module Onebox
  module Engine
    class ClassicGoogleMapsOnebox
      include Engine
      include LayoutSupport

      matches_regexp /^(https?:)?\/\/((maps|www)\.google\.[\w.]{2,}|goo\.gl)\/maps?.+$/

      def url
        @url = get_long_url if @url.include?("//goo.gl/maps/")
        @url = get_canonical_url if @url.include?("www.google")
        @url
      end

      def to_html
        "<iframe src='#{url}&output=embed' width='690px' height='400px' frameborder='0' style='border:0'></iframe>"
      end

      private

      def data
        {link: url, title: url}
      end

      def get_canonical_url
        uri = URI(@url)
        http = Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == 'https')
        http.open_timeout = timeout
        http.read_timeout = timeout
        response = http.head(uri.path)
        response["Location"].sub(/&?output=classic/, '') if response.code == "302"
      rescue
        @url
      end

      def get_long_url
        uri = URI(@url)
        http = Net::HTTP.start(uri.host, uri.port)
        http.open_timeout = timeout
        http.read_timeout = timeout
        response = http.head(uri.path)
        response["Location"] if response.code == "301"
      rescue
        @url
      end

    end
  end
end