#!/usr/bin/env bash
###############################################################################
# clip
#
# A plugin for `nb` providing clipboard functionality.
#
# Author: hyb (https://github.com/ohyhyb)
###############################################################################

# Add the new subcommand names with `_subcommands add <name>`.
_subcommands add "clip"

# Define help and usage text with `_subcommands describe <subcommand> <usage>`.
_subcommands describe "clip" <<HEREDOC
Usage:
  nb clip [<notebook>:][<id> | <filename> | <path> | <title> | <extension>]

Description:
  Save the clipboard contents and copy contents of text or markdown items to
  the clipboard.

  When called with no arguments or when no matching file is found, the text
  content on the clipboard is saved to a new file, pending a prompt.

Examples:
  # copy the content of item 123 to the clipboard
  nb clip 123

  # save the clipboard contents to a new file with a \`.js\` file extension
  nb clip .js

  # save the clipboard contents as a new \`.cr\` file in the "snippets" notebook
  nb snippets:clip .cr
HEREDOC

# Define the subcommand as a function, named with a leading underscore.
_clip() {
  local _force=0
  local _selector=

  local __arg=
  for   __arg in "${@:-}"
  do
    case "${__arg:-}" in
      '')       :                     ;;
      --force)  _force=1              ;;
      *)        _selector="${__arg}"  ;;
    esac
  done

  local _source_relative_path=

  if [[ -n "${_selector:-}" ]]
  then
    _source_relative_path="$(
      _show "${_selector:-}" --relative-path 2>/dev/null || :
    )"
  fi

  local _notebook_path=
  _notebook_path="$(_notebooks current --path)"

  if _command_exists "_color_dim" && ! _command_exists "_color_muted"
  then
    _color_muted() { _color_dim "${@:-}"; }
  fi

  if [[   -z  "${_source_relative_path:-}"                    ]] ||
     [[ ! -e  "${_notebook_path}/${_source_relative_path}"    ]]
  then
    printf "Saving clipboard contents%s\\n" "$(_color_muted "...")"

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

        case ${__yn} in
          [Yy]*)
            break
            ;;
          *)
            printf "Exiting%s\\n" "$(_color_muted "...")"
            exit 0
            ;;
        esac
      done
    fi

    {
      if _command_exists "xclip" && [[ ! "${OSTYPE}" =~ ^darwin ]]
      then
        xclip -o
      elif _command_exists "pbpaste"
      then
        pbpaste
      fi
    } | {
      _add "${_selector}"
    }

    return 0
  elif [[ ! -f "${_notebook_path}/${_source_relative_path}"   ]]
  then
    printf "Not a file: %s\\n" "${_selector}"
    exit 1
  fi

  if _show "${_source_relative_path}" --type text ||
     _show "${_source_relative_path}" --type md
  then
    if _command_exists "xclip" && [[ ! "${OSTYPE}" =~ ^darwin ]]
    then
      cat "${_notebook_path}/${_source_relative_path}" | xclip -sel clip
    elif _command_exists "pbcopy"
    then
      cat "${_notebook_path}/${_source_relative_path}" | pbcopy
    fi && printf "Copied $(_color_primary "${_source_relative_path}") contents to clipboard.%s\\n"
  else
    _exit_1 printf "Not a text or markdown file.%s\\n"
  fi
}