Update 7project/frontend/src/pages/MockBankModal.tsx

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

7project/frontend/src/pages/MockBankModal.tsx

@@ -32,19 +32,39 @@ export default function MockBankModal({ isOpen, isGenerating, categories, onClos
   if (!isOpen) return null;
 
   function handleGenerateClick() {
+    const parsedCount = parseInt(count, 10);
+    const parsedMinAmount = parseFloat(minAmount);
+    const parsedMaxAmount = parseFloat(maxAmount);
+    const parsedStartDate = new Date(startDate);
+    const parsedEndDate = new Date(endDate);
+
+    // Validation
+    if (
+      isNaN(parsedCount) || parsedCount <= 0 ||
+      isNaN(parsedMinAmount) || isNaN(parsedMaxAmount) ||
+      parsedMaxAmount < parsedMinAmount ||
+      isNaN(parsedStartDate.getTime()) || isNaN(parsedEndDate.getTime()) ||
+      parsedEndDate < parsedStartDate
+    ) {
+      alert(
+        "Please ensure:\n" +
+        "- Count is a positive number\n" +
+        "- Min and Max Amount are valid numbers, and Max >= Min\n" +
+        "- Start and End Date are valid, and End Date >= Start Date"
+      );
+      return;
+    }
+
     const options: MockGenerationOptions = {
-      count: parseInt(count, 10),
+      count: parsedCount,
-      minAmount: parseFloat(minAmount),
+      minAmount: parsedMinAmount,
-      maxAmount: parseFloat(maxAmount),
+      maxAmount: parsedMaxAmount,
       startDate,
       endDate,
       categoryIds: selectedCategoryIds.map(Number),
     };
 
-    // Basic validation
+    onGenerate(options);
-    if (!isNaN(options.count) && options.count > 0) {
-      onGenerate(options);
-    }
   }
 
   return (