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#!/bin/bash

PATH=/opt/rrdtool/bin:$PATH:/sbin:/usr/sbin

filename="teplota"

data_dir="/var/statistiky/system"
mkdir -p $data_dir

logdir=/var/log/statistiky
if [ ! -d ${logdir} ]
then
    mkdir -p ${logdir}
fi
logfile=${logdir}/${filename}.log

cd ${data_dir}

function create()
{
    local filename=$1
    echo "creating new ${filename}.rrd"
#
# sbirame s periodou 5 minut, tj. 12 PDP za hodinu
#
# za posledni tyden chceme vsechny 5min udaje => 12*24*9 = 2592 hodnot
# za posledni mesic chceme 20minutove useky (agg 4) => 3*24*38 = 2736 hodnot
# za posledni rok chceme dvouhodinove useky (agg 12) => 12*400 = 4800 hodnot
rrdtool create ${filename}.rrd --step 300 --start `date +%s`    \
                          DS:hdd_temp:GAUGE:500:0:100     \
                          RRA:AVERAGE:0.7:1:2592    \
                          RRA:MAX:0.7:4:2736       \
                          RRA:MIN:0.7:4:2736       \
                          RRA:AVERAGE:0.7:4:2736   \
                          RRA:MAX:0.7:24:4800      \
                          RRA:MIN:0.7:24:4800      \
                          RRA:AVERAGE:0.7:24:4800
}

function wait_to()
# $1 date for waiting to
{
    local time_now=`date +%s`;
    while [ $time_now -lt $1 ]
    do
        time_now=`date +%s`
        sleep 10;
    done
}

if [ ! -d ${data_dir} ]; then
    mkdir -p ${data_dir}
fi

function check_rrd_file()
{
    local filename=$1
    echo "Looking for ${filename}.rrd"
    if [ ! -f ${filename}.rrd ] ; then
        create ${filename}
        sleep 1;
    fi
}

start_time=`date +%s`
maininterval=$(( ( ${start_time} + 60 ) / 60 * 60 ))

while [ true ]
do

    check_rrd_file ${filename}
    
    echo "Wait to $maininterval [time: `date +%s`]"
    interval=$maininterval
    wait_to $interval
    timenow=`date +%s`
    fmt_time=`date "+%Y-%m-%d %T"`
    echo "Time now: ${fmt_time}"

    hdd_temp=`smartctl -d ata -a /dev/hda | grep ^194 | gawk '{print $10;}'`

    echo "${fmt_time}  HDD Temp: $hdd_temp" >>/var/log/statistiky/${filename}.log
    rrdtool update ${filename}.rrd ${timenow}:${hdd_temp}
    
    maininterval=$(( $maininterval + 300 ))
done