import collections

ItemToPurchase = collections.namedtuple('ItemToPurchase', 'item_name item_quantity item_price item_description')

def construct_item():
    global new_item
    new_item = ItemToPurchase(item_name = 'none', item_quantity = 0,  item_price = 0, item_description = 'none' )
    #print(new_item)
    return new_item

def print_item_cost(new_item1,new_item2):
    total1 = new_item1[1] * new_item1[2]
    total2 = new_item2[1] * new_item2[2]
    print()
    print('TOTAL COST')
    print('%s %.0f @ $%d = $' % new_item1[0:3] + str(int(total1)))
    print('%s %.0f @ $%d = $' % new_item2[0:3] + str(int(total2)))
    print()
    added_total = int(total1) + int(total2)
    print('Total: $%d' % added_total)

#def print_item_description():
#    print('%s : %s' % new_item1[0] + newitem1[4])

ShoppingCart = collections.namedtuple('ShoppingCart', 'customer_name current_date cart_items')
def construct_cart():
    global ShoppingCart
    ShoppingCart = ShoppingCart(customer_name = 'none', current_date = 'January 1, 2016', cart_items = [])
    return ShoppingCart

def print_menu():
    menu = '''MENU
a - Add item to cart
r - Remove item from cart
c - Change item quantity
i - Output items\' descriptions
o - Output shopping cart
q - Quit'''
    print(menu)
    print()
    menu_option = input('Choose an option:\n')

    while menu_option != 'q':
        if menu_option == 'a':
            add_item(ShoppingCart,ItemToPurchase)
            print()
            print(menu)
            print()
        elif menu_option == 'o':
            print_total(ShoppingCart)
            print(menu)
            print()

        menu_option = input('Choose an option:\n')

def add_item(ShoppingCart, ItemToPurchase):
    new_item = construct_item()
    cart_items = ShoppingCart[2]
    print('ADD ITEM TO CART')
    add_name = input('Enter the item name:\n')
    add_description = input('Enter the item description:\n')
    add_price = int(input('Enter the item price:\n'))
    add_quantity = int(input('Enter the item quantity:\n'))
    new_item = new_item._replace(item_name = add_name, item_price = add_price, item_quantity = add_quantity, item_description = add_description)
    cart_items.append(new_item)
    #print(ShoppingCart)

def print_total(ShoppingCart):
    cart_items = ShoppingCart[2]
    print('OUTPUT SHOPPING CART')
    print("%s's Shopping Cart - %s" % (ShoppingCart[0],ShoppingCart[1]))
    if cart_items == []:
        print('Number of Items: %d\n' % len(ShoppingCart[2]))
        print('SHOPPING CART IS EMPTY\n')
        print('Total: $0\n')
    else:
        print('Number of Items: %d\n' % cart_items[0][1])
        #FIXME Write a For loop so that it goes through all the carts items.
        total = cart_items[0][1] * cart_items[0][2]
        print('%s %d @ $%d = $' % cart_items[0][0:3] + str(total))
        print()
        print('Total: $%d' % total)
        print()

if __name__ == "__main__":
    # Type main section of code here
    #print_item_cost(new_item)
    new_customer = input('Enter customer\'s name:\n')
    date = input('Enter today\'s date:\n')
    construct_cart()
    ShoppingCart = ShoppingCart._replace(customer_name = new_customer, current_date = date)
    #print(ShoppingCart)
    print()
    print('Customer name:', new_customer)
    print('Today\'s date:', date)
    print()
    print_menu()
'''
    new_item1 = construct_item()
    new_item2 = construct_item()
    print('Item 1')
    item_name1 = input('Enter the item name:\n')
    item_price1 = float(input('Enter the item price:\n'))
    item_quantity1 = int(input('Enter the item quantity:\n'))
    new_item1 = new_item1._replace(item_name = item_name1, item_price = item_price1, item_quantity = item_quantity1)
    print()
    print('Item 2')
    item_name2 = input('Enter the item name:\n')
    item_price2 = float(input('Enter the item price:\n'))
    item_quantity2 = int(input('Enter the item quantity:\n'))
    new_item2 = new_item1._replace(item_name = item_name2, item_price = item_price2, item_quantity = item_quantity2)
    print_item_cost(new_item1,new_item2)
    '''