I am getting this error when saving the card:

https://firestore.googleapis.com/google.firestore.v1.Firestore/Listen/channel?gsessionid=Da9ga26vaDS2NMMwCHc18fbJSi5FOsYDhxFGH9WDcJk&VER=8&database=projects%2Fcardex-1mapj%2Fdatabases%2F(default)&RID=rpc&SID=cHzt3lDHgQb2Z_z2VrKW2w&AID=0&CI=0&TYPE=xmlhttp&zx=l9xpcaot2kx5&t=1

src/lib/firestore.ts

@@ -1,3 +1,4 @@
+
 import {
   collection,
   addDoc,
@@ -26,18 +27,52 @@ export const addCardToCollection = async (
   userId: string,
   cardData: Omit<PokemonCard, 'id' | 'userId' | 'createdAt' | 'updatedAt'>
 ): Promise<string> => {
-  if (!userId) throw new Error('User ID is required to add a card.');
+  if (!userId) {
+    console.error("addCardToCollection: User ID is missing.");
+    throw new Error('User ID is required to add a card.');
+  }
   try {
-    const docRef = await addDoc(getPokemonCardsCollectionRef(userId), {
+    const collectionRef = getPokemonCardsCollectionRef(userId);
+    const docPayload = {
       ...cardData,
-      userId, // Ensure userId is part of the document data as well for easier querying if needed
+      userId,
       createdAt: serverTimestamp(),
       updatedAt: serverTimestamp(),
-    });
+    };
+
+    // Log information for debugging, excluding potentially very large imageDataUrl from general log
+    const payloadKeys = Object.keys(docPayload);
+    const imageDataUrlLength = docPayload.imageDataUrl ? docPayload.imageDataUrl.length : 0;
+    console.log(
+      "Attempting to add card to Firestore. Path:",
+      collectionRef.path,
+      "Payload keys:",
+      payloadKeys.join(', '),
+      "imageDataUrl length:",
+      imageDataUrlLength
+    );
+
+    if (imageDataUrlLength > 500 * 1024) { // Warn if image data is > 500KB
+      console.warn(
+        `imageDataUrl is very large (length: ${imageDataUrlLength} bytes). This might approach or exceed Firestore's 1MiB document size limit and could cause write failures. Consider storing images in Firebase Storage instead.`
+      );
+    }
+
+    const docRef = await addDoc(collectionRef, docPayload);
     return docRef.id;
   } catch (error) {
-    console.error('Error adding card to Firestore: ', error);
-    throw new Error('Failed to add card to collection.');
+    console.error('Error adding card to Firestore (full error object):', error); // Log the full error object
+    let detailedMessage = 'Failed to add card to collection.';
+    if (error instanceof Error) {
+      detailedMessage = error.message; // Start with the basic error message
+      // Attempt to access Firebase-specific error code
+      // Firebase errors often have a 'code' property, but to be safe with typing, we check its existence.
+      const firebaseError = error as any;
+      if (firebaseError.code) {
+        detailedMessage = `Error: ${firebaseError.code} - ${error.message}`;
+      }
+    }
+    throw new Error(detailedMessage); // Throw a new error with the potentially more detailed message
   }
 };