<?php
/*
 * Copyright 2018 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * GENERATED CODE WARNING
 * Generated by gapic-generator-php from the file
 * https://github.com/google/googleapis/blob/master/google/cloud/dialogflow/v2/document.proto
 * Updates to the above are reflected here through a refresh process.
 */

namespace Google\Cloud\Dialogflow\V2\Gapic;

use Google\ApiCore\ApiException;
use Google\ApiCore\CredentialsWrapper;
use Google\ApiCore\GapicClientTrait;

use Google\ApiCore\LongRunning\OperationsClient;
use Google\ApiCore\OperationResponse;
use Google\ApiCore\PathTemplate;

use Google\ApiCore\RequestParamsHeaderDescriptor;
use Google\ApiCore\RetrySettings;
use Google\ApiCore\Transport\TransportInterface;
use Google\ApiCore\ValidationException;
use Google\Auth\FetchAuthTokenInterface;
use Google\Cloud\Dialogflow\V2\CreateDocumentRequest;
use Google\Cloud\Dialogflow\V2\DeleteDocumentRequest;
use Google\Cloud\Dialogflow\V2\Document;
use Google\Cloud\Dialogflow\V2\GetDocumentRequest;
use Google\Cloud\Dialogflow\V2\KnowledgeOperationMetadata;
use Google\Cloud\Dialogflow\V2\ListDocumentsRequest;
use Google\Cloud\Dialogflow\V2\ListDocumentsResponse;
use Google\Cloud\Dialogflow\V2\ReloadDocumentRequest;
use Google\Cloud\Dialogflow\V2\UpdateDocumentRequest;
use Google\LongRunning\Operation;
use Google\Protobuf\FieldMask;

/**
 * Service Description: Service for managing knowledge [Documents][google.cloud.dialogflow.v2.Document].
 *
 * This class provides the ability to make remote calls to the backing service through method
 * calls that map to API methods. Sample code to get started:
 *
 * ```
 * $documentsClient = new DocumentsClient();
 * try {
 *     $formattedParent = $documentsClient->knowledgeBaseName('[PROJECT]', '[KNOWLEDGE_BASE]');
 *     $document = new Document();
 *     $operationResponse = $documentsClient->createDocument($formattedParent, $document);
 *     $operationResponse->pollUntilComplete();
 *     if ($operationResponse->operationSucceeded()) {
 *         $result = $operationResponse->getResult();
 *     // doSomethingWith($result)
 *     } else {
 *         $error = $operationResponse->getError();
 *         // handleError($error)
 *     }
 *     // Alternatively:
 *     // start the operation, keep the operation name, and resume later
 *     $operationResponse = $documentsClient->createDocument($formattedParent, $document);
 *     $operationName = $operationResponse->getName();
 *     // ... do other work
 *     $newOperationResponse = $documentsClient->resumeOperation($operationName, 'createDocument');
 *     while (!$newOperationResponse->isDone()) {
 *         // ... do other work
 *         $newOperationResponse->reload();
 *     }
 *     if ($newOperationResponse->operationSucceeded()) {
 *         $result = $newOperationResponse->getResult();
 *     // doSomethingWith($result)
 *     } else {
 *         $error = $newOperationResponse->getError();
 *         // handleError($error)
 *     }
 * } finally {
 *     $documentsClient->close();
 * }
 * ```
 *
 * Many parameters require resource names to be formatted in a particular way. To
 * assist with these names, this class includes a format method for each type of
 * name, and additionally a parseName method to extract the individual identifiers
 * contained within formatted names that are returned by the API.
 */
class DocumentsGapicClient
{
    use GapicClientTrait;

    /**
     * The name of the service.
     */
    const SERVICE_NAME = 'google.cloud.dialogflow.v2.Documents';

    /**
     * The default address of the service.
     */
    const SERVICE_ADDRESS = 'dialogflow.googleapis.com';

    /**
     * The default port of the service.
     */
    const DEFAULT_SERVICE_PORT = 443;

    /**
     * The name of the code generator, to be included in the agent header.
     */
    const CODEGEN_NAME = 'gapic';

    /**
     * The default scopes required by the service.
     */
    public static $serviceScopes = [
        'https://www.googleapis.com/auth/cloud-platform',
        'https://www.googleapis.com/auth/dialogflow',
    ];

    private static $documentNameTemplate;

    private static $knowledgeBaseNameTemplate;

    private static $projectKnowledgeBaseNameTemplate;

    private static $projectKnowledgeBaseDocumentNameTemplate;

    private static $projectLocationKnowledgeBaseNameTemplate;

    private static $projectLocationKnowledgeBaseDocumentNameTemplate;

    private static $pathTemplateMap;

    private $operationsClient;

    private static function getClientDefaults()
    {
        return [
            'serviceName' => self::SERVICE_NAME,
            'apiEndpoint' => self::SERVICE_ADDRESS . ':' . self::DEFAULT_SERVICE_PORT,
            'clientConfig' => __DIR__ . '/../resources/documents_client_config.json',
            'descriptorsConfigPath' => __DIR__ . '/../resources/documents_descriptor_config.php',
            'gcpApiConfigPath' => __DIR__ . '/../resources/documents_grpc_config.json',
            'credentialsConfig' => [
                'defaultScopes' => self::$serviceScopes,
            ],
            'transportConfig' => [
                'rest' => [
                    'restClientConfigPath' => __DIR__ . '/../resources/documents_rest_client_config.php',
                ],
            ],
        ];
    }

    private static function getDocumentNameTemplate()
    {
        if (self::$documentNameTemplate == null) {
            self::$documentNameTemplate = new PathTemplate('projects/{project}/knowledgeBases/{knowledge_base}/documents/{document}');
        }

        return self::$documentNameTemplate;
    }

    private static function getKnowledgeBaseNameTemplate()
    {
        if (self::$knowledgeBaseNameTemplate == null) {
            self::$knowledgeBaseNameTemplate = new PathTemplate('projects/{project}/knowledgeBases/{knowledge_base}');
        }

        return self::$knowledgeBaseNameTemplate;
    }

    private static function getProjectKnowledgeBaseNameTemplate()
    {
        if (self::$projectKnowledgeBaseNameTemplate == null) {
            self::$projectKnowledgeBaseNameTemplate = new PathTemplate('projects/{project}/knowledgeBases/{knowledge_base}');
        }

        return self::$projectKnowledgeBaseNameTemplate;
    }

    private static function getProjectKnowledgeBaseDocumentNameTemplate()
    {
        if (self::$projectKnowledgeBaseDocumentNameTemplate == null) {
            self::$projectKnowledgeBaseDocumentNameTemplate = new PathTemplate('projects/{project}/knowledgeBases/{knowledge_base}/documents/{document}');
        }

        return self::$projectKnowledgeBaseDocumentNameTemplate;
    }

    private static function getProjectLocationKnowledgeBaseNameTemplate()
    {
        if (self::$projectLocationKnowledgeBaseNameTemplate == null) {
            self::$projectLocationKnowledgeBaseNameTemplate = new PathTemplate('projects/{project}/locations/{location}/knowledgeBases/{knowledge_base}');
        }

        return self::$projectLocationKnowledgeBaseNameTemplate;
    }

    private static function getProjectLocationKnowledgeBaseDocumentNameTemplate()
    {
        if (self::$projectLocationKnowledgeBaseDocumentNameTemplate == null) {
            self::$projectLocationKnowledgeBaseDocumentNameTemplate = new PathTemplate('projects/{project}/locations/{location}/knowledgeBases/{knowledge_base}/documents/{document}');
        }

        return self::$projectLocationKnowledgeBaseDocumentNameTemplate;
    }

    private static function getPathTemplateMap()
    {
        if (self::$pathTemplateMap == null) {
            self::$pathTemplateMap = [
                'document' => self::getDocumentNameTemplate(),
                'knowledgeBase' => self::getKnowledgeBaseNameTemplate(),
                'projectKnowledgeBase' => self::getProjectKnowledgeBaseNameTemplate(),
                'projectKnowledgeBaseDocument' => self::getProjectKnowledgeBaseDocumentNameTemplate(),
                'projectLocationKnowledgeBase' => self::getProjectLocationKnowledgeBaseNameTemplate(),
                'projectLocationKnowledgeBaseDocument' => self::getProjectLocationKnowledgeBaseDocumentNameTemplate(),
            ];
        }

        return self::$pathTemplateMap;
    }

    /**
     * Formats a string containing the fully-qualified path to represent a document
     * resource.
     *
     * @param string $project
     * @param string $knowledgeBase
     * @param string $document
     *
     * @return string The formatted document resource.
     */
    public static function documentName($project, $knowledgeBase, $document)
    {
        return self::getDocumentNameTemplate()->render([
            'project' => $project,
            'knowledge_base' => $knowledgeBase,
            'document' => $document,
        ]);
    }

    /**
     * Formats a string containing the fully-qualified path to represent a
     * knowledge_base resource.
     *
     * @param string $project
     * @param string $knowledgeBase
     *
     * @return string The formatted knowledge_base resource.
     */
    public static function knowledgeBaseName($project, $knowledgeBase)
    {
        return self::getKnowledgeBaseNameTemplate()->render([
            'project' => $project,
            'knowledge_base' => $knowledgeBase,
        ]);
    }

    /**
     * Formats a string containing the fully-qualified path to represent a
     * project_knowledge_base resource.
     *
     * @param string $project
     * @param string $knowledgeBase
     *
     * @return string The formatted project_knowledge_base resource.
     */
    public static function projectKnowledgeBaseName($project, $knowledgeBase)
    {
        return self::getProjectKnowledgeBaseNameTemplate()->render([
            'project' => $project,
            'knowledge_base' => $knowledgeBase,
        ]);
    }

    /**
     * Formats a string containing the fully-qualified path to represent a
     * project_knowledge_base_document resource.
     *
     * @param string $project
     * @param string $knowledgeBase
     * @param string $document
     *
     * @return string The formatted project_knowledge_base_document resource.
     */
    public static function projectKnowledgeBaseDocumentName($project, $knowledgeBase, $document)
    {
        return self::getProjectKnowledgeBaseDocumentNameTemplate()->render([
            'project' => $project,
            'knowledge_base' => $knowledgeBase,
            'document' => $document,
        ]);
    }

    /**
     * Formats a string containing the fully-qualified path to represent a
     * project_location_knowledge_base resource.
     *
     * @param string $project
     * @param string $location
     * @param string $knowledgeBase
     *
     * @return string The formatted project_location_knowledge_base resource.
     */
    public static function projectLocationKnowledgeBaseName($project, $location, $knowledgeBase)
    {
        return self::getProjectLocationKnowledgeBaseNameTemplate()->render([
            'project' => $project,
            'location' => $location,
            'knowledge_base' => $knowledgeBase,
        ]);
    }

    /**
     * Formats a string containing the fully-qualified path to represent a
     * project_location_knowledge_base_document resource.
     *
     * @param string $project
     * @param string $location
     * @param string $knowledgeBase
     * @param string $document
     *
     * @return string The formatted project_location_knowledge_base_document resource.
     */
    public static function projectLocationKnowledgeBaseDocumentName($project, $location, $knowledgeBase, $document)
    {
        return self::getProjectLocationKnowledgeBaseDocumentNameTemplate()->render([
            'project' => $project,
            'location' => $location,
            'knowledge_base' => $knowledgeBase,
            'document' => $document,
        ]);
    }

    /**
     * Parses a formatted name string and returns an associative array of the components in the name.
     * The following name formats are supported:
     * Template: Pattern
     * - document: projects/{project}/knowledgeBases/{knowledge_base}/documents/{document}
     * - knowledgeBase: projects/{project}/knowledgeBases/{knowledge_base}
     * - projectKnowledgeBase: projects/{project}/knowledgeBases/{knowledge_base}
     * - projectKnowledgeBaseDocument: projects/{project}/knowledgeBases/{knowledge_base}/documents/{document}
     * - projectLocationKnowledgeBase: projects/{project}/locations/{location}/knowledgeBases/{knowledge_base}
     * - projectLocationKnowledgeBaseDocument: projects/{project}/locations/{location}/knowledgeBases/{knowledge_base}/documents/{document}
     *
     * The optional $template argument can be supplied to specify a particular pattern,
     * and must match one of the templates listed above. If no $template argument is
     * provided, or if the $template argument does not match one of the templates
     * listed, then parseName will check each of the supported templates, and return
     * the first match.
     *
     * @param string $formattedName The formatted name string
     * @param string $template      Optional name of template to match
     *
     * @return array An associative array from name component IDs to component values.
     *
     * @throws ValidationException If $formattedName could not be matched.
     */
    public static function parseName($formattedName, $template = null)
    {
        $templateMap = self::getPathTemplateMap();
        if ($template) {
            if (!isset($templateMap[$template])) {
                throw new ValidationException("Template name $template does not exist");
            }

            return $templateMap[$template]->match($formattedName);
        }

        foreach ($templateMap as $templateName => $pathTemplate) {
            try {
                return $pathTemplate->match($formattedName);
            } catch (ValidationException $ex) {
                // Swallow the exception to continue trying other path templates
            }
        }

        throw new ValidationException("Input did not match any known format. Input: $formattedName");
    }

    /**
     * Return an OperationsClient object with the same endpoint as $this.
     *
     * @return OperationsClient
     */
    public function getOperationsClient()
    {
        return $this->operationsClient;
    }

    /**
     * Resume an existing long running operation that was previously started by a long
     * running API method. If $methodName is not provided, or does not match a long
     * running API method, then the operation can still be resumed, but the
     * OperationResponse object will not deserialize the final response.
     *
     * @param string $operationName The name of the long running operation
     * @param string $methodName    The name of the method used to start the operation
     *
     * @return OperationResponse
     */
    public function resumeOperation($operationName, $methodName = null)
    {
        $options = isset($this->descriptors[$methodName]['longRunning']) ? $this->descriptors[$methodName]['longRunning'] : [];
        $operation = new OperationResponse($operationName, $this->getOperationsClient(), $options);
        $operation->reload();
        return $operation;
    }

    /**
     * Constructor.
     *
     * @param array $options {
     *     Optional. Options for configuring the service API wrapper.
     *
     *     @type string $serviceAddress
     *           **Deprecated**. This option will be removed in a future major release. Please
     *           utilize the `$apiEndpoint` option instead.
     *     @type string $apiEndpoint
     *           The address of the API remote host. May optionally include the port, formatted
     *           as "<uri>:<port>". Default 'dialogflow.googleapis.com:443'.
     *     @type string|array|FetchAuthTokenInterface|CredentialsWrapper $credentials
     *           The credentials to be used by the client to authorize API calls. This option
     *           accepts either a path to a credentials file, or a decoded credentials file as a
     *           PHP array.
     *           *Advanced usage*: In addition, this option can also accept a pre-constructed
     *           {@see \Google\Auth\FetchAuthTokenInterface} object or
     *           {@see \Google\ApiCore\CredentialsWrapper} object. Note that when one of these
     *           objects are provided, any settings in $credentialsConfig will be ignored.
     *     @type array $credentialsConfig
     *           Options used to configure credentials, including auth token caching, for the
     *           client. For a full list of supporting configuration options, see
     *           {@see \Google\ApiCore\CredentialsWrapper::build()} .
     *     @type bool $disableRetries
     *           Determines whether or not retries defined by the client configuration should be
     *           disabled. Defaults to `false`.
     *     @type string|array $clientConfig
     *           Client method configuration, including retry settings. This option can be either
     *           a path to a JSON file, or a PHP array containing the decoded JSON data. By
     *           default this settings points to the default client config file, which is
     *           provided in the resources folder.
     *     @type string|TransportInterface $transport
     *           The transport used for executing network requests. May be either the string
     *           `rest` or `grpc`. Defaults to `grpc` if gRPC support is detected on the system.
     *           *Advanced usage*: Additionally, it is possible to pass in an already
     *           instantiated {@see \Google\ApiCore\Transport\TransportInterface} object. Note
     *           that when this object is provided, any settings in $transportConfig, and any
     *           $serviceAddress setting, will be ignored.
     *     @type array $transportConfig
     *           Configuration options that will be used to construct the transport. Options for
     *           each supported transport type should be passed in a key for that transport. For
     *           example:
     *           $transportConfig = [
     *               'grpc' => [...],
     *               'rest' => [...],
     *           ];
     *           See the {@see \Google\ApiCore\Transport\GrpcTransport::build()} and
     *           {@see \Google\ApiCore\Transport\RestTransport::build()} methods for the
     *           supported options.
     * }
     *
     * @throws ValidationException
     */
    public function __construct(array $options = [])
    {
        $clientOptions = $this->buildClientOptions($options);
        $this->setClientOptions($clientOptions);
        $this->operationsClient = $this->createOperationsClient($clientOptions);
    }

    /**
     * Creates a new document.
     *
     * Operation <response: [Document][google.cloud.dialogflow.v2.Document],
     * metadata: [KnowledgeOperationMetadata][google.cloud.dialogflow.v2.KnowledgeOperationMetadata]>
     *
     * Sample code:
     * ```
     * $documentsClient = new DocumentsClient();
     * try {
     *     $formattedParent = $documentsClient->knowledgeBaseName('[PROJECT]', '[KNOWLEDGE_BASE]');
     *     $document = new Document();
     *     $operationResponse = $documentsClient->createDocument($formattedParent, $document);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         $result = $operationResponse->getResult();
     *     // doSomethingWith($result)
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $documentsClient->createDocument($formattedParent, $document);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $documentsClient->resumeOperation($operationName, 'createDocument');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         $result = $newOperationResponse->getResult();
     *     // doSomethingWith($result)
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $documentsClient->close();
     * }
     * ```
     *
     * @param string   $parent       Required. The knowledge base to create a document for.
     *                               Format: `projects/<Project ID>/locations/<Location
     *                               ID>/knowledgeBases/<Knowledge Base ID>`.
     * @param Document $document     Required. The document to create.
     * @param array    $optionalArgs {
     *     Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a
     *           {@see Google\ApiCore\RetrySettings} object, or an associative array of retry
     *           settings parameters. See the documentation on
     *           {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function createDocument($parent, $document, array $optionalArgs = [])
    {
        $request = new CreateDocumentRequest();
        $requestParamHeaders = [];
        $request->setParent($parent);
        $request->setDocument($document);
        $requestParamHeaders['parent'] = $parent;
        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('CreateDocument', $optionalArgs, $request, $this->getOperationsClient())->wait();
    }

    /**
     * Deletes the specified document.
     *
     * Operation <response: [google.protobuf.Empty][google.protobuf.Empty],
     * metadata: [KnowledgeOperationMetadata][google.cloud.dialogflow.v2.KnowledgeOperationMetadata]>
     *
     * Sample code:
     * ```
     * $documentsClient = new DocumentsClient();
     * try {
     *     $formattedName = $documentsClient->documentName('[PROJECT]', '[KNOWLEDGE_BASE]', '[DOCUMENT]');
     *     $operationResponse = $documentsClient->deleteDocument($formattedName);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         // operation succeeded and returns no value
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $documentsClient->deleteDocument($formattedName);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $documentsClient->resumeOperation($operationName, 'deleteDocument');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         // operation succeeded and returns no value
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $documentsClient->close();
     * }
     * ```
     *
     * @param string $name         Required. The name of the document to delete.
     *                             Format: `projects/<Project ID>/locations/<Location
     *                             ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
     * @param array  $optionalArgs {
     *     Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a
     *           {@see Google\ApiCore\RetrySettings} object, or an associative array of retry
     *           settings parameters. See the documentation on
     *           {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function deleteDocument($name, array $optionalArgs = [])
    {
        $request = new DeleteDocumentRequest();
        $requestParamHeaders = [];
        $request->setName($name);
        $requestParamHeaders['name'] = $name;
        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('DeleteDocument', $optionalArgs, $request, $this->getOperationsClient())->wait();
    }

    /**
     * Retrieves the specified document.
     *
     * Sample code:
     * ```
     * $documentsClient = new DocumentsClient();
     * try {
     *     $formattedName = $documentsClient->documentName('[PROJECT]', '[KNOWLEDGE_BASE]', '[DOCUMENT]');
     *     $response = $documentsClient->getDocument($formattedName);
     * } finally {
     *     $documentsClient->close();
     * }
     * ```
     *
     * @param string $name         Required. The name of the document to retrieve.
     *                             Format `projects/<Project ID>/locations/<Location
     *                             ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
     * @param array  $optionalArgs {
     *     Optional.
     *
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a
     *           {@see Google\ApiCore\RetrySettings} object, or an associative array of retry
     *           settings parameters. See the documentation on
     *           {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @return \Google\Cloud\Dialogflow\V2\Document
     *
     * @throws ApiException if the remote call fails
     */
    public function getDocument($name, array $optionalArgs = [])
    {
        $request = new GetDocumentRequest();
        $requestParamHeaders = [];
        $request->setName($name);
        $requestParamHeaders['name'] = $name;
        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startCall('GetDocument', Document::class, $optionalArgs, $request)->wait();
    }

    /**
     * Returns the list of all documents of the knowledge base.
     *
     * Sample code:
     * ```
     * $documentsClient = new DocumentsClient();
     * try {
     *     $formattedParent = $documentsClient->knowledgeBaseName('[PROJECT]', '[KNOWLEDGE_BASE]');
     *     // Iterate over pages of elements
     *     $pagedResponse = $documentsClient->listDocuments($formattedParent);
     *     foreach ($pagedResponse->iteratePages() as $page) {
     *         foreach ($page as $element) {
     *             // doSomethingWith($element);
     *         }
     *     }
     *     // Alternatively:
     *     // Iterate through all elements
     *     $pagedResponse = $documentsClient->listDocuments($formattedParent);
     *     foreach ($pagedResponse->iterateAllElements() as $element) {
     *         // doSomethingWith($element);
     *     }
     * } finally {
     *     $documentsClient->close();
     * }
     * ```
     *
     * @param string $parent       Required. The knowledge base to list all documents for.
     *                             Format: `projects/<Project ID>/locations/<Location
     *                             ID>/knowledgeBases/<Knowledge Base ID>`.
     * @param array  $optionalArgs {
     *     Optional.
     *
     *     @type int $pageSize
     *           The maximum number of resources contained in the underlying API
     *           response. The API may return fewer values in a page, even if
     *           there are additional values to be retrieved.
     *     @type string $pageToken
     *           A page token is used to specify a page of values to be returned.
     *           If no page token is specified (the default), the first page
     *           of values will be returned. Any page token used here must have
     *           been generated by a previous call to the API.
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a
     *           {@see Google\ApiCore\RetrySettings} object, or an associative array of retry
     *           settings parameters. See the documentation on
     *           {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\PagedListResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function listDocuments($parent, array $optionalArgs = [])
    {
        $request = new ListDocumentsRequest();
        $requestParamHeaders = [];
        $request->setParent($parent);
        $requestParamHeaders['parent'] = $parent;
        if (isset($optionalArgs['pageSize'])) {
            $request->setPageSize($optionalArgs['pageSize']);
        }

        if (isset($optionalArgs['pageToken'])) {
            $request->setPageToken($optionalArgs['pageToken']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->getPagedListResponse('ListDocuments', $optionalArgs, ListDocumentsResponse::class, $request);
    }

    /**
     * Reloads the specified document from its specified source, content_uri or
     * content. The previously loaded content of the document will be deleted.
     * Note: Even when the content of the document has not changed, there still
     * may be side effects because of internal implementation changes.
     *
     * Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
     * only use `projects.knowledgeBases.documents`.
     *
     * Operation <response: [Document][google.cloud.dialogflow.v2.Document],
     * metadata: [KnowledgeOperationMetadata][google.cloud.dialogflow.v2.KnowledgeOperationMetadata]>
     *
     * Sample code:
     * ```
     * $documentsClient = new DocumentsClient();
     * try {
     *     $formattedName = $documentsClient->documentName('[PROJECT]', '[KNOWLEDGE_BASE]', '[DOCUMENT]');
     *     $operationResponse = $documentsClient->reloadDocument($formattedName);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         $result = $operationResponse->getResult();
     *     // doSomethingWith($result)
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $documentsClient->reloadDocument($formattedName);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $documentsClient->resumeOperation($operationName, 'reloadDocument');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         $result = $newOperationResponse->getResult();
     *     // doSomethingWith($result)
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $documentsClient->close();
     * }
     * ```
     *
     * @param string $name         Required. The name of the document to reload.
     *                             Format: `projects/<Project ID>/locations/<Location
     *                             ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`
     * @param array  $optionalArgs {
     *     Optional.
     *
     *     @type string $contentUri
     *           Optional. The path of gcs source file for reloading document content. For now,
     *           only gcs uri is supported.
     *
     *           For documents stored in Google Cloud Storage, these URIs must have
     *           the form `gs://<bucket-name>/<object-name>`.
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a
     *           {@see Google\ApiCore\RetrySettings} object, or an associative array of retry
     *           settings parameters. See the documentation on
     *           {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function reloadDocument($name, array $optionalArgs = [])
    {
        $request = new ReloadDocumentRequest();
        $requestParamHeaders = [];
        $request->setName($name);
        $requestParamHeaders['name'] = $name;
        if (isset($optionalArgs['contentUri'])) {
            $request->setContentUri($optionalArgs['contentUri']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('ReloadDocument', $optionalArgs, $request, $this->getOperationsClient())->wait();
    }

    /**
     * Updates the specified document.
     *
     * Operation <response: [Document][google.cloud.dialogflow.v2.Document],
     * metadata: [KnowledgeOperationMetadata][google.cloud.dialogflow.v2.KnowledgeOperationMetadata]>
     *
     * Sample code:
     * ```
     * $documentsClient = new DocumentsClient();
     * try {
     *     $document = new Document();
     *     $operationResponse = $documentsClient->updateDocument($document);
     *     $operationResponse->pollUntilComplete();
     *     if ($operationResponse->operationSucceeded()) {
     *         $result = $operationResponse->getResult();
     *     // doSomethingWith($result)
     *     } else {
     *         $error = $operationResponse->getError();
     *         // handleError($error)
     *     }
     *     // Alternatively:
     *     // start the operation, keep the operation name, and resume later
     *     $operationResponse = $documentsClient->updateDocument($document);
     *     $operationName = $operationResponse->getName();
     *     // ... do other work
     *     $newOperationResponse = $documentsClient->resumeOperation($operationName, 'updateDocument');
     *     while (!$newOperationResponse->isDone()) {
     *         // ... do other work
     *         $newOperationResponse->reload();
     *     }
     *     if ($newOperationResponse->operationSucceeded()) {
     *         $result = $newOperationResponse->getResult();
     *     // doSomethingWith($result)
     *     } else {
     *         $error = $newOperationResponse->getError();
     *         // handleError($error)
     *     }
     * } finally {
     *     $documentsClient->close();
     * }
     * ```
     *
     * @param Document $document     Required. The document to update.
     * @param array    $optionalArgs {
     *     Optional.
     *
     *     @type FieldMask $updateMask
     *           Optional. Not specified means `update all`.
     *           Currently, only `display_name` can be updated, an InvalidArgument will be
     *           returned for attempting to update other fields.
     *     @type RetrySettings|array $retrySettings
     *           Retry settings to use for this call. Can be a
     *           {@see Google\ApiCore\RetrySettings} object, or an associative array of retry
     *           settings parameters. See the documentation on
     *           {@see Google\ApiCore\RetrySettings} for example usage.
     * }
     *
     * @return \Google\ApiCore\OperationResponse
     *
     * @throws ApiException if the remote call fails
     */
    public function updateDocument($document, array $optionalArgs = [])
    {
        $request = new UpdateDocumentRequest();
        $requestParamHeaders = [];
        $request->setDocument($document);
        $requestParamHeaders['document.name'] = $document->getName();
        if (isset($optionalArgs['updateMask'])) {
            $request->setUpdateMask($optionalArgs['updateMask']);
        }

        $requestParams = new RequestParamsHeaderDescriptor($requestParamHeaders);
        $optionalArgs['headers'] = isset($optionalArgs['headers']) ? array_merge($requestParams->getHeader(), $optionalArgs['headers']) : $requestParams->getHeader();
        return $this->startOperationsCall('UpdateDocument', $optionalArgs, $request, $this->getOperationsClient())->wait();
    }
}
