* @return mixed
     * @throws ServerException
     */
    protected function onErrorResponse(CommandInterface $command, ErrorResponseInterface $response)
    {
        if ($command instanceof ScriptCommand && $response->getErrorType() === 'NOSCRIPT') {
            $response = $this->executeCommand($command->getEvalCommand());

            if (!$response instanceof ResponseInterface) {
                $response = $command->parseResponse($response);
            }

            return $response;
        }

        if ($this->options->exceptions) {
            throw new ServerException($response->getMessage());
        }

        return $response;
    }

    /**
     * Executes the specified initializer method on `$this` by adjusting the
     * actual invocation depending on the arity (0, 1 or 2 arguments). This is
     * simply an utility method to create Redis contexts instances since they
     * follow a common initialization path.
     *
     * @param string $initializer Method name.
     * @param array  $argv        Arguments for the method.
     *
     * @return mixed
     */
    private function sharedContextFactory($initializer, $argv = null)
    {
        switch (count($argv)) {
            case 0:
                return $this->$initializer();

            case 1:
                return is_array($argv[0])
                    ? $this->$initializer($argv[0])
                    : $this->$initializer(null, $argv[0]);

            case 2:
                [$arg0, $arg1] = $argv;

                return $this->$initializer($arg0, $arg1);

            default:
                return $this->$initializer($this, $argv);
        }
    }

    /**
     * Creates a new pipeline context and returns it, or returns the results of
     * a pipeline executed inside the optionally provided callable object.
     *
     * @param mixed ...$arguments Array of options, a callable for execution, or both.
     *
     * @return Pipeline|array
     */
    public function pipeline(...$arguments)
    {
        return $this->sharedContextFactory('createPipeline', func_get_args());
    }

    /**
     * Actual pipeline context initializer method.
     *
     * @param array|null $options  Options for the context.
     * @param mixed      $callable Optional callable used to execute the context.
     *
     * @return Pipeline|array
     */
    protected function createPipeline(?array $options = null, $callable = null)
    {
        if (isset($options['atomic']) && $options['atomic']) {
            $class = Atomic::class;
        } elseif (isset($options['fire-and-forget']) && $options['fire-and-forget']) {
            $class = FireAndForget::class;
        } else {
            $class = Pipeline::class;
        }

        if ($this->connection instanceof RelayConnection) {
            if (isset($options['atomic']) && $options['atomic']) {
                $class = RelayAtomic::class;
            } elseif (isset($options['fire-and-forget']) && $options['fire-and-forget']) {
                throw new NotSupportedException('The "relay" extension does not support fire-and-forget pipelines.');
            } else {
                $class = RelayPipeline::class;
            }
        }

        /*
         * @var ClientContextInterface
         */
        $pipeline = new $class($this);

        if (isset($callable)) {
            return $pipeline->execute($callable);
        }

        return $pipeline;
    }

    /**
     * Creates a new transaction context and returns it, or returns the results
     * of a transaction executed inside the optionally provided callable object.
     *
     * @param mixed ...$arguments Array of options, a callable for execution, or both.
     *
     * @return MultiExecTransaction|array
     */
    public function transaction(...$arguments)
    {
        return $this->sharedContextFactory('createTransaction', func_get_args());
    }

    /**
     * Actual transaction context initializer method.
     *
     * @param array|null $options  Options for the context.
     * @param mixed      $callable Optional callable used to execute the context.
     *
     * @return MultiExecTransaction|array
     */
    protected function createTransaction(?array $options = null, $callable = null)
    {
        $transaction = new MultiExecTransaction($this, $options);

        if (isset($callable)) {
            return $transaction->execute($callable);
        }

        return $transaction;
    }

    /**
     * Creates a new publish/subscribe context and returns it, or starts its loop
     * inside the optionally provided callable object.
     *
     * @param mixed ...$arguments Array of options, a callable for execution, or both.
     *
     * @return PubSubConsumer|null
     */
    public function pubSubLoop(...$arguments)
    {
        return $this->sharedContextFactory('createPubSub', func_get_args());
    }

    /**
     * Actual publish/subscribe context initializer method.
     *
     * @param array|null $options  Options for the context.
     * @param mixed      $callable Optional callable used to execute the context.
     *
     * @return PubSubConsumer|null
     */
    protected function createPubSub(?array $options = null, $callable = null)
    {
        if ($this->connection instanceof RelayConnection) {
            $pubsub = new RelayPubSubConsumer($this, $options);
        } else {
            $pubsub = new PubSubConsumer($this, $options);
        }

        if (!isset($callable)) {
            return $pubsub;
        }

        foreach ($pubsub as $message) {
            if (call_user_func($callable, $pubsub, $message) === false) {
                $pubsub->stop();
            }
        }

        return null;
    }

    /**
     * Creates a new monitor consumer and returns it.
     *
     * @return MonitorConsumer
     */
    public function monitor()
    {
        return new MonitorConsumer($this);
    }

    /**
     * @return Traversable<string, static>
     */
    #[ReturnTypeWillChange]
    public function getIterator()
    {
        $clients = [];
        $connection = $this->getConnection();

        if (!$connection instanceof Traversable) {
            return new ArrayIterator([
                (string) $connection => new static($connection, $this->getOptions()),
            ]);
        }

        foreach ($connection as $node) {
            $clients[(string) $node] = new static($node, $this->getOptions());
        }

        return new ArrayIterator($clients);
    }
}