from datetime import datetime
from sqlalchemy import Column, Integer, String, DateTime, Text, ForeignKey, Enum
from sqlalchemy.orm import relationship
from app.db.base import Base
import enum


class MovementType(enum.Enum):
    IN = "in"
    OUT = "out"
    ADJUSTMENT = "adjustment"


class StockMovement(Base):
    __tablename__ = "stock_movements"

    id = Column(Integer, primary_key=True, index=True)
    product_id = Column(Integer, ForeignKey("products.id"), nullable=False)
    movement_type = Column(Enum(MovementType), nullable=False)
    quantity = Column(Integer, nullable=False)
    reference = Column(String(100), nullable=True)
    notes = Column(Text, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow)

    product = relationship("Product", backref="stock_movements")