nextjs-rewrite (#5)

Reviewed-on: #5
Co-authored-by: David Gwilliam <dhgwilliam@gmail.com>
Co-committed-by: David Gwilliam <dhgwilliam@gmail.com>

src/lib/auth-client.ts

@@ -0,0 +1,20 @@
+import { createAuthClient } from "better-auth/client";
+
+// Get base URL from environment or use localhost as fallback
+const getBaseURL = () => {
+  if (typeof window === 'undefined') {
+    return process.env.BETTER_AUTH_URL || "http://localhost:3000";
+  }
+  
+  // For client-side, use the current origin but allow localhost variations
+  const origin = window.location.origin;
+  if (origin.includes('localhost') || origin.includes('127.0.0.1') || origin.includes('0.0.0.0')) {
+    return "http://localhost:3000"; // Normalize to localhost for Better Auth
+  }
+  
+  return origin;
+};
+
+export const authClient = createAuthClient({
+  baseURL: getBaseURL(),
+});