# frozen_string_literal: true

module TwilioBase
  module Protocols
    module Voice
      class Sip < Base
        UTU_HEADER_NAME = 'User-to-User'

        def endpoint
          "sip:#{sip_endpoint}?#{parsed_headers}"
        end

        def name
          :sip
        end

        def routing_method
          sip_refer_enabled? ? :refer : :dial
        end

        def routing_attributes
          sip_refer_enabled? ? refer_attribues : dial_attribues
        end

        private

        def parsed_headers
          hash = headers.each_with_object({}) do |(k, v), obj|
            key = k.to_s

            key = "X-#{key}" unless utu_header?(key)

            value = v.presence || '-'

            obj[key] = value
          end

          Addressable::URI.new(query_values: hash).query
        end

        def headers
          params[:headers].is_a?(Hash) ? params[:headers] : {}
        end

        def sip_endpoint
          sip_whip
        end

        def sip_refer_enabled?
          params[:sip_refer_enabled]
        end

        def refer_attribues
          { action: action_url }
        end

        def sip_whip
          @sip_whip ||= sip_endpoints.sample.to_s.strip
        end

        def sip_endpoints
          value = Array(to)

          value.flat_map { |v| v.split(',') }
        end

        def utu_header?(key)
          key == UTU_HEADER_NAME
        end
      end
    end
  end
end