page_url( $this->plugin_page_setup['parent_slug'], false );

		if ( empty( $url ) ) {
			$url = self_admin_url( $this->plugin_page_setup['parent_slug'] );
		}

		return add_query_arg( $parameters, $url );
	}

	/**
	 * Redirect from the old default OCDI settings page URL to the new one.
	 */
	public function redirect_from_old_default_admin_page() {
		global $pagenow;

		if ( $pagenow == 'themes.php' && isset( $_GET['page'] ) && $_GET['page'] == 'pt-one-click-demo-import' ) {
			wp_safe_redirect( $this->get_plugin_settings_url() );
			exit;
		}
	}

	/**
	 * Add imported terms.
	 *
	 * Mainly it's needed for saving all imported terms and trigger terms count updates.
	 * WP core term defer counting is not working, since import split to chunks and we are losing `$_deffered` array
	 * items between ajax calls.
	 */
	public function add_imported_terms( $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids ){

		if ( ! isset( $this->imported_terms[ $taxonomy ] ) ) {
			$this->imported_terms[ $taxonomy ] = array();
		}

		$this->imported_terms[ $taxonomy ] = array_unique( array_merge( $this->imported_terms[ $taxonomy ], $tt_ids ) );
	}

	/**
	 * Returns an empty array if current attachment to be imported is in the failed imports list.
	 *
	 * This will skip the current attachment import.
	 *
	 * @since 3.2.0
	 *
	 * @param array $data Post data to be imported.
	 *
	 * @return array
	 */
	public function skip_failed_attachment_import( $data ) {
		// Check if failed import.
		if (
			! empty( $data ) &&
			! empty( $data['post_type'] ) &&
			$data['post_type'] === 'attachment' &&
			! empty( $data['attachment_url'] )
		) {
			// Get the previously failed imports.
			$failed_media_imports = Helpers::get_failed_attachment_imports();

			if ( ! empty( $failed_media_imports ) && in_array( $data['attachment_url'], $failed_media_imports, true ) ) {
				// If the current attachment URL is in the failed imports, then skip it.
				return [];
			}
		}

		return $data;
	}

	/**
	 * Save the failed attachment import.
	 *
	 * @since 3.2.0
	 *
	 * @param WP_Error $post_id Error object.
	 * @param array    $data Raw data imported for the post.
	 * @param array    $meta Raw meta data, already processed.
	 * @param array    $comments Raw comment data, already processed.
	 * @param array    $terms Raw term data, already processed.
	 */
	public function handle_failed_attachment_import( $post_id, $data, $meta, $comments, $terms ) {

		if ( empty( $data ) || empty( $data['post_type'] ) || $data['post_type'] !== 'attachment' ) {
			return;
		}

		Helpers::set_failed_attachment_import( $data['attachment_url'] );
	}

	/**
	 * Save the information needed to process the navigation block.
	 *
	 * @since 3.2.0
	 *
	 * @param int   $post_id     The new post ID.
	 * @param int   $original_id The original post ID.
	 * @param array $postdata    The post data used to insert the post.
	 * @param array $data        Post data from the WXR file.
	 */
	public function save_wp_navigation_import_mapping( $post_id, $original_id, $postdata, $data ) {

		if ( empty( $postdata['post_content'] ) ) {
			return;
		}

		if ( $postdata['post_type'] !== 'wp_navigation' ) {

			/*
			 * Save the post ID that has navigation block in transient.
			 */
			if ( strpos( $postdata['post_content'], '<!-- wp:navigation' ) !== false ) {
				// Keep track of POST ID that has navigation block.
				$ocdi_post_nav_block = get_transient( 'ocdi_import_posts_with_nav_block' );

				if ( empty( $ocdi_post_nav_block ) ) {
					$ocdi_post_nav_block = [];
				}

				$ocdi_post_nav_block[] = $post_id;

				set_transient( 'ocdi_import_posts_with_nav_block', $ocdi_post_nav_block, HOUR_IN_SECONDS );
			}
		} else {

			/*
			 * Save the `wp_navigation` post type mapping of the original menu ID and the new menu ID
			 * in transient.
			 */
			$ocdi_menu_mapping = get_transient( 'ocdi_import_menu_mapping' );

			if ( empty( $ocdi_menu_mapping ) ) {
				$ocdi_menu_mapping = [];
			}

			// Let's save the mapping of the original menu ID and the new menu ID.
			$ocdi_menu_mapping[] = [
				'original_menu_id' => $original_id,
				'new_menu_id'      => $post_id,
			];

			set_transient( 'ocdi_import_menu_mapping', $ocdi_menu_mapping, HOUR_IN_SECONDS );
		}
	}

	/**
	 * Fix issue with WP Navigation block.
	 *
	 * We did this by looping through all the imported posts with the WP Navigation block
	 * and replacing the original menu ID with the new menu ID.
	 *
	 * @since 3.2.0
	 */
	public function fix_imported_wp_navigation() {

		// Get the `wp_navigation` import mapping.
		$nav_import_mapping = get_transient( 'ocdi_import_menu_mapping' );

		// Get the post IDs that needs to be updated.
		$posts_nav_block = get_transient( 'ocdi_import_posts_with_nav_block' );

		if ( empty( $nav_import_mapping ) || empty( $posts_nav_block ) ) {
			return;
		}

		$replace_pairs = [];

		foreach ( $nav_import_mapping as $mapping ) {
			$replace_pairs[ '<!-- wp:navigation {"ref":' . $mapping['original_menu_id'] . '} /-->' ] = '<!-- wp:navigation {"ref":' . $mapping['new_menu_id'] . '} /-->';
		}

		// Loop through each the posts that needs to be updated.
		foreach ( $posts_nav_block as $post_id ) {
			$post_nav_block = get_post( $post_id );

			if ( empty( $post_nav_block ) || empty( $post_nav_block->post_content ) ) {
				return;
			}

			wp_update_post(
				[
					'ID'           => $post_id,
					'post_content' => strtr( $post_nav_block->post_content, $replace_pairs ),
				]
			);
		}
	}

	/**
	 * Update imported terms count.
	 */
	private function update_terms_count() {

		foreach ( $this->imported_terms as $tax => $terms ) {
			wp_update_term_count_now( $terms, $tax );
		}
	}

	/**
	 * Get the import buttons HTML for the successful import page.
	 *
	 * @since 3.2.0
	 *
	 * @return string
	 */
	public function get_import_successful_buttons_html() {

		/**
		 * Filter the buttons that are displayed on the successful import page.
		 *
		 * @since 3.2.0
		 *
		 * @param array $buttons {
		 *     Array of buttons.
		 *
		 *     @type string $label  Button label.
		 *     @type string $class  Button class.
		 *     @type string $href   Button URL.
		 *     @type string $target Button target. Can be `_blank`, `_parent`, `_top`. Default is `_self`.
		 * }
		 */
		$buttons = Helpers::apply_filters(
			'ocdi/import_successful_buttons',
			[
				[
					'label'  => __( 'Theme Settings' , 'one-click-demo-import' ),
					'class'  => 'button button-primary button-hero',
					'href'   => admin_url( 'customize.php' ),
					'target' => '_blank',
				],
				[
					'label'  => __( 'Visit Site' , 'one-click-demo-import' ),
					'class'  => 'button button-primary button-hero',
					'href'   => get_home_url(),
					'target' => '_blank',
				],
			]
		);

		if ( empty( $buttons ) || ! is_array( $buttons ) ) {
			return '';
		}

		ob_start();

		foreach ( $buttons as $button ) {

			if ( empty( $button['href'] ) || empty( $button['label'] ) ) {
				continue;
			}

			$target = '_self';
			if (
				! empty( $button['target'] ) &&
				in_array( strtolower( $button['target'] ), [ '_blank', '_parent', '_top' ], true )
			) {
				$target = $button['target'];
			}

			$class = 'button button-primary button-hero';
			if ( ! empty( $button['class'] ) ) {
				$class = $button['class'];
			}

			printf(
				'<a href="%1$s" class="%2$s" target="%3$s">%4$s</a>',
				esc_url( $button['href'] ),
				esc_attr( $class ),
				esc_attr( $target ),
				esc_html( $button['label'] )
			);
		}

		$buttons_html = ob_get_clean();

		return empty( $buttons_html ) ? '' : $buttons_html;
	}
}