# Authentication Debug Steps

## Current Status

✅ **Frontend**: Token is being added to requests
- Logs show: `[apiClient] ✅ Added auth token to request: /api/content-planning/enhanced-strategies`

❌ **Backend**: Still receiving "No credentials provided"
- Logs show: `🔒 AUTHENTICATION ERROR: No credentials provided for authenticated endpoint: GET /api/content-planning/enhanced-strategies/`

## Root Cause Hypothesis

The Authorization header is being added in the frontend interceptor, but it's either:
1. Not reaching the backend (CORS issue?)
2. Not being extracted by FastAPI's `HTTPBearer` dependency
3. Being stripped by some middleware

## Debugging Added

### 1. Enhanced Backend Logging ✅

**File**: `backend/middleware/auth_middleware.py`

**Added**:
- Logs `auth_header_received=YES/NO` to see if header reaches backend
- Logs `auth_header_value=...` to see the actual header value (first 50 chars)
- Logs `all_headers=[...]` to see all received headers
- **Manual token extraction fallback** - if header is present but HTTPBearer didn't extract it, manually extract and verify

### 2. Manual Token Extraction ✅

If the Authorization header is present but `HTTPBearer` doesn't extract it (bug in FastAPI dependency), the code now:
1. Manually extracts the token from the `Authorization` header
2. Verifies it with Clerk
3. Returns the user if valid

This should work even if HTTPBearer has an issue.

## Next Steps to Debug

### Step 1: Restart Backend
The enhanced logging won't show until the backend is restarted:
```bash
# Restart your backend server
```

### Step 2: Check Backend Logs
After restarting, navigate to `/content-planning` and check backend logs. You should now see:
- `auth_header_received=YES` or `NO`
- `auth_header_value=Bearer eyJ...` or `None`
- `all_headers=[...]` showing all headers

### Step 3: If Header is Present But HTTPBearer Didn't Extract
You should see:
```
⚠️ WARNING: Authorization header received but HTTPBearer didn't extract it. Trying manual extraction...
✅ Manual token extraction successful for endpoint: GET /api/content-planning/enhanced-strategies/
```

This means the manual fallback worked, and the request should succeed.

### Step 4: If Header is NOT Present
If logs show `auth_header_received=NO`, then:
1. Check browser Network tab - does the request have `Authorization: Bearer ...` header?
2. Check CORS configuration - is `Authorization` header allowed?
3. Check if any middleware is stripping the header

## CORS Configuration Check

**File**: `backend/app.py`

Current CORS config:
```python
app.add_middleware(
    CORSMiddleware,
    allow_origins=allowed_origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],  # This should allow Authorization header
)
```

`allow_headers=["*"]` should allow all headers including `Authorization`. This is correct.

## Expected Behavior After Fix

1. **Frontend adds token** → `[apiClient] ✅ Added auth token to request`
2. **Backend receives header** → `auth_header_received=YES`
3. **HTTPBearer extracts it** → Request succeeds
   - **OR** Manual extraction kicks in → `✅ Manual token extraction successful`

## If Manual Extraction Works

If manual extraction works but HTTPBearer doesn't, it suggests a bug in FastAPI's HTTPBearer dependency. The manual fallback will handle this, but we should investigate why HTTPBearer isn't working.

Possible causes:
- FastAPI version incompatibility
- HTTPBearer configuration issue (`auto_error=False` might be causing issues)
- Case sensitivity in header name (HTTPBearer expects lowercase `authorization`)

## Status: ⚠️ PENDING BACKEND RESTART

The fixes are in place, but need backend restart to see the enhanced logging and manual extraction in action.
