#!/usr/bin/env bash

check_valid() {
  if [ -f "$1" ]; then
    echo "The file "$1" already exists!"
    exit 1
  fi
}

create_script() {
  touch "$1"
  chmod +x "$1"
  echo "$0: $2 script file $1 created with exec permissions"
  echo -e '#!/usr/bin/env '"$2" > "$1"
}

usage() {
  echo -e "Quickly create executable script\n"
  echo "Usage:"
  echo "  xtouch [ -w FILE LANG ]"
  echo -e "  xtouch ( -h | --help )\n"
  echo "Arguments:"
  echo "FILE  Name to give the scripts"
  echo -e "LANG  Language in which the script will be written\n"
  echo "Options:"
  echo "  -w FILE LANG      Creates a <LANG> executable script file named <FILE>."
  echo "  -h --help         Show this screen."
}

case "$1" in
  '-w')
    check_valid "$2"
    create_script "$2" "$3"
    ;;
  *)
    usage
    ;;
esac