require_relative "base_convert"
require_relative "init"
require "fileutils"
require "isodoc"
require_relative "metadata"

module IsoDoc
  module Ogc
    class HtmlConvert < IsoDoc::HtmlConvert
      def initialize(options)
        @libdir = File.dirname(__FILE__)
        super
      end

      def default_fonts(_options)
        {
          bodyfont: '"Overpass",sans-serif',
          headerfont: '"Overpass",sans-serif',
          monospacefont: '"Space Mono",monospace',
          normalfontsize: "16px",
          monospacefontsize: "0.8em",
          footnotefontsize: "0.9em",
        }
      end

      def default_file_locations(_options)
        {
          htmlstylesheet: html_doc_path("htmlstyle.scss"),
          htmlcoverpage: html_doc_path("html_ogc_titlepage.html"),
          htmlintropage: html_doc_path("html_ogc_intro.html"),
        }
      end

      def googlefonts
        <<~HEAD.freeze
          <link href="https://fonts.googleapis.com/css?family=Open+Sans:300,300i,400,400i,600,600i|Space+Mono:400,700" rel="stylesheet"/>
          <link href="https://fonts.googleapis.com/css?family=Overpass:300,300i,600,900" rel="stylesheet"/>
          <link href="https://fonts.googleapis.com/css?family=Teko:300,400,500" rel="stylesheet"/>
        HEAD
      end

      def admonition_class(node)
        case node["type"]
        when "important" then "Admonition Important"
        when "warning" then "Admonition Warning"
        when "caution" then "Admonition Caution"
        when "todo" then "Admonition Todo"
        when "editor" then "Admonition Editor"
        when "tip" then "Admonition Tip"
        when "safety-precaution" then "Admonition Safety-Precaution"
        else "Admonition"
        end
      end

      def make_body(xml, docxml)
        body_attr = { lang: "EN-US", link: "blue", vlink: "#954F72",
                      "xml:lang": "EN-US", class: "container" }
        xml.body **body_attr do |body|
          make_body1(body, docxml)
          make_body2(body, docxml)
          make_body3(body, docxml)
        end
      end

      def make_body3(body, docxml)
        @prefacenum = 0
        super
      end

      def authority_cleanup(docxml)
        authority_cleanup1(docxml, "contact")
        super
      end

      def html_head
        ret = super
        ret += html_head_kw
        ret += html_head_abstract
        ret += html_head_creator
        ret += html_head_date
        ret += html_head_title
        ret += html_head_dc
        ret
      end

      def html_head_abstract
        k = @meta.get[:abstract] and k = @c.encode(k)&.gsub("'", "&#x27;")
        (k.nil? || k.empty?) and return ""
        "<meta name='description' content='#{k}'/>\n" \
          "<meta name='DC.description' lang='#{@lang}' content='#{k}' />"
      end

      def html_head_kw
        k = @meta.get[:keywords].join(", ") and
          k = @c.encode(k).gsub("'", "&#x27;")
        k.empty? and return ""
        "<meta name='keywords' content='#{k}'/>" \
          "<meta name='DC.subject' lang='#{@lang}' content='#{k}' />"
      end

      def html_head_dc
        <<~HTML
          <link rel="profile" href="http://dublincore.org/documents/2008/08/04/dc-html/" />
          <link rel="schema.DC" href="http://purl.org/dc/elements/1.1/" />
          <meta name="DC.language" content="#{@lang}" />
          <meta name="DC.rights" lang="#{@lang}" content="CC-BY-4.0"/>
          <link rel="schema.DCTERMS" href="http://purl.org/dc/terms/" />
          <link rel="DCTERMS.license" href="https://www.ogc.org/license" />
        HTML
      end

      def html_head_creator
        k = @meta.get[:authors] and
          k = @c.encode(k.join(", ")).gsub("'", "&#x27;")
        (k.nil? || k.empty?) and return ""
        "<meta name='DC.creator' lang='#{@lang}' content='#{k}' />"
      end

      def html_head_date
        k = @meta.get[:revdate] || @meta.get[:ipublisheddate] and
          k = @c.encode(k)&.gsub("'", "&#x27;")
        (k.nil? || k.empty?) and return ""
        "<meta name='DC.date' content='#{k}' />"
      end

      def html_head_title
        k = @meta.get[:doctitle] and k = @c.encode(k)&.gsub("'", "&#x27;")
        (k.nil? || k.empty?) and return ""
        "<meta name='DC.title' lang='#{@lang}' content='#{k}' />"
      end

      def heading_anchors(html)
        super
        html.xpath("//p[@class = 'RecommendationTitle'] | " \
                   "//p[@class = 'RecommendationTestTitle']").each do |h|
          div = h.xpath("./ancestor::table[@id]")
          div.empty? and next
          heading_anchor(h, div[-1]["id"])
        end
        html
      end

      # to pass on to imported _coverpage.scss
      def scss_fontheader(is_html_css)
        super + <<~SCSS
          $color_text : #{@meta.get[:"presentation_metadata_color-text"].first};
          $color_background_page : #{@meta.get[:"presentation_metadata_color-background-page"].first};
          $color_background_definition_term : #{@meta.get[:"presentation_metadata_color-background-definition-term"].first};
          $color_background_definition_description : #{@meta.get[:"presentation_metadata_color-background-definition-description"].first};
          $color_secondary_shade_1 : #{@meta.get[:"presentation_metadata_color-secondary-shade-1"].first};
          $color_background : #f6f8fa;
        SCSS
      end

      include BaseConvert
      include Init
    end
  end
end