#!/bin/bash
#--------------------------------------------------------------------------------#
# This file is part of the PALM model system.
#
# PALM is free software: you can redistribute it and/or modify it under the terms
# of the GNU General Public License as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later version.
#
# PALM is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# PALM. If not, see <http://www.gnu.org/licenses/>.
#
# Copyright 1997-2018  Leibniz Universitaet Hannover
#--------------------------------------------------------------------------------#
#
# Current revisions:
# -----------------
# 
# 
# Former revisions:
# -----------------
# $Id: palmplot 3202 2018-08-22 06:54:52Z resler $
# Unix-Shell has been changed to bash 
# 
# 2885 2018-03-14 11:02:46Z Giersch
# assign configuration file within palmplot call
# 
# 2837 2018-02-26 14:04:53Z gronemeier
# Corrected "Former revisions" section
#
# 2696 2017-12-14 17:12:51Z kanani
# Change in file header (GPL part)
#
# 1310 2014-03-14 08:01:56Z raasch
# update GPL copyright
#
# 1046 2012-11-09 14:38:45Z maronga
# code put under GPL (PALM 3.9)
#
# palmplot - script for running the NCL scripts
    # Using the available NCL scripts via the shell script palmplot

    # Last changes
    # 16/03/10 - Rieke - initial revision
    # 30/03/10 - Rieke - substituting double quotes (") with a character 
    #                    variable (dq) containing double quotes 
    # 31/03/10 - Rieke - list of variable names can be specified using 
    #                    blank separated lists instead of comma 
    #                    separated lists
    # 01/04/10 - Rieke - bugfix - treatment of special character *
    #                    in NCL variables containing lists corrected
    # 23/08/10 - Rieke - bugfix - "" had to be added in if-queries 
    # 30/09/10 - Rieke - Link to new online documentation of PALM NCL scripts
    # 31/10/11 - Rieke - Adjustement so that palmplot also works on 
    #                    DKRZ (ibmh)


 # SHORT INTRODUCTION FOR USING THIS SCRIPT
 if [[ "$1" = "?"  || "$1" = "--help" || "$1" = "-h" ]]
  then
    (printf "\n   palmplot is designed to run the NCL scripts of PALM \n"
     printf "\n   palmplot can be called as follows:"
     printf "\n   palmplot script_identifier file_1=OUTPUT/test.nc file_out=test format_out=pdf var='pt w\"pt\" w*pt* u' no_rows=2 ...\n"
     printf "\n   script_identifier has to be one of the following:"
     printf "\n    xy, xz, yz, pr, ts, sp"
     printf "\n   in dependence on the data that wants to be plotted\n"
     printf "\n   the further arguments control the plot"
     printf "\n   they can also be set in the configuration file .ncl.config"
     printf "\n   a documentation is available at"
     printf "\n   http://palm.muk.uni-hannover.de/wiki/doc/app/ncl \n\n")
     exit
 fi


 # DEFINITION OF VARIABLES
 a=""
 arg=""
 b=""
 key=""
 script=""
 value=""
 CMDLINE=""
 STRINGPARAMS=""
 STRINGPARAMS_CO=""
 STRINGPARAMS_CS=""
 STRINGPARAMS_PR="" 
 STRINGPARAMS_SP=""
 STRINGPARAMS_TS=""
 STRINGPARAMS_VA=""


 # LIST OF THE PARAMETERS OF THE NCL SCRIPTS WHICH NCL EXPECTED TO BE STRINGS
 # CO: PARAMETERS WHICH ARE COMMON FOR ALL NCL SCRIPTS
 # CS: cross_sections.ncl PR: profiles.ncl SP: spectra.ncl TS: timeseries.ncl
 # VA: PARAMETERS WHICH CONTAIN LISTS OF VARIABLE NAMES
 STRINGPARAMS_CO="file_1 format_out file_out var file_config "
 STRINGPARAMS_CS="sort mode fill_mode unit_x unit_y unit_z vec1 vec2 plotvec"
 STRINGPARAMS_PR="file_2 file_3 file_4 file_5 file_6 name_legend_1 name_legend_2 name_legend_3 name_legend_4 name_legend_5 name_legend_6 c_var"
 STRINGPARAMS_SP="sort unit_x unit_y"
 STRINGPARAMS_TS="unit_t"
 STRINGPARAMS_VA="var c_var vec1 vec2 plotvec"


 # CHOICE OF THE PARTICULAR NCL SCRIPT
 if [[ "$1" == "xy" ]]
  then 
    script="cross_sections.ncl"
    STRINGPARAMS=$STRINGPARAMS_CO$STRINGPARAMS_CS
    CMDLINE="xyc=1 "
  elif [[ "$1" == "xz" ]]
    then 
    script="cross_sections.ncl"
    STRINGPARAMS=$STRINGPARAMS_CO$STRINGPARAMS_CS
    CMDLINE="xzc=1 "
  elif [[ "$1" == "yz" ]]
    then 
    script="cross_sections.ncl"
    STRINGPARAMS=$STRINGPARAMS_CO$STRINGPARAMS_CS
    CMDLINE="yzc=1 "
  elif [[ "$1" == "pr" ]]
    then 
    script="profiles.ncl"
    STRINGPARAMS=$STRINGPARAMS_CO$STRINGPARAMS_PR
  elif [[ "$1" == "ts" ]]
    then 
    script="timeseries.ncl"
    STRINGPARAMS=$STRINGPARAMS_CO$STRINGPARAMS_TS
  elif [[ "$1" == "sp" ]]
    then 
    script="spectra.ncl"
    STRINGPARAMS=$STRINGPARAMS_CO$STRINGPARAMS_SP
   else
     (printf "\n  first argument has to be one of the following:"
      printf "\n   xy, xz, yz, pr, ts or sp \n" 
      printf "\n  type \"palmplot ?\" for information about the usage of this script\n")
     exit
 fi

 # SHIFTING THE FIRST COMMAND LINE ARGUMENT
 shift 

 # PROCESSING THE COMMAND LINE ARGUMENTS
 while [ $# -gt 0 ] 
 do
    arg=$1
    key=${arg%%=*}
    value=${arg#*=}

    # ALLOWING RELATIVE AND ABSOLUTE FILE PATHS 
    if [[ "$key" ==  @(file_*) && "$value" != @(~/*|/*) ]]
    then
       value=$PWD/$value
    fi

    # USE CONFIG FILE SPECIFIED BY USER
    if [ "$key" = "file_config" ]
    then
       if [ -f $value ]
       then
          use_user_config=true
       else
          printf "\n  configuration file \"$value\" not found."
          printf "\n  trying to use one of the standard configuraion files...\n"
       fi
    fi

    # PROCESSING STRINGS
    for a in $STRINGPARAMS
    do
      if [ "$key" = "$a" ]
      then

         # PROCESSING STRINGS CONTAINING LISTS OF VARIABLES
         for b in $STRINGPARAMS_VA
         do
           if [ "$key" = "$b" ]
           then
              if [[ "$value" != "all" ]]
              then
                 # SUBSTITUTING BLANKS WITH COMMAS IN 
                 # PARAMETERS CONTAINING LISTS OF VARIABLES
                 value=`echo $value | sed 's/ /,/g'`   
                 # ALLOWING THE USAGE OF COMMA SEPARATED LIST AS WELL    
            
                 if [[ "$value" == "${value#,}" ]]
                 then
                    value=,$value
                 fi
                 if [[ "$value" == "${value%,}" ]]
                 then
                    value=$value,
                 fi          
                 value=${value/%\*,,/\*,}                 
                 break
              fi
           fi
         done

         # SUBSTITUTING DOUBLE QUOTES - REQUIRED BY NCL
         value=`echo $value | sed 's/\"/\"+dq+\"/g'`
         # SETTING ENTIRE STRING IN DOUBLE QUOTES - REQUIRED BY NCL
         value=\"$value\"
      fi
    done

    CMDLINE=$CMDLINE"$key=$value "
    shift
 done

 # SET CONFIGURATION FILE TO ONE OF THE DEFAULT FILES IF NOT SPECIFIED BY USER
 if [ "$use_user_config" != true ]
 then
    key="file_config"

    if [ -f $PALM_BIN/../../.ncl.config ]
    then
       value="\"$PALM_BIN/../../.ncl.config\""
    else
       value="\"$PALM_BIN/NCL/.ncl.config.default\""
    fi

    CMDLINE=$CMDLINE"$key=$value "
 fi

 # EXECUTING THE PARTICULAR NCL SCRIPT
 cd $PALM_BIN/NCL
 ncl 'dq=str_get_dq()' $script $CMDLINE