💻 Shopping Cart

products = {
    "Apple":    {"price": 50,  "stock": 100},
    "Banana":   {"price": 30,  "stock": 150},
    "Milk":     {"price": 60,  "stock": 50},
    "Bread":    {"price": 40,  "stock": 80},
    "Rice":     {"price": 120, "stock": 30},
    "Dal":      {"price": 100, "stock": 40},
    "Biscuit":  {"price": 25,  "stock": 200},
    "Shampoo":  {"price": 180, "stock": 25},
}

cart = {}
print("=== Online Shopping Cart ===")

while True:
    print("
1. Products dekho")
    print("2. Cart mein add karo")
    print("3. Cart se remove karo")
    print("4. Cart dekho")
    print("5. Checkout (Bill)")
    print("6. Baahar jao")
    ch = input("Choice: ")
    if ch == "1":
        print(f"
{'Product':12} {'Price':8} {'Stock'}")
        print("-" * 30)
        for name, info in products.items():
            print(f"  {name:10}  Rs{info['price']:6}  {info['stock']} units")
    elif ch == "2":
        name = input("Product naam: ").title()
        if name in products:
            qty = int(input(f"Quantity: "))
            if qty <= products[name]["stock"]:
                cart[name] = cart.get(name, 0) + qty
                products[name]["stock"] -= qty
                print(f"  {qty}x {name} cart mein add hua!")
            else:
                print(f"  Sirf {products[name]['stock']} units available!")
        else:
            print("  Product nahi mila!")
    elif ch == "3":
        name = input("Remove product: ").title()
        if name in cart:
            qty = int(input(f"Kitna remove karein (max {cart[name]}): "))
            qty = min(qty, cart[name])
            cart[name] -= qty
            products[name]["stock"] += qty
            if cart[name] == 0: del cart[name]
            print(f"  {qty}x {name} removed!")
        else:
            print("  Cart mein nahi hai!")
    elif ch == "4":
        if not cart:
            print("Cart khaali hai!")
        else:
            print(f"
{'Product':12} {'Qty':6} {'Price':8} {'Subtotal'}")
            print("-" * 40)
            total = 0
            for name, qty in cart.items():
                sub = products[name]["price"] * qty
                total += sub
                print(f"  {name:10}  {qty:5}  Rs{products[name]['price']:6}  Rs{sub}")
            print(f"
  Total: Rs{total}")
    elif ch == "5":
        if not cart:
            print("Cart khaali hai!")
        else:
            total    = sum(products[n]["price"]*q for n,q in cart.items())
            discount = total * 0.1 if total > 500 else 0
            gst      = (total - discount) * 0.05
            grand    = total - discount + gst
            print(f"
=== BILL ===")
            for name, qty in cart.items():
                print(f"  {name}: {qty} x Rs{products[name]['price']}")
            print(f"
  Subtotal : Rs{total:.0f}")
            if discount: print(f"  Discount : -Rs{discount:.0f} (10% off Rs500+)")
            print(f"  GST (5%) : Rs{gst:.0f}")
            print(f"  Total    : Rs{grand:.0f}")
            cart = {}
            print("
Shukriya! Dobara aaiye!")
    elif ch == "6":
        break