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


class Product(Base):
    __tablename__ = "products"

    id = Column(Integer, primary_key=True, index=True)
    name = Column(String(200), nullable=False, index=True)
    sku = Column(String(50), unique=True, nullable=False, index=True)
    description = Column(Text, nullable=True)
    price = Column(Float, nullable=False)
    cost = Column(Float, nullable=True)
    quantity_in_stock = Column(Integer, default=0)
    minimum_stock_level = Column(Integer, default=0)
    category_id = Column(Integer, ForeignKey("categories.id"), nullable=True)
    supplier_id = Column(Integer, ForeignKey("suppliers.id"), nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    category = relationship("Category", backref="products")
    supplier = relationship("Supplier", backref="products")