function send_additional_drip_events( $order_id, $contact_id ) {

    $order = wc_get_order( $order_id );

    $events = array();

    foreach ($order->get_items() as $item) {

        $product_id = $item->get_product_id();
        $product_name = $item->get_name();

        $categories = get_the_terms( $product_id, 'product_cat' );

        $categories_array = array();

        foreach( $categories as $category ) {
            $categories_array[] = $category->name;
        }

        $categories_string = implode(', ', $categories_array);

        $event_expires_at = get_post_meta( $product_id, 'event_expires_at', true );

        $event_expires_at = date( 'Y-m-d', strtotime( $event_expires_at ) );

        $events[] = (object) array(
            'email'         => wp_fusion()->crm->get_email_from_cid($contact_id),
            'action'        => 'Product Purchased',
            'properties'    => array(
                'product_name'      => $product_name,
                'product_id'        => $product_id,
                'product_cat'       => $categories_string,
                'expires_at'        => $event_expires_at
            )
        );

    }

    $event_data = array( 'events' => $events );

    error_log('sending events');
    error_log(print_r($event_data, true));

    $api_token  = wp_fusion()->settings->get( 'drip_token' );
    $account_id = wp_fusion()->settings->get( 'drip_account' );

    $params = array(
        'headers'   => array(
            'Authorization' => 'Basic ' . base64_encode($api_token),
            'Content-Type'  => 'application/json'
        ),
        'body'      => json_encode($event_data)
    );

    $request = 'https://api.getdrip.com/v2/' . $account_id . '/events/';

    $response = wp_remote_post( $request, $params );

}

add_action( 'wpf_woocommerce_payment_complete', 'send_additional_drip_events', 10, 2 );