#!/usr/bin/env sh
set -o errexit

export SUDO_PROMPT="sudo password: "

mount_dir="/mnt/fhnw-share"
pass_path="accounts/fhnw/students.fhnw.ch"

display_help() {
  echo "Usage: $0 [option...] " >&2
  echo
  echo "   -m,   ad mount directory [default: $mount_dir]"
  echo "   -p,   path for pass to get user and password information [default: $pass_path]"
  echo "   -h,   display this help and exit"
  echo
}

parse_args() {
  while getopts ":hm:p:" opt; do
    case $opt in
    h)
      display_help
      exit 0
      ;;
    m)
      mount_dir=$OPTARG
      ;;
    p)
      pass_path=$OPTARG
      ;;
    \?)
      echo "Invalid option: -$OPTARG" >&2
      display_help
      exit 1
      ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      display_help
      exit 1
      ;;
    esac
  done
}

get_account_info() {
  echo "getting account info from pass..."
  acc_info="$(pass "$pass_path")"
  acc_pw="$(echo "$acc_info" | head -n 1)"
  acc_user="$(echo "$acc_info" | awk -F ': ' '/^login-shortcut:/ {print $2}')"
}

mount_ad() {
  echo "mounting ad..."
  sudo mkdir -p "$mount_dir"
  sudo mount -t cifs //fs.edu.ds.fhnw.ch/data "$mount_dir" \
    -o vers=3.0,username="$acc_user",password="$acc_pw",workgroup=EDU,iocharset=utf8,uid="$USER",gid="$USER"
}

parse_args "$@"
get_account_info
mount_ad