class ActionText::Content

def ==(other)
  if other.is_a?(self.class)
    to_s == other.to_s
  end
end

def append_attachables(attachables)
  attachments = ActionText::Attachment.from_attachables(attachables)
  self.class.new([self.to_s.presence, *attachments].compact.join("\n"))
end

def as_json(*)
  to_html
end

def attachables
  @attachables ||= attachment_nodes.map do |node|
    ActionText::Attachable.from_node(node)
  end
end

def attachment_for_node(node, with_full_attributes: true)
  attachment = ActionText::Attachment.from_node(node)
  with_full_attributes ? attachment.with_full_attributes : attachment
end

def attachment_galleries
  @attachment_galleries ||= attachment_gallery_nodes.map do |node|
    attachment_gallery_for_node(node)
  end
end

def attachment_gallery_for_node(node)
  ActionText::AttachmentGallery.from_node(node)
end

def attachment_gallery_nodes
  @attachment_gallery_nodes ||= ActionText::AttachmentGallery.find_attachment_gallery_nodes(fragment)
end

def attachment_nodes
  @attachment_nodes ||= fragment.find_all(ActionText::Attachment.tag_name)
end

def attachments
  @attachments ||= attachment_nodes.map do |node|
    attachment_for_node(node)
  end
end

def fragment_by_canonicalizing_content(content)
  fragment = ActionText::Attachment.fragment_by_canonicalizing_attachments(content)
  fragment = ActionText::AttachmentGallery.fragment_by_canonicalizing_attachment_galleries(fragment)
  fragment
end

def gallery_attachments
  @gallery_attachments ||= attachment_galleries.flat_map(&:attachments)
end

def initialize(content = nil, options = {})
  options.with_defaults! canonicalize: true
  if options[:canonicalize]
    @fragment = self.class.fragment_by_canonicalizing_content(content)
  else
    @fragment = ActionText::Fragment.wrap(content)
  end
end

def inspect
  "#<#{self.class.name} #{to_s.truncate(25).inspect}>"
end

def links
  @links ||= fragment.find_all("a[href]").map { |a| a["href"] }.uniq
end

def render_attachment_galleries(&block)
  content = ActionText::AttachmentGallery.fragment_by_replacing_attachment_gallery_nodes(fragment) do |node|
    block.call(attachment_gallery_for_node(node))
  end
  self.class.new(content, canonicalize: false)
end

def render_attachments(**options, &block)
  content = fragment.replace(ActionText::Attachment.tag_name) do |node|
    block.call(attachment_for_node(node, **options))
  end
  self.class.new(content, canonicalize: false)
end

def to_html
  fragment.to_html
end

def to_partial_path
  "action_text/contents/content"
end

def to_plain_text
  render_attachments(with_full_attributes: false, &:to_plain_text).fragment.to_plain_text
end

def to_rendered_html_with_layout
  render layout: "action_text/contents/content", partial: to_partial_path, formats: :html, locals: { content: self }
end

def to_s
  to_rendered_html_with_layout
end

def to_trix_html
  render_attachments(&:to_trix_attachment).to_html
end