# SQL Agent Web UI

A lightweight FastAPI + vanilla JS frontend for interacting with the SugarScale SQL agent.

## Backend

Located at `db_agent/ui/backend/main.py`. It exposes:
- `POST /api/query` – wraps the existing agent pipeline (LLM + optional SQL execution + logging).
- `GET /health` – health probe.
- Serves the static frontend and index page.

### Run locally
```powershell
# Activate your virtual environment first
uvicorn db_agent.ui.backend.main:app --reload --host 0.0.0.0 --port 8000
```

The UI will be available at `http://localhost:8000/`. Adjust the host/port as needed.

## Frontend

Files under `db_agent/ui/frontend/`:
- `index.html` – main page with the question form, quick-reference card, and results display.
- `static/app.js` – handles form submission, fetches `/api/query`, renders results, and powers CSV/HTML exports plus reset logic.
- `static/styles.css` – modern styling.

## Configuration Notes
- The backend reuses environment variables (`DB_SERVER`, `DB_DATABASE`, etc.) for SQL execution, so ensure they are set before starting the FastAPI server. Dot-source `db_agent/scripts/Set-DbEnv.ps1` to populate them in one step and supply `-Password (Read-Host -AsSecureString)` if you prefer an inline prompt.
- The backend expects the LLM endpoint configured in `db_agent/client.LlmConfig.base_url` (defaults to `http://192.168.0.30:8080`). Update if your TGI server runs elsewhere.
- Interaction logs still append to `db_agent/logs/query_log.jsonl` by default.
- Set `UI_BASIC_USER` and `UI_BASIC_PASSWORD` to enable HTTP Basic auth for the web UI/API. When present, every route except `/health` requires those credentials; omit both variables to leave the UI open (useful for local dev).

## UI Tips
- The form defaults to executing SQL and pre-populates table hints with `dbo.SugarLoadData`; use the Reset button to restore these defaults while clearing previous results.
- After running a query, download the result grid as CSV via **Export CSV** or grab a formatted HTML report with **Download Report** for sharing.
- The quick-reference panel beside the form lists common companies/destinations—update it as real-world values change so operators have fresh context.

## Next Ideas
- Add user authentication or API keys.
- Save favorite queries or table presets.
- Stream results for large datasets.