#!/bin/bash

# set input/working/output folders
in=/Users/daniela/Desktop/scenario_001/files5s
work=/Users/daniela/Desktop/scenario_001/tmpab
out=/Users/daniela/Desktop/scenario_001/outab

# launching mirrors
mirror=( "USM" "LSM" )
r0=( 699.871 705.392 )
z0=( 441.441 417.821 )

# steering range
amin=20
amax=70
bmin=16
bmax=26

# check if working folder exists, otherwise create it
if [[ ! -e $work ]]; then
  mkdir $work
else
  if [[ ! -d $work ]]; then
    echo $work is not a folder.
    exit 1
  fi
fi
# move to working folder
cd $work
if [[ $? != 0 ]]; then
  echo Cannot move to $work
  exit 1
fi

# check if output folder exists, otherwise create it
if [[ ! -e $out ]]; then
  mkdir $out
else
  if [[ ! -d $out ]]; then
    echo $out is not a folder.
    exit 1
  fi
fi

eqfile=$in/F4E_Equil_10520.eqdsk
# look for time value in equil file
base=`basename $eqfile .eqdsk`
tstr=`echo $base | grep "[[:digit:]]\{5\}" -o`
t=`echo "$tstr-10000" | bc`
# copy input files in working folder
cp $eqfile ${base}.eqdsk
cp $in/${base}.prf ${base}.prf

#loop on USM/LSM mirrors
for i in 0 1; do
  # set output file names
  id="${mirror[i]}_t$t"
  f7file=$out/f7_${id}.txt
  rm -f $out/log_${id}.txt
  # add header in output file
  echo "# =============================" > $f7file
  echo "# `date`" >> $f7file
  echo "# ${mirror[i]}: R0=${r0[i]} z0=${z0[i]}" >> $f7file
  echo "# time=$t" >> $f7file
  echo "# =============================" >> $f7file
  appendheader=0
  #loop on beta
  for (( beta=$bmin; beta<=$bmax ; beta=beta+2 )); do
    #loop on alpha
    for (( alpha=$amin; alpha<=$amax ; alpha=alpha+2 )); do
      # replace dummy values in template for gray.data
      sed "s/-alfa-/$alpha/g; \
           s/-beta-/$beta/g; \
           s/-x0-/${r0[i]}/g; \
           s/-z0-/${z0[i]}/g; \
           s/-equil-/$base/g; \
           s/-prf-/$base/g" $in/gray0.data > gray.data
      # run gray
      gray >> $out/log_${id}.txt
      if (( $appendheader==0 )); then
        # append parameters to header if first run of the loop
        cat headers.txt >> $f7file
        echo "#beta alpha`head -n 1 fort.7 | sed 's/#//'`" >> $f7file
        appendheader=1
      fi
      # add time and alpha values in first two columns
      awk 'NR>1 {print '$beta','$alpha',$0}' fort.7 >> $f7file
    done
    #end of alpha loop
    echo " " >> $f7file
  done
  #end of beta loop
done
#end of mirrors loop

# remove files from working folder
rm ${base}.eqdsk ${base}.prf fort.*

#EOF