# encoding: utf-8

module HTTPkit
  class Response
    NOT_INCLUDED = [204, 304]
    NOT_PRESENT = [205]

    include Support::Message
    include Adamantium

    attr_reader :status, :headers, :body, :http_version

    def initialize(status, headers = {}, body = '', http_version = 1.1)
      @status = status
      @headers = headers
      @body = Body.build(body)
      @http_version = http_version
    end

    def with_headers(new_headers)
      with(1, headers.merge(new_headers))
    end

    def with_body(new_body)
      with(2, Body.build(new_body))
    end

    def with(index, argument)
      args = [status, headers, body, http_version]
      args[index] = argument
      new_self(args)
    end

    def new_self(args)
      self.class.new(*args)
    end

    def body_included?
      !informational? && !NOT_INCLUDED.include?(status)
    end

    def body_present?
      !informational? && !NOT_PRESENT.include?(status)
    end

    def status_name
      STATUS_NAMES[status.to_i] || UNKNOWN_STATUS
    end

    def status_class
      status / 100
    end

    def informational?
      status_class == 1
    end

    def successful?
      status_class == 2
    end

    def redirection?
      status_class == 3
    end

    def client_error?
      status_class == 4
    end

    def server_error?
      status_class == 5
    end

    UNKNOWN_STATUS = 'Unknown Status'.freeze

    # TODO: double-check with RFC7230
    STATUS_NAMES =
      { 100 => 'Continue'.freeze,
        101 => 'Switching Protocols'.freeze,
        102 => 'Processing'.freeze,
        200 => 'OK'.freeze,
        201 => 'Created'.freeze,
        202 => 'Accepted'.freeze,
        203 => 'Non-Authoritative Information'.freeze,
        204 => 'No Content'.freeze,
        205 => 'Reset Content'.freeze,
        206 => 'Partial Content'.freeze,
        207 => 'Multi-Status'.freeze,
        208 => 'Already Reported'.freeze,
        226 => 'IM Used'.freeze,
        300 => 'Multiple Choices'.freeze,
        301 => 'Moved Permanently'.freeze,
        302 => 'Found'.freeze,
        303 => 'See Other'.freeze,
        304 => 'Not Modified'.freeze,
        305 => 'Use Proxy'.freeze,
        306 => 'Reserved'.freeze,
        307 => 'Temporary Redirect'.freeze,
        308 => 'Permanent Redirect'.freeze,
        400 => 'Bad Request'.freeze,
        401 => 'Unauthorized'.freeze,
        402 => 'Payment Required'.freeze,
        403 => 'Forbidden'.freeze,
        404 => 'Not Found'.freeze,
        405 => 'Method Not Allowed'.freeze,
        406 => 'Not Acceptable'.freeze,
        407 => 'Proxy Authentication Required'.freeze,
        408 => 'Request Timeout'.freeze,
        409 => 'Conflict'.freeze,
        410 => 'Gone'.freeze,
        411 => 'Length Required'.freeze,
        412 => 'Precondition Failed'.freeze,
        413 => 'Request Entity Too Large'.freeze,
        414 => 'Request-URI Too Long'.freeze,
        415 => 'Unsupported Media Type'.freeze,
        416 => 'Requested Range Not Satisfiable'.freeze,
        417 => 'Expectation Failed'.freeze,
        422 => 'Unprocessable Entity'.freeze,
        423 => 'Locked'.freeze,
        424 => 'Failed Dependency'.freeze,
        425 =>
          'Reserved for WebDAV advanced collections expired proposal'.freeze,
        426 => 'Upgrade Required'.freeze,
        427 => 'Unassigned'.freeze,
        428 => 'Precondition Required'.freeze,
        429 => 'Too Many Requests'.freeze,
        430 => 'Unassigned'.freeze,
        431 => 'Request Header Fields Too Large'.freeze,
        500 => 'Internal Server Error'.freeze,
        501 => 'Not Implemented'.freeze,
        502 => 'Bad Gateway'.freeze,
        503 => 'Service Unavailable'.freeze,
        504 => 'Gateway Timeout'.freeze,
        505 => 'HTTP Version Not Supported'.freeze,
        506 => 'Variant Also Negotiates (Experimental)'.freeze,
        507 => 'Insufficient Storage'.freeze,
        508 => 'Loop Detected'.freeze,
        509 => 'Unassigned'.freeze,
        510 => 'Not Extended'.freeze,
        511 => 'Network Authentication Required'.freeze }
  end
end