<?php

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

namespace CloudObjects\SDK;

use Exception;
use ML\IRI\IRI;
use ML\JsonLD\Node;

/**
 * Static facade for ObjectRetriever. Call setObjectRetriever() once to
 * initialize; all subsequent static calls are forwarded to that instance.
 */
class ObjectRetrieverFacade {

	private static ?ObjectRetriever $instance = null;

	public static function setObjectRetriever(ObjectRetriever $retriever) : void {
		self::$instance = $retriever;
	}

	private static function getInstance() : ObjectRetriever {
		if (self::$instance === null)
			throw new Exception('ObjectRetrieverFacade has not been initialized. Call setObjectRetriever() first.');

		return self::$instance;
	}

	public static function setDefaultReader(NodeReader $reader) : ObjectRetriever {
		return self::getInstance()->setDefaultReader($reader);
	}

	public static function getDefaultReader() : NodeReader {
		return self::getInstance()->getDefaultReader();
	}

	public static function getClient() {
		return self::getInstance()->getClient();
	}

	public static function getCloudObject(IRI $coid) : ?CloudObject {
		return self::getInstance()->getCloudObject($coid);
	}

	public static function getObjectNode(IRI $coid) : ?Node {
		return self::getInstance()->getObjectNode($coid);
	}

	public static function fetchObjectsInNamespaceWithType(IRI $namespaceCoid, $type) : array {
		return self::getInstance()->fetchObjectsInNamespaceWithType($namespaceCoid, $type);
	}

	public static function fetchAllObjectsInNamespace(IRI $namespaceCoid) : array {
		return self::getInstance()->fetchAllObjectsInNamespace($namespaceCoid);
	}

	public static function getCOIDListForNamespace(IRI $namespaceCoid) : array {
		return self::getInstance()->getCOIDListForNamespace($namespaceCoid);
	}

	public static function getCOIDListForNamespaceWithType(IRI $namespaceCoid, $type) : array {
		return self::getInstance()->getCOIDListForNamespaceWithType($namespaceCoid, $type);
	}

	public static function getAttachment(IRI $coid, $filename) {
		return self::getInstance()->getAttachment($coid, $filename);
	}

	public static function getAuthenticatingNamespaceObjectNode() : ?Node {
		return self::getInstance()->getAuthenticatingNamespaceObjectNode();
	}

	public static function getAuthenticatingNamespaceCloudObject() : ?CloudObject {
		return self::getInstance()->getAuthenticatingNamespaceCloudObject();
	}

}