namespace :help do
  desc 'ヘルプ移行'
  task migrate: :environment do
    help_path = ENV.fetch('BTRC_HUB_HELP_PATH')
    abort if help_path.blank?

    # 現状物理削除はなぃはず
    pages = 
        WikiPage
        .joins(:tag_name)
        .where(tag_names: { tag_id: nil })
        .where.not("tag_names.name LIKE 'タググループ:%'")

    pages.find_each do |page|
      puts page.body
      puts page.title

      puts 'この identifier は何にする?'
      identifier = $stdin.gets.chomp
      Dir.mkdir "#{ help_path }/#{ identifier }"
      Dir.mkdir "#{ help_path }/#{ identifier }/editions"
      Dir.mkdir "#{ help_path }/#{ identifier }/editions/ja"

      last_file_name = ''
      WikiVersion.where(wiki_page_id: page.id).order(:version_no).each do |ver|
        last_file_name, last_file_name_no = last_file_name.split('.')

        file_name = ver.created_at.strftime('%Y-%m-%d')
        if file_name == last_file_name
          file_name += ".#{ (last_file_name_no || 1).to_i + 1 }"
        end

        File.write "#{ help_path }/#{ identifier }/editions/ja/#{ file_name }.mdx", ver.body

        last_file_name = file_name
      end

      article_meta = { 'identifier' => identifier,
                       'canonical_language' => 'ja',
                       'languages' => { 'ja' => { 'current_edition' => last_file_name } } }
      File.write "#{ help_path }/#{ identifier }/article.yml", article_meta.to_yaml
    end
  end
end