from typing import List, Union
from datetime import datetime

from product import Product

class Person:
    def __init__(self, id: int, name: str) -> None:
        self.id = id
        self.name = name

class Measurement:
    def __init__(self, qty: int, unit: str) -> None:
        self.qty = qty
        self.unit = unit

class Ingredient:
    def __init__(self, id: int, line: str, name: str, product: Product, measure: Measurement, preparation: str) -> None:
        self.id = id
        self.name = name
        self.product = product
        self.measure = measure
        self.line = line
        self.preparation = preparation

class Recipe:
    def __init__(self, id: int, name: str, link: str, ingredients: List[Ingredient]) -> None:
        self.id = id
        self.name = name
        self.link = link
        self.ingredients = ingredients

class Meal:
    def __init__(self, id: int, date: datetime, chef: List[Person], cleanup: List[Person],
                 consumers: List[Person], recipes: List[Recipe]) -> None:
        self.id = id
        self.date = date
        self.chef = chef
        self.cleanup = cleanup
        self.consumers = consumers
        self.recipes = recipes

class ShoppingListItem:
    def __init__(self, id: int, food_item: Product, measure: Measurement, source: Union[Meal, None]) -> None:
        self.id = id
        self.food_item = food_item
        self.measure = measure
        self.source = source

class ShoppingList:
    def __init__(self, date: datetime, items: List[ShoppingListItem]) -> None:
        self.date = date
        self.items = items