integrate with exsited utils

Author: MarcoWang3

packages/amazonq/src/lsp/chat/autoDebug/shared/diagnosticUtils.ts

@@ -4,19 +4,30 @@
  */
 
 import * as vscode from 'vscode'
+import { toIdeDiagnostics } from 'aws-core-vscode/codewhisperer'
 
 /**
  * Maps VSCode DiagnosticSeverity to string representation
+ * Reuses the existing toIdeDiagnostics logic but returns lowercase format expected by Problem interface
  */
 export function mapDiagnosticSeverity(severity: vscode.DiagnosticSeverity): 'error' | 'warning' | 'info' | 'hint' {
-    switch (severity) {
-        case vscode.DiagnosticSeverity.Error:
+    // Create a minimal diagnostic to use with toIdeDiagnostics
+    const tempDiagnostic: vscode.Diagnostic = {
+        range: new vscode.Range(0, 0, 0, 0),
+        message: '',
+        severity: severity,
+    }
+
+    const ideDiagnostic = toIdeDiagnostics(tempDiagnostic)
+    // Convert uppercase severity to lowercase format expected by Problem interface
+    switch (ideDiagnostic.severity) {
+        case 'ERROR':
             return 'error'
-        case vscode.DiagnosticSeverity.Warning:
+        case 'WARNING':
             return 'warning'
-        case vscode.DiagnosticSeverity.Information:
+        case 'INFORMATION':
             return 'info'
-        case vscode.DiagnosticSeverity.Hint:
+        case 'HINT':
             return 'hint'
         default:
             return 'error'