from machine import Pin
import time

PRODUCTS = {
    "04AABBCC01": ("T-shirt blanc", 12.50),
    "04AABBCC02": ("Bouteille d'eau 1L", 1.95),
    "04AABBCC03": ("Barre chocolat", 0.95)
}

cart = []

SIMULATED_UIDS = [
    "04AABBCC01",
    "04AABBCC02",
    "04AABBCC03"
]

BUTTON_PINS = [14, 15, 16]

buttons = []
for pin_number in BUTTON_PINS:
    button = Pin(pin_number, Pin.IN, Pin.PULL_DOWN)
    buttons.append(button)

def find_product_by_uid(uid):#identifier l'article
    if uid in PRODUCTS:
        return PRODUCTS[uid]
    else:
        return None

def add_to_cart(uid): #panier
    product = find_product_by_uid(uid)

    if product is not None:#produit existe
        name = product[0]
        price = product[1]
        cart.append((uid, name, price))
        print("Produit ajouté au panier :", name, "-", price, "€")
    else:
        print("Erreur : UID non reconnu :", uid)

def cart_total():#additionner les prix dans le panier
    total = 0
    for item in cart:
        price = item[2]#3e élément du tuple
        total = total + price
    return total

print("Simulation de caisse NFC ")
print("Appuie sur un bouton pour simuler un tag NFC.")
print("Bouton sur GP14 -> UID 04AABBCC01")
print("Bouton sur GP15 -> UID 04AABBCC02")
print("Bouton sur GP16 -> UID 04AABBCC03")
print("--------------------------------------------------")

while True:
    for index in range(len(buttons)):
        button = buttons[index]

        if button.value() == 1:
            uid = SIMULATED_UIDS[index]

            print("\nTag détecté ! UID =", uid)

            add_to_cart(uid)

            total = cart_total()
            print("Total actuel du panier :", total, "€")

            while button.value() == 1:
                time.sleep(0.05)

    time.sleep(0.05)