# Copyright 2011 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
#     http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.

module AWS

  module Http

    # Represents the http response from a service request.
    #
    # Responses have:
    #
    # * status (200, 404, 500, etc)
    # * headers (hash of response headers)
    # * body (the response body)
    class Response

      # @return [Integer] (200) response http status code 
      attr_accessor :status

      # @return [Hash] ({}) response http headers
      attr_accessor :headers

      # @return [String] ('') response http body
      attr_accessor :body

      # @return [String] (false) set to true if the client gives up
      #   before getting a response from the service.
      attr_accessor :timeout
      alias_method :timeout?, :timeout

      # @param [Hash] options
      # @option options [Integer] :status (200) HTTP status code
      # @option options [Hash] :headers ({}) HTTP response headers
      # @option options [String] :body ('') HTTP response body
      def initialize options = {}, &block
        @status = options[:status] || 200
        @headers = options[:headers] || {}
        @body = options[:body] || ''
        yield(self) if block_given?
        self
      end

      # Returns the header value with the given name.
      #
      # The value is matched case-insensitively so if the headers hash
      # contains a key like 'Date' and you request the value for
      # 'date' the 'Date' value will be returned.
      #
      # @param [String,Symbol] name The name of the header to fetch a value for.
      # @return [String,nil] The value of the given header
      def header name
        headers.each_pair do |header_name, header_value|
          if header_name.downcase == name.to_s.downcase
            return header_value.is_a?(Array) ? header_value.first : header_value
          end
        end
        nil
      end

    end
  end
end