from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, UniqueConstraint
from sqlalchemy.sql import func
from app.db.base import Base

class List(Base):
    __tablename__ = "lists"

    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    name = Column(String, nullable=False)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

class ListMember(Base):
    __tablename__ = "list_members"
    __table_args__ = (
        UniqueConstraint('list_id', 'contact_id', name='uq_list_contact'),
    )

    id = Column(Integer, primary_key=True, index=True)
    list_id = Column(Integer, ForeignKey("lists.id", ondelete="CASCADE"), nullable=False, index=True)
    contact_id = Column(Integer, ForeignKey("contacts.id", ondelete="CASCADE"), nullable=False, index=True)