#!/bin/bash

#NICE="blacktext linewidth 4.0 \"Helvetica\" 16 "

# try thinner lines
NICE="color blacktext solid linewidth 1.0 \"Helvetica\" 20 size 16cm,7cm"

EXT="png"
TERMINAL="png size 1024,768 large"

GRAPH=points
XTRA=
while true; do
  case $1 in
      --eps)
	  shift
	  EXT="eps"
	  TERMINAL="postscript eps $NICE"
	  ;;
      --lines)
	  shift
	  GRAPH=lines
	  ;;
      --xrange)
	  shift
	  XRANGE="set xrange [$1:$2]"
	  shift
	  shift
	  ;;
      --xticks)
	  shift
	  XTICKS="set xtics $1, $2"
	  shift
	  shift
	  ;;
      --yrange)
	  shift
	  YRANGE="set yrange [$1:$2]"
	  shift
	  shift
	  ;;
      --yticks)
	  shift
	  YTICKS="set ytics $1, $2"
	  shift
	  shift
	  ;;
      --extra)
	  shift
	  XTRA="$1"
	  ;;
      --linespoints)
	  shift
	  GRAPH=linespoints
	  ;;
      --*)
	  echo "unrecognized option: $1"
	  exit 1
	  ;;
    *)
	  break
	  ;;
  esac
done


OUT=$1
XLABEL=$2
YLABEL=$3
TITLE=$4
shift 4

PLOT="plot "


while [ ! -z "$1" ] && [ ! -z "$2" ] && [ ! -z "$3" ] && [ ! -z "$4" ]; do
    CSV=$1
    COL1=$2
    COL2=$3
    NAME=$4
    PLOT="$PLOT '${CSV}' using ${COL1}:${COL2} title '${NAME}' with $GRAPH"
    shift 4
    if [ ! -z "$1" ]; then
	PLOT="$PLOT, "
    fi
    # fixup csv file, gnuplot is picky
    sed -i -e 's/,\([^ ]\)/, \1/g' "$CSV"
done

#echo $OUT
#echo $XLABEL
#echo $YLABEL
#echo $TITLE
#echo $PLOT

if [ "$PLOT" = "plot " ]; then
    echo "Usage: $0 [--eps] <outfile> <X label> <Y label> <title> "\
	"(<csv file> <column1> <column2> <label>)+"
    exit 1
fi

OUT="${OUT}.${EXT}"
KEY="set key below"
KEY="set key off"
gnuplot <<EOM
set terminal $TERMINAL
set out '/dev/null'
$YRANGE
$YTICKS
$XRANGE
$XTICKS
$PLOT
set ylabel  '$YLABEL'
set xlabel  '$XLABEL'
set title '$TITLE'
$KEY
set data style $GRAPH
set out '$OUT'
replot
set out
EOM

if [ "$EXT" == "eps" ]; then
    ps2pdf -dEPSCrop $OUT
fi