From d2567e158c9dbefac621f6f4c18dd7c1a28601e6 Mon Sep 17 00:00:00 2001
From: Nils-Johan Gynther <nils-johan.gynther@neoleaf.se>
Date: Sat, 2 May 2026 20:31:07 +0200
Subject: [PATCH] fix(receipt-import): classify vispgradde under dairy
 matlagning rules

---
 .../receipt-import/receipt-import.service.ts  | 89 ++++++++++++++++---
 1 file changed, 76 insertions(+), 13 deletions(-)

diff --git a/backend/src/receipt-import/receipt-import.service.ts b/backend/src/receipt-import/receipt-import.service.ts
index 7bfd25bf..848ccebb 100644
--- a/backend/src/receipt-import/receipt-import.service.ts
+++ b/backend/src/receipt-import/receipt-import.service.ts
@@ -464,6 +464,31 @@ export class ReceiptImportService {
       if (hit) return hit;
     }
 
+    // ── Regel: Grädde/matlagningsgrädde (icke-allergi) ─────────────────
+    const hasCreamSignal =
+      /\bvispgradde\b/.test(normalized) ||
+      /\bmatlagningsgradde\b/.test(normalized) ||
+      /\bgradde\b/.test(normalized) ||
+      /\bcreme\s+fraiche\b/.test(normalized) ||
+      /\bgraddfil\b/.test(normalized);
+
+    const hasPlantOrAllergySignal =
+      /\blaktosfri\b/.test(normalized) ||
+      /\bvegetabilisk\b/.test(normalized) ||
+      /\bhavre\b/.test(normalized) ||
+      /\bsoja\b/.test(normalized) ||
+      /\brisdryck\b/.test(normalized) ||
+      /\bplant\b/.test(normalized);
+
+    if (hasCreamSignal && !hasPlantOrAllergySignal) {
+      const l2CookingDairy = findCategory({
+        name: 'matlagning',
+        startsWith: 'mejeri, ost & ägg > ',
+      });
+      const hit = toSuggestion(l2CookingDairy, 'high');
+      if (hit) return hit;
+    }
+
     // ── Regel: Te ────────────────────────────────────────────────────────
     const isTea =
       /\bte\b/.test(normalized) ||
@@ -583,28 +608,66 @@ export class ReceiptImportService {
       /\bkarr[eé]\b/.test(normalized) ||
       /\bkotlett\b/.test(normalized);
 
-    if (!hasPorkSignal) return suggestion;
+    if (hasPorkSignal) {
+      const aiPath = suggestion.path.toLowerCase();
+      const isClearlyWrongBranch =
+        aiPath.includes('köttbullar & färsprodukter') || aiPath.includes('köttfärs');
+
+      if (!isClearlyWrongBranch) return suggestion;
+
+      const l3Pork = categories.find(
+        (c) =>
+          c.name.toLowerCase() === 'fläsk' &&
+          c.path.toLowerCase().startsWith('kött, chark & fågel > kött > '),
+      );
+      if (!l3Pork) return suggestion;
+
+      this.logger.log(
+        `AI contradiction-guard: "${rawName}" remappas från "${suggestion.path}" till "${l3Pork.path}"`,
+      );
+      return {
+        categoryId: l3Pork.id,
+        categoryName: l3Pork.name,
+        path: l3Pork.path,
+        confidence: 'high',
+        usedFallback: true,
+      };
+    }
+
+    const hasCreamSignal =
+      /\bvispgradde\b/.test(normalized) ||
+      /\bmatlagningsgradde\b/.test(normalized) ||
+      /\bgradde\b/.test(normalized) ||
+      /\bcreme\s+fraiche\b/.test(normalized) ||
+      /\bgraddfil\b/.test(normalized);
+    const hasPlantOrAllergySignal =
+      /\blaktosfri\b/.test(normalized) ||
+      /\bvegetabilisk\b/.test(normalized) ||
+      /\bhavre\b/.test(normalized) ||
+      /\bsoja\b/.test(normalized) ||
+      /\brisdryck\b/.test(normalized) ||
+      /\bplant\b/.test(normalized);
+
+    if (!hasCreamSignal || hasPlantOrAllergySignal) return suggestion;
 
     const aiPath = suggestion.path.toLowerCase();
-    const isClearlyWrongBranch =
-      aiPath.includes('köttbullar & färsprodukter') || aiPath.includes('köttfärs');
+    const isOutsideDairy = !aiPath.startsWith('mejeri, ost & ägg > matlagning');
+    if (!isOutsideDairy) return suggestion;
 
-    if (!isClearlyWrongBranch) return suggestion;
-
-    const l3Pork = categories.find(
+    const l2CookingDairy = categories.find(
       (c) =>
-        c.name.toLowerCase() === 'fläsk' &&
-        c.path.toLowerCase().startsWith('kött, chark & fågel > kött > '),
+        c.name.toLowerCase() === 'matlagning' &&
+        c.path.toLowerCase() === 'mejeri, ost & ägg > matlagning',
     );
-    if (!l3Pork) return suggestion;
+    if (!l2CookingDairy) return suggestion;
 
     this.logger.log(
-      `AI contradiction-guard: "${rawName}" remappas från "${suggestion.path}" till "${l3Pork.path}"`,
+      `AI contradiction-guard: "${rawName}" remappas från "${suggestion.path}" till "${l2CookingDairy.path}"`,
     );
     return {
-      categoryId: l3Pork.id,
-      categoryName: l3Pork.name,
-      path: l3Pork.path,
+      categoryId: l2CookingDairy.id,
+      categoryName: l2CookingDairy.name,
+      path: l2CookingDairy.path,
       confidence: 'high',
       usedFallback: true,
     };