#!/usr/bin/env bash

__filedirs()
{
  local IFS=$'\n'
  COMPREPLY=( $(compgen -o plusdirs -f -- "${cur}") )
  # COMPREPLY=( $(compgen -d) $(compgen -f -- "${cur}") )
}

__filedirs_all()
{
  COMPREPLY='.'
}

_mde_echo_version() {
  echo "<%= MarkdownExec::VERSION %>"
}

_mde() {
  local cur prev opts
  cur="${COMP_WORDS[COMP_CWORD]}"
  prev="${COMP_WORDS[COMP_CWORD-1]}"
  # printf '%s' "-;${prev}-:${cur}-"

  # current word is an option type
  # if previous word is an option name
  #   stage 2: replace with option default value
  #
  if [[ "${cur}" =~ ^\..+\.$ ]] ; then
    if [[ ${prev} == -* ]] ; then
      case $prev in
        <% svhs.each do |svh|

          svn = svh[:long_name]
          if svn && svh[:arg_name]
            svn = '--' + svh[:long_name]
            if svh[:compreply] == false
              # nothing
            elsif svh[:compreply].nil? %>
              <%= svn + ') __filedirs_all; return 0 ;;' %>
            <% elsif svh[:compreply].empty?
              # nothing
            else %>
              <%= svn + ') COMPREPLY="' + svh[:compreply] + '"; return 0 ;;' %>
            <% end
          end

          svn = svh[:short_name]
          if svn && svh[:arg_name]
            svn = '-' + svh[:short_name]
            if svh[:compreply] == false
              # nothing
            elsif svh[:compreply].nil? %>
              <%= svn + ') __filedirs_all; return 0 ;;' %>
            <% elsif svh[:compreply].empty?
              # nothing
            else %>
              <%= svn + ') COMPREPLY="' + svh[:compreply] + '"; return 0 ;;' %>
            <% end
          end

        end %>
      esac
    fi
  fi

  # current word is an option name or start of
  # present matching option names
  #
  if [[ ${cur} == -* ]] ; then
    opts=<%= mde_tab_completions %>
    COMPREPLY=( $(compgen -W "$(printf "'%s' " "${opts[@]}")" -- "${cur}") )

    return 0
  fi

  # no current word
  # if previous word is an option name
  #   stage 1: present option type 
  #
  if [[ -z ${cur} ]] ; then
    case $prev in
      <% svhs.each do |svh|

        svn = svh[:long_name]
        if svn && svh[:arg_name]
          svn = '--' + svh[:long_name] %>
          <%= svn + ') COMPREPLY=".' + svh[:arg_name] + '."; return 0 ;;' %>
        <% end

        svn = svh[:short_name]
        if svn && svh[:arg_name]
          svn = '-' + svh[:short_name] %>
          <%= svn + ') COMPREPLY=".' + svh[:arg_name] + '."; return 0 ;;' %>
        <% end
      end %>
    esac
  fi

  # current word is unrecognized
  # present matching directory or file names
  #
  __filedirs
}

complete -o filenames -o nospace -F _mde mde
# _mde_echo_version
# echo "Updated: <%= Time.now.utc %>"