from __future__ import annotations
import uuid
from datetime import datetime, timezone
from sqlalchemy import DateTime, String
from sqlalchemy.orm import Mapped, mapped_column
from .base import Base


class Host(Base):
    """A registered host. Reachability/DNS/HTTP checks are now separate Monitor
    rows that link back via Monitor.host_id — a Host is just identity + address.
    """
    __tablename__ = "hosts"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    name: Mapped[str] = mapped_column(String(128), nullable=False)
    address: Mapped[str] = mapped_column(String(255), nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=lambda: datetime.now(timezone.utc)
    )