module Maglev::PagePreviewHelper

def maglev_alt_link(locale, links: nil)
  links ||= maglev_page_fullpaths
  link = links[locale.to_sym]
  return nil if link.nil?
  link.start_with?('http') ? link : "#{request.base_url}#{link}"
end

def maglev_current_locale?(locale)
  locale.to_sym == maglev_content_locale
end

def maglev_rendering_context
  {
    templates_root_path: maglev_sections_path,
    rendering_mode: maglev_rendering_mode,
    config: maglev_config
  }
end

def maglev_site_link
  maglev_site_root_fullpath
end

def render_maglev_alternate_links(links: nil, x_default_locale: nil)
  links ||= maglev_page_fullpaths
  x_default_locale ||= maglev_site.default_locale_prefix.to_sym
  return '' if links.blank? || links.size < 2
  safe_join(
    [tag.link(rel: 'alternate', hreflang: 'x-default', href: maglev_alt_link(x_default_locale))] +
    links.map do |(locale, _link)|
      tag.link(rel: 'alternate', hreflang: locale, href: maglev_alt_link(locale))
    end
  )
end

def render_maglev_section(type, site: nil, theme: nil, page: nil, page_sections: nil)
  sections = (page_sections || maglev_page_sections).find_all do |section|
    (section['type'] || section[:type]).start_with?(type.to_s)
  end
  render_maglev_sections(
    site: site,
    theme: theme,
    page: page,
    page_sections: sections
  )
end

def render_maglev_sections(site: nil, theme: nil, page: nil, page_sections: nil)
  PageComponent.new(
    site: site || maglev_site,
    theme: theme || maglev_theme,
    page: page || maglev_page,
    page_sections: page_sections || maglev_page_sections,
    context: maglev_rendering_context
  ).tap { |component| component.view_context = self }.render.html_safe
end

def rendering_maglev_page?
  controller.class.module_parent.to_s == 'Maglev'
end