# Authentication Fix Summary

## Problem
- Backend logs show: "AUTHENTICATION ERROR: No credentials provided for authenticated endpoint: GET /api/content-planning/enhanced-strategies/"
- Frontend window reloads and redirects to home page
- Cannot capture frontend logs due to redirect loop

## Root Cause Analysis

1. **Request Interceptor Issue**: The interceptor was allowing requests to proceed even when `authTokenGetter` returned `null`, which caused requests to be sent without Authorization headers.

2. **Response Interceptor Redirect**: When backend returned 401, the response interceptor was immediately redirecting to home page, even for content-planning routes during initialization.

3. **Race Condition**: There might be a timing issue where:
   - ProtectedRoute renders the component (user appears authenticated)
   - But TokenInstaller's useEffect hasn't run yet, or
   - Token getter returns null because Clerk token isn't ready yet

## Fixes Applied

### 1. Enhanced Request Interceptor ✅

**File**: `frontend/src/api/client.ts`

**Change**: Reject requests when token getter returns `null` (not just when it's not set)

**Before**:
```typescript
if (token) {
  // Add token
} else {
  // Still proceed with request - backend will return 401
}
```

**After**:
```typescript
if (token) {
  // Add token
} else {
  // Reject request to prevent 401 errors
  return Promise.reject(new Error('Authentication token not available...'));
}
```

### 2. Prevent Redirects for Content-Planning Routes ✅

**File**: `frontend/src/api/client.ts`

**Change**: Added `isContentPlanningRoute` check to prevent redirects during initialization

**Before**:
```typescript
if (!isRootRoute && !isOnboardingRoute) {
  // Redirect to home
}
```

**After**:
```typescript
const isContentPlanningRoute = window.location.pathname.includes('/content-planning');

if (!isRootRoute && !isOnboardingRoute && !isContentPlanningRoute) {
  // Redirect to home
} else if (isContentPlanningRoute) {
  // Just log - ProtectedRoute will handle redirect if needed
  console.warn('401 Unauthorized for content-planning route - ProtectedRoute should handle this');
}
```

### 3. Aligned with Established Pattern ✅

**Files**: 
- `ContentStrategyTab.tsx`
- `ContentPlanningDashboard.tsx`

**Change**: Removed component-level auth checks, relying on ProtectedRoute (matches BlogWriter/StoryWriter pattern)

## Expected Behavior After Fix

1. **Request Interceptor**:
   - ✅ Rejects requests if `authTokenGetter` is not set
   - ✅ Rejects requests if `authTokenGetter` returns `null`
   - ✅ Only proceeds with requests that have valid tokens

2. **Response Interceptor**:
   - ✅ Prevents redirect loops for content-planning routes
   - ✅ Allows ProtectedRoute to handle authentication state
   - ✅ Still redirects for other routes on 401 (after retry fails)

3. **Components**:
   - ✅ Rely on ProtectedRoute for authentication checks
   - ✅ Make API calls directly (no redundant auth checks)
   - ✅ API interceptor handles token injection

## Testing Checklist

- [ ] Navigate to `/content-planning` when signed in
- [ ] Verify no 401 errors in backend logs
- [ ] Verify no redirect to home page
- [ ] Verify API calls include Authorization header
- [ ] Verify frontend console shows token being added to requests
- [ ] Test with slow network (to catch race conditions)
- [ ] Test navigation from main dashboard to content-planning

## Next Steps if Issue Persists

1. **Add More Logging**:
   - Log when TokenInstaller sets authTokenGetter
   - Log when request interceptor runs
   - Log token value (first few chars) to verify it's not null

2. **Check TokenInstaller Timing**:
   - Verify TokenInstaller runs before ProtectedRoute renders children
   - Consider adding a small delay or state check

3. **Verify Clerk Token Template**:
   - Check if `REACT_APP_CLERK_JWT_TEMPLATE` is set correctly
   - Verify Clerk dashboard has the JWT template configured

4. **Backend Logging**:
   - Add logging to see if Authorization header is received
   - Check if header format is correct (`Bearer <token>`)

## Status: ✅ FIXES APPLIED

All fixes have been applied. The system should now:
- Reject requests without tokens (preventing 401s)
- Not redirect content-planning routes during initialization
- Follow the same authentication pattern as other components
