from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Index, Integer, String, Text, UniqueConstraint
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.database import Base


class BillNote(Base):
    __tablename__ = "bill_notes"

    id = Column(Integer, primary_key=True, autoincrement=True)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    bill_id = Column(String, ForeignKey("bills.bill_id", ondelete="CASCADE"), nullable=False)
    content = Column(Text, nullable=False)
    pinned = Column(Boolean, nullable=False, default=False)
    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="bill_notes")
    bill = relationship("Bill", back_populates="notes")

    __table_args__ = (
        UniqueConstraint("user_id", "bill_id", name="uq_bill_notes_user_bill"),
        Index("ix_bill_notes_user_id", "user_id"),
        Index("ix_bill_notes_bill_id", "bill_id"),
    )