from __future__ import annotations

from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Index, Integer, String, func
from sqlalchemy.orm import Mapped, mapped_column

from supply_infra.db.base import Base


class AuthSession(Base):
    """Server-side browser session. Only a SHA-256 token hash is persisted."""

    __tablename__ = "auth_session"
    __table_args__ = (
        Index("idx_auth_session_user", "user_id", "expires_at"),
        Index("idx_auth_session_expiry", "expires_at"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    token_hash: Mapped[str] = mapped_column(
        String(64),
        nullable=False,
        unique=True,
        index=True,
    )
    user_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("auth_user.id", ondelete="CASCADE"),
        nullable=False,
    )
    expires_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    ip_address: Mapped[str | None] = mapped_column(String(64), nullable=True)
    user_agent: Mapped[str | None] = mapped_column(String(512), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime,
        nullable=False,
        server_default=func.now(),
    )