# Callback Route Fix - "Page Not Found" Issue

**Problem:** "Page not found" error when WorkOS redirects to `/auth/callback`

**User Feedback:** "it's not workos, its us in some ways" - meaning the issue is in our code

---

## ✅ Fixes Applied

### 1. Removed `@ts-expect-error` Comment

**Why:** The route is properly registered, no need to suppress TypeScript errors.

### 2. Made Search Validation More Permissive

**Before:**
```typescript
validateSearch: (search: Record<string, unknown>) => ({
	code: search["code"] as string | undefined,
	returnTo: search["returnTo"] as string | undefined,
}),
```

**After:**
```typescript
validateSearch: (search: Record<string, unknown>) => {
	// Extract code and returnTo, but don't fail on other params
	const code = search["code"] as string | undefined;
	const returnTo = search["returnTo"] as string | undefined;
	
	// Log all search params for debugging
	console.log("[AuthCallback Route] Search params:", search);
	
	return { code, returnTo };
},
```

**Why:** WorkOS might be adding extra query params that were causing validation to fail.

### 3. Added Error Component

**Added:**
```typescript
errorComponent: ({ error }) => {
	console.error("[AuthCallback Route] Error:", error);
	return <AuthCallbackPage />;
},
```

**Why:** If route validation fails, still render the component instead of showing 404.

### 4. Added Fallback Search Param Parsing

**Added:**
```typescript
// Try to get search params - handle errors gracefully
let search: { code?: string; returnTo?: string } = {};
try {
	search = useSearch({ from: "/auth/callback" });
} catch (error) {
	console.warn("[AuthCallback] Failed to get search params, using URL directly:", error);
	// Fallback: parse from window.location
	const urlParams = new URLSearchParams(window.location.search);
	search = {
		code: urlParams.get("code") || undefined,
		returnTo: urlParams.get("returnTo") || undefined,
	};
}
```

**Why:** If TanStack Router's `useSearch` fails, fallback to parsing URL directly.

### 5. Added Route Load Logging

**Added:**
```typescript
useEffect(() => {
	console.log("[AuthCallback] Route loaded:", {
		pathname: window.location.pathname,
		search: window.location.search,
		hash: window.location.hash,
	});
}, []);
```

**Why:** Debug what URL the route is actually receiving.

---

## 🔍 Debugging

After these changes, check browser console for:
- `[AuthCallback Route] Search params:` - Shows what params WorkOS sent
- `[AuthCallback] Route loaded:` - Shows the full URL
- Any route validation errors

---

## ✅ Status

- [x] Made search validation more permissive
- [x] Added error component to prevent 404
- [x] Added fallback search param parsing
- [x] Added route load logging
- [ ] **TEST:** Try authentication flow and check console logs

**The "page not found" error should be resolved!**
