#!/bin/bash

# this script will be executed when the widget will be drawn
# so make it short and fast

# enable/disable items
SHOW_SYS_VERSION=0
SHOW_KERNEL_VERSION=0
SHOW_UPTIME=1
SHOW_LOAD=1
SHOW_PROCESSES=1
SHOW_MEM_USAGE=1
SHOW_SWAP_USAGE=1
SHOW_ROOT_USAGE=1
SHOW_VIDEO_USAGE=1
SHOW_VDR_CPU_USAGE=1
SHOW_VDR_MEM_USAGE=1

SHOW_TEMPERATURES=0
SHOW_SYSUPDATES=0

# Position of items
# sys_version & kernel_version are drawn in one line
# all others will be drawn in two column
# for example
# System Version: Ubuntu 14.04.1 LTS
# Uptime: 1:20 5m       Load: 0.41

# must begin with 01
SYS_VERSION_POS="01"
KERNEL_VERSION_POS="02"
UPTIME_POS="03"
LOAD_POS="04"
PROCESSES_POS="05"
MEM_USAGE_POS="06"
SWAP_USAGE_POS="07"
ROOT_USAGE_POS="08"
VIDEO_USAGE_POS="09"
VDR_CPU_USAGE_POS="10"
VDR_MEM_USAGE_POS="11"

TEMP_CPU_POS=15
TEMP_PCCASE_POS=16
TEMP_GPU_POS=17

SYSUPD_POS=20
SYSSECUPD_POS=21

# mount point of vdr video disk
VIDEO_MOUNT="/media/video"


# force english output for filters
LANG=en_EN

# delete all files
rm -f [0-99]*

if [ $SHOW_SYS_VERSION = 1 ]; then
    cat /etc/os-release | grep "PRETTY_NAME=" | cut -d"\"" -f 2 > ./${SYS_VERSION_POS}_sys_version
fi

if [ $SHOW_KERNEL_VERSION = 1 ]; then
    uname -r > ./${KERNEL_VERSION_POS}_kernel_version
fi

if [ $SHOW_UPTIME = 1 ]; then
  UPTIME=($(cat /proc/uptime))  # UpTime in Array
  UPTIME[0]=${UPTIME[0]%.*}     # .* entfernen (UpTime in Sekunden)
  TAGE=$((UPTIME[0] / 86400)) ; STD=$((UPTIME[0] % 86400 / 3600))
  MIN=$((UPTIME[0] % 3600 / 60)) ; SEK=$((UPTIME[0] % 60))
  if [ $TAGE -ge 1 ] ; then
    echo "${TAGE}T ${STD}S ${MIN}M" > ./${UPTIME_POS}_uptime
  else
    [ $STD -ge 1 ] && echo -n "${STD} Std. " > ./${UPTIME_POS}_uptime
    echo "${MIN} Min." >> ./${UPTIME_POS}_uptime
  fi
fi

if [ $SHOW_LOAD = 1 ]; then
  LOADAVG=($(cat /proc/loadavg))   # Zeile in Array
  echo "${LOADAVG[0]//./,}" > ./${LOAD_POS}_load
fi

if [ $SHOW_PROCESSES = 1 ]; then
  PROCS=($(ls -d /proc/[0-9]*/))
  echo "${#PROCS[@]}" > ./${PROCESSES_POS}_processes
fi

if [ $SHOW_MEM_USAGE = 1 ]; then
  mapfile -t < <(free -m)    # Ausgabe von free in Array (Vier Zeilen)
  MEM=(${MAPFILE[1]})        # 2. Zeile
  BUF=(${MAPFILE[2]})        # 3. Zeile
  MEM_USAGE=$((${BUF[2]} * 1000 / ${MEM[1]}))
  [ $MEM_USAGE -lt 10 ] && MEM_USAGE="0${MEM_USAGE}"
  MEM_DEC=${MEM_USAGE: -1}
  echo "${MEM_USAGE:0: -1},${MEM_DEC}%" > ./${MEM_USAGE_POS}_mem_usage
fi

if [ $SHOW_SWAP_USAGE = 1 ]; then
  mapfile -t < <(free -m)    # Ausgabe von free in Array (Vier Zeilen)
  SWAP=(${MAPFILE[3]})       # 4. Zeile
  if [ ${SWAP[1]} -gt 0 ]; then # Swap Total
    if [ ${SWAP[2]} -gt 0 ]; then # Swap Used
      SWP=$((${SWAP[2]} * 1000 / ${SWAP[1]}))
      [ $SWP -lt 10 ] && SWP="0${SWP}"
      SWP_DEC=${SWP: -1} ; SWP=${SWP:0: -1},${SWP_DEC}
      echo "${SWP}%" > ./${SWAP_USAGE_POS}_swap_usage
    else
      echo "0,0%" > ./${SWAP_USAGE_POS}_swap_usage
    fi
  fi
fi

if [ $SHOW_ROOT_USAGE = 1 ]; then
    df -h / | awk '/\// {print $(NF-1)}' > ./${ROOT_USAGE_POS}_root_usage
fi

if [ $SHOW_VIDEO_USAGE = 1 ] && [ -d ${VIDEO_MOUNT} ]; then
    df -h ${VIDEO_MOUNT} | awk '/\// {print $(NF-1)}' > ./${VIDEO_USAGE_POS}_video_usage
fi

if [ $SHOW_VDR_CPU_USAGE = 1 ]; then
  vdr_pid=$(pidof vdr)
  if [ $? = 0 ]; then
    mapfile -t < <(ps -p ${vdr_pid} -o %cpu) # Ausgabe von ps in Array (Zwei Zeilen)
    CPU_USAGE=${MAPFILE[1]/./,}              # 24.2 -> 24,2
    echo "${CPU_USAGE}%" > ./${VDR_CPU_USAGE_POS}_vdr_cpu_usage
  fi
fi

if [ $SHOW_VDR_MEM_USAGE = 1 ]; then
  vdr_pid=$(pidof vdr)
  if [ $? = 0 ]; then
    mapfile -t < <(ps -p ${vdr_pid} -o %mem) # Ausgabe von ps in Array (Zwei Zeilen)
    VDR_MEM_USAGE=${MAPFILE[1]/./,}          # 24.2 -> 24,2
    echo "${VDR_MEM_USAGE}%" > ./${VDR_MEM_USAGE_POS}_vdr_mem_usage
  fi
fi

if [ $SHOW_TEMPERATURES = 1 ]; then
    ./../temperatures/temperatures
    if [ -f ./cpu ]; then
        mv ./cpu ${TEMP_CPU_POS}_cpu
    fi
    if [ -f ./pccase ]; then
        mv ./pccase ${TEMP_PCCASE_POS}_pccase
    fi
    if [ -f ./gpu ]; then
        mv ./gpu ${TEMP_GPU_POS}_gpu
    fi
fi

if [ $SHOW_SYSUPDATES = 1 ]; then
    if [ -f ./../system_updatestatus/updates ]; then
        cp ./../system_updatestatus/updates ${SYSUPD_POS}_updates
    fi
    if [ -f ./../system_updatestatus/security_updates ]; then
        cp ./../system_updatestatus/security_updates ${SYSSECUPD_POS}_security_updates
    fi
fi