module AIPP
  module LF

    class DPRAirspaces < AIP

      include AIPP::LF::Helpers::Base

      # Map source types to type and optional local type
      SOURCE_TYPES = {
        'D' => { type: 'D' },
        'P' => { type: 'P' },
        'R' => { type: 'R' },
        'ZIT' => { type: 'P', local_type: 'ZIT' }
      }.freeze

      # Radius to use for zones consisting of one point only
      POINT_RADIUS = AIXM.d(1, :km).freeze

      def parse
        SOURCE_TYPES.each do |source_type, target|
          verbose_info("processing #{source_type}")
          cache.espace.css(%Q(Espace[lk^="[LF][#{source_type} "])).each do |espace_node|
# UPSTREAM: Espace[pk=300343] has no Partie/Volume (reported)
next if espace_node['pk'] == '300343'
            partie_node = cache.partie.at_css(%Q(Partie:has(Espace[pk="#{espace_node['pk']}"])))
            volume_node = cache.volume.at_css(%Q(Volume:has(Partie[pk="#{partie_node['pk']}"])))
            name = "#{options[:region]}-#{source_type}#{espace_node.(:Nom)}".remove(/\s/)
            add(
              AIXM.airspace(
                source: source(section: 'ENR', position: espace_node.line),
                name: "#{name} #{partie_node.(:NomUsuel)}".strip,
                type: target[:type],
                local_type: target[:local_type]
              ).tap do |airspace|
                airspace.geometry = geometry_from(partie_node.(:Contour))
                if airspace.geometry.point?   # convert point to circle
                  airspace.geometry = AIXM.geometry(
                    AIXM.circle(
                      center_xy: airspace.geometry.segments.first.xy,
                      radius: POINT_RADIUS
                    )
                  )
                end
                fail("geometry is not closed") unless airspace.geometry.closed?
                airspace.add_layer layer_from(volume_node)
                airspace.layers.first.timetable = timetable_from(volume_node.(:HorCode))
                airspace.layers.first.remarks = volume_node.(:Activite)
              end
            )
          end
        end
      end

    end
  end
end