from pydantic import BaseModel, ConfigDict, HttpUrl, field_validator


def _blank_to_none(value: str | None) -> str | None:
    if isinstance(value, str) and not value.strip():
        return None
    return value


class ManufacturerBase(BaseModel):
    name: str
    url: HttpUrl | None = None
    logo_url: HttpUrl | None = None

    _normalize_url = field_validator("url", "logo_url", mode="before")(
        _blank_to_none
    )


class ManufacturerCreate(ManufacturerBase):
    pass


class ManufacturerUpdate(BaseModel):
    name: str | None = None
    url: HttpUrl | None = None
    logo_url: HttpUrl | None = None

    _normalize_url = field_validator("url", "logo_url", mode="before")(
        _blank_to_none
    )


class ManufacturerRead(ManufacturerBase):
    model_config = ConfigDict(from_attributes=True)

    id: int