Hello.
My english is not so good, so I will try to be direct.
I'm in prestashop 1.6 and looking for an addon or someone who knows how to do the next:
I have 2 shipping methods
1- Pick up in the store - in this case nothing is needed to implement.
2- Transportista / Carrier
When customer choose "Transportista / Carrier" this is what I need:
The payment methods has to be hidden, they can't choose payment method yet. Instead has to appear a button "Calculate shipping costs", when user click on this button gets redirected to a standard presta page saying something like: "Your pre-order has been created. We are calculating shipping costs. In no more than 2 working days you will receive an Email with your order details shipping costs included and you will find a button to confirm and pay your order.
So when pre-order is created, in the admin side, the new order generated will be shown with statuds "Pending shipping costs" so the admin edit this order and add the shipping costs, this will change automaticly the status of the order to "Pending payment" and will send that email to the customer to finish the process.
Hope is all understood.