<?php
/**
 * Front-end checkout shortcode: renders the checkout form and registers the payment gateway assets it needs.
 *
 * @package Aims_Infosoft_LMS
 */

defined( 'ABSPATH' ) || exit;

/**
 * Renders the [aimslms_checkout] shortcode and enqueues its payment SDK assets.
 */
class AIMSLMS_Checkout {

	/**
	 * Register the shortcode and asset hooks.
	 */
	public function __construct() {
		add_shortcode( 'aimslms_checkout', array( $this, 'render' ) );
		add_action( 'wp_enqueue_scripts', array( $this, 'register_assets' ) );
	}

	/**
	 * Enqueue/localize the Stripe, Razorpay, and checkout script assets, only on the checkout page.
	 */
	public function register_assets() {

		if ( ! self::is_checkout_page() ) {
			return;
		}

		// phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion -- version is intentionally omitted; these are externally-hosted SDKs (Stripe/Razorpay) we don't control the versioning of, and the vendor's own CDN URL always serves their current version.
		wp_enqueue_script( 'stripe-js', 'https://js.stripe.com/v3/', array(), null, true );
		// phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion -- see note above.
		wp_enqueue_script( 'razorpay-js', 'https://checkout.razorpay.com/v1/checkout.js', array(), null, true );
		wp_register_script(
			'aimslms-checkout',
			AIMSLMS_PLUGIN_URL . 'public/js/aimslms-checkout.js',
			array(),
			'1.0',
			true
		);
		$razorpay_mode = get_option( 'aimslms_razorpay_payment_mode', 'sandbox' );
		$razorpay_key  = ( 'live' === $razorpay_mode )
		? get_option( 'aimslms_razorpay_live_key_id' )
		: get_option( 'aimslms_razorpay_test_key_id' );
		wp_localize_script(
			'aimslms-checkout',
			'aimslms_checkout',
			array(
				'ajax_url'     => admin_url( 'admin-ajax.php' ),
				'nonce'        => wp_create_nonce( 'aimslms_checkout_nonce' ),
				'stripe_key'   => ( 'live' === get_option( 'aimslms_stripe_payment_mode' ) )
					? get_option( 'aimslms_stripe_live_publishable' )
					: get_option( 'aimslms_stripe_test_publishable' ),
				'razorpay_key' => $razorpay_key,
			)
		);
	}
	/**
	 * Render the [aimslms_checkout] shortcode output.
	 *
	 * @return string Checkout template markup.
	 */
	public function render() {
		wp_enqueue_script( 'aimslms-checkout' );
		ob_start();
		include AIMSLMS_PLUGIN_DIR . 'public/templates/user/aimslms-checkout.php';

		return ob_get_clean();
	}

	/**
	 * Whether the current front-end request is actually the checkout page
	 * (or another page embedding the [aimslms_checkout] shortcode). Used to
	 * avoid loading the Stripe/Razorpay checkout SDKs - which eagerly fetch
	 * many extra script chunks on load - on every single page of the site.
	 */
	private static function is_checkout_page() {

		$checkout_page_id = get_option( 'aimslms_checkout_page' );

		if ( $checkout_page_id && is_page( $checkout_page_id ) ) {
			return true;
		}

		global $post;

		return $post instanceof WP_Post && has_shortcode( $post->post_content, 'aimslms_checkout' );
	}
}

new AIMSLMS_Checkout();