Split purchase submit from receipt finalization

src/app/api/v1/receipts/route.ts

@@ -55,11 +55,42 @@ export async function POST(request: Request) {
   const systemUser = await ensureSystemUser();
   const receiptDate = new Date(`${parsed.data.receipt_date}T00:00:00.000Z`);
   const receiptNo = await generateReceiptNo(receiptDate);
+  const purchaseId = BigInt(parsed.data.purchase_id);
+
+  const purchase = await prisma.purchase.findUnique({
+    where: { id: purchaseId },
+    include: {
+      _count: {
+        select: {
+          receipts: true,
+          lots: true
+        }
+      }
+    }
+  });
+
+  if (!purchase) {
+    return NextResponse.json({ message: "Purchase not found" }, { status: 404 });
+  }
+
+  if (purchase.status !== "SUBMITTED") {
+    return NextResponse.json(
+      { message: "Purchase harus diajukan sebelum dibuatkan receipt." },
+      { status: 409 }
+    );
+  }
+
+  if (purchase._count.receipts > 0 || purchase._count.lots > 0) {
+    return NextResponse.json(
+      { message: "Purchase sudah memiliki receipt/lot." },
+      { status: 409 }
+    );
+  }
 
   const receipt = await prisma.receipt.create({
     data: {
       receiptNo,
-      purchaseId: BigInt(parsed.data.purchase_id),
+      purchaseId,
       receiptDate,
       status: "DRAFT",
       notes: parsed.data.notes || null,