#!/bin/bash

while getopts "clr" opt; do
  case $opt in
    c) exclude_comments=true;;
    l) show_length=true;;
    r) show_recap=true;;
    *) echo "Usage: $0 [-c] [-l] [-r] [file1] [file2] ..." >&2
       exit 1;;
  esac
done

shift $((OPTIND-1))

if [[ $# -eq 0 ]]; then
  set -- *
fi

line_count=0
char_count=0

for file in "$@"; do
  if [[ ! -e $file ]]; then
    echo "$0: $file: No such file or directory" >&2
    continue
  fi
  
  line_num=0
  while read -r line; do
    line_num=$((line_num+1))
    if [[ $exclude_comments && $line == \#* ]]; then
      continue
    fi
    if [[ $show_length ]]; then
      echo "$line_num ($(( ${#line} ))): $line"
    else
      echo "$line_num: $line"
    fi
    char_count=$((char_count+${#line}))
  done < "$file"
  
  line_count=$((line_count+line_num))
done

if [[ $show_recap ]]; then
  echo "Total: $line_count lines, $char_count characters"
fi

if [[ $line_count -eq 0 ]]; then
  exit 1
fi