major refactoring adding vendor and customer features

models/database/product.py

@@ -1,13 +1,12 @@
+# models/database/product.py
 from datetime import datetime
-
-from sqlalchemy import (Boolean, Column, DateTime, Float, ForeignKey, Index,
-                        Integer, String, Text, UniqueConstraint)
+from sqlalchemy import Boolean, Column, Float, ForeignKey, Index, Integer, String, UniqueConstraint
 from sqlalchemy.orm import relationship
 
-# Import Base from the central database module instead of creating a new one
 from app.core.database import Base
 from models.database.base import TimestampMixin
 
+
 class Product(Base, TimestampMixin):
     __tablename__ = "products"
 
@@ -15,12 +14,12 @@ class Product(Base, TimestampMixin):
     vendor_id = Column(Integer, ForeignKey("vendors.id"), nullable=False)
     marketplace_product_id = Column(Integer, ForeignKey("marketplace_products.id"), nullable=False)
 
-    # Vendor-specific overrides (can override the main product data)
-    product_id = Column(String)  # Vendor's internal product ID
-    price = Column(Float)  # Override main product price
+    # Vendor-specific overrides
+    product_id = Column(String)  # Vendor's internal SKU
+    price = Column(Float)
     sale_price = Column(Float)
     currency = Column(String)
-    availability = Column(String)  # Override availability
+    availability = Column(String)
     condition = Column(String)
 
     # Vendor-specific metadata
@@ -28,13 +27,14 @@ class Product(Base, TimestampMixin):
     is_active = Column(Boolean, default=True)
     display_order = Column(Integer, default=0)
 
-    # Inventory management
+    # Inventory settings
     min_quantity = Column(Integer, default=1)
     max_quantity = Column(Integer)
 
     # Relationships
-    vendor = relationship("Vendor", back_populates="product")
+    vendor = relationship("Vendor", back_populates="products")
     marketplace_product = relationship("MarketplaceProduct", back_populates="product")
+    inventory_entries = relationship("Inventory", back_populates="product", cascade="all, delete-orphan")
 
     # Constraints
     __table_args__ = (
@@ -42,3 +42,16 @@ class Product(Base, TimestampMixin):
         Index("idx_product_active", "vendor_id", "is_active"),
         Index("idx_product_featured", "vendor_id", "is_featured"),
     )
+
+    def __repr__(self):
+        return f"<Product(id={self.id}, vendor_id={self.vendor_id}, product_id='{self.product_id}')>"
+
+    @property
+    def total_inventory(self):
+        """Calculate total inventory across all locations."""
+        return sum(inv.quantity for inv in self.inventory_entries)
+
+    @property
+    def available_inventory(self):
+        """Calculate available inventory (total - reserved)."""
+        return sum(inv.available_quantity for inv in self.inventory_entries)