from sqlalchemy import (
    Boolean,
    Column,
    DateTime,
    Float,
    ForeignKey,
    Integer,
    String,
    Text,
)
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.db.base import Base


class Product(Base):
    __tablename__ = "products"

    id = Column(String, primary_key=True, index=True)
    name = Column(String, index=True, nullable=False)
    description = Column(Text, nullable=True)
    sku = Column(String, unique=True, index=True, nullable=True)
    barcode = Column(String, unique=True, index=True, nullable=True)
    price = Column(Float, nullable=False, default=0.0)
    cost_price = Column(Float, nullable=True)
    current_stock = Column(Integer, nullable=False, default=0)
    min_stock_level = Column(Integer, nullable=True)
    max_stock_level = Column(Integer, nullable=True)
    is_active = Column(Boolean, default=True)
    category_id = Column(String, ForeignKey("categories.id"), nullable=True)
    supplier_id = Column(String, ForeignKey("suppliers.id"), nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    # Relationships
    category = relationship("Category", back_populates="products")
    supplier = relationship("Supplier", back_populates="products")
    inventory_movements = relationship("InventoryMovement", back_populates="product")