<?php
/**
 * The Dashboard's "Menu item visibility" card.
 *
 * @package Yangra\Conditional
 */

namespace Yangra\Conditional\Admin;

use Yangra\Conditional\Menus\MenuItemsWithRules;
use Yangra\Conditional\Rules\RuleSummary;

defined( 'ABSPATH' ) || exit;

/**
 * Counts the menu items with an active rule and the menus they're in, and
 * lists them newest first with a rule summary and an edit link: Appearance →
 * Menus for classic menus, the Site Editor for Navigation blocks.
 *
 * Only for users who can edit menus (`edit_theme_options`).
 */
class MenuItemsCard {

	/**
	 * Capability needed to see the card.
	 */
	const CAPABILITY = 'edit_theme_options';

	/**
	 * Items listed on the card itself.
	 */
	const CARD_ITEMS = 10;

	/**
	 * Items per page of the full list.
	 */
	const PER_PAGE = 20;

	/**
	 * Menu items with rules.
	 *
	 * @var MenuItemsWithRules
	 */
	private $items;

	/**
	 * Rule summaries.
	 *
	 * @var RuleSummary
	 */
	private $summary;

	/**
	 * Constructor.
	 *
	 * @param MenuItemsWithRules $items   Menu items with rules.
	 * @param RuleSummary        $summary Rule summaries.
	 */
	public function __construct( MenuItemsWithRules $items, RuleSummary $summary ) {
		$this->items   = $items;
		$this->summary = $summary;
	}

	/**
	 * Whether the current user can see the card.
	 *
	 * @return bool
	 */
	public function can_view(): bool {
		return current_user_can( self::CAPABILITY );
	}

	/**
	 * The card's data: counts, one page of items, and where menus are set up.
	 *
	 * @param int $page     Page number, from 1.
	 * @param int $per_page Items per page.
	 * @return array{total: int, menus: int, page: int, pages: int, items: array<int, array{key: string, label: string, menuName: string, menuType: string, editUrl: string, summary: string}>, setupLinks: array<int, array{label: string, url: string}>}
	 */
	public function data( int $page = 1, int $per_page = self::CARD_ITEMS ): array {
		$all      = $this->items->all();
		$total    = count( $all );
		$per_page = max( 1, $per_page );
		$pages    = (int) max( 1, ceil( $total / $per_page ) );
		$page     = min( max( 1, $page ), $pages );

		$menus = array();
		foreach ( $all as $item ) {
			$menus[ $item['source'] . '-' . $item['menu'] ] = true;
		}

		$items = array();
		foreach ( array_slice( $all, ( $page - 1 ) * $per_page, $per_page ) as $item ) {
			$items[] = array(
				'key'      => $item['key'],
				'label'    => '' !== $item['label'] ? $item['label'] : __( '(no label)', 'yangra-conditional' ),
				'menuName' => '' !== $item['menu_name'] ? $item['menu_name'] : __( '(no title)', 'yangra-conditional' ),
				'menuType' => $item['menu_type'],
				'editUrl'  => $item['edit_url'],
				'summary'  => $this->summary->summarize( $item['rule'] ),
			);
		}

		return array(
			'total'      => $total,
			'menus'      => count( $menus ),
			'page'       => $page,
			'pages'      => $pages,
			'items'      => $items,
			'setupLinks' => $this->setup_links(),
		);
	}

	/**
	 * Where the active theme's menus are edited, for the empty card's tip.
	 *
	 * @return array<int, array{label: string, url: string}>
	 */
	private function setup_links(): array {
		$links = array();
		if ( current_theme_supports( 'menus' ) ) {
			$links[] = array(
				'label' => __( 'Appearance → Menus', 'yangra-conditional' ),
				'url'   => admin_url( 'nav-menus.php' ),
			);
		}
		if ( wp_is_block_theme() ) {
			// WordPress 6.8+ redirects this older path to its current Navigation screen.
			$links[] = array(
				'label' => __( 'Navigation in the Site Editor', 'yangra-conditional' ),
				'url'   => admin_url( 'site-editor.php?path=/navigation' ),
			);
		}

		return $links;
	}
}