from fastapi_users_db_sqlalchemy import GUID
from sqlalchemy import Column, Integer, String, Float, ForeignKey
from sqlalchemy.orm import relationship
from app.core.base import Base
from app.models.categories import association_table


class Transaction(Base):
    __tablename__ = "transaction"
    id = Column(Integer, primary_key=True, autoincrement=True)
    amount = Column(Float, nullable=False)
    description = Column(String(length=255), nullable=True)
    user_id = Column(GUID, ForeignKey("user.id"), nullable=False)

    # Relationship
    user = relationship("User", back_populates="transactions")
    categories = relationship("Category", secondary=association_table, back_populates="transactions")