import uuid

from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, Boolean
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from app.database import Base


class Session(Base):
    __tablename__ = "sessions"

    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    token = Column(String, unique=True, index=True, nullable=False)
    expires_at = Column(DateTime(timezone=True), nullable=False)
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())

    user = relationship("User", back_populates="sessions")