#!/bin/bash
set -euo pipefail

dotdir="$HOME/dots"
# the trailing slashes are important here!
dothome="$dotdir/home/"
dotroot="$dotdir/root/"

usage() {
  echo "$0"
  echo
  echo "Usage: $0 [options] <file> <file...>

Options:
  -h, --help      Print this usage message.
Positional arguments:
  file            Path to be copied to dotfiles.

Details:
  A script to quickly copy specified files to dotfile directory.
"
}

dotcopy() {
  syspath="$(realpath "$1")"

  if [[ "$syspath" == "$HOME"* ]]; then
    dotpath="${syspath/#$HOME/$dothome}"
  else
    dotpath="$dotroot$syspath"
  fi

  # Ensure the destination directory exists
  mkdir -p "$(dirname "$dotpath")"

  cp -vi "$syspath" "$dotpath"
}

getopt=$(getopt \
  --longoptions=help \
  --options=h \
  -- "$@") || exit 1
eval set -- "${getopt}"

while [ $# -gt 0 ]; do
  case "$1" in
  -h | --help)
    usage
    exit 0
    ;;
  --)
    shift 1
    break
    ;;
  esac
done

if [ $# -eq 0 ]; then
  echo "No paths specified" >&2
  exit 1
fi

for arg in "$@"; do
  dotcopy "$arg"
done