#!/bin/sh -eu

if [ "${1:-}" ]; then
  _lang="$1"
fi

if [ "${2:-}" ]; then
  _year="$2"
else
  _year=$( date +%Y )
fi

### FUNCTION ##################################################################

rust() {
  rust_dir="$1"

  (
    printf '%s\n%s\n' '[workspace]' 'members = ['
    for day in $( seq 1 25 ); do
      printf '#     "day%02d",\n' "${day}"
    done
    echo ']'
  ) > "${rust_dir}/Cargo.toml"

  unset rust_dir
}

### MAIN ######################################################################

_dir="$( pwd )/${_year}"

if ! [ -d "${_dir}" ]; then
  read -p "Create directory '${_dir}'?: " _input

  case "${_input}" in
    'y' | 'Y')
      mkdir "${_dir}"
      ;;
    *)
      echo 'Okay, not doing anything then.'
      exit 0
      ;;
  esac
  unset _input
fi

[ "${_lang:-}" ] || read -p "Implementation language for '${_year}'?: " _lang

if ! [ -d "${_dir}/${_lang}" ]; then
  read -p "Create directory '${_dir}/${_lang}'?: " _input
  case "${_input}" in
    'y' | 'Y')
      mkdir "${_dir}/${_lang}"
      ;;
    *)
      echo 'Okay, not doing that then.'
      exit 0
      ;;
  esac
  unset _input
fi

read -p "Run '${_lang}(\"${_dir}/${_lang}\")'?: " _input
case "${_input}" in
  'y' | 'Y')
    ${_lang} "${_dir}/${_lang}"
    ;;
  *)
    echo 'Okay, not doing that then.'
    exit 0
    ;;
esac
unset _input

unset _dir _lang _year