v1.2 scaffold

backend/app/api/products.py

@@ -0,0 +1,88 @@
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from app.db.session import get_db
+from app.models.mix import Mix
+from app.models.product import Product
+from app.schemas.product import ProductCostBreakdown, ProductCreate, ProductRead, ProductUpdate
+from app.services.costing_engine import calculate_product_cost
+
+router = APIRouter(prefix="/api/products", tags=["products"])
+
+
+def _serialize_product(product: Product) -> dict:
+    return {
+        "id": product.id,
+        "tenant_id": product.tenant_id,
+        "client_name": product.client_name,
+        "item_id": product.item_id,
+        "name": product.name,
+        "mix_id": product.mix_id,
+        "mix_name": product.mix.name if product.mix else "",
+        "sale_type": product.sale_type,
+        "own_bag": product.own_bag,
+        "unit_of_measure": product.unit_of_measure,
+        "items_per_pallet": product.items_per_pallet,
+        "bagging_process": product.bagging_process,
+        "distributor_margin": product.distributor_margin,
+        "wholesale_margin": product.wholesale_margin,
+        "notes": product.notes,
+        "created_at": product.created_at,
+    }
+
+
+@router.get("", response_model=list[ProductRead])
+def list_products(db: Session = Depends(get_db)):
+    products = db.scalars(select(Product).order_by(Product.name)).all()
+    return [_serialize_product(product) for product in products]
+
+
+@router.post("", response_model=ProductRead, status_code=status.HTTP_201_CREATED)
+def create_product(payload: ProductCreate, db: Session = Depends(get_db)):
+    if db.scalar(select(Mix.id).where(Mix.id == payload.mix_id)) is None:
+        raise HTTPException(status_code=404, detail="Mix not found")
+    product = Product(**payload.model_dump())
+    db.add(product)
+    db.commit()
+    db.refresh(product)
+    return _serialize_product(product)
+
+
+@router.get("/{product_id}", response_model=ProductRead)
+def get_product(product_id: int, db: Session = Depends(get_db)):
+    product = db.scalar(select(Product).where(Product.id == product_id))
+    if product is None:
+        raise HTTPException(status_code=404, detail="Product not found")
+    return _serialize_product(product)
+
+
+@router.patch("/{product_id}", response_model=ProductRead)
+def update_product(product_id: int, payload: ProductUpdate, db: Session = Depends(get_db)):
+    product = db.scalar(select(Product).where(Product.id == product_id))
+    if product is None:
+        raise HTTPException(status_code=404, detail="Product not found")
+    if payload.mix_id is not None and db.scalar(select(Mix.id).where(Mix.id == payload.mix_id)) is None:
+        raise HTTPException(status_code=404, detail="Mix not found")
+    for field, value in payload.model_dump(exclude_unset=True).items():
+        setattr(product, field, value)
+    db.commit()
+    db.refresh(product)
+    return _serialize_product(product)
+
+
+@router.get("/{product_id}/cost-breakdown", response_model=ProductCostBreakdown)
+def get_product_cost_breakdown(product_id: int, db: Session = Depends(get_db)):
+    try:
+        return calculate_product_cost(db, product_id)
+    except ValueError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+
+
+@router.get("/{product_id}/price-output", response_model=ProductCostBreakdown)
+def get_product_price_output(product_id: int, db: Session = Depends(get_db)):
+    try:
+        return calculate_product_cost(db, product_id)
+    except ValueError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+