from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, String, func
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from app.db.base_class import Base


class UserLoginSession(Base):
    """Server-side login activity record without storing credentials or raw IPs."""

    __tablename__ = "user_login_sessions"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True)
    user_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    client_type: Mapped[str] = mapped_column(String(16), nullable=False, default="web")
    client_platform: Mapped[str | None] = mapped_column(String(32), nullable=True)
    client_version: Mapped[str | None] = mapped_column(String(64), nullable=True)
    client_source: Mapped[str | None] = mapped_column(String(32), nullable=True)
    login_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
    last_seen_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
    ended_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    end_reason: Mapped[str | None] = mapped_column(String(32), nullable=True)