#!/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 | grep -ohe 'up .*' | sed 's/,//g' | awk '{ printf $2" "$3 }' > ./${UPTIME_POS}_uptime
fi

if [ $SHOW_LOAD = 1 ]; then
    cat /proc/loadavg | awk '{print $1}' > ./${LOAD_POS}_load
fi

if [ $SHOW_PROCESSES = 1 ]; then
    ps aux | wc -l > ./${PROCESSES_POS}_processes
fi

if [ $SHOW_MEM_USAGE = 1 ]; then
    free -m | awk '/Mem:/ { total=$2 } /buffers\/cache/ { used=$3 } END { printf("%3.1f%%", used/total*100)}' > ./${MEM_USAGE_POS}_mem_usage
fi

if [ $SHOW_SWAP_USAGE = 1 ]; then
    SWAP=`free -m | awk '/Swap/ {print($2)}'`
    if [ $SWAP -gt 0 ]; then
        free -m | awk '/Swap/ { printf("%3.1f%%", $3/$2*100) }' > ./${SWAP_USAGE_POS}_swap_usage
    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
        VALUE=`ps -p ${vdr_pid} -o %cpu | awk 'NR==2{print $0}' | tr -d ' '`
        echo "${VALUE}%" > ./${VDR_CPU_USAGE_POS}_vdr_cpu_usage
    fi
fi

if [ $SHOW_VDR_MEM_USAGE = 1 ]; then
    vdr_pid=`pidof vdr`
    if [ $? = 0 ]; then
        VALUE=`ps -p ${vdr_pid} -o %mem | awk 'NR==2{print $0}' | tr -d ' '`
        echo "${VALUE}%" > ./${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