=> false ],
							'nosnippet'       => [ 'type' => 'boolean', 'default' => false ],
							'noodp'           => [ 'type' => 'boolean', 'default' => false ],
							'maxSnippet'      => [ 'type' => 'number', 'default' => -1 ],
							'maxVideoPreview' => [ 'type' => 'number', 'default' => -1 ],
							'maxImagePreview' => [ 'type' => 'string', 'default' => 'large' ]
						],
						'showDateInGooglePreview'   => [ 'type' => 'boolean', 'default' => true ],
						'showPostThumbnailInSearch' => [ 'type' => 'boolean', 'default' => true ],
						'showMetaBox'               => [ 'type' => 'boolean', 'default' => true ],
						'keywords'                  => [ 'type' => 'string', 'localized' => true ]
					]
				]
			]
		],
		'searchStatistics' => [
			'postTypes' => [
				'all'      => [ 'type' => 'boolean', 'default' => true ],
				'included' => [ 'type' => 'array', 'default' => [ 'post', 'page' ] ],
			]
		],
		'tools'            => [
			'robots'       => [
				'enable'         => [ 'type' => 'boolean', 'default' => false ],
				'rules'          => [ 'type' => 'array', 'default' => [] ],
				'robotsDetected' => [ 'type' => 'boolean', 'default' => true ],
			],
			'importExport' => [
				'backup' => [
					'lastTime' => [ 'type' => 'string' ],
					'data'     => [ 'type' => 'string' ],
				]
			]
		],
		'deprecated'       => [
			'breadcrumbs'      => [
				'enable' => [ 'type' => 'boolean', 'default' => true ]
			],
			'searchAppearance' => [
				'global'   => [
					'descriptionFormat' => [ 'type' => 'string' ],
					'schema'            => [
						'enableSchemaMarkup' => [ 'type' => 'boolean', 'default' => true ]
					]
				],
				'advanced' => [
					'autogenerateDescriptions'               => [ 'type' => 'boolean', 'default' => true ],
					'runShortcodesInDescription'             => [ 'type' => 'boolean', 'default' => true ], // TODO: Remove this in a future update.
					'useContentForAutogeneratedDescriptions' => [ 'type' => 'boolean', 'default' => false ],
					'excludePosts'                           => [ 'type' => 'array', 'default' => [] ],
					'excludeTerms'                           => [ 'type' => 'array', 'default' => [] ],
					'noPaginationForCanonical'               => [ 'type' => 'boolean', 'default' => true ]
				]
			],
			'sitemap'          => [
				'general' => [
					'advancedSettings' => [
						'dynamic' => [ 'type' => 'boolean', 'default' => true ]
					]
				]
			],
			'tools'            => [
				'blocker' => [
					'blockBots'    => [ 'type' => 'boolean' ],
					'blockReferer' => [ 'type' => 'boolean' ],
					'track'        => [ 'type' => 'boolean' ],
					'custom'       => [
						'enable'  => [ 'type' => 'boolean' ],
						'bots'    => [ 'type' => 'html', 'default' => '' ],
						'referer' => [ 'type' => 'html', 'default' => '' ]
					]
				]
			]
		],
		'writingAssistant' => [
			'postTypes' => [
				'all'      => [ 'type' => 'boolean', 'default' => true ],
				'included' => [ 'type' => 'array', 'default' => [ 'post', 'page' ] ],
			]
		]
		// phpcs:enable WordPress.Arrays.ArrayDeclarationSpacing.AssociativeArrayFound
	];

	/**
	 * The Construct method.
	 *
	 * @since 4.0.0
	 *
	 * @param string $optionsName An array of options.
	 */
	public function __construct( $optionsName = 'aioseo_options' ) {
		$this->optionsName = $optionsName;

		$this->init();

		add_action( 'shutdown', [ $this, 'save' ] );
	}

	/**
	 * Initializes the options.
	 *
	 * @since 4.0.0
	 *
	 * @return void
	 */
	public function init() {
		$this->setInitialDefaults();
		$this->translateDefaults();

		$this->setDbOptions();

		add_action( 'wp_loaded', [ $this, 'maybeFlushRewriteRules' ] );
	}

	/**
	 * Sets the DB options to the class after merging in new defaults and dropping unknown values.
	 *
	 * @since 4.0.14
	 *
	 * @return void
	 */
	public function setDbOptions() {
		// Refactor options.
		$this->defaultsMerged = array_replace_recursive( $this->defaults, $this->defaultsMerged );

		$dbOptions = $this->getDbOptions( $this->optionsName );

		$options = array_replace_recursive(
			$this->defaultsMerged,
			$this->addValueToValuesArray( $this->defaultsMerged, $dbOptions )
		);

		aioseo()->core->optionsCache->setOptions( $this->optionsName, apply_filters( 'aioseo_get_options', $options ) );

		// Get the localized options.
		$dbOptionsLocalized = get_option( $this->optionsName . '_localized' );
		if ( empty( $dbOptionsLocalized ) ) {
			$dbOptionsLocalized = [];
		}
		$this->localized = $dbOptionsLocalized;
	}

	/**
	 * Sets the initial defaults that can't be defined in the property because of PHP 5.4.
	 *
	 * @since 4.1.4
	 *
	 * @return void
	 */
	protected function setInitialDefaults() {
		static $hasInitialized = false;
		if ( $hasInitialized ) {
			return;
		}

		$hasInitialized = true;

		$this->defaults['deprecated']['tools']['blocker']['custom']['bots']['default']         = implode( "\n", aioseo()->badBotBlocker->getBotList() );
		$this->defaults['deprecated']['tools']['blocker']['custom']['referer']['default']      = implode( "\n", aioseo()->badBotBlocker->getRefererList() );

		$this->defaults['searchAppearance']['global']['schema']['organizationLogo']['default'] = aioseo()->helpers->getSiteLogoUrl() ? aioseo()->helpers->getSiteLogoUrl() : '';

		$this->defaults['advanced']['emailSummary']['recipients']['default'] = [
			[
				'email'     => get_bloginfo( 'admin_email' ),
				'frequency' => 'monthly',
			]
		];
	}

	/**
	 * For our defaults array, some options need to be translated, so we do that here.
	 *
	 * @since 4.0.0
	 *
	 * @return void
	 */
	public function translateDefaults() {
		static $hasInitialized = false;
		if ( $hasInitialized ) {
			return;
		}

		$hasInitialized = true;

		$default = sprintf( '{"label":"%1$s","value":"default"}', __( 'default', 'all-in-one-seo-pack' ) );
		$this->defaults['sitemap']['general']['advancedSettings']['priority']['homePage']['priority']['default']    = $default;
		$this->defaults['sitemap']['general']['advancedSettings']['priority']['homePage']['frequency']['default']   = $default;
		$this->defaults['sitemap']['general']['advancedSettings']['priority']['postTypes']['priority']['default']   = $default;
		$this->defaults['sitemap']['general']['advancedSettings']['priority']['postTypes']['frequency']['default']  = $default;
		$this->defaults['sitemap']['general']['advancedSettings']['priority']['taxonomies']['priority']['default']  = $default;
		$this->defaults['sitemap']['general']['advancedSettings']['priority']['taxonomies']['frequency']['default'] = $default;

		$this->defaults['breadcrumbs']['homepageLabel']['default']      = __( 'Home', 'all-in-one-seo-pack' );
		$this->defaults['breadcrumbs']['archiveFormat']['default']      = sprintf( '%1$s #breadcrumb_archive_post_type_name', __( 'Archives for', 'all-in-one-seo-pack' ) );
		$this->defaults['breadcrumbs']['searchResultFormat']['default'] = sprintf( '%1$s \'#breadcrumb_search_string\'', __( 'Search Results for', 'all-in-one-seo-pack' ) );
		$this->defaults['breadcrumbs']['errorFormat404']['default']     = __( '404 - Page Not Found', 'all-in-one-seo-pack' );
	}

	/**
	 * Sanitizes, then saves the options to the database.
	 *
	 * @since 4.0.0
	 *
	 * @param  array $options An array of options to sanitize, then save.
	 * @return void
	 */
	public function sanitizeAndSave( $options ) {
		$sitemapOptions                  = ! empty( $options['sitemap'] ) ? $options['sitemap'] : null;
		$oldSitemapOptions               = aioseo()->options->sitemap->all();
		$generalSitemapOptions           = ! empty( $options['sitemap']['general'] ) ? $options['sitemap']['general'] : null;
		$oldGeneralSitemapOptions        = aioseo()->options->sitemap->general->all();
		$deprecatedGeneralSitemapOptions = ! empty( $options['deprecated']['sitemap']['general'] )
				? $options['deprecated']['sitemap']['general']
				: null;
		$oldDeprecatedGeneralSitemapOptions = aioseo()->options->deprecated->sitemap->general->all();
		$oldPhoneOption                     = aioseo()->options->searchAppearance->global->schema->phone;
		$phoneNumberOptions                 = isset( $options['searchAppearance']['global']['schema']['phone'] )
				? $options['searchAppearance']['global']['schema']['phone']
				: null;
		$oldHtmlSitemapUrl = aioseo()->options->sitemap->html->pageUrl;
		$logsRetention     = isset( $options['searchAppearance']['advanced']['blockArgs']['logsRetention'] ) ? $options['searchAppearance']['advanced']['blockArgs']['logsRetention'] : null;
		$oldLogsRetention  = aioseo()->options->searchAppearance->advanced->blockArgs->logsRetention;

		// Remove category base.
		$removeCategoryBase    = isset( $options['searchAppearance']['advanced']['removeCategoryBase'] ) ? $options['searchAppearance']['advanced']['removeCategoryBase'] : null;
		$removeCategoryBaseOld = aioseo()->options->searchAppearance->advanced->removeCategoryBase;

		$options = $this->maybeRemoveUnfilteredHtmlFields( $options );

		$this->init();

		if ( ! is_array( $options ) ) {
			return;
		}

		$this->sanitizeEmailSummary( $options );

		// First, recursively replace the new options into the cached state.
		// It's important we use the helper method since we want to replace populated arrays with empty ones if needed (when a setting was cleared out).
		$cachedOptions = aioseo()->core->optionsCache->getOptions( $this->optionsName );
		$dbOptions     = aioseo()->helpers->arrayReplaceRecursive(
			$cachedOptions,
			$this->addValueToValuesArray( $cachedOptions, $options, [], true )
		);

		// Now, we must also intersect both arrays to delete any individual keys that were unset.
		// We must do this because, while arrayReplaceRecursive will update the values for keys or empty them out,
		// it will keys that aren't present in the replacement array unaffected in the target array.
		$dbOptions = aioseo()->helpers->arrayIntersectRecursive(
			$dbOptions,
			$this->addValueToValuesArray( $cachedOptions, $options, [], true ),
			'value'
		);

		if ( isset( $options['social']['profiles']['additionalUrls'] ) ) {
			$dbOptions['social']['profiles']['additionalUrls'] = preg_replace( '/\h/', "\n", $options['social']['profiles']['additionalUrls'] );
		}

		$newOptions = ! empty( $options['sitemap']['html'] ) ? $options['sitemap']['html'] : null;
		if ( ! empty( $newOptions ) && aioseo()->options->sitemap->html->enable ) {
			$newOptions = ! empty( $options['sitemap']['html'] ) ? $options['sitemap']['html'] : null;

			$pageUrl = wp_parse_url( $newOptions['pageUrl'] );
			$path    = ! empty( $pageUrl['path'] ) ? untrailingslashit( $pageUrl['path'] ) : '';
			if ( $path ) {
				$existingPage = get_page_by_path( $path, OBJECT );
				if ( is_object( $existingPage ) ) {
					// If the page exists, don't override the previous URL.
					$options['sitemap']['html']['pageUrl'] = $oldHtmlSitemapUrl;
				}
			}
		}

		// Update the cache state.
		aioseo()->core->optionsCache->setOptions( $this->optionsName, $dbOptions );

		// Update localized options.
		update_option( $this->optionsName . '_localized', $this->localized );

		// Finally, save the new values to the DB.
		$this->save( true );

		// If phone settings have changed, let's see if we need to dump the phone number notice.
		if (
			$phoneNumberOptions &&
			$phoneNumberOptions !== $oldPhoneOption
		) {
			$notification = Models\Notification::getNotificationByName( 'v3-migration-schema-number' );
			if ( $notification->exists() ) {
				Models\Notification::deleteNotificationByName( 'v3-migration-schema-number' );
			}
		}

		// If sitemap settings were changed, static files need to be regenerated.
		if (
			! empty( $deprecatedGeneralSitemapOptions ) &&
			! empty( $generalSitemapOptions )
		) {
			if (
				(
					aioseo()->helpers->arraysDifferent( $oldGeneralSitemapOptions, $generalSitemapOptions ) ||
					aioseo()->helpers->arraysDifferent( $oldDeprecatedGeneralSitemapOptions, $deprecatedGeneralSitemapOptions )
				) &&
				$generalSitemapOptions['advancedSettings']['enable'] &&
				! $deprecatedGeneralSitemapOptions['advancedSettings']['dynamic']
			) {
				aioseo()->sitemap->scheduleRegeneration();
			}
		}

		// Add or remove schedule for clearing crawl cleanup logs.
		if ( ! empty( $logsRetention ) && $oldLogsRetention !== $logsRetention ) {
			aioseo()->crawlCleanup->scheduleClearingLogs();
		}

		if ( ! empty( $sitemapOptions ) ) {
			aioseo()->searchStatistics->sitemap->maybeSync( $oldSitemapOptions, $sitemapOptions );
		}

		if (
			null !== $removeCategoryBase &&
			$removeCategoryBase !== $removeCategoryBaseOld
		) {
			aioseo()->options->flushRewriteRules();
		}

		// This is required in order for the Pro options to be refreshed before they save data again.
		$this->refresh();
	}

	/**
	 * Sanitizes the `emailSummary` option.
	 *
	 * @since 4.7.2
	 *
	 * @param  array $options All options, passed by reference.
	 * @return void
	 */
	private function sanitizeEmailSummary( &$options ) {
		foreach ( ( $options['advanced']['emailSummary']['recipients'] ?? [] ) as $k => &$recipient ) {
			$recipient['email'] = is_email( $recipient['email'] );

			// Remove empty emails.
			if ( empty( $recipient['email'] ) ) {
				unset( $options['advanced']['emailSummary']['recipients'][ $k ] );

				continue;
			}

			// Remove duplicate emails with the same frequency.
			foreach ( $options['advanced']['emailSummary']['recipients'] as $k2 => $recipient2 ) {
				if (
					$k !== $k2 &&
					$recipient['email'] === $recipient2['email'] &&
					$recipient['frequency'] === $recipient2['frequency']
				) {
					unset( $options['advanced']['emailSummary']['recipients'][ $k ] );

					break;
				}
			}
		}
	}

	/**
	 * If the user does not have access to unfiltered HTML, we need to remove them from saving.
	 *
	 * @since 4.0.0
	 *
	 * @param  array $options An array of options.
	 * @return array          An array of options.
	 */
	private function maybeRemoveUnfilteredHtmlFields( $options ) {
		if ( current_user_can( 'unfiltered_html' ) ) {
			return $options;
		}

		if (
			! empty( $options['webmasterTools'] ) &&
			isset( $options['webmasterTools']['miscellaneousVerification'] )
		) {
			unset( $options['webmasterTools']['miscellaneousVerification'] );
		}

		if (
			! empty( $options['rssContent'] ) &&
			isset( $options['rssContent']['before'] )
		) {
			unset( $options['rssContent']['before'] );
		}

		if (
			! empty( $options['rssContent'] ) &&
			isset( $options['rssContent']['after'] )
		) {
			unset( $options['rssContent']['after'] );
		}

		return $options;
	}

	/**
	 * Indicate we need to flush rewrite rules on next load.
	 *
	 * @since 4.0.17
	 *
	 * @return void
	 */
	public function flushRewriteRules() {
		update_option( 'aioseo_flush_rewrite_rules_flag', true );
	}

	/**
	 * Flush rewrite rules if needed.
	 *
	 * @since 4.0.17
	 *
	 * @return void
	 */
	public function maybeFlushRewriteRules() {
		if ( get_option( 'aioseo_flush_rewrite_rules_flag' ) ) {
			flush_rewrite_rules();
			delete_option( 'aioseo_flush_rewrite_rules_flag' );
		}
	}
}