module Mapbox
  module APIOperations
    module Request
      module ClassMethods
        OPTS_KEYS_TO_PERSIST = Set[:access_token, :api_base]

        def request(method, url, params={}, opts={})
          headers = opts.clone
          access_token = headers.delete(:access_token)
          api_base = headers.delete(:api_base)
          # Assume all remaining opts must be headers

          response, opts[:api_key] = Mapbox.request(method, url, access_token, params, headers, api_base)

          # Hash#select returns an array before 1.9
          opts_to_persist = {}
          opts.each do |k, v|
            if OPTS_KEYS_TO_PERSIST.include?(k)
              opts_to_persist[k] = v
            end
          end

          [response, opts_to_persist]
        end
      end

      def self.included(base)
        base.extend(ClassMethods)
      end

      protected

      def request(method, url, params={}, opts={})
        opts = @opts.merge(opts)
        self.class.request(method, url, params, opts)
      end
    end
  end
end
