"""Chore Assignment model for many-to-many user-chore relationship."""
from sqlalchemy import Column, Integer, DateTime, ForeignKey
from sqlalchemy.orm import relationship
from datetime import datetime
from app.core.database import Base

class ChoreAssignment(Base):
    """Junction table for assigning multiple users to chores."""
    __tablename__ = "chore_assignments"
    
    id = Column(Integer, primary_key=True, index=True)
    chore_id = Column(Integer, ForeignKey("chores.id", ondelete="CASCADE"), nullable=False)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    completed_at = Column(DateTime, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    # Relationships
    chore = relationship("Chore", back_populates="assignments")
    user = relationship("User", back_populates="chore_assignments")