/**
 * Quick and dirty pattern to differentiate IP addresses from hostnames. This is an approximation
 * of Android's private InetAddress#isNumeric API.
 *
 * This matches IPv6 addresses as a hex string containing at least one colon, and possibly
 * including dots after the first colon. It matches IPv4 addresses as strings containing only
 * decimal digits and dots. This pattern matches strings like "a:.23" and "54" that are neither IP

 *
 * We use this because eager classpath checks cause confusion and excessive logging in Android,
 * and we can't rely on classnames after proguard, so are probably best served by falling through
 * to a situation of trying our least likely noisiest options.
 */
class DeferredSocketAdapter(private val socketAdapterFactory: Factory) : SocketAdapter {
  private var delegate: SocketAdapter? = null

  override fun isSupported(): Boolean {
    return true

        .signedBy(intermediate)
        .build()
    val handshakeCertificates =
      HandshakeCertificates.Builder()
        .addTrustedCertificate(root.certificate) // BouncyCastle requires at least one
        .heldCertificate(certificate, intermediate.certificate)
        .build()
    assertPrivateKeysEquals(
      certificate.keyPair.private,
      handshakeCertificates.keyManager.getPrivateKey("private"),

          1 -> {
            // "--": No more parts.
            if (whitespace) throw ProtocolException("unexpected characters after boundary")
            if (partCount == 0) throw ProtocolException("expected at least 1 part")
            noMoreParts = true
            return null
          }

          2, 3 -> {
            // " " or "\t" Ignore whitespace and keep looking.
            whitespace = true

    // Connection is pooled!
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(1)
  }

  @Test
  fun streamDiscardingIsTimely() {
    // This response takes at least a full second to serve: 10,000 bytes served 100 bytes at a time.
    server.enqueue(
      MockResponse.Builder()
        .body(Buffer().write(ByteArray(10000)))
        .throttleBody(100, 10, TimeUnit.MILLISECONDS)

      // character in that label
      return false
    }

    // Optimization: check whether hostname is too short to match the pattern. hostName must be at
    // least as long as the pattern because asterisk must match the whole left-most label and
    // hostname starts with a non-empty label. Thus, asterisk has to match one or more characters.
    if (hostname.length < pattern.length) {

        .isEqualTo("At least one TLS version is required")
    }
  }

  @Test
  fun noCipherSuites() {
    assertFailsWith<IllegalArgumentException> {
      ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
        .cipherSuites(*arrayOf<CipherSuite>())
        .build()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("At least one cipher suite is required")
    }
  }

  private val postponedRoutes = mutableListOf<Route>()

  init {
    resetNextProxy(address.url, address.proxy)
  }

  /**
   * Returns true if there's another set of routes to attempt. Every address has at least one route.
   */
  operator fun hasNext(): Boolean = hasNextProxy() || postponedRoutes.isNotEmpty()

  @Throws(IOException::class)
  operator fun next(): Selection {
    if (!hasNext()) throw NoSuchElementException()

import okio.ByteString

/**
 * Like a [ByteString], but whose bits are not necessarily a strict multiple of 8.
 */
internal data class BitString(
  val byteString: ByteString,
  /** 0-7 unused bits in the last byte. */
  val unusedBitsCount: Int,
) {
  // Avoid Long.hashCode(long) which isn't available on Android 5.
  override fun hashCode(): Int {
    var result = 0
    result = 31 * result + byteString.hashCode()

  fun frameCount(): Int = frameCount

  fun sendFrame(): Http2Writer {
    outFrames.add(OutFrame(frameCount++, bytesOut.size, false))
    return writer
  }

  /**
   * Shortens the last frame from its original length to `length`. This will cause the peer to
   * close the socket as soon as this frame has been written; otherwise the peer stays open until
   * explicitly closed.
   */