# NotifyPulse V4 (Server + Clients)

This V4 scaffold splits NotifyPulse into:

- Linux-hosted server (`v4/server`) for API, Web UI, PWA, settings, command routing.
- Windows agent (`v4/windows_client`) built as `.exe`, connected to server by WebSocket.
- Shared command protocol with ack/event flow.

V3 stays untouched in the repo root (`notifier.py`).

## Architecture

1. Server is the source of truth for settings, usecases, and command dispatch.
2. Windows client registers itself and executes device-local actions:
   - toast notifications
   - wallpaper changes
   - (overlay hook included, implementation placeholder)
3. PWA/web clients connect to the server and use the same API.
4. Updates are centralized with server-hosted update manifests:
   - `GET /api/v4/update/manifest/windows`
   - Client checks and reports update availability.

## Quick start (Linux server)

```bash
cd v4/server
python -m venv .venv
.\.venv\Scripts\Activate.ps1
pip install -r requirements.txt
uvicorn app.main:app --host 0.0.0.0 --port 8080
```

Server defaults:

- Web UI: `http://<server>:8080/`
- PWA: `http://<server>:8080/pwa/`
- Device WebSocket: `ws://<server>:8080/ws/device`

## Deploy on Linux (systemd)

Example target folder: `/opt/notifypulse`.

1. Copy repo to server and install deps:

```bash
sudo mkdir -p /opt/notifypulse
sudo chown -R $USER:$USER /opt/notifypulse
cd /opt/notifypulse
python3 -m venv v4/server/.venv
source v4/server/.venv/bin/activate
pip install -r v4/server/requirements.txt
```

2. Create env file:

```bash
cat > /opt/notifypulse/v4/server/.env <<'EOF'
NP4_HOST=0.0.0.0
NP4_PORT=8080
NP4_API_TOKEN=replace-with-long-random-token
NP4_DATA_DIR=/opt/notifypulse/v4_data
EOF
```

3. Create systemd service `/etc/systemd/system/notifypulse-v4.service`:

```ini
[Unit]
Description=NotifyPulse V4 Server
After=network.target

[Service]
Type=simple
User=www-data
WorkingDirectory=/opt/notifypulse/v4/server
EnvironmentFile=/opt/notifypulse/v4/server/.env
ExecStart=/opt/notifypulse/v4/server/.venv/bin/uvicorn app.main:app --host ${NP4_HOST} --port ${NP4_PORT}
Restart=always
RestartSec=3

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

4. Enable service:

```bash
sudo systemctl daemon-reload
sudo systemctl enable --now notifypulse-v4
sudo systemctl status notifypulse-v4
```

## Optional: Nginx reverse proxy + HTTPS

Minimal Nginx vhost:

```nginx
server {
    listen 80;
    server_name your.domain.tld;

    location / {
        proxy_pass http://127.0.0.1:8080;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }

    location /ws/device {
        proxy_pass http://127.0.0.1:8080/ws/device;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
    }
}
```

Then add TLS (recommended) with Certbot.

## Quick start (Windows client)

```powershell
cd v4\windows_client
py -m venv .venv
.venv\Scripts\activate
pip install -r requirements.txt
$env:NP4_SERVER_URL="http://<server>:8080"
$env:NP4_API_TOKEN="<optional token>"
python client.py
```

## Build Windows `.exe`

```powershell
cd v4\windows_client
build.bat
```

Output: `dist\NotifyPulseAgent-V4.exe`

## Easy update model

1. Publish new Windows agent builds on your server/CDN.
2. Update the manifest in server data:
   - `v4_data/update_manifest.json` (auto-created on first boot)
3. Client periodically checks `GET /api/v4/update/manifest/windows`.
4. If newer version is detected, client emits `update_available` event.

You can later switch this to silent self-update (download + staged swap + restart), but this scaffold keeps it safe and transparent first.

## iOS note

PWA is the practical path. iOS sideloading native apps is possible but adds signing/provisioning/distribution complexity and is not "easy update" compared to PWA.

## Troubleshooting

- `Desktop test -> Wallpaper` does nothing:
  - Ensure an active usecase exists.
  - Add files under `v4_data/usecases/<usecase_id>/wallpapers/`.
- `Desktop test -> Overlay` does nothing:
  - Add files under `v4_data/usecases/<usecase_id>/overlay/`.
  - Rebuild/update the Windows agent so it includes overlay support.
- PWA wallpaper is identical for lock/home:
  - Add at least 2 images under `v4_data/usecases/<usecase_id>/mobile/`.
  - With only one image, both slots intentionally use that single image.