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project/TESTING_GUIDE.md

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+# Universal API Key System - Testing Guide
+
+This guide will help you test the new universal API key system that automatically detects and validates API keys from multiple providers (OpenRouter, Google AI, OpenAI, and Anthropic).
+
+## Test Summary
+
+- **Backend Unit Tests**: 69 tests - ALL PASSING ✅
+- **Manual API Tests**: ALL PASSING ✅
+- **Frontend Integration**: Ready for testing
+
+## Prerequisites
+
+1. Ensure the backend server is running:
+   ```bash
+   cd /Users/gunbirsingh/Desktop/Code\ folders/visionforge/project
+   python3 manage.py runserver
+   ```
+
+2. Ensure the frontend dev server is running (if not already):
+   ```bash
+   cd /Users/gunbirsingh/Desktop/Code\ folders/visionforge/project/frontend
+   npm run dev
+   ```
+
+## Manual Testing Checklist
+
+### 1. API Key Validation Endpoint
+
+Test that the system correctly detects and validates different API key formats:
+
+#### Test OpenRouter Key
+```bash
+curl -X POST http://localhost:8000/api/v1/validate-key \
+  -H "Content-Type: application/json" \
+  -d '{"apiKey": "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"}'
+```
+
+**Expected Response:**
+```json
+{
+  "valid": true,
+  "provider": "openrouter",
+  "displayName": "OpenRouter",
+  "availableModels": 10,
+  "models": ["gemini-3-flash", "gemini-3-pro", "gemini-2.5-flash", "gemini-2.5-pro", "gpt-5.2", "gpt-4o", "gpt-4o-mini", "claude-opus-4.5", "claude-sonnet-4.5", "claude-haiku-4.5"],
+  "isFreeTier": true,
+  "message": "Valid OpenRouter API key detected"
+}
+```
+
+#### Test Google AI Key
+```bash
+curl -X POST http://localhost:8000/api/v1/validate-key \
+  -H "Content-Type: application/json" \
+  -d '{"apiKey": "AIzaSyAkKJPaCtQXhd4JIy_OskAsHilxmywhYqY"}'
+```
+
+**Expected Response:**
+```json
+{
+  "valid": true,
+  "provider": "google",
+  "displayName": "Google AI (Gemini)",
+  "availableModels": 4,
+  "models": ["gemini-3-flash", "gemini-3-pro", "gemini-2.5-flash", "gemini-2.5-pro"],
+  "isFreeTier": true,
+  "message": "Valid Google AI (Gemini) API key detected"
+}
+```
+
+#### Test OpenAI Key
+```bash
+curl -X POST http://localhost:8000/api/v1/validate-key \
+  -H "Content-Type: application/json" \
+  -d '{"apiKey": "sk-proj-abc123def456ghi789jkl012mno345pqr678stu901vwx234"}'
+```
+
+**Expected Response:**
+```json
+{
+  "valid": true,
+  "provider": "openai",
+  "displayName": "OpenAI",
+  "availableModels": 3,
+  "models": ["gpt-5.2", "gpt-4o", "gpt-4o-mini"],
+  "isFreeTier": false,
+  "message": "Valid OpenAI API key detected"
+}
+```
+
+#### Test Anthropic (Claude) Key
+```bash
+curl -X POST http://localhost:8000/api/v1/validate-key \
+  -H "Content-Type: application/json" \
+  -d '{"apiKey": "sk-ant-api03-R2D2C3PO4R2D2C3PO4R2D2C3PO4R2D2C3PO4R2D2C3PO4igAA"}'
+```
+
+**Expected Response:**
+```json
+{
+  "valid": true,
+  "provider": "anthropic",
+  "displayName": "Anthropic (Claude)",
+  "availableModels": 3,
+  "models": ["claude-opus-4.5", "claude-sonnet-4.5", "claude-haiku-4.5"],
+  "isFreeTier": false,
+  "message": "Valid Anthropic (Claude) API key detected"
+}
+```
+
+#### Test Invalid Key
+```bash
+curl -X POST http://localhost:8000/api/v1/validate-key \
+  -H "Content-Type: application/json" \
+  -d '{"apiKey": "invalid-key-format-12345"}'
+```
+
+**Expected Response:**
+```json
+{
+  "valid": false,
+  "provider": null,
+  "displayName": null,
+  "availableModels": 0,
+  "models": [],
+  "isFreeTier": false,
+  "message": "Unknown API key format. Supported: OpenRouter (sk-or-v1-...), Google AI (AIza...), OpenAI (sk-proj-... or sk-...), Anthropic (sk-ant-api03-...)"
+}
+```
+
+### 2. Available Models Endpoint
+
+Test that the system returns correct models for each provider:
+
+#### Test with Google AI Key
+```bash
+curl -X POST http://localhost:8000/api/v1/available-models \
+  -H "Content-Type: application/json" \
+  -d '{"apiKey": "AIzaSyAkKJPaCtQXhd4JIy_OskAsHilxmywhYqY"}'
+```
+
+**Expected Response:**
+```json
+{
+  "provider": "google",
+  "displayName": "Google AI (Gemini)",
+  "models": ["gemini-3-flash", "gemini-3-pro", "gemini-2.5-flash", "gemini-2.5-pro"],
+  "defaultModel": "gemini-3-flash",
+  "isFreeTier": true
+}
+```
+
+✅ Verify that only Gemini models are returned for Google AI keys
+✅ Verify that only GPT models are returned for OpenAI keys (test with sk-proj- key)
+✅ Verify that only Claude models are returned for Anthropic keys
+
+### 3. Frontend UI Testing
+
+#### Access the Application
+1. Open your browser and navigate to: `http://localhost:5173`
+
+#### Test the Universal API Key Modal
+
+**Test 1: Opening the Modal**
+1. Click on the API key button in the navigation bar
+2. ✅ Verify the modal opens with title "API Key Setup"
+3. ✅ Verify the modal shows instructions about supported providers
+
+**Test 2: Real-time Key Validation**
+1. Paste an OpenRouter key (starts with `sk-or-v1-`)
+2. ✅ Verify "Detecting provider..." appears briefly
+3. ✅ Verify green checkmark appears with "Valid OpenRouter API key detected"
+4. ✅ Verify "Free Tier" badge is shown
+5. ✅ Verify model dropdown shows 10 models (all providers)
+
+**Test 3: Google AI Key**
+1. Clear the input and paste a Google AI key (starts with `AIza`, 39 chars)
+2. ✅ Verify detection shows "Valid Google AI (Gemini) API key detected"
+3. ✅ Verify model dropdown shows only 4 Gemini models
+4. ✅ Verify GPT and Claude models are disabled or hidden
+5. ✅ Verify "Free Tier" badge is shown
+
+**Test 4: OpenAI Key**
+1. Clear and paste an OpenAI key (starts with `sk-proj-` or `sk-`)
+2. ✅ Verify detection shows "Valid OpenAI API key detected"
+3. ✅ Verify model dropdown shows only 3 GPT models
+4. ✅ Verify Gemini and Claude models are disabled or hidden
+5. ✅ Verify NO "Free Tier" badge (OpenAI is paid)
+
+**Test 5: Anthropic Key**
+1. Clear and paste an Anthropic key (starts with `sk-ant-api03-`)
+2. ✅ Verify detection shows "Valid Anthropic (Claude) API key detected"
+3. ✅ Verify model dropdown shows only 3 Claude models
+4. ✅ Verify Gemini and GPT models are disabled or hidden
+5. ✅ Verify NO "Free Tier" badge (Anthropic is paid)
+
+**Test 6: Invalid Key**
+1. Type an invalid key like "invalid-test-key"
+2. ✅ Verify red X icon appears
+3. ✅ Verify error message shows "Unknown API key format"
+4. ✅ Verify "Save & Continue" button is disabled
+
+**Test 7: Model Selection**
+1. Enter a valid Google AI key
+2. Select "Gemini 3 Flash" from the dropdown
+3. Click "Save & Continue"
+4. ✅ Verify modal closes
+5. ✅ Verify the selected model is remembered on page refresh
+
+**Test 8: Key Persistence**
+1. Enter a valid API key and save
+2. Refresh the page
+3. Reopen the modal
+4. ✅ Verify the key is still there (masked)
+5. ✅ Verify the selected model is still selected
+
+**Test 9: Clear Keys**
+1. With a key saved, open the modal
+2. Click "Clear Key" button
+3. ✅ Verify the key is removed from storage
+4. ✅ Verify modal is empty when reopened
+
+### 4. Chat Integration Testing
+
+**Note**: You'll need a REAL API key from one of the providers for this test.
+
+#### Test with Real API Key
+1. Get a free API key from:
+   - Google AI Studio: https://aistudio.google.com/app/apikey (FREE)
+   - OpenRouter: https://openrouter.ai/keys (FREE trial)
+
+2. Enter your real API key in the modal
+3. Select a model
+4. Navigate to the chat interface
+5. Send a test message: "Hello, can you respond to confirm you're working?"
+6. ✅ Verify you get a response from the AI
+7. ✅ Verify the correct model was used (check response style)
+
+#### Test Provider-Specific Models
+1. If using Google AI key, select "Gemini 3 Flash"
+2. Send a message
+3. ✅ Verify it works (no errors about incompatible models)
+4. Try selecting "GPT-5.2"
+5. ✅ Verify you get an error (model not available for this provider)
+
+## Running Automated Tests
+
+### Backend Tests
+```bash
+cd /Users/gunbirsingh/Desktop/Code\ folders/visionforge/project
+python3 manage.py test block_manager.tests
+```
+
+**Expected Output:**
+```
+Ran 69 tests in X.XXXs
+
+OK
+```
+
+### Test Coverage Breakdown
+- **API Key Detection Tests**: 23 tests
+  - Provider detection (OpenRouter, Google AI, OpenAI, Anthropic)
+  - Invalid key handling
+  - Edge cases (whitespace, wrong length, etc.)
+  - Provider info retrieval
+  - Model availability checking
+
+- **Universal AI Factory Tests**: 24 tests
+  - Service creation for each provider
+  - Model validation and filtering
+  - Server-side key handling (DEV mode)
+  - Error handling
+
+- **API Endpoint Tests**: 22 tests
+  - Key validation endpoint
+  - Available models endpoint
+  - Environment info endpoint
+  - Chat endpoint with universal keys
+
+## Known Issues & Limitations
+
+1. **Frontend Token Persistence**: API keys are stored in `sessionStorage` (cleared on browser close) for security. This is intentional.
+
+2. **Rate Limiting**: The chat endpoint has rate limiting (15 requests/minute per IP in dev mode).
+
+3. **Test API Keys**: The test keys in this guide are fake examples. You need real keys to test actual AI responses.
+
+## Success Criteria
+
+✅ **All 69 backend tests pass**
+✅ **API key validation works for all 4 providers**
+✅ **Model filtering works correctly per provider**
+✅ **Frontend modal shows real-time validation**
+✅ **Invalid keys are properly rejected**
+✅ **Free tier badges display correctly**
+✅ **Selected models are saved and restored**
+✅ **Chat integration works with real API keys**
+
+## Troubleshooting
+
+### Issue: "Cannot import name 'GeminiService'"
+**Solution**: Restart the Django server. The auto-reloader may have cached old imports.
+
+### Issue: "401 Unauthorized" when testing chat
+**Solution**: This is expected in PROD mode without a valid API key. Set `ENVIRONMENT=DEV` in `.env` or provide a real API key.
+
+### Issue: Frontend can't connect to backend
+**Solution**:
+1. Verify backend is running on port 8000
+2. Check CORS settings in `backend/settings.py`
+3. Ensure `http://localhost:5173` is in `CORS_ALLOWED_ORIGINS`
+
+## Next Steps
+
+After testing, you can:
+1. Deploy to production with real API keys
+2. Add more AI providers (Cohere, Mistral, etc.)
+3. Implement API key encryption for storage
+4. Add usage tracking and quotas per key
+5. Create a key management dashboard
+
+## Test Results Summary
+
+**Date**: December 22, 2025
+**Backend Tests**: 69/69 PASSED ✅
+**Manual API Tests**: ALL PASSED ✅
+**Status**: Ready for User Acceptance Testing
+
+---
+
+For any issues during testing, please check:
+1. Django server logs in terminal
+2. Browser console for frontend errors
+3. Network tab for failed API requests

project/backend/settings.py

@@ -120,8 +120,9 @@
     'user-agent',
     'x-csrftoken',
     'x-requested-with',
-    'x-gemini-api-key',
-    'x-anthropic-api-key',
+    'x-api-key',  # Universal API key header (supports all providers)
+    'x-openrouter-api-key',  # Legacy header (backward compatibility)
+    'x-selected-model',
     'x-firebase-token',
 ]
 
@@ -153,14 +154,17 @@
 # Database
 # https://docs.djangoproject.com/en/5.2/ref/settings/#databases
 
+# Check if running tests
+IS_TESTING = 'test' in sys.argv
+
 DATABASES = {
     # Oracle Autonomous Database - now default for all data
     'default': {
-        'ENGINE': 'django.db.backends.oracle',
-        'NAME': os.getenv('ORACLE_DSN', ''),
-        'USER': os.getenv('ORACLE_USER', ''),
-        'PASSWORD': os.getenv('ORACLE_PASSWORD', ''),
-        'OPTIONS': {
+        'ENGINE': 'django.db.backends.oracle' if not IS_TESTING else 'django.db.backends.sqlite3',
+        'NAME': BASE_DIR / 'test_db.sqlite3' if IS_TESTING else os.getenv('ORACLE_DSN', ''),
+        'USER': '' if IS_TESTING else os.getenv('ORACLE_USER', ''),
+        'PASSWORD': '' if IS_TESTING else os.getenv('ORACLE_PASSWORD', ''),
+        'OPTIONS': {} if IS_TESTING else {
             'config_dir': os.getenv('ORACLE_WALLET_LOCATION', ''),
             'wallet_location': os.getenv('ORACLE_WALLET_LOCATION', ''),
             'wallet_password': os.getenv('ORACLE_WALLET_PASSWORD', ''),