<?php
/**
 * Admin menu and app page.
 *
 * @package SpaceBay
 */

namespace SpaceBay\Admin;

use SpaceBay\Core\Assets;
use SpaceBay\Core\Capabilities;

defined( 'ABSPATH' ) || exit;

/**
 * Adds the SpaceBay admin page that hosts the Vue admin app.
 */
final class Menu {

	/**
	 * Admin page slug.
	 *
	 * @var string
	 */
	const SLUG = 'spacebay';

	/**
	 * Left-menu icon: the SpaceBay mark as a base64 SVG. WordPress recolours it
	 * with the admin colour scheme, so the fill below is only the default.
	 *
	 * @var string
	 */
	const ICON = 'data:image/svg+xml;base64,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';

	/**
	 * Hook suffix returned by add_menu_page().
	 *
	 * @var string
	 */
	private static $hook = '';

	/**
	 * Hooks admin actions.
	 *
	 * @return void
	 */
	public static function init() {
		add_action( 'admin_menu', array( __CLASS__, 'register' ) );
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'enqueue' ) );
		add_action( 'admin_init', array( __CLASS__, 'activation_redirect' ) );
		add_filter( 'admin_body_class', array( __CLASS__, 'body_class' ) );
	}

	/**
	 * Registers the top-level menu.
	 *
	 * @return void
	 */
	public static function register() {
		self::$hook = add_menu_page(
			__( 'SpaceBay', 'spacebay' ),
			__( 'SpaceBay', 'spacebay' ),
			Capabilities::MANAGE,
			self::SLUG,
			array( __CLASS__, 'render' ),
			self::ICON,
			26
		);

		// Each screen of the admin app gets its own submenu item. The part after
		// the hash is read by the app router, so the page loads only once.
		$screens = array(
			''          => __( 'Dashboard', 'spacebay' ),
			'/spaces'   => __( 'Spaces', 'spacebay' ),
			'/topics'   => __( 'Topics', 'spacebay' ),
			'/members'  => __( 'Members', 'spacebay' ),
			'/settings' => __( 'Settings', 'spacebay' ),
		);

		/**
		 * Filters the screens of the admin app that get a submenu item.
		 *
		 * Keys are routes of the admin app ("/shops"), values are labels.
		 * Add-ons add their screen with addRoute() in the admin app too.
		 *
		 * @since 1.0.0
		 *
		 * @param array<string, string> $screens Route => label.
		 */
		$extra = (array) apply_filters( 'spacebay_admin_screens', array() );

		foreach ( $extra as $route => $label ) {
			$route = '/' . trim( sanitize_text_field( (string) $route ), '/' );

			if ( '/' !== $route && ! isset( $screens[ $route ] ) ) {
				// Add-on screens go before Settings.
				$screens = array_slice( $screens, 0, -1, true ) + array( $route => (string) $label ) + array_slice( $screens, -1, 1, true );
			}
		}

		foreach ( $screens as $route => $label ) {
			add_submenu_page(
				self::SLUG,
				$label,
				$label,
				Capabilities::MANAGE,
				'' === $route ? self::SLUG : self::SLUG . '#' . $route,
				'' === $route ? array( __CLASS__, 'render' ) : '__return_null'
			);
		}
	}

	/**
	 * Enqueues the admin app on the SpaceBay page only.
	 *
	 * @param string $hook_suffix Current admin page hook.
	 * @return void
	 */
	public static function enqueue( $hook_suffix ) {
		if ( '' === self::$hook || self::$hook !== $hook_suffix ) {
			return;
		}

		// The media library is used to choose the community logo.
		wp_enqueue_media();
		Assets::enqueue_app( 'admin' );
	}

	/**
	 * Adds a body class on the SpaceBay page so styles stay scoped.
	 *
	 * @param string $classes Space-separated body classes.
	 * @return string
	 */
	public static function body_class( $classes ) {
		$screen = get_current_screen();

		if ( $screen && self::$hook === $screen->id ) {
			$classes .= ' sbay-admin-page';
		}

		return $classes;
	}

	/**
	 * Renders the mount point of the admin app.
	 *
	 * @return void
	 */
	public static function render() {
		if ( ! current_user_can( Capabilities::MANAGE ) ) {
			wp_die( esc_html__( 'Sorry, you are not allowed to access this page.', 'spacebay' ) );
		}

		$config = Assets::base_config();

		include SPACEBAY_PATH . 'templates/admin-page.php';
	}

	/**
	 * Opens the SpaceBay page once, right after a single activation.
	 *
	 * @return void
	 */
	public static function activation_redirect() {
		$user_id = (int) get_option( 'spacebay_activation_redirect' );

		if ( ! $user_id || get_current_user_id() !== $user_id ) {
			return;
		}

		delete_option( 'spacebay_activation_redirect' );

		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Read-only check of the core bulk-activation flag.
		if ( wp_doing_ajax() || is_network_admin() || isset( $_GET['activate-multi'] ) || ! current_user_can( Capabilities::MANAGE ) ) {
			return;
		}

		wp_safe_redirect( admin_url( 'admin.php?page=' . self::SLUG ) );
		exit;
	}
}