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#!/bin/csh

# ---------------------------------------------------------------------

# Usage, parameter settings

# ---------------------------------------------------------------------

# Set Lagranto 

set LAGRANTO = ${LAGRANTOBASE}.${MODEL}/

# Write usage information

if ( (${#argv} == 0) | (${#argv} < 4) ) then

  echo 

  ${LAGRANTO}/bin/lagrantohelp caltra short 

  echo  

  exit 0

endif

# Write title

echo 

echo '========================================================='

echo '       *** START OF PREPROCESSOR CALTRA ***              '

echo

# Get the arguments

set startdate = $1

set enddate   = $2

set startf    = $3

set outfile   = $4

if ( ${#argv} > 4 ) then

   set flags = $5

else

   set flags=

endif 

# Set base directories (run+prog)

set cdfdir=${PWD}

set tradir=${PWD}

# Set program paths and filenames 

set parfile = ${tradir}/caltra.param 

# Set the prefix of the primary and secondary data files

set charp = 'P'

set chars = 'S'

echo '---- DIRECTORIES AND PROGRAMS ---------------------------'

echo    

echo "CDF directory         : ${cdfdir}"

echo "TRA directory         : ${tradir}"

echo "PROGRAM CALTRA        : ${LAGRANTO}/caltra/caltra"

echo "PARAMETER file        : ${parfile}"

echo

# ---------------------------------------------------------------------

# Set optional flags

# ---------------------------------------------------------------------

echo '---- OPTIONAL FLAGS -------------------------------------'

echo

# Set some default values ("nil" must be set according to input files)

set flag_j     = "nil"

set flag_i     = "nil"

set flag_t     = "nil"

set flag_o     = "nil"

set flag_p     = "nil"

set changet    = 'false'

set noclean    = 'false'

set timecheck  = 'no' 

set flag_f     = "nil"

set balloon    = 0

while ( $#argv > 0 )

  switch ( $argv[1] )

   case -j

     set flag_j=1

     echo "Flag '-j'     -> ${flag_j} (user defined)"

   breaksw

   case -i

     set flag_i=$argv[2]

     echo "Flag '-i'     -> ${flag_i} (user defined)"

     shift;

   breaksw

   case -t

     set flag_t=$argv[2]

     echo "Flag '-t'     -> ${flag_t} (user defined)"

     shift;

   breaksw

   case -o

     set flag_o=$argv[2]

     echo "Flag '-o'     -> ${flag_o} (user defined)"

     shift;

   breaksw

   case -p

     set flag_p=1

     echo "Flag '-p'     -> ${flag_p} (user defined)"

   breaksw

   case -changet

     set changet = 'true'

     echo "changet       -> true (user defined)"

   breaksw

   case -noclean

     set noclean = 'true'

     echo "noclean       -> true (user defined)"

   breaksw

   case -timecheck

     set timecheck = 'yes'

     echo "timecheck               -> yes (user defined)"

   breaksw

   case -fplane

     set flag_f=1

     echo "Flag '-fplane'     -> ${flag_f} (user defined)" 

     set lat_fixed=$argv[2]

     echo "Lat_fixed          -> ${lat_fixed} (user defined)" 

   breaksw

   case -balloon

     set balloon=$argv[2]

     echo "Flag '-balloon'     -> ${balloon} (user defined)" 

     shift

   breaksw

  endsw

  shift;

end

# No change of times necessary if no check requested

if ( "${timecheck}" == "no" ) then

   set  changet = 'false'

endif

# Set some defaults

if ( "${flag_j}"     == "nil" ) then

    set flag_j     = 0

    echo "Flag '-j'     -> 0 (default)"

endif

if ( "${flag_p}"     == "nil" ) then

    set flag_p     = 0

    echo "Flag '-p'     -> 0 (default)"

endif

if ( "${flag_f}"     == "nil" ) then

    set flag_f     = 0

    echo "Flag '-fplane'-> 0 (default)"

    set lat_fixed = -999.99

    echo "lat_fixed     -> 0 (default)"

endif

# ---------------------------------------------------------------------

# Handle the time specifier - startdate, enddate

# ---------------------------------------------------------------------

echo

echo '---- TIME RANGE -----------------------------------------'

echo

# Check format of start and end date - must be the same

set ns=`echo $startdate | sed -e 's/_[0-9]*//' | wc -c`

set ne=`echo $enddate   | sed -e 's/_[0-9]*//' | wc -c`

if ( $ns != $ne ) then

  echo " ERROR: start and end date must be in the same format ***"

  exit 1

endif

if ( $ns != 9 ) then

  echo " ERROR: Date format must be yyyymmdd ***"

  exit 1

endif

set ns=`echo $startdate | sed -e 's/[0-9]*_//' | wc -c`

set ne=`echo $enddate   | sed -e 's/[0-9]*_//' | wc -c`

if ( $ns != $ne ) then

  echo " ERROR: start and end date must be in the same format ***"

  exit 1

endif

if ( ( $ns != 5 ) & ( $ns != 3 ) ) then

  echo " ERROR: Time format must be hh(mm) ***"

  exit 1

endif

# Split the start and end date into <yymmdd_hh and mm>

set startdate_ymdh = `echo $startdate | cut -c 1-11`

set startdate_min  = `echo $startdate | cut -c 12-13`

if ( $startdate_min == "" ) set startdate_min = 00

set enddate_ymdh = `echo $enddate | cut -c 1-11`

set enddate_min  = `echo $enddate | cut -c 12-13`

if ( $enddate_min == "" ) set enddate_min = 00

# Get the time difference between <start_ymdh> and <end_ymdh> date

# Decide whether trajectoriesare forward or backward

set timediff_hh = `${LAGRANTO}/goodies/gettidiff ${enddate_ymdh} ${startdate_ymdh}`

if ( $timediff_hh == 0 ) then

  if ( $enddate_min > $startdate_min ) then

    set direction = f

    set idir      = 1

  else

    set direction = b

    set idir      = -1

  endif

else if ( $timediff_hh > 0 ) then

  set direction = f

  set idir      = 1

else

  set direction = b

  set idir      = -1

  @ timediff_hh = $idir * $timediff_hh

endif

# Get also minutes for time difference, if <start_min> or <end_min> != 0

set timediff_mm=00

if ( $startdate_min != 00 || $enddate_min != 00 ) then

  @ min = ( $enddate_min - $startdate_min )

  if ( $min == 0 ) then

    set timediff_mm=

  else if ( $min > 0 ) then

    if ( $idir == 1 ) then

      set timediff_mm=$min

    else

      @ timediff_hh --

      @ timediff_mm = 60 - $min

    endif

  else

    if ( $idir == 1 ) then

      @ timediff_hh --

      @ timediff_mm = 60 + $min

    else

      @ timediff_mm = 0 - $min

    endif

  endif

endif

# Set the reference date equal to the satrtdate

set refdate=${startdate}

# Write status information

echo "Time range      : ${startdate} -> ${enddate}"

if ( ${timediff_mm} !=  "" ) then

   echo "Time difference : ${timediff_hh} h ${timediff_mm} min"

else

   echo "Time difference : ${timediff_hh} h"

endif

echo "Direction       : ${direction} (${idir})"

echo "Reference date  : ${refdate}"

# ---------------------------------------------------------------------

# Check availability of input data 

# ---------------------------------------------------------------------

echo

echo '---- INPUT FILES ----------------------------------------'

echo

# Take the time increment from flag list ('nil', if not defined)

set timeinc = ${flag_i}

# Find a first data file (if possible corresponding to start/end date

# If starttime is not a data time, take the first file in the directory

if ( $direction == "f" ) then

  set file=${charp}${startdate_ymdh}

else 

  set file=${charp}${enddate_ymdh}

endif

if ( ! -f $file ) then

  set file=`ls ${charp}[0-9_]*[0-9] | head -1 | sed -e 's/@//'`

endif

# Determine timeinc (the time difference in hours between two data file)

# if not already defined with option -i

if ( ${timeinc} == "nil" ) then

  set date1=`echo $file | cut -c 2-`

  set n=`\ls ${charp}[0-9_]*[0-9] | grep -n $date1 | awk -F: '{print $1}'`

  @ n ++

  set date2=`\ls ${charp}[0-9_]*[0-9] | head -$n | tail -1 | cut -c 2-`

  set timeinc=`${LAGRANTO}/goodies/gettidiff $date2 $date1`

endif

if ( $timeinc == 0 ) then

    echo " ERROR: cannot set the time increment between input files ***"

    exit 1

endif

# Decide whether the time increment is smaller than 1 h; if so set the hires

# flag and convert the timeincement into fractional hour

set flag = `echo ${timeinc} | grep -n '\.'`

set hires = 0

if ( "${flag}" != "" ) then

  echo "Input files availability < 1 hour ($timeinc): switch to hires"

  echo "mode. All input files must be of form: P{yyyymmdd_hhmm}"

  set hires = 1

  set timeinc_min = `echo "(${timeinc} * 100 + 0.5)/1" | bc`

  set timeinc     = `echo "scale=2; ${timeinc} * 100 / 60" | bc`

  goto hires

endif

# Search the first file to use: We step through all P files and see whether they are

# good P files. Let's first do the test for the first data file found. If it's ok, we 

# take it; if not, we step through all P files and find the good one

set flag=0

set td=

set date = `echo ${file} | cut -c 2-12`

set td1  = `${LAGRANTO}/goodies/gettidiff ${startdate_ymdh} ${date}`

set td2  = `${LAGRANTO}/goodies/gettidiff ${enddate_ymdh}   ${date}`

if (( $td1 < $timeinc || $td2 < $timeinc ) && ( $td1 >= 0 || $td2 >= 0 )) then

   set datfiles=$date

   if ( $td1 < $timeinc    ) set td=$td1

   if ( $td2 < $timeinc    ) set td=$td2

   if ( ( $startdate_min > 0 ) || ( $enddate_min > 0 ) ) @ td ++

   goto label2      

endif

foreach i ( ${charp}????????_?? )

  set date = `echo $i | cut -c 2-12`

  set td1  = `${LAGRANTO}/goodies/gettidiff ${startdate_ymdh} ${date}`

  set td2  = `${LAGRANTO}/goodies/gettidiff ${enddate_ymdh}   ${date}`

  if (( $td1 < $timeinc || $td2 < $timeinc ) && ( $td1 >= 0 || $td2 >= 0 )) then

      set datfiles=$date

      if ( $td1 < $timeinc    ) set td=$td1

      if ( $td2 < $timeinc    ) set td=$td2

      if ( ( $startdate_min > 0 ) || ( $enddate_min > 0 ) ) @ td ++

      goto label2

  endif

end

if ( $td == "" ) then

  echo

  echo " ERROR: no data files available for the specified time period"

  exit 1

endif

# If the input files come with time increment < 1 hour, handle it in this

# special section. The aim is not to 'interfere' with the well established

# code handling the standard case with time increment >= 1 hour. In this mode

# we require that the start and end date are available as P files: no start is

# allowed between the model output files

hires:

set flag=0

set td=0

if ( $direction == "f" ) then

  set file=${charp}${startdate}

else 

  set file=${charp}${enddate}

endif

if ( -f $file ) then

  set date     = `echo ${file} | cut -c 2-14`

  set datfiles = $date

  set td       = 0

  goto label2

else

  echo

  echo " ERROR: no data files available for the specified time period"

  exit 1

endif

# Everything is fine so far (first data file found): proceed

label2:

# Calculate the number of further files; handle hires (timeinc<1 h) and

# standard mode (timeinc >= 1 h) separately

if ( ${hires} == 0 ) then

 @ num = ( $timediff_hh + $td ) / $timeinc + 1

 @ dum1 = ( $num - 1 ) * $timeinc

 @ dum2 = $timediff_hh + $td

 if ( $dum1 != $dum2 ) @ num ++

else

 set num = `echo "( ${timediff_hh}*60 + ${timediff_mm} ) / ( ${timeinc_min} ) + 1" | bc`

endif 

# Get a list of all needed files

set numfiles=$num

set sfiles=1

echo $datfiles

while ( $num > 1 )

  if ( $hires == 0 ) then

     set date=`${LAGRANTO}/goodies/newtime $date $timeinc`

  else

     set date=`${LAGRANTO}/goodies/newtime $date $timeinc_min`

  endif

  if ( ! -f ${charp}${date} ) then

    echo " ERROR: file with primary data is missing for $date"

    exit 1

  else if ( ! -f ${chars}${date} ) then

    set sfiles=0

    set datfiles=`echo $datfiles $date`

  else

    set datfiles=`echo $datfiles $date`

  endif

  @ num --

end

# Write some status information

echo "Primary file prefix            : ${charp}"

echo "Secondary file prefix          : ${chars}"

if ( ${hires} == 0 ) then

  echo "Time increment for input files : ${timeinc} h"

else

  echo "Time increment for input files : ${timeinc_min} min (0$timeinc h) "

endif

echo "# input files                  : ${numfiles}"

echo "${charp} files availability           : 1"  

echo "${chars} files availability           : ${sfiles}"     

echo "First input file               : $datfiles[1] " 

echo "Last input file                : $datfiles[$numfiles] " 

echo

echo $datfiles

# ---------------------------------------------------------------------

# Handle vertical wind - scaling factor

# ---------------------------------------------------------------------

echo

echo '---- VERTICAL WIND SCALING ------------------------------'

echo

# Check whether W is avialbale on first file

set first=$datfiles[1]

set file="${charp}${first}"

set omflag = 0

foreach var ( `${LAGRANTO}/goodies/getvars $file` )

   if ( "${var}" == "W" ) set omflag = 1

end

if ( $omflag != 1 ) then

   echo " ERROR: variable W is not on file $file"

   exit 1

endif

# Set the scale factor for vertical wind

set wfactor=1.

# Write status information

echo "Vertical scaling factor (wfactor)  : ${wfactor}"

# ---------------------------------------------------------------------

# Time step and output interval

# ---------------------------------------------------------------------

echo

echo '---- TIME STEPS -----------------------------------------'

echo

# Take the time step and output step from flag list ('nil', if not defined)

set timestep = ${flag_t}

set deltout  = ${flag_o}

# Calculate the time step

if ( $hires == 0 ) then

  if ( $timestep == "nil" ) @ timestep = ( 60 * $timeinc ) / 12

else

  if ( $timestep == "nil" ) set timestep =  `echo "scale=2; $timeinc_min / 12" | bc`

endif

# Take the output interval from time increment

if ( $hires == 0 ) then

  if ( $deltout == "nil" ) @ deltout = 60 * ${timeinc}

else

  if ( $deltout == "nil" ) set deltout = ${timeinc_min}

endif

# Check whether the timestep is an integer ratio of deltout

#@ flag = $deltout / $timestep

#@ flag = $deltout - ( $flag * $timestep )

set flag = `echo "scale=2; $deltout / $timestep" | bc`

set flag = `echo "scale=2; $deltout - ( $flag * $timestep )" | bc`   

if ( $flag != 0 ) then

  echo " ERROR: output time interval should be multiple of timestep"

  echo 

  echo "           $deltout min  : output time interval"

  echo "           $timestep min  : time step"

  exit 1

endif

# Calculate the start and the end time relative to the first datfile

if ( $direction == f ) then

  set tstart = `${LAGRANTO}/goodies/gettidiff $startdate $datfiles[1]`

  set tend   = `${LAGRANTO}/goodies/gettidiff $datfiles[$numfiles] $enddate`

else

  set tstart = `${LAGRANTO}/goodies/gettidiff $datfiles[$numfiles] $startdate`

  set tend   = `${LAGRANTO}/goodies/gettidiff $enddate $datfiles[1]`

endif

# Check whether tstart and tend are a multiple of the output time interval

if ( $tstart != 0 ) then

  if ( `echo $tstart | grep "\."` != "" ) then

    set dum=`echo $tstart | sed -e 's/[-0-9]*\.//'`

    @ flag = $dum / $deltout

    @ flag = $dum - ( $flag * $deltout )

    if ( $flag != 0 ) then

      echo " ERROR : the start time should be shifted relative to the first"

      echo "         datafile by a multiple of the output time interval"

      echo "         hint:  set the latter with the option -o"

      exit 1

    endif

  endif

endif

if ( `echo $tend | grep "\."` != "" ) then

  set dum=`echo $tend | sed -e 's/[-0-9]*\.//'`

  @ flag = $dum / $deltout

  @ flag = $dum - ( $flag * $deltout )

  if ( $flag != 0 ) then

    echo " ERROR : the end time should be shifted relative to the first"

    echo "         datafile by a multiple of the output time interval"

    echo "         hint:  set the latter with the option -o"

    exit 1

  endif

endif

# Write status information

echo "Trajectory calculation time step [min] : ${timestep}"

echo "Output time step [min]                 : ${deltout}"

if ( $direction == f ) then

  echo "Start time relative to first file      : $datfiles[1] + ${tstart} "

  echo "End time relative to first file        : $datfiles[$numfiles] - ${tend} "  

else

  echo "Start time relative to first file      : $datfiles[$numfiles] - ${tstart} "

  echo "End time relative to last file         : $datfiles[1] + ${tend} "

endif

# ---------------------------------------------------------------------

# Start file

# ---------------------------------------------------------------------

echo

echo '---- START FILE -----------------------------------------'

echo

# Check if start file is available

if ( ! -f ${startf} ) then

   echo " ERROR : start file ${startf} is missing"

   exit 1

endif

# Decide whether startfile has an explicit format specifier

set format = "0"

foreach app ( 1 2 3 4 5 6 7 8 9 )

  set flag = `echo ${startf} | grep "\.${app}"`

  if ( "${flag}" != "" ) set format = "${app}"

end

# If format is 0, it might nevertheless be a hidden format 1

if ( "${format}" == "0" ) then

    set ncol = `awk "{print NF}" ${startf} | head -1` 

    if ( "${ncol}" != "3" ) then 

       set format = "1"

       echo " WARNING: ${startf} is a hidden trajectory file of format 1"

       echo "          it will be renamed: ${startf} -> ${startf}.1"

       echo

       ln -sf ${startf} ${startf}.1

       set startf = "${startf}.1"

    endif

endif

# Get the number of trajectories

if ( "${format}" == "0" ) then

   set ntra = `wc -l ${startf} | awk '{print $1}' `

   set ncol = 3

else

   set ntra = `${LAGRANTO}/goodies/trainfo.sh ${startf} ntra`

   set ncol = `${LAGRANTO}/goodies/trainfo.sh ${startf} ncol`

   set ntim = `${LAGRANTO}/goodies/trainfo.sh ${startf} ntim`

   if ( "${ntim}" != "1" ) then

      echo " ERROR: starting trajectory file must only have one time... Stop"

      exit 1

   endif

endif

# Write status information

echo "Start file                  : ${startf} "

if ( "${format}" == "0" ) then 

   echo "Format                      : (lon,lat,p) list"

else

   echo "Format                      : trajectory file (${format})"

endif

echo "# coordinates (lon,lat,lev) : ${ntra} "  

echo "# columns                   : ${ncol} "  

# ---------------------------------------------------------------------

# Prepare input file for caltra and run it

# ---------------------------------------------------------------------

# Set times relative to the reference date

if ( "${changet}" == "true" ) then

 echo

 echo '---- CHANGE TIMES ON DATA FILES  ------------------------'

 echo   

 foreach i ( $datfiles )

   ${LAGRANTO}/goodies/changet.sh ${refdate} ${charp}${i}

 end

 if ( ${sfiles} == 1 ) then

   foreach i ( $datfiles )

     ${LAGRANTO}/goodies/changet.sh ${refdate} ${chars}${i}

   end

 endif

endif

# Split the reference date

set yyyy=`echo ${refdate}   | cut -c 1-4` 

set   mm=`echo ${refdate}   | cut -c 5-6` 

set   dd=`echo ${refdate}   | cut -c 7-8` 

set   hh=`echo ${refdate}   | cut -c 10-11` 

set  min=`echo ${refdate}00 | cut -c 12-13` 

# Get the total time range

if ( ${timediff_mm} != '' ) then

   @ timerange = 60 * ${timediff_hh} + ${timediff_mm}

else

   @ timerange = 60 * ${timediff_hh}

endif

# Write parameter file

\rm -f ${parfile}

touch ${parfile}

\echo $idir                   >> $parfile

echo $numfiles                >> $parfile

foreach i ( $datfiles )

  echo $i                     >> $parfile

end

echo $timeinc                 >> $parfile

echo $flag_p                  >> $parfile

echo \"${startf}\"            >> $parfile

echo ${ntra}                  >> $parfile

echo ${ncol}                  >> $parfile

echo \"${outfile}\"           >> $parfile

echo $timestep                >> $parfile

echo $tstart                  >> $parfile

echo $tend                    >> $parfile

echo $deltout                 >> $parfile

echo $flag_j                  >> $parfile

echo $wfactor                 >> $parfile

echo $yyyy                    >> $parfile

echo $mm                      >> $parfile

echo $dd                      >> $parfile

echo $hh                      >> $parfile

echo $min                     >> $parfile

echo $timerange               >> $parfile

echo \"${timecheck}\"         >> $parfile

echo ${flag_f}                >> $parfile

echo ${lat_fixed}             >> $parfile

echo ${balloon}               >> $parfile

# Finish the preprocessor

echo 

echo '       *** END OF PREPROCESSOR CALTRA ***              '

echo '========================================================='

echo

# Run caltra

${LAGRANTO}/caltra/caltra

if ( "${status}" != "0" ) then

  echo "ERROR:  Program <caltra> failed"

  exit 1

endif

# ----------------------------------------------------------

# Final tasks (make clean)

# ----------------------------------------------------------

finish:

if ( "${noclean}" == "false" ) then

  \rm -f ${parfile}

 endif

exit 0