from datetime import datetime, date, timedelta
from decimal import Decimal
DATE_FORMAT = '%Y-%m-%d'
goods = {}


def add(items, title, amount, expiration_date=None):
    if title in items:
        if expiration_date:
             expiration_date = datetime.strptime(expiration_date, '%Y-%m-%d').date()
             items[title].append({'amount': amount, 'expiration_date': expiration_date})
        else:
            items[title] = [{'amount': amount, 'expiration_date': expiration_date}]

 #add({}, 'Паэлья', Decimal('1'), '2024-03-20')
#print(goods)
def add_by_note(items, note):
    string = note.split()
    if string[-1].count('/') == 2 and all(char.isdigit() or char == '/' for char in string[-1]):
        quantity = Decimal(string[-1])
        product = ' '.join(string[:-1])
    else:
        return 'Неправильно. Последняя часть  должна быть датой в формате dd/mm/yyyy'

    items.append({'product': product, 'quantity': quantity})
    items = add(items, product, quantity, string[-1])
    return items


def find(items, needle):
    outcome = []
    for key in items:
        if needle.lower() in key.lower():
            outcome.append(key)
    return outcome


def amount(items, needle):
    total_amount = 0
    matching_items = [item for item in items if item.find(needle) != -1]
    for item in matching_items:
        total_amount += item.amount
    return total_amount


def expire(items, in_advance_days=0):
    today = date.today()
    expiration_date = item.expiration_date
    warning_date = expiration_date - timedelta(days=in_advance_days)

    return today >= expiration_date or today >= warning_date