#!/usr/bin/env bash
###############################################################################
# annotate.dev.nb-plugin
#
# An annotate plugin for `nb`.
#
# Install with:
#   nb plugin install https://github.com/xwmx/nb/blob/master/plugins/annotate.dev.nb-plugin
#
# https://github.com/xwmx/nb
###############################################################################

# Add the new subcommand name with `_subcommands add <name>`.
_subcommands add "annotate"
_subcommands add "annotations"

# Define help and usage text with `_subcommands describe <subcommand> <usage>`.
_subcommands describe "annotate" <<HEREDOC
$(_color_primary "Usage"):
  nb annotate ([<notebook>:][<folder-path>/][<id> | <filename> | <title>])
  nb annotate delete ([<notebook>:][<folder-path>/][<id> | <filename> | <title>])
  nb annotate show ([<notebook>:][<folder-path>/][<id> | <filename> | <title>])

$(_color_primary "Subcommands"):
  (default) Add or edit annotations for an item.
  delete    Delete annotations for an item.
  show      Show annotations for an item.

$(_color_primary "Description"):
  Add, edit, show, or delete annotations for an item.
HEREDOC

# Define the subcommand as a function, named with a leading underscore.
_annotate() {
  local _selector=
  local _subcommand="edit"

  local __arg=
  for   __arg in "${@:-}"
  do
    case "${__arg:-}" in
      '')
        :
        ;;
      add|edit)
        _subcommand="edit"
        ;;
      delete)
        _subcommand="delete"
        ;;
      show)
        _subcommand="show"
        ;;
      *)
        _selector="${__arg}"
        ;;
    esac
  done

  local _selector_path=
  _selector_path="$(_show "${_selector:-}" --path 2>/dev/null || :)"

  local _selector_info_line=
  _selector_info_line="$(_show "${_selector:-}" --info-line 2>/dev/null || :)"

  local _annotations_basename=
  _annotations_basename=".$(basename ".${_selector_path:-}").annotations.md"

  local _annotations_directory_path=
  _annotations_directory_path="$(dirname "${_selector_path}")"

  local _annotations_path="${_annotations_directory_path}/${_annotations_basename}"

  if [[ ! -e "${TMPDIR}/nb-annotate-dev-plugin-enabled" ]]
  then
    cat <<HEREDOC
This plugin is experimental and the implementation could change without notice.
HEREDOC

    while true
    do
      local __yn=
      IFS='' read -r -e -d $'\n' -p \
"$(_color_primary "Proceed?") $(_color_brackets "y/N") " __yn

      case "${__yn}" in
        [Yy]*)
          touch "${TMPDIR}/nb-annotate-dev-plugin-enabled"

          break
          ;;
        *)
          printf "Exiting%s\\n" "$(_color_muted "...")"

          exit 0
          ;;
      esac
    done
  fi

  case "${_subcommand:-}" in
    edit)
      if [[ ! -e "${_annotations_path:-}"     ]]
      then
        _add                                  \
          --edit                              \
          --filename "${_annotations_path:-}" \
          --no-template                       \
          --quiet                             &&
          printf "Annotated: %s\\n" "${_selector_info_line}"
      else
        _edit "${_annotations_path:-}"        \
          --quiet                             &&
          printf "Annotated: %s\\n" "${_selector_info_line}"
      fi
      ;;
    delete)
      if [[ -e "${_annotations_path:-}"       ]]
      then
        _delete "${_annotations_path:-}"      \
          --quiet                             &&
          printf "Annotations deleted: %s\\n" "${_selector_info_line}"
      else
        _warn printf "No annotations found: %s\\n" \
          "$(_color_primary "${_selector:-}")"

        return 1
      fi
      ;;
    show)
      if [[ -e "${_annotations_path:-}" ]]
      then
        _show "${_annotations_path:-}"
      else
        _warn printf "No annotations found: %s\\n" \
          "$(_color_primary "${_selector:-}")"

        return 1
      fi
      ;;
  esac
}
_alias_subcommand "annotate" "annotations"