import okhttp3.internal.format
import okhttp3.internal.ws.WebSocketProtocol.OPCODE_BINARY
import okhttp3.internal.ws.WebSocketProtocol.OPCODE_TEXT
import okhttp3.internal.ws.WebSocketProtocol.PAYLOAD_BYTE_MAX
import okhttp3.internal.ws.WebSocketProtocol.PAYLOAD_SHORT_MAX
import okio.Buffer
import okio.ByteString
import okio.ByteString.Companion.EMPTY
import okio.ByteString.Companion.decodeHex
import okio.ByteString.Companion.encodeUtf8

 * `permessage-deflate` and four parameters, `client_max_window_bits`, `client_no_context_takeover`,
 * `server_max_window_bits`, and `server_no_context_takeover`.
 *
 * Typically this will look like one of the following:
 *
 * ```
 * Sec-WebSocket-Extensions: permessage-deflate
 * Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits="15"
 * Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits=15

    assertThat(parse("permessage-deflate; client_max_window_bits=8")).isEqualTo(
      WebSocketExtensions(perMessageDeflate = true, clientMaxWindowBits = 8),
    )
    assertThat(parse("permessage-deflate; client_max_window_bits=\"8\"")).isEqualTo(
      WebSocketExtensions(perMessageDeflate = true, clientMaxWindowBits = 8),
    )
    assertThat(parse("permessage-deflate; client_max_window_bits=15")).isEqualTo(

            throw IOException("PROTOCOL_ERROR SETTINGS_MAX_FRAME_SIZE: $value")
          }
        }

        // SETTINGS_MAX_HEADER_LIST_SIZE
        6 -> { // Advisory only, so ignored.
        }

        // Must ignore setting with unknown id.
        else -> {
        }
      }
      settings[id] = value
    }
    handler.settings(false, settings)
  }

import okhttp3.internal.http2.Http2.FLAG_END_HEADERS
import okhttp3.internal.http2.Http2.FLAG_END_STREAM
import okhttp3.internal.http2.Http2.FLAG_NONE
import okhttp3.internal.http2.Http2.INITIAL_MAX_FRAME_SIZE
import okhttp3.internal.http2.Http2.TYPE_CONTINUATION
import okhttp3.internal.http2.Http2.TYPE_DATA
import okhttp3.internal.http2.Http2.TYPE_GOAWAY
import okhttp3.internal.http2.Http2.TYPE_HEADERS

   * special values [PAYLOAD_SHORT] or [PAYLOAD_LONG].
   */
  internal const val PAYLOAD_BYTE_MAX = 125L

  /** Maximum length of close message in bytes. */
  internal const val CLOSE_MESSAGE_MAX = PAYLOAD_BYTE_MAX - 2

  /**
   * Value for [B1_MASK_LENGTH] which indicates the next two bytes are the unsigned length.
   */
  internal const val PAYLOAD_SHORT = 126

          }
        val deltaI = digit * w
        if (i > Int.MAX_VALUE - deltaI) return false // Prevent overflow.
        i += deltaI
        val t =
          when {
            k <= bias -> TMIN
            k >= bias + TMAX -> TMAX
            else -> k - bias
          }
        if (digit < t) break
        val scaleW = BASE - t
        if (w > Int.MAX_VALUE / scaleW) return false // Prevent overflow.
        w *= scaleW

  }

  @Test
  @Throws(Exception::class)
  fun serverMaxWindowBitsTooLow() {
    extensionNegotiationFailure("permessage-deflate; server_max_window_bits=7")
  }

  @Test
  @Throws(Exception::class)
  fun serverMaxWindowBitsTooHigh() {
    extensionNegotiationFailure("permessage-deflate; server_max_window_bits=16")
  }

  @Test

    if (unknownValues) return false

    // If the server returned a value for client_max_window_bits, fail the web socket.
    if (clientMaxWindowBits != null) return false

    // If the server returned an illegal server_max_window_bits, fail the web socket.
    if (serverMaxWindowBits != null && serverMaxWindowBits !in 8..15) return false

    // Success.
    return true

    assertThat(readAscii(gunzippedIn, Int.MAX_VALUE)).isEqualTo("one (gzipped)")
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)
    val response2 =
      getResponse(
        Request.Builder()
          .url(server.url("/"))
          .build(),
      )
    assertThat(readAscii(response2.body.byteStream(), Int.MAX_VALUE)).isEqualTo("two (identity)")