Add Total Stock Value Report documentation for SSMM

Care/Accounting/total_stock_value_report_ssmm.md

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+
+# Total Stock Value Report - SSMM
+
+> Net stock quantity and total purchase value per stock item, as of a given date.
+
+## Purpose
+
+Computes the current on-hand stock value for each stock item at SSMM as of a chosen date. It does this by:
+
+1. Summing everything **purchased** (received via external supply deliveries) up to that date.
+2. Subtracting everything **dispensed** to patients up to that date.
+3. Subtracting **mistake adjustments** — stock moved into a configured set of "mistake / correction" destination locations, treated as outflow.
+
+The result is the **net quantity** and **net purchase value** of stock remaining per item.
+
+## Parameters
+
+| Parameter | Type | Description | Example |
+|-----------|------|-------------|---------|
+| `selected_date` | DATE | As-of date for the report. All purchases, dispenses, and mistake entries up to and including this date are considered. | `'2026-05-31'` |
+
+---
+
+## Query
+
+```sql
+WITH purchase_items AS (
+    SELECT 
+        epk.name AS stock_name,
+        SUM(esd.supplied_item_quantity) AS qty,
+        SUM(ep.purchase_price * esd.supplied_item_quantity) AS total_value
+    FROM emr_supplydelivery esd
+    LEFT JOIN emr_deliveryorder edo ON esd.order_id = edo.id
+    LEFT JOIN emr_product ep ON esd.supplied_item_id = ep.id
+    LEFT JOIN emr_productknowledge epk ON ep.product_knowledge_id = epk.id
+    WHERE esd.status = 'completed'
+      AND edo.origin_id IS NULL
+      AND ep.purchase_price IS NOT NULL
+      --AND DATE(esd.created_date) <= {{selected_date}}
+    GROUP BY epk.name
+),
+
+dispense_items AS (
+    SELECT 
+        epk.name AS stock_name,
+        SUM(emd.quantity) AS qty,
+        SUM(ep.purchase_price * emd.quantity) AS total_value
+    FROM emr_medicationdispense emd
+    LEFT JOIN emr_inventoryitem eii ON eii.id = emd.item_id
+    LEFT JOIN emr_product ep ON eii.product_id = ep.id
+    LEFT JOIN emr_productknowledge epk ON ep.product_knowledge_id = epk.id
+    WHERE  emd.status IN ('completed', 'in_progress', 'preparation')
+      AND ep.purchase_price IS NOT NULL
+      --AND DATE(emd.created_date) <= {{selected_date}}
+    GROUP BY epk.name
+),
+
+mistake_items AS (
+    SELECT 
+        epk.name AS stock_name,
+        SUM(esd.supplied_item_quantity) AS qty,
+        SUM(ep.purchase_price * esd.supplied_item_quantity) AS total_value
+    FROM emr_supplydelivery esd
+    LEFT JOIN emr_deliveryorder edo ON esd.order_id = edo.id
+    LEFT JOIN emr_inventoryitem eii ON esd.supplied_inventory_item_id = eii.id
+    LEFT JOIN emr_product ep ON eii.product_id = ep.id
+    LEFT JOIN emr_productknowledge epk ON ep.product_knowledge_id = epk.id
+    WHERE esd.status IN ('completed', 'in_progress')
+      AND edo.destination_id IN (264,270,280,274,273,275,276,266,279,36,265,278,297,238,298,27,481,17,32,277)
+      AND ep.purchase_price IS NOT NULL
+      --AND DATE(esd.created_date) <= {{selected_date}}
+    GROUP BY epk.name
+)
+
+SELECT 
+    COALESCE(p.stock_name, d.stock_name, m.stock_name) AS stock_name,
+    COALESCE(p.qty, 0) - COALESCE(d.qty, 0) - COALESCE(m.qty, 0) AS net_qty,
+    COALESCE(p.total_value, 0) - COALESCE(d.total_value, 0) - COALESCE(m.total_value, 0) AS net_value
+FROM purchase_items p
+FULL OUTER JOIN dispense_items d ON p.stock_name = d.stock_name
+FULL OUTER JOIN mistake_items m ON COALESCE(p.stock_name, d.stock_name) = m.stock_name
+ORDER BY stock_name;
+```
+
+
+## Notes
+
+- **`purchase_items` CTE** — external purchases only. Uses `edo.origin_id IS NULL` to filter to supply deliveries that originate from outside the facility
+- **`dispense_items` CTE** — outflow via medication dispenses to patients. Includes dispenses in `completed / in_progress / preparation` to match what reduces stock in practice.
+- **`mistake_items` CTE** — supply deliveries whose destination is one of the configured "mistake / correction" locations. These represent stock moved out for adjustments and is treated as outflow.
+- **Hardcoded values:**
+  - `edo.destination_id IN (264,270,280,274,273,275,276,266,279,36,265,278,297,238,298,27,481,17,32,277)` — the list of "mistake / correction" destination locations. Update this list whenever new mistake/correction locations are added or old ones are retired.
+
+*Last updated: 2026-05-22*
+
+
+