module HTTPX
  interface _Response
    def raise_for_status: () -> void
  end

  class Response
    extend Forwardable

    include _Response
    include _ToS
    include _Reader

    attr_reader status: Integer
    attr_reader headers: Headers
    attr_reader body: Body
    attr_reader version: String

    @options: Options
    @request: Request

    def copy_to: (_ToPath | _Writer destination) -> void
    def close: () -> void
    def uri: () -> URI::Generic

    def merge_headers: (_Each[[headers_key, headers_value]]) -> void
    def bodyless?: () -> bool
    def content_type: () -> ContentType
    def complete?: () -> bool

    private

    def initialize: (Request request, String | Integer status, String version, headers?) -> untyped
    def no_data?: () -> bool

    class Body
      include _Reader
      include _ToS
      include _ToStr

      @state: :idle | :memory | :buffer | :closed
      @threshold_size: Integer
      @window_size: Integer

      def write:(String chunk) -> Integer?

      def each: () { (String) -> void } -> void
              | () -> Enumerable[String]

      def bytesize: () -> Numeric
      def empty?: () -> bool
      def copy_to: (String | File | _Writer destination) -> void
      def close: () -> void
      def closed?: () -> bool

      private

      def initialize: (Response, Options) -> untyped
      def rewind: () -> void
      def transition: () -> void
    end
  end

  class ContentType
    MIME_TYPE_RE: Regexp
    CHARSET_RE: Regexp

    attr_reader mime_type: String?
    attr_reader charset: String?

    def self.parse: (_ToS) -> ContentType
    def self.mime_type: (_ToS) -> String?
    def self.charset: (_ToS) -> String?

    private

    def initialize: (String?, String?) -> untyped
  end

  class ErrorResponse
    include _Response
    include Loggable

    @options: Options

    attr_reader request: Request
    attr_reader error: Exception

    def status: () -> (Integer | _ToS)

    private

    def initialize: (Request, Exception, options) -> untyped
  end

  type response = Response | ErrorResponse
end