata dir if customized
    if [ -e /etc/systemd/system/plexmediaserver.service.d ]; then

      # Get there
      cd /etc/systemd/system/plexmediaserver.service.d

      # Glob up all 'conf files' found
      ConfFile="$(find override.conf local.conf *.conf 2>/dev/null | head -1)"

      # If there is one, search it
      if [ "$ConfFile" != "" ]; then
        Retval="$(grep "$1" $ConfFile | head -1 | sed -e "s/.*${1}=//" | tr -d \" | tr -d \')"
      fi

    fi

    # Go back to where we were
    cd "$CurrDir"

    # What did we find
    echo "$Retval"
}

# Universal output function
Output() {
  if [ $Scripted -gt 0 ]; then
    echo \[$(date "+%Y-%m-%d %H.%M.%S")\] "$@"
  else
    echo "$@"
  fi
  # $LOG_TOOL \[$(date "+%Y-%m-%d %H.%M.%S")\] "$@"
}

# Determine which host we are running on and set variables
HostConfig() {

  # On all hosts except Mac
  PIDOF="pidof"
  STATFMT="-c"
  STATBYTES="%s"
  STATPERMS="%a"

  # On all hosts except QNAP
  DFFLAGS="-m"

  # Synology (DSM 7)
  if [ -d /var/packages/PlexMediaServer ] && \
     [ -d "/var/packages/PlexMediaServer/shares/PlexMediaServer/AppData/Plex Media Server" ]; then

    # Where is the software
    PKGDIR="/var/packages/PlexMediaServer/target"
    PLEX_SQLITE="$PKGDIR/Plex SQLite"
    LOG_TOOL="logger"

    # Where is the data
    AppSuppDir="/var/packages/PlexMediaServer/shares/PlexMediaServer/AppData"
    DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
    LOGFILE="$DBDIR/DBRepair.log"

    # We are done
    HostType="Synology (DSM 7)"

    # We do have start/stop as root
    HaveStartStop=1
    StartCommand="/usr/syno/bin/synopkg start PlexMediaServer"
    StopCommand="/usr/syno/bin/synopkg stop PlexMediaServer"
    return 0

  # Synology (DSM 6)
  elif [ -d "/var/packages/Plex Media Server" ] && \
       [ -f "/usr/syno/sbin/synoshare" ]; then

    # Where is the software
    PKGDIR="/var/packages/Plex Media Server/target"
    PLEX_SQLITE="$PKGDIR/Plex SQLite"
    LOG_TOOL="logger"

    # Get shared folder path
    AppSuppDir="$(synoshare --get Plex | grep Path | awk -F\[ '{print $2}' | awk -F\] '{print $1}')"

    # Where is the data
    AppSuppDir="$AppSuppDir/Library/Application Support"
    if [ -d "$AppSuppDir/Plex Media Server" ]; then

      DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
      PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
      LOGFILE="$DBDIR/DBRepair.log"

      HostType="Synology (DSM 6)"

      # We do have start/stop as root
      HaveStartStop=1
      StartCommand="/usr/syno/bin/synopkg start PlexMediaServer"
      StopCommand="/usr/syno/bin/synopkg stop PlexMediaServer"
      return 0
    fi


  # QNAP (QTS & QuTS)
  elif [ -f /etc/config/qpkg.conf ]; then

    # Where is the software
    PKGDIR="$(getcfg -f /etc/config/qpkg.conf PlexMediaServer Install_path)"
    PLEX_SQLITE="$PKGDIR/Plex SQLite"
    LOG_TOOL="/sbin/log_tool -t 0 -a"

    # Where is the data
    AppSuppDir="$PKGDIR/Library"
    DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
    LOGFILE="$DBDIR/DBRepair.log"

    # Start/Stop
    if [ -e /etc/init.d/plex.sh ]; then
      HaveStartStop=1
      StartCommand="/etc/init.d/plex.sh start"
      StopCommand="/etc/init.d/plex.sh stop"
    fi

    # Use custom DFFLAGS (force POSIX mode)
    DFFLAGS="-Pm"

    HostType="QNAP"
    return 0

  # SNAP host (check before standard)
  elif [ -d "/var/snap/plexmediaserver/common/Library/Application Support/Plex Media Server" ]; then

    # Where things are
    PLEX_SQLITE="/snap/plexmediaserver/current/Plex SQLite"
    AppSuppDir="/var/snap/plexmediaserver/common/Library/Application Support"
    PID_FILE="$AppSuppDir/plexmediaserver.pid"
    DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    LOGFILE="$DBDIR/DBRepair.log"
    LOG_TOOL="logger"

    HaveStartStop=1
    StartCommand="snap start plexmediaserver"
    StopCommand="snap stop plexmediaserver"

    HostType="SNAP"
    return 0

  # Standard configuration Linux host
  elif [ -f /etc/os-release ]          && \
       [ -d /usr/lib/plexmediaserver ] && \
       [ -d /var/lib/plexmediaserver ]; then

    # Where is the software
    PKGDIR="/usr/lib/plexmediaserver"
    PLEX_SQLITE="$PKGDIR/Plex SQLite"
    LOG_TOOL="logger"

    # Where is the data
    AppSuppDir="/var/lib/plexmediaserver/Library/Application Support"
    # DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    # PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"

    # Find the metadata dir if customized
    if [ -e /etc/systemd/system/plexmediaserver.service.d ]; then

      # Get custom AppSuppDir if specified
      NewSuppDir="$(GetOverride PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR)"

      if [ -d "$NewSuppDir" ]; then
          AppSuppDir="$NewSuppDir"
      else
          Output "Given application support directory override specified does not exist: '$NewSuppDir'. Ignoring."
      fi
    fi

    DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
    LOGFILE="$DBDIR/DBRepair.log"

    HostType="$(grep ^PRETTY_NAME= /etc/os-release | sed -e 's/PRETTY_NAME=//' | sed -e 's/"//g')"

    HaveStartStop=1
    StartCommand="systemctl start plexmediaserver"
    StopCommand="systemctl stop plexmediaserver"
    return 0

  # Netgear ReadyNAS
  elif [ -e /etc/os-release ] && [ "$(cat /etc/os-release | grep ReadyNASOS)" != "" ]; then

    # Find PMS
    if [ "$(echo /apps/plexmediaserver*)" != "/apps/plexmediaserver*" ]; then

      PKGDIR="$(echo /apps/plexmediaserver*)"

      # Where is the code
      PLEX_SQLITE="$PKGDIR/Binaries/Plex SQLite"
      AppSuppDir="$PKGDIR/MediaLibrary"
      PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
      DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
      LOGFILE="$DBDIR/DBRepair.log"
      LOG_TOOL="logger"

      HaveStartStop=1
      StartCommand="systemctl start fvapp-plexmediaserver"
      StopCommand="systemctl stop fvapp-plexmediaserver"

      HostType="Netgear ReadyNAS"
      return 0
    fi

  # ASUSTOR
  elif [ -f /etc/nas.conf ] && grep ASUSTOR /etc/nas.conf >/dev/null && \
       [ -d "/volume1/Plex/Library/Plex Media Server" ];  then

    # Where are things
    PLEX_SQLITE="/volume1/.@plugins/AppCentral/plexmediaserver/Plex SQLite"
    AppSuppDir="/volume1/Plex/Library"
    PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
    DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    LOGFILE="$DBDIR/DBRepair.log"
    LOG_TOOL="logger"

    HostType="ASUSTOR"
    return 0


  # Apple Mac
  elif [ -d "/Applications/Plex Media Server.app" ] && \
       [ -d "$HOME/Library/Application Support/Plex Media Server" ]; then

    # Where is the software
    PLEX_SQLITE="/Applications/Plex Media Server.app/Contents/MacOS/Plex SQLite"
    AppSuppDir="$HOME/Library/Application Support"
    DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    PID_FILE="$DBDIR/dbtmp/plexmediaserver.pid"
    LOGFILE="$DBDIR/DBRepair.log"
    LOG_TOOL="logger"

    # MacOS uses pgrep and uses different stat options
    PIDOF="pgrep"
    STATFMT="-f"
    STATBYTES="%z"
    STATPERMS="%A"

    # Root not required on MacOS.  PMS runs as username.
    RootRequired=0

    # make the TMP directory in advance to store plexmediaserver.pid
    mkdir -p "$DBDIR/dbtmp"

    # Remove stale PID file if it exists
    [ -f "$PID_FILE" ] && rm "$PID_FILE"

    # If PMS is running create plexmediaserver.pid
    PIDVALUE=$($PIDOF "Plex Media Server")
    [ $PIDVALUE ] && echo $PIDVALUE > "$PID_FILE"

    HostType="Mac"
    return 0

  # Western Digital (OS5)
  elif [ -f /etc/system.conf ] && [ -d /mnt/HD/HD_a2/Nas_Prog/plexmediaserver ] && \
       grep "Western Digital Corp" /etc/system.conf >/dev/null; then

    # Where things are
    PLEX_SQLITE="/mnt/HD/HD_a2/Nas_Prog/plexmediaserver/binaries/Plex SQLite"
    AppSuppDir="$(echo /mnt/HD/HD*/Nas_Prog/plex_conf)"
    PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
    DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    LOGFILE="$DBDIR/DBRepair.log"
    LOG_TOOL="logger"

    HostType="Western Digital"
    return 0


  # -  Docker cgroup v1 & v2
  # -  Podman (libpod)
  # -  Kubernetes (and TrueNAS platforms)
  elif [ "$(grep docker /proc/1/cgroup | wc -l)" -gt 0 ] || [ "$(grep 0::/ /proc/1/cgroup)" = "0::/" ] ||
       [ "$(grep libpod /proc/1/cgroup | wc -l)" -gt 0 ] || [ "$(grep kube /proc/1/cgroup | wc -l)" -gt 0 ]; then

    # HOTIO Plex image structure is non-standard (contains symlink which breaks detection)
    if [ -n "$(grep -irslm 1 hotio /etc/s6-overlay/s6-rc.d)" ]; then
      PLEX_SQLITE=$(find /app/usr/lib/plexmediaserver /usr/lib/plexmediaserver -maxdepth 0 -type d -print -quit 2>/dev/null); PLEX_SQLITE="$PLEX_SQLITE/Plex SQLite"
      AppSuppDir="/config"
      PID_FILE="$AppSuppDir/plexmediaserver.pid"
      DBDIR="$AppSuppDir/Plug-in Support/Databases"
      LOGFILE="$DBDIR/DBRepair.log"
      LOG_TOOL="logger"
      if [ -d "/run/service/plex" ] || [ -d "/run/service/service-plex" ]; then
        SERVICE_PATH=$([ -d "/run/service/plex" ] && echo "/run/service/plex" || [ -d "/run/service/service-plex" ] && echo "/run/service/service-plex")
        HaveStartStop=1
        StartCommand="s6-svc -u $SERVICE_PATH"
        StopCommand="s6-svc -d $SERVICE_PATH"
      fi

      HostType="HOTIO"
      return 0

    # Docker (All main image variants except binhex and hotio)
    elif [ -d "/config/Library/Application Support" ]; then

      PLEX_SQLITE="/usr/lib/plexmediaserver/Plex SQLite"
      AppSuppDir="/config/Library/Application Support"
      PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
      DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
      LOGFILE="$DBDIR/DBRepair.log"
      LOG_TOOL="logger"

      # Miscellaneous start/stop methods
      if [ -d "/var/run/service/svc-plex" ]; then
        HaveStartStop=1
        StartCommand="s6-svc -u /var/run/service/svc-plex"
        StopCommand="s6-svc -d /var/run/service/svc-plex"
      fi

      if [ -d "/var/run/s6/services/plex" ]; then
        HaveStartStop=1
        StartCommand="s6-svc -u /var/run/s6/services/plex"
        StopCommand="s6-svc -d /var/run/s6/services/plex"
      fi

      HostType="Docker"
      return 0

    # BINHEX Plex image
    elif [ -e /etc/os-release ] &&  grep "IMAGE_ID=archlinux" /etc/os-release  1>/dev/null  && \
         [ -e /home/nobody/start.sh ] &&  grep PLEX_MEDIA /home/nobody/start.sh 1> /dev/null ; then

      PLEX_SQLITE="/usr/lib/plexmediaserver/Plex SQLite"
      AppSuppDir="/config"
      PID_FILE="$AppSuppDir/Plex Media Server/plexmediaserver.pid"
      DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
      LOGFILE="$DBDIR/DBRepair.log"
      LOG_TOOL="logger"

      HostType="BINHEX"
      return 0

    fi

  # Last chance to identify this host
  elif [ -e /etc/os-release ]; then

    # Arch Linux (must check for native Arch after binhex)
    if [ "$(grep -E '=arch|="arch"' /etc/os-release)" != "" ] && \
       [ -d /usr/lib/plexmediaserver ] && \
       [ -d /var/lib/plex ]; then

      # Where is the software
      PKGDIR="/usr/lib/plexmediaserver"
      PLEX_SQLITE="$PKGDIR/Plex SQLite"
      LOG_TOOL="logger"

      # Where is the data
      AppSuppDir="/var/lib/plex"

      # Find the metadata dir if customized
      if [ -e /etc/systemd/system/plexmediaserver.service.d ]; then

        # Get custom AppSuppDir if specified
        NewSuppDir="$(GetOverride PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR)"

        if [ "$NewSuppDir" != "" ]; then
          if [ -d "$NewSuppDir" ]; then
            AppSuppDir="$NewSuppDir"
          else
            Output "Given application support directory override specified does not exist: '$NewSuppDir'. Ignoring."
          fi
        fi
      fi

      DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
      LOGFILE="$DBDIR/DBRepair.log"
      LOG_TOOL="logger"
      HostType="$(grep PRETTY_NAME /etc/os-release | sed -e 's/^.*="//' | tr -d \" )"

      HaveStartStop=1
      StartCommand="systemctl start plexmediaserver"
      StopCommand="systemctl stop plexmediaserver"
      return 0
    fi
  fi


  # Unknown / currently unsupported host
  return 1
}