# -*- encoding : utf-8 -*-

class UpdateFileAndImageCards < Card::CoreMigration
  def get_new_file_name filename
    original_filename = filename
    if filename =~ /^(icon|small|medium|large|original)-([^.]+).(.+)$/
      filename = "#{Regexp.last_match(2)}-#{Regexp.last_match(1)}.#{Regexp.last_match(3)}"
    end
    filename = filename.downcase
    filename if filename != original_filename
  end

  def up
    # use codenames for the filecards not for the left parts
    if (credit = Card[:credit]) && (card = Card.fetch "#{credit.name}+image")
      card.update_attributes! codename: 'credit_image'
    end
    %w( cerulean_skin cosmo_skin cyborg_skin darkly_skin flatly_skin journal_skin lumen_skin paper_skin readable_skin sandstone_skin simplex_skin slate_skin spacelab_skin superhero_skin united_skin yeti_skin ).each do |name|
      next unless (card = Card[name.to_sym])
      card.update_attributes! codename: nil
      if (card = Card.fetch "#{name}+image")
        card.update_attributes! codename: "#{name}_image"
      end
    end

    Card::Cache.reset_all
    Card.search(type: [:in, 'file', 'image']).each do |card|
      card.actions.each do |action|
        if (content_change = action.change :db_content)
          original_filename = content_change.value.split("\n").first
          action.update_attributes! comment: original_filename
        end
      end
      next unless card.content.present?
      attach_array = card.content.split "\n"
      attach_array[0].match(/\.(.+)$/) do |_match|
        extension = Regexp.last_match(1)
        if attach_array.size > 3  # mod file
          card.update_column :db_content, ":#{card.codename}/#{attach_array[3]}.#{extension}"
        else
          card.update_column :db_content, "~#{card.id}/#{card.last_action_id}.#{extension}"
        end
        # swap variant and action_id/type_code in file name
        if Dir.exist? card.store_dir
          symlink_target_hash = {}
          Dir.entries(card.store_dir).each do |file|
            next unless new_filename = get_new_file_name(file)
            file_path = File.join(card.store_dir, file)
            if File.symlink?(file_path)
              symlink_target_hash[new_filename] = File.readlink(file_path)
              File.unlink file_path
            else
              FileUtils.mv file_path, File.join(card.store_dir, new_filename)
            end
          end
          symlink_target_hash.each do |symlink, target|
            new_target_name = get_new_file_name(target)
            File.symlink File.join(card.store_dir, new_target_name), File.join(card.store_dir, symlink)
          end
        end
      end
    end
  end
end