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

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

  # 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

    HostType="QNAP"
    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

      # Glob up all 'conf files' found
      NewSuppDir="$(cd /etc/systemd/system/plexmediaserver.service.d ; \
                    cat override.conf local.conf *.conf 2>/dev/null | grep "APPLICATION_SUPPORT_DIR" | head -1)"

      if [ "$NewSuppDir" != "" ]; then
        NewSuppDir="$(echo $NewSuppDir | sed -e 's/.*_DIR=//' | tr -d '"' | tr -d "'")"

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

    DBDIR="$AppSuppDir/Plex Media Server/Plug-in Support/Databases"
    PID_FILE="$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"

      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

  # Containers:
  # -  Docker cgroup v1 & v2
  # -  Podman (libpod)
  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 ]; then

    # HOTIO Plex image structure is non-standard (contains symlink which breaks detection)
    if  [ -d "/app/usr/lib/plexmediaserver" ] && [ -d "/config/Plug-in Support" ]; then
      PLEX_SQLITE="/app/usr/lib/plexmediaserver/Plex SQLite"
      AppSuppDir="/config"
      PID_FILE="$AppSuppDir/plexmediaserver.pid"
      DBDIR="$AppSuppDir/Plug-in Support/Databases"
      LOGFILE="$DBDIR/DBRepair.log"
      LOG_TOOL="logger"

      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"

      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

      # lsio stop
      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

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

      HostType="Docker"
      return 0

    # BINHEX Plex image
    elif [-f /usr/lib/python3.10/binhex.py ] && [ -d "/config/Plex Media Server" ]; 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


  # 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

  # 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"

    # 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
  fi

  # Unknown / currently unsupported host
  return 1
}