#!/usr/bin/bash
set -Eeuo pipefail
PATH=/nwp/bin:/bin:/usr/bin:/usr/local/bin

if [[ -w /var/www/html/rrd ]]; then
  cd /var/www/html/rrd
else
  set -x
  : local debug mode
fi

TZ=UTC
test -f /nwp/bin/syslogscan.rb || exit 0
tmp=z.syslog2-work
trap "rm -f ${tmp}.*" 0

: ${REFTIME:=$(date +'%Y-%m-%dT%H:00:00')}
rrdnow=$(date --date=${REFTIME} +%s)
s=$(( $rrdnow - 3600 ))
GREPPAT=$(date --date="@$s" +^%Y-%m-%dT%H:)

TAGLIST="feedstore gsm13 obsan obsbf jmxscan wisbf wistm gras gwjp gwde"

for tag in $TAGLIST
do
  heartbeat=7200
  if [[ gsm13 = $tag ]]; then
    heartbeat=43200
  fi
  if [[ ! -f ${tag}2.rrd ]]; then
    rrdcreate -b 'now - 2 day' ${tag}2.rrd --step 3600 \
      DS:count:GAUGE:${heartbeat}:U:U \
      DS:dlfiles:GAUGE:${heartbeat}:U:U \
      DS:elapsed:GAUGE:${heartbeat}:U:U \
      RRA:AVERAGE:0.5:1:2160 RRA:MAX:0.5:1:2160 \
      RRA:AVERAGE:0.5:24:720 RRA:MAX:0.5:24:720
  fi
done

egrep -h $GREPPAT /var/log/syslog{,.1}  > ${tmp}.1
syslogscan.rb  ${tmp}.1 > ${tmp}.2

ruby -- - $rrdnow ${tmp}.2 > ${tmp}.sh <<RUBY
#!/usr/bin/ruby
rrdnow=ARGV.shift
puts "set +e"
for line in ARGF
  tag=nil
  dlfiles=count=elapsed='U'
  for pair in line.chomp.split(/\t/)
    key,value=pair.split(/:/,2)
    case key
    when 'tag' then tag=value
    when 'count' then count=value.to_i
    when 'dlfiles' then dlfiles=value.to_i
    when 'elapsed' then elapsed=(value.to_f * 1000).to_i
    end
  end
  if tag then
    puts "test -f #{tag}2.rrd && rrdtool update #{tag}2.rrd #{rrdnow}:#{count}:#{dlfiles}:#{elapsed}"
  end
end
RUBY
# log file name doesnt begin with ${tmp} not to be removed by trap
test ! -f syslogrrd2.log || rm -f syslogrrd2.log
bash -x$- ${tmp}.sh > syslogrrd2.log 2>&1 || :

draw(){
  tag=$1
  suf=$2
  span=$3
  sspan="$4"
  rrdtool graph -o ${tag}2${suf}.png -t "${tag} (${sspan})" \
    -e ${rrdnow} -s end-${span} \
    DEF:count=${tag}2.rrd:count:AVERAGE \
    DEF:dlfiles=${tag}2.rrd:dlfiles:AVERAGE \
    DEF:elapsed=${tag}2.rrd:elapsed:AVERAGE \
    CDEF:esec=elapsed,1000,/ \
    LINE1:count#0088FF:"count" \
    LINE2:dlfiles#FF8800:"dlfiles" \
    LINE2:esec#88FF88:"elapsed(s)" \
    GPRINT:count:MAX:"count.max=%6.0lf" \
    GPRINT:count:LAST:" %6.0lf" \
    GPRINT:dlfiles:MAX:" dlfiles.max=%6.0lf" \
    GPRINT:dlfiles:LAST:" %6.0lf" \
    GPRINT:esec:MAX:" elapsed.max=%6.1lfs" \
    GPRINT:esec:LAST:" %6.1lfs" \
    > /dev/null
}

for tag in $TAGLIST
do
  draw $tag a 259200 "3 days"
  draw $tag b 2592000 "30 days"
  draw $tag c 31104000 "360 days"
done