#!/usr/bin/sh -e
# Fortune implementation in awk

usage()
{
    echo "fortune -- a simple awk/POSIX sh implementation of fortune"
    echo ""
    echo "\t-h, --help                   show this help message"
    echo "\t-l, --list=\$FILE            list installed cookie files"
    echo "\t-f=\$FILE, --file=\$FILE     specify path to cookie file"
    echo "\t-c=\$FILE, --cookie=\$FILE   specify cookie file"
}

FILE="$(find /usr/share/fortune/ -type f -not -name '*.dat')"
while [ "$1" != "" ]; do
  PARAM=`echo $1 | awk -F= '{print $1}'`
  VALUE=`echo $1 | awk -F= '{print $2}'`
  case $PARAM in
      -h | --help)
          usage
          exit
          ;;
      -f | --file)
          FILE=$VALUE
          ;;
      -c | --cookie)
          FILE=/usr/share/fortune/$VALUE
          ;;
      -l | --list)
        ls -1 /usr/share/fortune
        exit
        ;;
      *)
          echo "ERROR: unknown parameter \"$PARAM\""
          usage
          exit 1
          ;;
  esac
  shift
done

awk '$1 == "%" {
  sub(/%/, "")
  ++f
}

{
  fortunes[f] = fortunes[f] (length(fortunes[f])?"\n":"") $0
}

END {
  "date +%N" | getline time
  srand(time)
  print fortunes[int(rand() * f) + 1]
}' $FILE