# ✅ RAG Backend Integration - COMPLETE
## Summary
Successfully integrated FastAPI RAG backend into React frontend. All pages, routes, and navigation are implemented and tested.
## ✅ Completed Tasks
### 1. Environment Configuration ✅
- ✅ Added `VITE_RAG_API_URL` to `.env.example`
- ✅ Default: `http://localhost:8000`
- ✅ Documentation updated
### 2. API Client ✅
- ✅ Created `src/api/ragClient.ts`
- ✅ Axios with auto JWT attachment
- ✅ 401 → logout + redirect
- ✅ 402 → quota exceeded handling
- ✅ Typed responses
- ✅ JWT decoding for tenant_id/user_id
### 3. Pages Created ✅
#### A) RAG Knowledge Base Page (`/rag/knowledge-base`)
- ✅ File upload (drag & drop + browse)
- ✅ File validation (type + size)
- ✅ Success/failure toasts
- ✅ KB stats display
- ✅ KB ID selector (dev mode only)
- ✅ Empty states
#### B) Retrieval Test Page (`/rag/retrieval`)
- ✅ Query input
- ✅ Calls `POST /kb/search`
- ✅ Displays chunks with:
- Similarity scores (visual bars)
- File names
- Page numbers
- Expandable previews
- Chunk IDs
#### C) Live Chat Test Page (`/rag/chat`)
- ✅ Updated to use RAG backend
- ✅ RAGChatInterface component
- ✅ Shows answer, confidence, citations
- ✅ Refusal UI states
- ✅ Loading states
- ✅ Error handling
#### D) Billing/Usage Page (`/rag/billing`)
- ✅ Calls `GET /billing/limits` and `GET /billing/usage`
- ✅ Monthly quota progress bar
- ✅ Used chats/tokens display
- ✅ Estimated cost
- ✅ Provider/model breakdown
- ✅ 402 → upgrade banner
### 4. Navigation ✅
- ✅ Sidebar updated with RAG pages
- ✅ All routes reachable
### 5. Multi-Tenant Security ✅
- ✅ `tenantId` from JWT only (never user input)
- ✅ KB ID selector only in dev mode
- ✅ Auth context enforced
### 6. UX Standards ✅
- ✅ Radix UI components
- ✅ Toast notifications
- ✅ Loading states
- ✅ Empty states
- ✅ Error handling
## Files Created
1. `src/api/ragClient.ts` - RAG API client
2. `src/hooks/useToast.ts` - Toast hook
3. `src/components/ToastContainer.tsx` - Toast provider
4. `src/components/RAGChatInterface.tsx` - RAG chat component
5. `src/pages/tenant/RAGKnowledgeBase.tsx` - KB upload page
6. `src/pages/tenant/RetrievalTest.tsx` - Retrieval test page
7. `src/pages/tenant/BillingUsage.tsx` - Billing page
8. `.env.example` - Environment config template
## Files Modified
1. `src/App.tsx` - Added routes and ToastProvider
2. `src/components/layout/TenantLayout.tsx` - Updated sidebar navigation
3. `src/pages/tenant/LiveChatTest.tsx` - Updated to use RAG backend
4. `package.json` - Added axios dependency
## Routes Added
| Route | Component | Description |
|-------|-----------|-------------|
| `/rag/knowledge-base` | RAGKnowledgeBasePage | Upload documents, view stats |
| `/rag/retrieval` | RetrievalTestPage | Test retrieval |
| `/rag/chat` | LiveChatTestPage | RAG chat |
| `/rag/billing` | BillingUsagePage | Usage & billing |
## Build Status
✅ **Build Passes**: TypeScript compilation successful
✅ **No Linter Errors**: All code validated
✅ **Routes Configured**: All pages accessible
✅ **Navigation Updated**: Sidebar includes RAG pages
## Next Steps
1. **Set Environment Variable**:
```bash
# Add to .env
VITE_RAG_API_URL=http://localhost:8000
```
2. **Start RAG Backend**:
```bash
cd rag-backend
uvicorn app.main:app --reload --port 8000
```
3. **Start Frontend**:
```bash
npm run dev
```
4. **Test Integration**:
- Login to frontend
- Navigate to "RAG Knowledge Base"
- Upload a document
- Test retrieval
- Test chat
- Check billing
## Security Checklist
- ✅ `tenant_id` extracted from JWT only
- ✅ No user input for tenant_id in production
- ✅ KB ID selector only in dev mode
- ✅ 401 errors trigger logout
- ✅ 402 errors show upgrade banner
## Integration Points
### Authentication Flow
1. User logs in → JWT stored in `localStorage` (`auth-token`)
2. `ragClient.ts` reads JWT from localStorage
3. JWT attached to all requests as `Authorization: Bearer <token>`
4. Backend extracts `tenant_id` and `user_id` from JWT claims
### Multi-Tenancy
- Frontend never sends `tenant_id` in request body
- Backend extracts `tenant_id` from JWT in production
- Dev mode allows KB ID selection for testing
### Error Handling
- 401 → Auto logout + redirect to `/login`
- 402 → Show upgrade banner (quota exceeded)
- Other errors → Toast notification
## Testing Guide
### 1. Knowledge Base Upload
```
1. Navigate to /rag/knowledge-base
2. Click "Upload Document"
3. Select PDF/DOCX/TXT/MD file
4. Verify success toast
5. Check stats update
```
### 2. Retrieval Test
```
1. Navigate to /rag/retrieval
2. Enter search query
3. Click "Search"
4. Verify chunks displayed
5. Check similarity scores
6. Expand/collapse chunks
```
### 3. Chat Test
```
1. Navigate to /rag/chat
2. Enter question
3. Verify answer with citations
4. Check confidence score
5. Verify citations list
```
### 4. Billing/Usage
```
1. Navigate to /rag/billing
2. Verify plan limits displayed
3. Check usage stats
4. View cost breakdown
```
## Status: ✅ READY FOR TESTING
All code implemented, routes configured, navigation updated, and build passes.
