Prestashop end module

Step 1 A person signs up to the site after which he is associated with a personal code after the purchase Step 2 has four possibilities for having the product -1 buy the product at full price -2 invites a friend is has the first discount -3 invites two friends and has a further discount -4 invites three friends is has the maximum discount (This concerns those who spend the same sum or more) The customer to book the product initially has 2 options or pay the product at full price or pay with the maximum discount and then put on the waiting list Step 3 Once the payment has been made by postal order or bank transfer, the customer must return to his site account to send a photo / screen of the actual payment in the dedicated space Step 4 when the customer has completed his order via codes overalls will receive a confirmation email. As for the lower codes You will not have any discount until the full price of the product is reached If my product costs 1000 € I have to bring people as long as the sum of the product at full price is reached Missing how much % you earn with friends order Example You want a new iphone and cost 1000€ and you invite me and another friend to buy something on this site. If 3 of your friends buy something you discounted your iphone so you pay iphon 600€ not 1000€ If 5 of your friend buy something you discounted your iphone cost 300€ Your friend and I we buy from a coupon you send me by email ok? If I make and order over 100€ you receive a % of discount and so go on until you can buy iphone and pay it 600€ or 300€ ok? In back end in product page, admin can set up 3 type of price in base how many friend buys it until you has a discount.