from __future__ import annotations
from pydantic import BaseModel, field_validator


class PricingItemSchema(BaseModel):
    product_name: str
    product_slug: str | None = None
    price_from: str | None = None
    price_unit: str | None = None
    price_label: str | None = None
    description: str | None = None
    features: list[str] = []
    notes: list[str] = []
    is_visible: bool = True

    @field_validator('features', 'notes', mode='before')
    @classmethod
    def coerce_none_to_list(cls, v):
        return v if v is not None else []


class PricingItemResponse(PricingItemSchema):
    id: int
    sort_order: int = 0

    class Config:
        from_attributes = True