fix(sdk): summarize sdk component crashes with stage index errors (#50400)

* use -1 for stage index for breakout and aggregation list

* add e2e tests

* remove sum of total in e2e

* use test id matcher

* add issue to e2e name

Co-authored-by: Kamil Mielnik <kamil@kamilmielnik.com>

* move stageIndex to a separate variable

---------

Co-authored-by: Kamil Mielnik <kamil@kamilmielnik.com>

e2e/test/scenarios/embedding-sdk/interactive-question.cy.spec.ts

@@ -173,4 +173,24 @@ describeSDK("scenarios > embedding-sdk > interactive-question", () => {
     getSdkRoot().contains("onBeforeSave is called");
     getSdkRoot().contains("question saved as Sample Orders 4");
   });
+
+  it("should not crash when clicking on Summarize (metabase#50398)", () => {
+    visitInteractiveQuestionStory();
+
+    cy.wait("@cardQuery").then(({ response }) => {
+      expect(response?.statusCode).to.equal(202);
+    });
+
+    getSdkRoot().within(() => {
+      // Open the default summarization view in the sdk
+      cy.findByText("Summarize").click();
+
+      // Expect the default summarization view to be there.
+      cy.findByTestId("summarize-aggregation-item-list").should("be.visible");
+    });
+
+    cy.on("uncaught:exception", error => {
+      expect(error.message.includes("Stage 1 does not exist")).to.be.false;
+    });
+  });
 });

enterprise/frontend/src/embedding-sdk/components/private/InteractiveQuestion/components/Summarize.tsx

@@ -38,9 +38,6 @@ const SummarizeInner = ({
 
   const [currentQuery, setCurrentQuery] = useState<Lib.Query>(question.query());
 
-  // yeah we need to change this
-  const stageIndex = Lib.stageCount(currentQuery);
-
   const onApplyFilter = () => {
     if (currentQuery) {
       onQueryChange(currentQuery);
@@ -55,6 +52,7 @@ const SummarizeInner = ({
     onClose();
   };
 
+  const stageIndex = -1;
   const hasAggregations = Lib.aggregations(currentQuery, stageIndex).length > 0;
 
   return (