#!/bin/bash
#
# ========================================================================
#
# *
# * This file is part of MARS, the MAGIC Analysis and Reconstruction
# * Software. It is distributed to you in the hope that it can be a useful
# * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
# * It is distributed WITHOUT ANY WARRANTY.
# *
# * Permission to use, copy, modify and distribute this software and its
# * documentation for any purpose is hereby granted without fee,
# * provided that the above copyright notice appear in all copies and
# * that both that copyright notice and this permission notice appear
# * in supporting documentation. It is provided "as is" without express
# * or implied warranty.
# *
#
#
#   Author(s): Stefan Ruegamer 08/2008 <mailto:snruegam@astro.uni-wuerzburg.de>
#
#   Copyright: MAGIC Software Development, 2000-2008
#
#
# ========================================================================
#
# This script will read raw file tapes from La Palma. After specifying the
# tape number the tape will be loaded into a free or idle drive and the
# files will be extracted to the /data/fromtape directory. Then
# checkmd5sum will be started and, if successful, also movingrawfiles.
# After file extraction the tape drive will be switched to normal state
# again, and after successful md5 test the tape will be exported.
# The logfile can be found at /home/lapalma/tapecont/cont/muxdata/readlogs
#
# ToDo: check the available space on /data and /magic, so the user does no
#       longer have to do it. What's with the SATAs?
#       movingrawfiles, find source file if this script is in /tools!

#mars=`dirname $0 | sed -e 's/\/datacenter\/tools//'`
mars=`dirname $0 | sed -e 's/\/datacenter\/scripts//'`

echo -e "IMPORTANT: make sure that enough space is left on the FC and SATA arrays before executing this script! \n"

tape=$@
if [ "$tape" == "" ]
then
   echo "Please specify the tape number (e.g. 3MG005). The following foreign tapes have been found in the L700:"
   samcmd v 100 | grep "NOT SAM MEDIA" | grep -v "\-il---b-----" | cut -c 55-60 | sort
   read tape
   
   if [ "$tape" == "" ]
   then
      echo "No tape specified. Exiting."
      exit
   fi
fi

#mindataspace=
#minmagicspace=
magictapepath=/magic/datacenter/fromtape/
datatapepath=/data/fromtape/
logfile=/home/lapalma/tapecont/cont/muxdata/readlogs/tape_$tape.log
number=`echo $tape | cut -c 4-6`

if [ -f $logfile ]
then
   echo "logfile already existing -> aborting"
   exit
fi

# check if the tape is existing and which drives are free (---------p == present)
tapeslot=`samcmd v 100 | grep "$tape " | cut -c-4 | sed -e 's/ //g'`
drive=`samcmd s | grep /dev/rmt/10.cbn | grep "\---------p" | cut -d/ -f4 | cut -c1-3`

# if no drive is free, check for idle drives
if [ "$drive" == "" ]
then
   drive=`samcmd s | grep /dev/rmt/10.cbn | grep "\--l------r" | cut -d/ -f4 | cut -c1-3`
fi

if [ "$tapeslot" == "" ]
then
   echo "Tape $tape not found in the L700. Exiting."
   exit
fi

# in case that no drives are ready -> exit; in case more than one drive is ready, take the first one
if [ "$drive" == "" ]
then
   echo "No drive available for reading. Exiting."
   exit
else
   drive=`echo $drive | cut -c1-3`
fi

echo "Thank you. Your query is being processed. This will take some hours. Check the logfile $logfile for further information."

# check the available space on /magic and on /data; use preferably /data
#if [ $dataspace -gt $magicspace && $dataspace -gt $mindataspace ]
#then
#   echo "$dataspace available on /data. Changing directory to $datatapepath." >> $logfile 2>&1
#   cd $datatapepath >> $logfile 2>&1
#   tapepath=$datatapepath
#else
#   if [ $magicspace -gt $minmagicspace ]
#   then
#      echo "$magicspace available on /magic. Changing directory to $magictapepath." >> $logfile 2>&1
#      cd $magictapepath >> $logfile 2>&1
#      tapepath=$magictapepath
#   else
#      echo "Not enough space available for reading tapes (/data: $dataspace, /magic: $magicspace). Exiting."
#      exit
#   fi
#fi

date >> $logfile 2>&1
echo "Loading tape $tape from slot $tapeslot into drive ${drive}cbn..." >> $logfile 2>&1

# set the drive to unavail status; -w checks if the drive is really free
set_state -w unavail $drive ; load 100:$tapeslot $drive

# check if the drive is ready for reading
while [ "`samcmd s | grep /dev/rmt/${drive}cbn | grep "\---------r"`" == "" ]
do
   sleep 5
done

cd $datatapepath >> $logfile 2>&1

# if drive is ready begin reading; for tapes > 3MG432 the block size has changed
if [ "`samcmd s | grep /dev/rmt/${drive}cbn | grep "\---------r"`" == "" ]
then
   echo "Drive $drive is not ready. Something went wrong... aborting." >> $logfile 2>&1
   set_state on $drive
   exit
else
   if [ "$number" -gt "432" ]
   then
      (time star -b 1024 --exclude=ccdata/* --exclude=cacodata/* --exclude=drivelogs/* --exclude=*.root --exclude=*.pdf --exclude=*.gif --exclude=*.ps --exclude=*.txt -xvf /dev/rmt/${drive}cbn) >> $logfile 2>&1 ; set_state on $drive
   else
      (time star --exclude=ccdata/* --exclude=cacodata/* --exclude=drivelogs/* --exclude=*.root --exclude=*.pdf --exclude=*.gif --exclude=*.ps --exclude=*.txt -xvf /dev/rmt/${drive}cbn) >> $logfile 2>&1 ; set_state on $drive
   fi
   echo "Unloading tape $tape..." >> $logfile 2>&1
fi

echo -e "\nPerforming md5sum check. This will also take some hours." >> $logfile 2>&1
date >> $logfile 2>&1
${mars}/datacenter/scripts/checkmd5sum $tape
date >> $logfile 2>&1
md5=`cat /home/lapalma/tapecont/cont/muxdata/checksums/tape_${tape}L?.log | grep "Number of checked files matches. Files are ready."`

if [ "$md5" = "" ]
then
   echo "md5sum check failed! Please check what happened (see /home/lapalma/tapecont/cont/muxdata/checksums/tape_${tape}L*.md5.*). Exiting now." | tee -a $logfile 2>&1
   exit
else
   echo "files could be extracted without errors" >> $logfile 2>&1

   # if movingrawfiles is not running change the file attributes, but only for the current tape
   if ! [ -f /magic/datacenter/locks/lock-movingrawfiles*.txt ]
   then
      days=`grep "muxdata/...._.._.." /home/lapalma/tapecont/cont/muxdata/tape_${tape}L?.log | cut -d/ -f2 | sort -u`
      for day in ${days[@]}
      do
         chmod -R g+w  ${datatapepath}/muxdata/$day >> $logfile 2>&1
      	 chgrp -R auto ${datatapepath}/muxdata/$day >> $logfile 2>&1
   	 chown -R tape ${datatapepath}/muxdata/$day >> $logfile 2>&1
      done
   fi
fi

# move the raw files if neither movingrawfiles nor filesondisk is running
wait=1
if ! [ -f /magic/datacenter/locks/lock-movingrawfiles*.txt ] && ! [ -f /magic/datacenter/locks/lock-filesondisk.txt ]
then
   #echo "Moving raw files from $tapepath to /data. This may take some hours if moving from ${magictapepath}. Please stand by." >> $logfile 2>&1
   echo -e "\nMoving raw files from $datatapepath to /data. This may take some hours if moving from ${magictapepath}. Please stand by." >> $logfile 2>&1
   date >> $logfile 2>&1
   ssh -nx operator@dc07 'cd' $mars ' ; export AUTOMATIONSETUP=wue.magic.data ; '${mars}'/datacenter/scripts/movingrawfiles' >> $logfile 2>&1
   date >> $logfile 2>&1
   echo "Moving tape $tape to the export slots." >> $logfile 2>&1
   #determine slot again, the tape might have been moved manually to another slot
   tapeslot=`samcmd v 100 | grep "$tape " | cut -c-4 | sed -e 's/ //g'`
   samcmd export 100:$tapeslot
else
   while [ $wait -lt 10 ]
   do
      echo "movingrawfiles or filesondisk is running -> sleeping 60 s" >> $logfile 2>&1
      let wait++
      sleep 60
      if [ $wait == 10 ]
      then
         echo "Tried 10 times to launch movingrawfiles without avail. Finishing now." >> $logfile 2>&1
         echo "Moving tape $tape to the export slots." >> $logfile 2>&1
	 #determine slot again, the tape might have been moved manually to another slot
	 tapeslot=`samcmd v 100 | grep "$tape " | cut -c-4 | sed -e 's/ //g'`
   	 samcmd export 100:$tapeslot
         echo -e "\nTape $tape read but the files have NOT been moved. You will have to do it manually. The tape has been exported. Have a nice day." | tee -a $logfile 2>&1
         date >> $logfile 2>&1
         exit
      fi
   done
fi

echo -e "\nTape $tape read and files successfully moved. The tape has been exported. Have a nice day." | tee -a $logfile 2>&1
date >> $logfile 2>&1