#!@SHELL@

: ${RCM_LIB:=$(dirname "$0")/../share/rcm}
. "$RCM_LIB/rcm.sh"

remove_link() {
  local dest="$1"
  local original="$2"
  local sigil="$3"

  $DEBUG "remove_link $1 $2 $3"

  if [ "x$dest" = "x/" -o "x$dest" = "x$DEST_DIR" ]; then
    $VERBOSE "not a symlink, skipping: $original"
  elif [ -L "$dest" -o "x$sigil" = "xX" ]; then
    rm_v -rf "$dest"
    rmdir -p "$(dirname "$original")" 2>/dev/null
  else
    remove_link "$(dirname "$dest")" "$original"
  fi
}

show_help() {
  local exit_code=${1:-0}

  $PRINT "Usage: rcdn [-hqVv] [-B HOSTNAME] [-d DOT_DIR] [-I EXCL_PAT] [-S EXCL_PAT] [-s EXCL_PAT] [-t TAG] [-U EXCL_PAT] [-u EXCL_PAT] [-x EXCL_PAT]"
  $PRINT "see rcdn(1) and rcm(7) for more details"

  exit $exit_code
}

handle_command_line() {
  local arg_tags=
  local verbosity=0
  local version=0
  local run_hooks=1
  local dotfiles_dirs=
  local files=
  local excludes=
  local includes=
  local symlink_dirs=
  local never_symlink_dirs=
  local undotted=
  local never_undotted=
  local hostname=

  while getopts :VqvhIKk:x:S:s:U:u:t:d:B: opt; do
    case "$opt" in
      h) show_help ;;
      B) hostname="$OPTARG" ;;
      I) includes="$(append_variable "$includes" "$OPTARG")" ;;
      k) run_hooks=1 ;;
      K) run_hooks=0 ;;
      t) arg_tags="$(append_variable "$arg_tags" "$OPTARG")" ;;
      S) symlink_dirs="$(append_variable "$symlink_dirs" "$OPTARG")" ;;
      s) never_symlink_dirs="$(append_variable "$never_symlink_dirs" "$OPTARG")" ;;
      U) undotted="$(append_variable "$undotted" "$OPTARG")" ;;
      u) never_undotted="$(append_variable "$never_undotted" "$OPTARG")";;
      v) verbosity=$(($verbosity + 1));;
      q) verbosity=$(($verbosity - 1));;
      d) dotfiles_dirs="$(append_variable "$dotfiles_dirs" "$OPTARG")" ;;
      V) version=1 ;;
      x) excludes="$(append_variable "$excludes" "$OPTARG")" ;;
      ?) show_help 64 ;;
    esac
  done
  shift $(($OPTIND-1))

  handle_common_flags rcup $version $verbosity
  hostname="$(determine_hostname "$hostname")"

  tags="${arg_tags:-$TAGS}"
  dotfiles_dirs="${dotfiles_dirs:-$DOTFILES_DIRS}"
  files="$@"
  RUN_HOOKS="$run_hooks"

  for tag in "$tags"; do
    LS_ARGS="$LS_ARGS -t \"$tag\""
  done
  for dotfiles_dir in "$dotfiles_dirs"; do
    LS_ARGS="$LS_ARGS -d \"$dotfiles_dir\""
  done
  for exclude in "$excludes"; do
    LS_ARGS="$LS_ARGS -x \"$exclude\""
  done
  for include in "$includes"; do
    LS_ARGS="$LS_ARGS -I \"$include\""
  done
  for symlink_dir in "$symlink_dirs"; do
    LS_ARGS="$LS_ARGS -S \"$symlink_dir\""
  done
  for never_symlink_dir in "$symlink_dirs"; do
    LS_ARGS="$LS_ARGS -s \"$never_symlink_dir\""
  done
  for undot in "$undotted"; do
    LS_ARGS="$LS_ARGS -U \"$undot\""
  done
  for never_undot in "$never_undotted"; do
    LS_ARGS="$LS_ARGS -u \"$never_undot\""
  done

  LS_ARGS="$LS_ARGS -B \"$hostname\" $files"

  $DEBUG "LS_ARGS: $LS_ARGS"
}

LS_ARGS=-F

handle_command_line "$@"
: ${DOTFILES_DIRS:=$DOTFILES_DIRS $DEFAULT_DOTFILES_DIR}

run_hooks pre down

dests_and_srcs="$(eval "lsrc $LS_ARGS")"

saved_ifs="$IFS"
IFS='
'
for dest_and_src in $dests_and_srcs; do
  IFS=:
  set -- $dest_and_src
  IFS="$saved_ifs"
  dest="$1"
  sigil="$3"

  remove_link "$dest" "$dest" "$sigil"
done

IFS="$saved_ifs"
run_hooks post down