#!/bin/ksh
if [ ! -f $HOME/HotShell/.hotprinters ]
then
  echo "$HOME/HotShell/.hotprinters file unavailable"
  echo "Please check or reinstall your HotShell distribution"
  echo "To make your own .hotprinters file, use this format:"
  echo "# Comments"
  echo "nhp15"
  echo "nhp7"
  echo " "
  echo " until you have listed all printers, one on each line"
  exit 1
fi
# Otherwise, .hotprinters exists and we didn't exit
printers=$HOME/HotShell/.hotprinters
if [ $# -lt 2 -o $# -gt 3 ]
then
  echo "hprint: Incorrect usage"
  echo "Usage: hprint [-a printer]|[-d printer]|[printer job [time (in seconds)]]"
  exit 1
elif [ $# -eq 3 ]
then
  if [ ! $3 -gt -1 ]
  then
    echo "hprint: time must be a non-negative number"
    exit 1
  else
    if [ -f $2 ]
    then
      grep $1 $HOME/HotShell/.hotprinters > /dev/null
      if [ $? -eq 0 ]
      then
        lpq -P$1 | grep "no entries" >/dev/null
        if [ $? -eq 0 ]
        then
          echo "$1 is empty, so printing there."
          lpr -P$1 $2
          exit 0
        else
          echo "Printing $2 to printer: $1"
          lpr -P$1 $2
	  sleep $3
	  lpq -P$1 | grep "no entries" >/dev/null
	  if [ $? -eq 0 ]
	  then
	    echo "Job $2 is already completed at $1"
	    exit 0
	  else
	    lpq -P$1 | grep $2 |
	    grep "active" >/dev/null
	    if [ $? -eq 0 ]
	    then
	      echo "Job $2 is currently printing on $1"
	      exit 0
	    else
	      echo "Job $2 has not printed after $3 seconds at $1."
	      jobid=`lpq -P$1 | grep $2 | awk '{ print $3}'`
              echo "First removing $2 from $1 . . . "
	      lprm -P$1 $jobid
	      echo "Trying a new Printer"
              cleaned=`sed '{
	      #strip out comments
	        /#/d
              }' $printers |
              awk '{
	        print $1
              }'`
              y=9999
              for name in $cleaned
              do
	        echo "Searching printer $name . . ."
	        x=`lpq -P$name |
	        awk 'END{ print NR }'`
	        if [ $x -lt $y ]
	        then
		  y=$x
		  keeper=$name
	        fi
              done
              echo "$keeper had smallest printer queue"
              echo "Now printing $2 to $keeper"
              lpr -P$keeper $2
	      exit 0
	    fi
	  fi
        fi      
      else
        echo "Printer not in $printers file"
	echo "to use this printer, type hprint -a printer"
	echo "and try again"
	exit 1
      fi
    else
      echo "$2 is not a file"
      exit 1
    fi
  fi
elif [ $# -eq 2 ]
then
  if [ $1 = "-a" ]
  then
    if [ $2 ]
    then
      grep $2 $printers > /dev/null
      if [ $? -ne 0 ]
      then
        echo "Adding printer $2 to your $printers file"
        echo $2 >> $printers
        exit 0
      else
        echo "$2 already in $printers.  Not adding"
        exit 1
      fi
    else
      echo "No printer given to add"
      exit 1
    fi
  elif [ $1 = "-d" ]
  then
    if [ $2 ]
    then
      grep $2 $printers > /dev/null
      if [ $? -eq 0 ]
      then
        echo "Removing $2 from $printers"
        egrep -v $2 $printers > .htmp.will.delete
        rm $printers
        mv .htmp.will.delete $printers
        exit 0
      else
        echo "$2 not in $printers.  Cannot delete"
        exit 1
      fi
    else
      echo "No printer given to delete" 
      exit 1
    fi
  fi
  if [ -f $2 ]
  then
    grep $1 $HOME/HotShell/.hotprinters > /dev/null
    if [ $? -eq 0 ]
    then
      echo "Printing $2 to printer: $1"
      lpr -P$1 $2
      exit 0
    else
      echo "Printer not in $printers file"
      echo "to use this printer, type hprint -a printer"
      echo "and try again"
      exit 1
    fi
  else
    echo "$2 is not a valid file"
    echo "Make sure you are in the correct directory"
    exit 1
  fi
fi