"""Model produk Catalog. Atribut khusus per kategori mengikuti AR-01 / FR-CAT-03."""

from abc import ABC, abstractmethod
from datetime import date

CLOTHING_SIZES = ("S", "M", "L", "XL")


class Product(ABC):
    """Kelas dasar produk. Subclass menentukan atribut khusus kategorinya."""

    category = "generic"

    def __init__(self, product_id, shop_id, name, price, on_hand, reserved=0):
        if price < 0:
            raise ValueError("price tidak boleh negatif")
        if not 0 <= reserved <= on_hand:
            raise ValueError("reserved harus di antara 0 dan on_hand")
        self.product_id = product_id
        self.shop_id = shop_id
        self.name = name
        self.price = price
        self.on_hand = on_hand
        self.reserved = reserved

    @property
    def available(self):
        """Stok yang dapat dipesan: onHand - reserved (glosarium SRS)."""
        return self.on_hand - self.reserved

    def is_orderable(self, today):
        """Aturan dasar: produk dapat dipesan jika masih ada stok tersedia."""
        return self.available > 0

    @abstractmethod
    def attributes(self):
        """Atribut khusus kategori, dikembalikan sebagai dict."""


class FoodProduct(Product):
    category = "food"

    def __init__(self, product_id, shop_id, name, price, on_hand, expiry_date, reserved=0):
        super().__init__(product_id, shop_id, name, price, on_hand, reserved)
        self.expiry_date = expiry_date

    def is_orderable(self, today):
        """Makanan tidak boleh dipesan setelah tanggal kedaluwarsa."""
        return super().is_orderable(today) and today <= self.expiry_date

    def attributes(self):
        return {"expiryDate": self.expiry_date.isoformat()}


class ClothingProduct(Product):
    category = "clothing"

    def __init__(self, product_id, shop_id, name, price, on_hand, size, reserved=0):
        if size not in CLOTHING_SIZES:
            raise ValueError(f"size harus salah satu dari {CLOTHING_SIZES}")
        super().__init__(product_id, shop_id, name, price, on_hand, reserved)
        self.size = size

    def attributes(self):
        return {"size": self.size}