feat: streaming API backend, Streamlit integration, and E2E infra

.github/workflows/release.yml

@@ -0,0 +1,232 @@
+name: Release Pipeline
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version to release (e.g., 1.0.0)'
+        required: true
+        type: string
+      environment:
+        description: 'Environment to deploy to'
+        required: true
+        default: 'staging'
+        type: choice
+        options:
+          - staging
+          - production
+
+env:
+  PYTHON_VERSION: '3.11'
+  NODE_VERSION: '18'
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    outputs:
+      version: ${{ steps.get-version.outputs.version }}
+      is-production: ${{ steps.get-version.outputs.is-production }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Get version info
+        id: get-version
+        run: |
+          if [[ "${{ github.ref }}" == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+          else
+            VERSION=${{ github.event.inputs.version }}
+          fi
+          if [[ ! $VERSION =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-rc\.[0-9]+)?$ ]]; then
+            echo "❌ Invalid version format: $VERSION"
+            echo "Expected format: v1.0.0 or v1.0.0-rc.1"
+            exit 1
+          fi
+          if [[ $VERSION =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            IS_PRODUCTION="true"
+          else
+            IS_PRODUCTION="false"
+          fi
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "is-production=$IS_PRODUCTION" >> $GITHUB_OUTPUT
+          echo "📦 Version: $VERSION"
+          echo "🏭 Production: $IS_PRODUCTION"
+  test-suite:
+    runs-on: ubuntu-latest
+    needs: validate
+    strategy:
+      matrix:
+        test-type: [unit, e2e, integration, performance]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: 'npm'
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+          npm ci
+          npx playwright install --with-deps
+      - name: Run ${{ matrix.test-type }} tests
+        run: |
+          case "${{ matrix.test-type }}" in
+            "unit")
+              python -m pytest -n auto tests/ -m "unit or fast" --ignore=tests/integration -v
+              ;;
+            "e2e")
+              npx playwright test --reporter=html,json,junit
+              ;;
+            "integration")
+              python -m pytest -n auto tests/ -m "integration" -v --timeout=300
+              ;;
+            "performance")
+              python scripts/test_performance_regression.py
+              ;;
+          esac
+        env:
+          MOCK_EXTERNAL_SERVICES: "true"
+          TESTING: "true"
+          CHROMA_PERSIST_DIR: "./test_chroma_db"
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: ${{ matrix.test-type }}-results-${{ needs.validate.outputs.version }}
+          path: |
+            htmlcov/
+            playwright-report/
+            test-results.*
+            performance_metrics.json
+          retention-days: 30
+  build:
+    runs-on: ubuntu-latest
+    needs: [validate, test-suite]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: Install dependencies
+        run: pip install -r requirements.txt
+      - name: Generate release notes
+        id: release-notes
+        run: |
+          python scripts/generate_release_notes.py ${{ needs.validate.outputs.version }}
+      - name: Create release package
+        run: |
+          mkdir -p dist
+          tar -czf dist/basic-chat-${{ needs.validate.outputs.version }}.tar.gz \
+            --exclude='.git' \
+            --exclude='node_modules' \
+            --exclude='__pycache__' \
+            --exclude='*.pyc' \
+            --exclude='.pytest_cache' \
+            --exclude='htmlcov' \
+            --exclude='test_chroma_db' \
+            .
+      - name: Upload release package
+        uses: actions/upload-artifact@v4
+        with:
+          name: basic-chat-${{ needs.validate.outputs.version }}
+          path: dist/
+          retention-days: 90
+  deploy-staging:
+    runs-on: ubuntu-latest
+    needs: [validate, build]
+    environment: staging
+    if: needs.validate.outputs.is-production == 'false'
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: Install dependencies
+        run: pip install -r requirements.txt
+      - name: Deploy to staging
+        run: |
+          echo "🚀 Deploying ${{ needs.validate.outputs.version }} to staging..."
+          # Add your staging deployment logic here
+      - name: Run staging health check
+        run: |
+          python scripts/e2e_health_check.py
+      - name: Run staging smoke tests
+        run: |
+          npx playwright test tests/e2e/specs/smoke.spec.ts --project=chromium
+  deploy-production:
+    runs-on: ubuntu-latest
+    needs: [validate, build, deploy-staging]
+    environment: production
+    if: needs.validate.outputs.is-production == 'true'
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: Install dependencies
+        run: pip install -r requirements.txt
+      - name: Deploy to production
+        run: |
+          echo "🏭 Deploying ${{ needs.validate.outputs.version }} to production..."
+          # Add your production deployment logic here
+      - name: Run production health check
+        run: |
+          python scripts/e2e_health_check.py
+      - name: Create GitHub release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ needs.validate.outputs.version }}
+          release_name: BasicChat ${{ needs.validate.outputs.version }}
+          body: |
+            ## 🚀 Release ${{ needs.validate.outputs.version }}
+
+            ### 📋 Changes
+            ${{ steps.release-notes.outputs.notes }}
+
+            ### 🔧 Installation
+            ```bash
+            git clone https://github.com/khaosans/basic-chat.git
+            cd basic-chat
+            git checkout ${{ needs.validate.outputs.version }}
+            pip install -r requirements.txt
+            ./start_basicchat.sh
+            ```
+
+            ### 🧪 Testing
+            All tests passed:
+            - ✅ Unit tests
+            - ✅ E2E tests  
+            - ✅ Integration tests
+            - ✅ Performance tests
+
+            ### 📊 Metrics
+            - Performance: Within acceptable thresholds
+            - Coverage: >90%
+            - E2E: All scenarios passing
+          draft: false
+          prerelease: false
+  monitor:
+    runs-on: ubuntu-latest
+    needs: [deploy-production, deploy-staging]
+    if: always()
+    steps:
+      - name: Monitor deployment health
+        run: |
+          echo "📊 Monitoring deployment health..."
+      - name: Send deployment notification
+        run: |
+          echo "🔔 Deployment notification sent" 

README.md

@@ -82,6 +82,59 @@ ollama serve &
 
 ---
 
+## 🌐 Streaming API & Fallback
+
+BasicChat supports real-time streaming chat via a FastAPI backend, with robust fallback to local inference for maximum reliability and privacy.
+
+### 🔌 Enabling Streaming API
+- By default, the app uses the streaming API backend for chat.
+- Control this with the `USE_API` environment variable:
+  - `USE_API=true` (default): Use the API backend (WebSocket streaming, REST fallback)
+  - `USE_API=false`: Use local Ollama inference only (no API required)
+- Set this in your `.env.local` file:
+  ```env
+  USE_API=true
+  API_BASE_URL=http://localhost:8080
+  OLLAMA_API_URL=http://localhost:11434/api
+  OLLAMA_MODEL=mistral
+  ```
+
+### 🚀 Starting the Streaming Backend
+1. **Start the API backend:**
+   ```sh
+   ./backend/start.sh &
+   ```
+2. **Start the Streamlit app:**
+   ```sh
+   ./start_basicchat.sh &
+   ```
+3. **Run E2E tests:**
+   ```sh
+   bunx playwright test tests/e2e/specs/basic-e2e.spec.ts --project=chromium --headed
+   ```
+
+### 🔄 How Fallback Works
+- If the API backend is unavailable or `USE_API=false`, BasicChat automatically falls back to local Ollama inference.
+- WebSocket streaming is preferred; if it fails, REST API is used; if both fail, local inference is used.
+- This ensures chat always works, even if the backend is down or misconfigured.
+
+### 🩺 Health Checks & Troubleshooting
+- **Check API health:**
+  ```sh
+  curl http://localhost:8080/health
+  ```
+- **Run all service health checks before E2E:**
+  ```sh
+  poetry run python scripts/e2e_health_check.py
+  ```
+- **If chat is not streaming:**
+  - Ensure the backend is running on port 8080
+  - Check `.env.local` for correct `USE_API` and `API_BASE_URL`
+  - Review logs in `app.log` and backend console for errors
+  - Try setting `USE_API=false` to use local inference as a workaround
+
+---
+
 ## 🏆 Best Practices & Pro Tips
 
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