if ($modelMetadataDirectory instanceof WithHttpTransporterInterface) {
            $modelMetadataDirectory->setHttpTransporter($httpTransporter);
        }
        if (is_subclass_of($className, ProviderWithOperationsHandlerInterface::class)) {
            $operationsHandler = $className::operationsHandler();
            if ($operationsHandler instanceof WithHttpTransporterInterface) {
                $operationsHandler->setHttpTransporter($httpTransporter);
            }
        }
    }
    /**
     * Sets the request authentication for a specific provider, hooking up its class instances.
     *
     * @since 0.1.0
     *
     * @param class-string<ProviderInterface> $className The provider class name.
     * @param RequestAuthenticationInterface $requestAuthentication The authentication instance.
     *
     * @throws InvalidArgumentException If the authentication instance is not of the expected type.
     */
    private function setRequestAuthenticationForProvider(string $className, RequestAuthenticationInterface $requestAuthentication): void
    {
        $authenticationMethod = $className::metadata()->getAuthenticationMethod();
        if ($authenticationMethod === null) {
            throw new InvalidArgumentException(sprintf('Provider %s does not expect any authentication, but got %s.', $className, get_class($requestAuthentication)));
        }
        $expectedClass = $authenticationMethod->getImplementationClass();
        if (!$requestAuthentication instanceof $expectedClass) {
            throw new InvalidArgumentException(sprintf('Provider %s expects authentication of type %s, but got %s.', $className, $expectedClass, get_class($requestAuthentication)));
        }
        $availability = $className::availability();
        if ($availability instanceof WithRequestAuthenticationInterface) {
            $availability->setRequestAuthentication($requestAuthentication);
        }
        $modelMetadataDirectory = $className::modelMetadataDirectory();
        if ($modelMetadataDirectory instanceof WithRequestAuthenticationInterface) {
            $modelMetadataDirectory->setRequestAuthentication($requestAuthentication);
        }
        if (is_subclass_of($className, ProviderWithOperationsHandlerInterface::class)) {
            $operationsHandler = $className::operationsHandler();
            if ($operationsHandler instanceof WithRequestAuthenticationInterface) {
                $operationsHandler->setRequestAuthentication($requestAuthentication);
            }
        }
    }
    /**
     * Creates a default request authentication instance for a provider.
     *
     * @since 0.1.0
     *
     * @param class-string<ProviderInterface> $className The provider class name.
     * @return ?RequestAuthenticationInterface The default request authentication instance, or null if not required or
     *                                         if no credential data can be found.
     */
    private function createDefaultProviderRequestAuthentication(string $className): ?RequestAuthenticationInterface
    {
        $providerMetadata = $className::metadata();
        $providerId = $providerMetadata->getId();
        $authenticationMethod = $providerMetadata->getAuthenticationMethod();
        if ($authenticationMethod === null) {
            return null;
        }
        $authenticationClass = $authenticationMethod->getImplementationClass();
        if ($authenticationClass === null) {
            return null;
        }
        $authenticationSchema = $authenticationClass::getJsonSchema();
        // Iterate over all JSON schema object properties to try to determine the necessary authentication data.
        $authenticationData = [];
        if (isset($authenticationSchema['properties']) && is_array($authenticationSchema['properties'])) {
            /** @var array<string, mixed> $details */
            foreach ($authenticationSchema['properties'] as $property => $details) {
                $envVarName = $this->getEnvVarName($providerId, $property);
                // Try to get the value from environment variable or constant.
                $envValue = getenv($envVarName);
                if ($envValue === \false) {
                    if (!defined($envVarName)) {
                        continue;
                        // Skip if neither environment variable nor constant is defined.
                    }
                    $envValue = constant($envVarName);
                    if (!is_scalar($envValue)) {
                        continue;
                    }
                }
                if (isset($details['type'])) {
                    switch ($details['type']) {
                        case 'boolean':
                            $authenticationData[$property] = filter_var($envValue, \FILTER_VALIDATE_BOOLEAN);
                            break;
                        case 'number':
                            $authenticationData[$property] = (int) $envValue;
                            break;
                        case 'string':
                        default:
                            $authenticationData[$property] = (string) $envValue;
                    }
                } else {
                    // Default to string if no type is specified.
                    $authenticationData[$property] = (string) $envValue;
                }
            }
            // If any required fields are missing, return null to avoid immediate errors.
            if (isset($authenticationSchema['required']) && is_array($authenticationSchema['required'])) {
                /** @var list<string> $requiredProperties */
                $requiredProperties = $authenticationSchema['required'];
                if (array_diff_key(array_flip($requiredProperties), $authenticationData)) {
                    return null;
                }
            }
        }
        /** @var RequestAuthenticationInterface */
        /** @var array<string, mixed> $authenticationData */
        return $authenticationClass::fromArray($authenticationData);
    }
    /**
     * Checks if the given value is a registered provider class name.
     *
     * @since 0.4.0
     *
     * @param string $idOrClassName The value to check.
     * @return bool True if it's a registered class name.
     * @phpstan-assert-if-true class-string<ProviderInterface> $idOrClassName
     */
    private function isRegisteredClassName(string $idOrClassName): bool
    {
        return isset($this->registeredClassNamesToIds[$idOrClassName]);
    }
    /**
     * Checks if the given value is a registered provider ID.
     *
     * @since 0.4.0
     *
     * @param string $idOrClassName The value to check.
     * @return bool True if it's a registered provider ID.
     */
    private function isRegisteredId(string $idOrClassName): bool
    {
        return isset($this->registeredIdsToClassNames[$idOrClassName]);
    }
    /**
     * Converts a provider ID and field name to a constant case environment variable name.
     *
     * @since 0.1.0
     *
     * @param string $providerId The provider ID.
     * @param string $field The field name.
     * @return string The environment variable name in CONSTANT_CASE.
     */
    private function getEnvVarName(string $providerId, string $field): string
    {
        // Convert camelCase or kebab-case or snake_case to CONSTANT_CASE.
        $constantCaseProviderId = strtoupper((string) preg_replace('/([a-z])([A-Z])/', '$1_$2', str_replace('-', '_', $providerId)));
        $constantCaseField = strtoupper((string) preg_replace('/([a-z])([A-Z])/', '$1_$2', str_replace('-', '_', $field)));
        return "{$constantCaseProviderId}_{$constantCaseField}";
    }
}