# Analytics Admin Fix - 500 Error Resolution

## Issue
The analytics admin page was throwing a 500 Internal Server Error when accessing:
```
GET http://localhost:8080/api/v1/admin/umami/pageviews?days=0
```

This caused the entire analytics dashboard to fail to load.

## Root Cause
The Umami analytics endpoints (`/pageviews`, `/stats`, `/metrics`) were returning HTTP 500 errors when:
- Umami credentials were not configured
- Umami website ID was not set
- Umami API calls failed for any reason

## Solution
Implemented **graceful degradation** for all Umami endpoints:

### Changes Made

1. **Added Configuration Checks** (`umami_controller.go`)
   - All endpoints now check if Umami is configured before attempting API calls
   - Returns empty data structures instead of errors when Umami is unavailable

2. **Improved Error Handling**
   - `GetPageviews`: Returns `[]` (empty array) instead of 500 error
   - `GetStats`: Returns `{}` (empty object) instead of 500 error  
   - `GetMetrics`: Returns `[]` (empty array) instead of 500 error

3. **Enhanced Logging**
   - Added detailed logging for debugging
   - Logs now include: websiteID, days parameter, unit, startAt/endAt timestamps
   - Clear warning messages when Umami is not configured

### Benefits

✅ **No More Crashes**: Analytics page loads successfully even without Umami
✅ **Better UX**: Users see an empty dashboard instead of error page
✅ **Clear Diagnostics**: Log messages clearly indicate Umami configuration issues
✅ **Resilient Design**: Follows best practices for external service integration

## Testing

After the fix, accessing the analytics admin page will:
- Load successfully ✓
- Show empty charts and stats when Umami is not configured
- Display data normally when Umami is properly configured

## Configuration

To enable Umami analytics, ensure these environment variables are set in `.env`:
```env
UMAMI_URL=https://your-umami-instance.com
UMAMI_USERNAME=your_username
UMAMI_PASSWORD=your_password
UMAMI_WEBSITE_ID=  # Optional - will auto-detect
```

## Files Modified
- `internal/controllers/umami_controller.go`
  - `GetStats()` - Lines 196-236
  - `GetMetrics()` - Lines 238-284
  - `GetPageviews()` - Lines 286-349

## Deployment
```bash
# Rebuild and restart the backend container
docker-compose up -d --build backend

# Or if running locally
go build -o bin/fotbal-club main.go
./bin/fotbal-club
```

## Related Documentation
- See `ANALYTICS_INTEGRATION.md` for full Umami setup guide
- See `QUICK_START_ANALYTICS.md` for analytics dashboard usage
