import uuid
from datetime import datetime, timezone

from sqlalchemy import DateTime, ForeignKey, String
from sqlalchemy.orm import Mapped, mapped_column

from app.db import Base


class ContactSession(Base):
    __tablename__ = "contact_sessions"

    id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
    user_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("users.id"))
    entity_id: Mapped[uuid.UUID | None] = mapped_column(
        ForeignKey("entities.id"), nullable=True
    )
    mode: Mapped[str] = mapped_column(String(32), default="unknown")
    language: Mapped[str] = mapped_column(String(8), default="en")
    started_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )
    ended_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)