# fluxo

`fluxo` is a high-performance system metrics daemon and client designed specifically for Waybar. It entirely replaces standard shell scripts with a compiled Rust binary that collects data via a background polling loop and serves it over a Unix socket. 

With its **100% Native, Content-Based Event-Driven Architecture**, it consumes effectively 0% CPU while idle and signals Waybar to redraw *only* when the rendered UI text or icons physically change.

## Key Features

- **100% Native Architecture**: Zero shell-outs or subprocesses. Uses `bluer` for Bluetooth, `libpulse-binding` for audio, `zbus` for MPRIS/DND, and `notify` for backlight.
- **Content-Based Event Signaling**: `fluxo` evaluates your custom configuration formats internally. It only sends a `SIGRTMIN+X` signal to Waybar if the resulting string or CSS class has actually changed, eliminating pointless re-renders from raw polling fluctuations.
- **Zero-Latency Interactions**: Direct library bindings mean that when you change your volume or connect a Bluetooth device via the CLI, the daemon updates instantly.
- **Circuit Breaker (Failsafe)**: Automatically detects failing modules and enters a "Cool down" state, preventing resource waste and log spam. Fallback caching keeps your bar looking clean even during brief failures.
- **Multi-threaded Polling**: Decoupled Tokio subsystem threads ensure that a hang in one system (e.g., a slow GPU probe) never freezes your Waybar.

## Modules

| Command | Description | Tokens |
| :--- | :--- | :--- |
| `cpu` | CPU usage and temperature | `{usage}`, `{temp}`, `{model}` |
| `mem` | Memory usage | `{used}`, `{total}` |
| `net` | Network status & speeds | `{interface}`, `{ip}`, `{rx}`, `{tx}` |
| `sys` | System load and uptime | `{uptime}`, `{load1}`, `{load5}`, `{load15}`, `{procs}` |
| `disk` | Disk usage | `{mount}`, `{used}`, `{total}` |
| `pool` | Btrfs aggregate storage | `{used}`, `{total}` |
| `gpu` | GPU usage & thermals | `{usage}`, `{vram_used}`, `{vram_total}`, `{temp}` |
| `vol` | Audio output (sink) | `{name}`, `{volume}`, `{icon}` |
| `mic` | Audio input (source) | `{name}`, `{volume}`, `{icon}` |
| `bt` | Bluetooth status & plugins | `{alias}`, `{mac}`, `{left}`, `{right}`, `{anc}` |
| `power` | Battery and AC status | `{percentage}`, `{icon}` |
| `game` | Hyprland Gamemode status | active/inactive strings |
| `mpris` | Media Player status | `{artist}`, `{title}`, `{album}`, `{status_icon}` |
| `backlight` | Display Brightness | `{percentage}`, `{icon}` |
| `kbd` | Keyboard Layout | `{layout}` |
| `dnd` | Do Not Disturb (SwayNC) | active/inactive strings |

## Setup

1. **Build**: `cargo build --release`
2. **Configure**: Create `~/.config/fluxo/config.toml` (see `example.config.toml`). Ensure you map your `[signals]`.
3. **Daemon**: Start `fluxo daemon`. It is highly recommended to run this as a systemd user service.

## Waybar Configuration

To achieve zero-latency updates and zero-polling CPU usage, set `interval: 0` on your modules and rely entirely on **Waybar Signals** mapped in your `config.toml`:

```jsonc
"custom/volume": {
    "exec": "fluxo vol",
    "return-type": "json",
    "interval": 0,
    "signal": 8, // Must match the value in config.toml [signals]
    "on-click": "fluxo vol mute",
    "on-scroll-up": "fluxo vol up 1",
    "on-scroll-down": "fluxo vol down 1",
    "on-click-right": "fluxo vol cycle"
},
"custom/bluetooth-audio": {
    "format": "{}",
    "return-type": "json",
    "exec": "fluxo bt",
    "on-click": "fluxo bt menu",
    "on-click-right": "fluxo bt cycle_mode",
    "signal": 9,
    "interval": 0,
    "tooltip": true
}
```

## Debugging

Start the daemon with `RUST_LOG=debug` to see detailed logs of library interactions and circuit breaker status:
```bash
RUST_LOG=debug fluxo daemon
```