fasthue/README.md

# FastHue

A local, iPhone-first Philips Hue dashboard and command-line client. It works
with a Hue Bridge or Hue Bridge Pro on the same network.

## Dashboard

The dashboard fills an iPhone screen with eight dark controls in a 2 × 4 grid.

- A blue edge means at least one light in that room or zone is on.
- The subtitle is the active Hue scene, when one is active.
- Tap a button to activate the next configured scene.
- Press and hold a button for about 0.65 seconds to turn its lights off.

### Start it

First register the app with the bridge (you only need to do this once):

```sh
python3 hue.py register
```

Press the physical button on the bridge when prompted. Then install the small
web app dependencies and run it:

```sh
python3 -m venv .venv
.venv/bin/pip install -r requirements.txt
.venv/bin/python app.py
```

On the iPhone, open `http://YOUR-COMPUTER-IP:5000/` in Safari. The iPhone and
computer must be on the same local network.

## Configure buttons and scenes

`hue.yaml` controls the dashboard. The `buttons` entries define button order,
the target room/zone, and the ordered scenes to cycle through:

```yaml
buttons:
  1:
    name: Ground floor
    scenes:
      - Sunset allure
      - Relax
```

Each button name must match a `rooms` or `zones` entry. Scene names must match
scenes for that same group in the main `scenes` catalog. The app expects exactly
eight buttons.

## Command line client

```sh
# Find local bridges
python3 hue.py discover

# List rooms, zones, and scenes
python3 hue.py list

# Activate a scene or control a group directly
python3 hue.py scene "Evening relax"
python3 hue.py on "Living room"
python3 hue.py off "zone:Downstairs"
```

Credentials are saved with owner-only permissions in
`secrets.yaml`:

```yaml
bridge: 192.168.1.10
app_key: your-hue-application-key
```

The file is ignored by Git and should not be shared. `hue.py register` creates
or updates it. You can override the bridge values with environment variables:

```sh
HUE_BRIDGE=192.168.1.10 HUE_APP_KEY=YOUR_HUE_KEY .venv/bin/python app.py
```

The reverse-proxy path is configured separately in `config.yaml`:

```yaml
url_prefix: /hue
```

Set it to an empty value when FastHue is served at `/`.

## HTTP API

The dashboard API does not require a key. Do not expose it to untrusted users:
every client that can reach it can read and control the configured lights.

```sh
curl http://localhost:5000/api/groups
curl -X POST \
  http://localhost:5000/api/groups/GROUP_UUID/next-scene
curl -X POST \
  http://localhost:5000/api/groups/GROUP_UUID/off
curl -X POST \
  -H 'Content-Type: application/json' \
  -d '{"name":"Relax"}' \
  'http://localhost:5000/api/groups/Ground%20floor/scene'
```

`GET /api/groups` returns each configured group ID, its power state, and its
active scene. Use those IDs for the `next-scene` and `off` endpoints. The
`scene` endpoint uses the URL-encoded room or zone name (not its UUID), and
activates the named scene only when it belongs to that group. Keep this service on
a trusted network; the included Flask server uses HTTP, so place it behind an
HTTPS reverse proxy if it needs to cross an untrusted network.

## Deploy with Gunicorn and Nginx

These instructions target a Linux host running systemd. Gunicorn listens on a
Unix socket; Nginx is the only public-facing process.

Install the project and dependencies under a service account, then place its
credentials outside the web root:

```sh
sudo useradd --system --create-home --shell /usr/sbin/nologin fasthue
sudo mkdir -p /srv/fasthue /etc/fasthue
sudo chown fasthue:fasthue /srv/fasthue /etc/fasthue
# Copy this project into /srv/fasthue, then:
sudo -u fasthue python3 -m venv /srv/fasthue/.venv
sudo -u fasthue /srv/fasthue/.venv/bin/pip install -r /srv/fasthue/requirements.txt
sudo install -o fasthue -g fasthue -m 600 secrets.yaml /etc/fasthue/secrets.yaml
```

Create `/etc/systemd/system/fasthue.service`:

```ini
[Unit]
Description=FastHue dashboard
After=network-online.target
Wants=network-online.target

[Service]
Type=exec
User=fasthue
# Use your Nginx worker group (commonly www-data; use nginx on some distros).
Group=www-data
WorkingDirectory=/srv/fasthue
Environment=FASTHUE_SECRETS_FILE=/etc/fasthue/secrets.yaml
RuntimeDirectory=fasthue
RuntimeDirectoryMode=0750
ExecStart=/srv/fasthue/.venv/bin/gunicorn --workers 1 --umask 007 --bind unix:/run/fasthue/fasthue.sock app:gunicorn_app
Restart=on-failure
RestartSec=3

[Install]
WantedBy=multi-user.target
```

Enable it:

```sh
sudo systemctl daemon-reload
sudo systemctl enable --now fasthue
sudo systemctl status fasthue
```

Configure Nginx with a TLS-enabled virtual host (replace the hostname and
certificate paths). This example publishes FastHue at `/hue`:

```nginx
server {
    listen 443 ssl http2;
    server_name hue.example.com;

    ssl_certificate     /etc/letsencrypt/live/hue.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/hue.example.com/privkey.pem;

    location = /hue {
        return 302 /hue/;
    }

    location /hue/ {
        # The trailing slash strips /hue before proxying to Flask.
        proxy_pass http://unix:/run/fasthue/fasthue.sock:/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Prefix /hue;
    }
}
```

The `www-data` group in the systemd unit and `--umask 007` make the socket
readable by Nginx. If your Nginx workers use another group, replace `www-data`
in the unit with that group. Test and reload Nginx with
`sudo nginx -t && sudo systemctl reload nginx`.
Use the HTTPS URL on the iPhone with `/hue/`. Set `url_prefix` in `config.yaml`
to another leading-slash prefix when needed, and use the same value in Nginx's `location` and
`X-Forwarded-Prefix`. Keep
`secrets.yaml` readable only by the service account.

The bridge typically has a locally issued TLS certificate, so certificate
verification is disabled by default. Add `--verify-tls` only when your computer
trusts that certificate.

## Files

- `app.py` — Flask dashboard and Hue API integration
- `hue.py` — dependency-free command-line client and registration tool
- `config.yaml` — reverse-proxy settings
- `hue.yaml` — button, group, and scene configuration
- `static/` and `templates/` — phone interface