models.py

from sqlalchemy import Column, Integer, String, ForeignKey, Numeric, Text, DateTime, func
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
from database import engine

Base = declarative_base()


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    email = Column(String(255), unique=True, index=True, nullable=False)
    password = Column(String(72), nullable=False)  # bcrypt is always 60 chars
    expenses = relationship("Expense", back_populates="user", cascade="all, delete-orphan")


class Expense(Base):
    __tablename__ = "expenses"

    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    name = Column(String(50), nullable=False)
    category = Column(String(100), nullable=False)
    amount = Column(Numeric(10, 2), nullable=False)   # NOT Integer — money needs decimals
    description = Column(Text, nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now(), nullable=False)
    user = relationship("User", back_populates="expenses")


Base.metadata.create_all(bind=engine)  # Keep at the bottom, after all models are defined