<?php

add_action( 'woocommerce_order_status_changed', array( $this, 'my_child_invoice_automation' ), 10, 4 );
add_action( 'woocommerce_germanized_order_confirmation_sent', array( $this, 'my_child_invoice_automation_instant' ), 10, 1 );

/**
* Generate invoices after status transition
*/
function my_child_invoice_automation( $order_id, $status_from, $status_to, $order ) {
    // Check the payment method
    if ( 'paypal' === $order->get_payment_method() ) {
        // Check the new order status -> generate invoice when status switched to processing
        if ( 'processing' === $status_to ) {
             WC_GZDP_Invoice_Helper::instance()->auto_generate_invoice( $order_id );
        }
    }
}

/**
* Generate invoices as soon as order is placed
*/
function my_child_invoice_automation_instant( $order_id ) {
    $order = wc_get_order( $order_id );

    if ( 'invoice' === $order->get_payment_method() ) {
        WC_GZDP_Invoice_Helper::instance()->auto_generate_invoice( $order_id );
    }
}