<?php
/**
 * Inline WordPress admin-menu controls and assets.
 *
 * @package AdminGrip
 */

namespace AdminGrip;

/**
 * Adds collision-resistant slug identities and loads the inline UI.
 */
final class Admin_UI {
	/**
	 * Registers UI hooks.
	 *
	 * @return void
	 */
	public function register() {
		add_filter( 'add_menu_classes', array( $this, 'add_identity_classes' ), 1000 );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_assets' ) );
	}

	/**
	 * Adds a deterministic AdminGrip-only identity class to each menu row.
	 *
	 * @param array $menu WordPress admin menu definition.
	 * @return array
	 */
	public function add_identity_classes( $menu ) {
		if ( ! Admin_Menu_Order::is_supported_context() || ! is_array( $menu ) ) {
			return $menu;
		}

		foreach ( $menu as $index => $menu_item ) {
			if ( ! is_array( $menu_item ) || ! isset( $menu_item[2] ) || ! is_string( $menu_item[2] ) ) {
				continue;
			}

			$classes           = isset( $menu_item[4] ) && is_string( $menu_item[4] ) ? $menu_item[4] : '';
			$menu[ $index ][4] = trim( $classes . ' ' . self::identity_class( $menu_item[2] ) );
		}

		return $menu;
	}

	/**
	 * Enqueues AdminGrip only on normal site-admin screens with a menu.
	 *
	 * @return void
	 */
	public function enqueue_assets() {
		global $menu;

		if ( ! Admin_Menu_Order::is_supported_context() || ! is_array( $menu ) || empty( $menu ) ) {
			return;
		}

		$slug_map = array();

		foreach ( $menu as $menu_item ) {
			if ( is_array( $menu_item ) && isset( $menu_item[2] ) && is_string( $menu_item[2] ) ) {
				$slug_map[ self::identity_class( $menu_item[2] ) ] = $menu_item[2];
			}
		}

		wp_enqueue_style(
			'admingrip-admin',
			plugins_url( 'assets/admin.css', ADMINGRIP_FILE ),
			array(),
			ADMINGRIP_VERSION
		);

		wp_enqueue_script(
			'admingrip-admin',
			plugins_url( 'assets/admin.js', ADMINGRIP_FILE ),
			array( 'jquery', 'jquery-ui-sortable', 'wp-a11y' ),
			ADMINGRIP_VERSION,
			true
		);

		wp_localize_script(
			'admingrip-admin',
			'admingripSettings',
			array(
				'ajaxUrl' => admin_url( 'admin-ajax.php' ),
				'nonce'   => wp_create_nonce( 'admingrip_menu_order' ),
				'slugMap' => $slug_map,
				'actions' => array(
					'save'  => 'admingrip_save_order',
					'reset' => 'admingrip_reset_order',
				),
				'i18n'    => array(
					'arrange'       => __( 'Arrange Menu', 'admingrip' ),
					'done'          => __( 'Done', 'admingrip' ),
					'reset'         => __( 'Reset', 'admingrip' ),
					'saving'        => __( 'Saving…', 'admingrip' ),
					'saved'         => __( 'Saved', 'admingrip' ),
					'couldNotSave'  => __( 'Could not save', 'admingrip' ),
					'resetConfirm'  => __( 'Reset your admin menu to the default order?', 'admingrip' ),
					/* translators: %s: visible admin menu item name. */
					'moveLabel'     => __( 'Move %s', 'admingrip' ),
					/* translators: 1: visible admin menu item name, 2: one-based menu position. */
					'moved'         => __( '%1$s moved to position %2$d.', 'admingrip' ),
					'instructions'  => __( 'Menu arrangement mode. Use drag handles or Alt plus Arrow Up or Arrow Down.', 'admingrip' ),
					'saveSucceeded' => __( 'Menu order saved.', 'admingrip' ),
					'saveFailed'    => __( 'Menu order could not be saved. The previous order was restored.', 'admingrip' ),
					'resetFailed'   => __( 'Menu order could not be reset.', 'admingrip' ),
				),
			)
		);
	}

	/**
	 * Derives a CSS-safe identity while retaining exact slugs in the map.
	 *
	 * @param string $slug Exact WordPress menu slug.
	 * @return string
	 */
	private static function identity_class( $slug ) {
		return 'admingrip-slug-' . hash( 'sha256', $slug );
	}
}