import uuid
from datetime import datetime

from pydantic import BaseModel, field_validator
import re


class TenantBase(BaseModel):
    name: str
    slug: str

    @field_validator("slug")
    @classmethod
    def slug_format(cls, v: str) -> str:
        if not re.match(r"^[a-z0-9-]+$", v):
            raise ValueError(
                "Der Slug darf nur Kleinbuchstaben, Zahlen und Bindestriche enthalten."
            )
        return v


class TenantCreate(TenantBase):
    pass


class TenantUpdate(BaseModel):
    name: str | None = None
    slug: str | None = None

    @field_validator("slug")
    @classmethod
    def slug_format(cls, v: str | None) -> str | None:
        if v is not None and not re.match(r"^[a-z0-9-]+$", v):
            raise ValueError(
                "Der Slug darf nur Kleinbuchstaben, Zahlen und Bindestriche enthalten."
            )
        return v


class TenantRead(TenantBase):
    model_config = {"from_attributes": True}

    id: uuid.UUID
    created_at: datetime
    updated_at: datetime