module Refile
  module AttachmentHelper
    def attachment_url(record, name, *args, filename: nil, format: nil, host: nil)
      file = record.send(name)
      return unless file

      filename ||= name.to_s

      backend_name = Refile.backends.key(file.backend)
      host = host || Refile.host || request.base_url

      filename = filename.parameterize("_")
      filename << "." << format.to_s if format

      ::File.join(host, main_app.refile_app_path, backend_name, *args.map(&:to_s), file.id.to_s, filename)
    end

    def attachment_image_tag(record, name, *args, fallback: nil, format: nil, host: nil, **options)
      file = record.send(name)
      classes = ["attachment", record.class.model_name.singular, name, *options[:class]]

      if file
        image_tag(attachment_url(record, name, *args, format: format, host: host), options.merge(class: classes))
      elsif fallback
        classes << "fallback"
        image_tag(fallback, options.merge(class: classes))
      end
    end

    # @ignore
    #   rubocop:disable Metrics/AbcSize
    def attachment_field(object_name, method, options = {})
      options[:data] ||= {}

      if options[:object]
        attacher = options[:object].send(:"#{method}_attacher")
        options[:accept] = attacher.accept

        if options[:direct]
          host = options[:host] || Refile.host || request.base_url
          backend_name = Refile.backends.key(attacher.cache)

          url = ::File.join(host, main_app.refile_app_path, backend_name)
          options[:data].merge!(direct: true, as: "file", url: url)
        end

        if options[:presigned] and attacher.cache.respond_to?(:presign)
          options[:data].merge!(direct: true).merge!(attacher.cache.presign.as_json)
        end
      end
      hidden_field(object_name, :"#{method}_cache_id", options.slice(:object)) +
        file_field(object_name, method, options)
    end
  end
end