<?php
/**
 * Admin assets.
 *
 * @package AIBlackout
 */

namespace AIBlackout\Admin;

defined( 'ABSPATH' ) || exit;

/**
 * Loads the admin stylesheet and script.
 *
 * @since 1.0.0
 */
class Assets {

	/**
	 * Handle for the admin stylesheet.
	 *
	 * @var string
	 */
	const HANDLE = 'aiblackout-admin';

	/**
	 * Handle for the admin script.
	 *
	 * @var string
	 */
	const SCRIPT_HANDLE = 'aiblackout-admin-js';

	/**
	 * Registers hooks.
	 *
	 * @return void
	 */
	public function register(): void {
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue' ) );
	}

	/**
	 * Enqueues the stylesheet when the current screen belongs to this plugin,
	 * or is wp-admin's own Dashboard, which hosts the protection widget.
	 *
	 * @param string $hook_suffix The current admin page's hook suffix.
	 * @return void
	 */
	public function enqueue( string $hook_suffix = '' ): void {
		$is_plugin_screen = $this->is_plugin_screen();

		if ( ! $is_plugin_screen && 'index.php' !== $hook_suffix ) {
			return;
		}

		wp_enqueue_style(
			self::HANDLE,
			AIBLACKOUT_URL . 'assets/admin.css',
			array(),
			AIBLACKOUT_VERSION
		);

		if ( ! $is_plugin_screen ) {
			// Nothing on the Dashboard for the interactive script to act on.
			return;
		}

		wp_enqueue_script(
			self::SCRIPT_HANDLE,
			AIBLACKOUT_URL . 'assets/admin.js',
			array(),
			AIBLACKOUT_VERSION,
			true
		);

		wp_localize_script(
			self::SCRIPT_HANDLE,
			'aiblackoutGroupLabels',
			array(
				/* translators: %s: Number of crawlers. */
				'block'  => __( '%s blocked', 'ai-blackout' ),
				/* translators: %s: Number of crawlers. */
				'signal' => __( '%s asking', 'ai-blackout' ),
				/* translators: %s: Number of crawlers. */
				'allow'  => __( '%s allowed', 'ai-blackout' ),
			)
		);
	}

	/**
	 * Whether the screen being rendered is one of this plugin's.
	 *
	 * @return bool True on an AI Blackout screen.
	 */
	private function is_plugin_screen(): bool {
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Reading which admin screen is being rendered; nothing is acted on.
		if ( ! isset( $_GET['page'] ) ) {
			return false;
		}

		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- As above.
		$page = sanitize_key( wp_unslash( $_GET['page'] ) );

		return 0 === strpos( $page, MainScreen::SLUG );
	}
}