<?php
declare(strict_types=1);


/**
 * Nextcloud - Social Support
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Maxence Lange <maxence@artificial-owl.com>
 * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace OCA\Social\Model\ActivityPub;


use daita\MySmallPhpTools\Traits\TArrayTools;
use JsonSerializable;
use OCA\Social\Exceptions\ActivityCantBeVerifiedException;
use OCA\Social\Model\InstancePath;
use OCA\Social\Service\ICoreService;


abstract class ACore implements JsonSerializable {


	use TArrayTools;


	const CONTEXT_ACTIVITYSTREAMS = 'https://www.w3.org/ns/activitystreams';
	const CONTEXT_SECURITY = 'https://w3id.org/security/v1';


	/** @var string */
	private $root = '';

//	/** @var bool */
//	private $isTopLevel = false;

	/** @var array */
	private $meta = [];

	/** @var string */
	private $address = '';

	/** @var string */
	private $id = '';

	/** @var string */
	private $type = '';

	/** @var string */
	private $url = '';

	/** @var string */
	private $summary = '';

	/** @var InstancePath[] */
	private $instancePaths = [];

	/** @var string */
	private $to = '';

	/** @var array */
	private $toArray = [];

	/** @var array */
	private $cc = [];

	/** @var array */
	private $bcc = [];

	/** @var string */
	private $published = '';

	/** @var array */
	private $tags = [];

	/** @var array */
	private $entries = [];

	/** @var Person */
	private $actor = null;

	/** @var string */
	private $actorId = '';

	/** @var ACore */
	private $object = null;

	/** @var string */
	private $objectId = '';

	/** @var ICoreService */
	private $saveAs;

	/** @var bool */
	private $completeDetails = false;

	/** @var string */
	private $source = '';

	/** @var null ACore */
	private $parent = null;

	/**
	 * Core constructor.
	 *
	 * @param ACore $parent
	 */
	public function __construct($parent = null) {
//		$this->isTopLevel = $isTopLevel;

		if ($parent instanceof ACore) {
			$this->setParent($parent);
		}
	}


	/**
	 * @return string
	 */
	public function getId(): string {
		return $this->id;
	}

	/**
	 * @param string $id
	 *
	 * @return ACore
	 */
	public function setId(string $id): ACore {
		$this->id = $id;

		return $this;
	}

	public function generateUniqueId(string $base) {
		$uuid = sprintf(
			'%04x%04x-%04x-%04x-%04x-%04x%04x%04x', mt_rand(0, 0xffff), mt_rand(0, 0xffff),
			mt_rand(0, 0xffff), mt_rand(0, 0xfff) | 0x4000, mt_rand(0, 0x3fff) | 0x8000,
			mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
		);

		$this->setId($base . '/' . $uuid);
	}

	/**
	 * @return string
	 */
	public function getType(): string {
		return $this->type;
	}

	/**
	 * @param string $type
	 *
	 * @return ACore
	 */
	public function setType(string $type): ACore {
		if ($type !== '') {
			$this->type = $type;
		}

		return $this;
	}


	/**
	 * @param string $url
	 *
	 * @throws ActivityCantBeVerifiedException
	 */
	public function verify(string $url) {
		$url1 = parse_url($this->getId());
		$url2 = parse_url($url);

		if ($this->get('host', $url1, '1') !== $this->get('host', $url2, '2')) {
			throw new ActivityCantBeVerifiedException('activity cannot be verified');
		}

		if ($this->get('scheme', $url1, '1') !== $this->get('scheme', $url2, '2')) {
			throw new ActivityCantBeVerifiedException('activity cannot be verified');
		}

		if ($this->getInt('port', $url1, 1) !== $this->getInt('port', $url2, 1)) {
			throw new ActivityCantBeVerifiedException('activity cannot be verified');
		}
	}


	/**
	 * @return string
	 */
	public function getUrl(): string {
		return $this->url;
	}

	/**
	 * @param string $url
	 *
	 * @return ACore
	 */
	public function setUrl(string $url): ACore {
		$this->url = $url;

		return $this;
	}


	/**
	 * @param InstancePath $instancePath
	 *
	 * @return ACore
	 */
	public function addInstancePath(InstancePath $instancePath): ACore {
		$this->instancePaths[] = $instancePath;

		return $this;
	}


	/**
	 * @param InstancePath[] $path
	 *
	 * @return ACore
	 */
	public function addInstancePaths(array $path): ACore {
		$this->instancePaths = array_merge($this->instancePaths, $path);

		return $this;
	}

	/**
	 * @return InstancePath[]
	 */
	public function getInstancePaths(): array {
		return $this->instancePaths;
	}

	/**
	 * @param InstancePath[] $instancePaths
	 *
	 * @return ACore
	 */
	public function setInstancePaths(array $instancePaths): ACore {
		$this->instancePaths = $instancePaths;

		return $this;
	}


	/**
	 * @return string
	 */
	public function getSummary(): string {
		return $this->summary;
	}

	/**
	 * @param string $summary
	 *
	 * @return ACore
	 */
	public function setSummary(string $summary): ACore {
		$this->summary = $summary;

		return $this;
	}


	/**
	 * @return Person
	 */
	public function getActor(): Person {
		return $this->actor;
	}

	/**
	 * @param Person $actor
	 *
	 * @return ACore
	 */
	public function setActor(Person $actor): ACore {
		$this->actor = $actor;

		return $this;
	}

	/**
	 * @return bool
	 */
	public function gotActor(): bool {
		if ($this->actor === null) {
			return false;
		}

		return true;
	}


	/**
	 * @param string $actorId
	 *
	 * @return ACore
	 */
	public function setActorId(string $actorId): ACore {
		$this->actorId = $actorId;

		return $this;
	}

	/**
	 * @return string
	 */
	public function getActorId(): string {
		return $this->actorId;
	}


	/**
	 * @return string
	 */
	public function getUrlRoot(): string {
		return $this->root;
	}

	/**
	 * @param string $path
	 *
	 * @return ACore
	 */
	public function setUrlRoot(string $path): ACore {
		$this->root = $path;

		return $this;
	}


	/**
	 * @return string
	 */
	public function getAddress(): string {
		return $this->address;
	}

	/**
	 * @param string $address
	 *
	 * @return ACore
	 */
	public function setAddress(string $address) {
		$this->address = $address;

		return $this;
	}


	/**
	 * @return string
	 */
	public function getTo(): string {
		return $this->to;
	}

	/**
	 * @param string $to
	 *
	 * @return ACore
	 */
	public function setTo(string $to): ACore {
		$this->to = $to;

		return $this;
	}

	/**
	 * @return array
	 */
	public function getToArray(): array {
		return $this->toArray;
	}

	/**
	 * @param string $to
	 *
	 * @return ACore
	 */
	public function addToArray(string $to): ACore {
		$this->toArray[] = $to;

		return $this;
	}

	/**
	 * @param array $toArray
	 *
	 * @return ACore
	 */
	public function setToArray(array $toArray): ACore {
		$this->toArray = $toArray;

		return $this;
	}


	public function addCc(string $cc): Acore {
		$this->cc[] = $cc;

		return $this;
	}

	/**
	 * @return array
	 */
	public function getCcArray(): array {
		return $this->cc;
	}

	/**
	 * @param array $cc
	 *
	 * @return ACore
	 */
	public function setCcArray(array $cc): ACore {
		$this->cc = $cc;

		return $this;
	}


	/**
	 * @return array
	 */
	public function getBccArray(): array {
		return $this->bcc;
	}

	/**
	 * @param array $bcc
	 *
	 * @return ACore
	 */
	public function setBccArray(array $bcc): ACore {
		$this->bcc = $bcc;

		return $this;
	}


	/**
	 * @param string $published
	 *
	 * @return ACore
	 */
	public function setPublished(string $published): ACore {
		$this->published = $published;

		return $this;
	}

	/**
	 * @return string
	 */
	public function getPublished(): string {
		return $this->published;
	}


	/**
	 * @param array $tag
	 *
	 * @return ACore
	 */
	public function addTag(array $tag): ACore {
		$this->tags[] = $tag;

		return $this;
	}

	/**
	 * @return array
	 */
	public function getTags(): array {
		return $this->tags;
	}

	/**
	 * @param array $tag
	 *
	 * @return ACore
	 */
	public function setTags(array $tag): ACore {
		$this->tags = $tag;

		return $this;
	}


	/**
	 * @return bool
	 */
	public function gotObject(): bool {
		if ($this->object === null) {
			return false;
		}

		return true;
	}

	/**
	 * @return ACore
	 */
	public function getObject(): ACore {
		return $this->object;
	}

	/**
	 * @param ACore $object
	 *
	 * @return ACore
	 */
	public function setObject(ACore $object): ACore {
		$this->object = $object;

		return $this;
	}


	/**
	 * @return string
	 */
	public function getObjectId(): string {
		return $this->objectId;
	}

	/**
	 * @param string $objectId
	 *
	 * @return ACore
	 */
	public function setObjectId(string $objectId): ACore {
		$this->objectId = $objectId;

		return $this;
	}


	/**
	 * @param ACore $parent
	 *
	 * @return ACore
	 */
	public function setParent(ACore $parent): ACore {
		$this->parent = $parent;

		return $this;
	}

	/**
	 * @return ACore
	 */
	public function getParent(): ACore {
		return $this->parent;
	}

	/**
	 * @return bool
	 */
	public function isRoot(): bool {
		return ($this->parent === null);
	}

	/**
	 * @param array $chain
	 *
	 * @return ACore
	 */
	public function getRoot(array &$chain = []): ACore {
		$chain[] = $this;
		if ($this->isRoot()) {
			return $this;
		}


		return $this->getParent()
					->getRoot($chain);
	}


	/**
	 * @param array $arr
	 *
	 * @return ACore
	 */
	public function setEntries(array $arr): ACore {
		$this->entries = $arr;

		return $this;
	}

	/**
	 * @return array
	 */
	public function getEntries(): array {
		return $this->entries;
	}

	/**
	 * @param string $k
	 * @param string $v
	 *
	 * @return ACore
	 */
	public function addEntry(string $k, string $v): ACore {
		if ($v === '') {
//			unset($this->entries[$k]);

			return $this;
		}

		$this->entries[$k] = $v;

		return $this;
	}

	/**
	 * @param string $k
	 * @param int $v
	 *
	 * @return ACore
	 */
	public function addEntryInt(string $k, int $v): ACore {
		if ($v === 0) {
			return $this;
		}

		$this->entries[$k] = $v;

		return $this;
	}

	/**
	 * @param string $k
	 * @param array $v
	 *
	 * @return ACore
	 */
	public function addEntryArray(string $k, array $v): ACore {
		if ($v === []) {
//			unset($this->entries[$k]);

			return $this;
		}

		$this->entries[$k] = $v;

		return $this;
	}


	/**
	 * @param string $k
	 * @param ACore $v
	 *
	 * @return ACore
	 */
	public function addEntryItem(string $k, ACore $v): ACore {
		if ($v === null) {
//			unset($this->entries[$k]);

			return $this;
		}

		$this->entries[$k] = $v;

		return $this;
	}


	/**
	 * @param ICoreService $class
	 */
	public function saveAs(ICoreService $class) {
		$this->saveAs = $class;
	}

	/**
	 * @return ICoreService
	 */
	public function savingAs() {
		return $this->saveAs;
	}


	/**
	 * @return bool
	 */
	public function isCompleteDetails(): bool {
		return $this->completeDetails;
	}

	/**
	 * @param bool $completeDetails
	 *
	 * @return ACore
	 */
	public function setCompleteDetails(bool $completeDetails): ACore {
		$this->completeDetails = $completeDetails;

		return $this;
	}


	/**
	 * @return string
	 */
	public function getSource(): string {
		return $this->source;
	}

	/**
	 * @param string $source
	 *
	 * @return ACore
	 */
	public function setSource(string $source): ACore {
		$this->source = $source;

		return $this;
	}


	/**
	 * @param array $data
	 */
	public function import(array $data) {
		$this->setId($this->get('id', $data, ''));
		$this->setType($this->get('type', $data, ''));
		$this->setUrl($this->get('url', $data, ''));
		$this->setSummary($this->get('summary', $data, ''));
		$this->setToArray($this->getArray('to', $data, []));
		$this->setCcArray($this->getArray('cc', $data, []));
		$this->setPublished($this->get('published', $data, ''));
		$this->setActorId($this->get('actor', $data, ''));
		$this->setObjectId($this->get('object', $data, ''));
		$this->setSource($this->get('source', $data, ''));
	}


	/**
	 * @return array
	 */
	public function jsonSerialize(): array {
		if ($this->isRoot()) {
			$this->addEntryArray(
				'@context', [
							  self::CONTEXT_ACTIVITYSTREAMS,
							  self::CONTEXT_SECURITY
						  ]
			);
		}

		$this->addEntry('id', $this->getId());
		$this->addEntry('type', $this->getType());
		$this->addEntry('url', $this->getId());

		$this->addEntry('to', $this->getTo());
		$this->addEntryArray('to', $this->getToArray());
		$this->addEntryArray('cc', $this->getCcArray());

		if ($this->gotActor()) {
			$this->addEntry(
				'actor', $this->getActor()
							  ->getId()
			);
			if ($this->isCompleteDetails()) {
				$this->addEntryItem('actor_info', $this->getActor());
			}
		} else {
			$this->addEntry('actor', $this->getActorId());
		}

		$this->addEntry('summary', $this->getSummary());
		$this->addEntry('published', $this->getPublished());
		$this->addEntryArray('tag', $this->getTags());

//		$arr = $this->getEntries();
		if ($this->gotObject()) {
			$this->addEntryItem('object', $this->getObject());
		} else {
			$this->addEntry('object', $this->getObjectId());
		}

		if ($this->isCompleteDetails()) {
			$this->addEntry('source', $this->getSource());
		}

		return $this->getEntries();
	}

}