Set Shipping method pre selected when cart total is greater than 80

gistfile1.txt

if ( ! class_exists( 'WFACP_TT_FREE_Shipping' ) ) {

	class WFACP_TT_FREE_Shipping {
		private $run = false;

		public function __construct() {
			
			add_action( 'woocommerce_after_calculate_totals', [ $this, 'set_shipping' ] );
		}

		

		public function set_shipping() {
			
			$packages        = WC()->shipping()->get_packages();

	$total = (float) WC()->cart->cart_contents_total;
		
			
			
			if($total <=80){
				
				return;
			}
		
			
			$methods         = WC()->session->chosen_shipping_methods;
			$update_shipping = false;
			foreach ( $packages as $i => $package ) {
				$chosen_method = isset( WC()->session->chosen_shipping_methods[ $i ] ) ? WC()->session->chosen_shipping_methods[ $i ] : '';
				if ( false !== strpos( $chosen_method, 'free_shipping' ) ) {
					break;
				}
				if ( true == $update_shipping ) {
					break;
				}
				if ( isset( $package['rates'] ) ) {
					foreach ( $package['rates'] as $key => $pack ) {
						if ( false !== strpos( $key, 'free_shipping' ) ) {
							$methods[ $i ]   = $key;
							$update_shipping = true;
							break;
						}
					}

				}
			}
			$already_set = WC()->session->get( 'wfacp_already_set_free_shipping_' . WFACP_Common::get_id(), '' );
$already_set='no';
			if ( true == $update_shipping && 'yes' !== $already_set ) {
			
				WC()->session->set( 'chosen_shipping_methods', $methods );
				WC()->session->set( 'wfacp_already_set_free_shipping_' . WFACP_Common::get_id(), 'yes' );
			}
		}

	}

	new WFACP_TT_FREE_Shipping();
}