"""User SQLAlchemy model."""
from sqlalchemy import Column, Integer, String
from sqlalchemy.orm import relationship
from backend.database import Base


class User(Base):
    """User model for authentication and ownership."""
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String, unique=True, index=True)
    hashed_password = Column(String)

    challenges = relationship("Challenge", back_populates="owner")
    health_metrics = relationship("DailyHealthMetrics", back_populates="user")
    workouts = relationship("WorkoutSession", back_populates="user")