<?php
/**
 * Registers and conditionally enqueues frontend and admin assets.
 *
 * Frontend assets are registered (but not enqueued) on `wp_enqueue_scripts`
 * so that the shortcode handler, and the Elementor/Divi integrations, can
 * enqueue them on-demand only when a slider actually renders on the page.
 * This avoids loading CSS/JS site-wide.
 *
 * @package DeveloperSD_Logo_Slider
 */

defined( 'ABSPATH' ) || exit;

/**
 * Class DeveloperSD_LS_Assets
 */
class DeveloperSD_LS_Assets {

	/**
	 * Handle used for the frontend stylesheet.
	 *
	 * @var string
	 */
	const FRONTEND_STYLE = 'developersd-ls-frontend';

	/**
	 * Handle used for the frontend script.
	 *
	 * @var string
	 */
	const FRONTEND_SCRIPT = 'developersd-ls-frontend';

	/**
	 * Handle used for the admin stylesheet.
	 *
	 * @var string
	 */
	const ADMIN_STYLE = 'developersd-ls-admin';

	/**
	 * Handle used for the admin script.
	 *
	 * @var string
	 */
	const ADMIN_SCRIPT = 'developersd-ls-admin';

	/**
	 * Handle used for the bundled Slick Carousel stylesheet.
	 *
	 * @var string
	 */
	const SLICK_STYLE = 'developersd-ls-slick';

	/**
	 * Handle used for the bundled Slick Carousel script.
	 *
	 * @var string
	 */
	const SLICK_SCRIPT = 'developersd-ls-slick';

	/**
	 * Hook registration.
	 */
	public function __construct() {
		add_action( 'wp_enqueue_scripts', array( $this, 'register_frontend_assets' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'maybe_enqueue_admin_assets' ) );
	}

	/**
	 * Register (do not enqueue) frontend assets.
	 *
	 * Slick Carousel is bundled locally under assets/vendor/slick/ (MIT
	 * licensed - see assets/vendor/slick/LICENSE) rather than loaded from a
	 * CDN, so the plugin has no external runtime dependency. Only Slick's
	 * core script and structural stylesheet are bundled; slick-theme.css
	 * and its icon font are intentionally omitted, since this plugin
	 * supplies its own arrow/dot styling in frontend.css.
	 */
	public function register_frontend_assets() {
		self::ensure_frontend_assets_registered();
	}

	/**
	 * Ensure frontend assets are registered in the current request.
	 *
	 * The slider can also be rendered from wp-admin (live preview and the
	 * standalone preview action), where the normal `wp_enqueue_scripts` hook
	 * never runs. Registering lazily here keeps those previews functional too.
	 */
	public static function ensure_frontend_assets_registered() {
		if ( ! wp_style_is( self::SLICK_STYLE, 'registered' ) ) {
			wp_register_style(
				self::SLICK_STYLE,
				DEVELOPERSD_LS_URL . 'assets/vendor/slick/slick.css',
				array(),
				'1.8.1'
			);
		}

		if ( ! wp_script_is( self::SLICK_SCRIPT, 'registered' ) ) {
			wp_register_script(
				self::SLICK_SCRIPT,
				DEVELOPERSD_LS_URL . 'assets/vendor/slick/slick.min.js',
				array( 'jquery' ),
				'1.8.1',
				true
			);
		}

		if ( ! wp_style_is( self::FRONTEND_STYLE, 'registered' ) ) {
			wp_register_style(
				self::FRONTEND_STYLE,
				DEVELOPERSD_LS_URL . 'assets/css/frontend.css',
				array( self::SLICK_STYLE ),
				DEVELOPERSD_LS_VERSION
			);
		}

		if ( ! wp_script_is( self::FRONTEND_SCRIPT, 'registered' ) ) {
			wp_register_script(
				self::FRONTEND_SCRIPT,
				DEVELOPERSD_LS_URL . 'assets/js/frontend.js',
				array( 'jquery', self::SLICK_SCRIPT ),
				DEVELOPERSD_LS_VERSION,
				true
			);
		}
	}

	/**
	 * Enqueue the frontend assets. Safe to call multiple times per request;
	 * WordPress de-dupes enqueue calls by handle.
	 */
	public static function enqueue_frontend_assets() {
		self::ensure_frontend_assets_registered();
		wp_enqueue_style( self::FRONTEND_STYLE );
		wp_enqueue_script( self::FRONTEND_SCRIPT );
	}

	/**
	 * Enqueue admin assets only on DeveloperSD Logo Slider screens.
	 *
	 * @param string $hook_suffix Current admin page hook suffix.
	 */
	public function maybe_enqueue_admin_assets( $hook_suffix ) {
		global $post_type;

		$is_plugin_screen = ( DeveloperSD_LS_Post_Type::POST_TYPE === $post_type )
			|| ( isset( $_GET['page'] ) && 0 === strpos( sanitize_text_field( wp_unslash( $_GET['page'] ) ), 'developersd-logo-slider' ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended

		if ( ! $is_plugin_screen ) {
			return;
		}

		wp_enqueue_media();

		// The edit screen contains an AJAX live preview that renders the exact
		// frontend markup. Load the same Slick + plugin assets here so the
		// preview behaves like the real shortcode instead of showing raw logos.
		if ( DeveloperSD_LS_Post_Type::POST_TYPE === $post_type ) {
			self::enqueue_frontend_assets();
		}

		wp_enqueue_style(
			self::ADMIN_STYLE,
			DEVELOPERSD_LS_URL . 'assets/css/admin.css',
			array(),
			DEVELOPERSD_LS_VERSION
		);

		// jQuery UI Sortable ships with WordPress core; reuse it instead of
		// bundling another copy.
		wp_enqueue_script(
			self::ADMIN_SCRIPT,
			DEVELOPERSD_LS_URL . 'assets/js/admin.js',
			array( 'jquery', 'jquery-ui-sortable', 'wp-util' ),
			DEVELOPERSD_LS_VERSION,
			true
		);

		wp_localize_script(
			self::ADMIN_SCRIPT,
			'DeveloperSDLogoSlider',
			array(
				'ajaxUrl'  => admin_url( 'admin-ajax.php' ),
				'nonce'    => wp_create_nonce( DeveloperSD_LS_Security::NONCE_ACTION_AJAX ),
				'postId'   => isset( $_GET['post'] ) ? absint( $_GET['post'] ) : 0, // phpcs:ignore WordPress.Security.NonceVerification.Recommended
				'i18n'     => array(
					'confirmDelete'   => __( 'Remove this logo from the slider?', 'developersd-logo-slider' ),
					'confirmDeleteSlider' => __( 'Delete this slider permanently? This cannot be undone.', 'developersd-logo-slider' ),
					'chooseImage'     => __( 'Select Logo Image', 'developersd-logo-slider' ),
					'chooseImages'    => __( 'Select Logo Images', 'developersd-logo-slider' ),
					'useImage'        => __( 'Use this image', 'developersd-logo-slider' ),
					'copied'          => __( 'Shortcode copied!', 'developersd-logo-slider' ),
					'noLogos'         => __( 'No logos yet. Click "Add Logo" to get started.', 'developersd-logo-slider' ),
					'savingPreview'   => __( 'Updating preview…', 'developersd-logo-slider' ),
					'statusUpdating'   => __( 'Updating status…', 'developersd-logo-slider' ),
					'statusError'      => __( 'Could not update the slider status. Please try again.', 'developersd-logo-slider' ),
				),
			)
		);
	}
}

new DeveloperSD_LS_Assets();