baldav/src-tauri/src/ble.rs

// BLE Heart Rate module — desktop (btleplug) + Android (Kotlin service + file IPC).

use serde::{Serialize, Deserialize};
#[cfg(not(target_os = "android"))]
use std::sync::{Arc, Mutex};

#[derive(Serialize, Deserialize, Clone, Debug)]
pub struct BleDevice {
    pub name: String,
    pub address: String,
    pub device_type: String, // "hr_standard", "fitpro", "unknown"
    pub rssi: i32,
}

#[derive(Serialize, Deserialize, Clone, Debug, Default)]
pub struct HrReading {
    pub hr: u16,
    #[serde(default)]
    pub spo2: Option<u8>,
    #[serde(default)]
    pub bp_sys: Option<u8>,
    #[serde(default)]
    pub bp_dia: Option<u8>,
    #[serde(alias = "ts", default)]
    pub timestamp: u64,
    #[serde(default)]
    pub device: String,
    #[serde(alias = "bat", default)]
    pub battery: Option<u8>,
}

// DIY barometer reading (BaroBalDav): atmospheric pressure in Pa and optional chip temperature.
// JS turns pressure into altitude (hypsometric formula, using temp), anchored to GPS at ride start.
#[derive(Serialize, Deserialize, Clone, Debug, Default)]
pub struct BaroReading {
    pub pressure_pa: f64,
    #[serde(default)]
    pub temp_c: Option<f64>,
    #[serde(alias = "ts", default)]
    pub timestamp: u64,
}

// Shared state for BLE operations
#[cfg(not(target_os = "android"))]
lazy_static::lazy_static! {
    static ref BLE_STATE: Arc<Mutex<BleState>> = Arc::new(Mutex::new(BleState::default()));
}

#[cfg(not(target_os = "android"))]
#[derive(Default)]
struct BleState {
    scan_results: Vec<BleDevice>,
    connected_device: Option<String>,
    latest_hr: Option<HrReading>,
    scanning: bool,
    connected: bool,
}

// Standard BLE Heart Rate Service UUID
const HR_SERVICE_UUID: &str = "0000180d-0000-1000-8000-00805f9b34fb";
const HR_MEASUREMENT_UUID: &str = "00002a37-0000-1000-8000-00805f9b34fb";

// Standard Environmental Sensing — our DIY barometer "BaroBalDav"
const ESS_SERVICE: &str = "0000181a-0000-1000-8000-00805f9b34fb";

// FitPro Nordic UART UUIDs
const FITPRO_SERVICE: &str = "6e400001-b5a3-f393-e0a9-e50e24dcca9d";
const FITPRO_WRITE: &str = "6e400002-b5a3-f393-e0a9-e50e24dcca9d";
const FITPRO_NOTIFY: &str = "6e400003-b5a3-f393-e0a9-e50e24dcca9d";

// FitPro protocol packets
const FITPRO_PAIR: &[u8] = &[0xCD, 0x00, 0x06, 0x12, 0x01, 0x0A, 0x00, 0x01, 0x02];
const FITPRO_HR_SWITCH_ON: &[u8] = &[0xCD, 0x00, 0x06, 0x12, 0x01, 0x0D, 0x00, 0x01, 0x01];
const FITPRO_MEASURE_START: &[u8] = &[0xCD, 0x00, 0x07, 0x12, 0x01, 0x24, 0x00, 0x02, 0x00, 0x01];
const FITPRO_REALTIME_ON: &[u8] = &[0xCD, 0x00, 0x06, 0x15, 0x01, 0x06, 0x00, 0x01, 0x01];

#[cfg(not(target_os = "android"))]
mod desktop {
    use super::*;
    use btleplug::api::{
        Central, Manager as _, Peripheral as _, ScanFilter, CharPropFlags, WriteType,
    };
    use btleplug::platform::{Manager, Peripheral, Adapter};
    use std::time::Duration;
    use uuid::Uuid;

    fn uuid(s: &str) -> Uuid {
        Uuid::parse_str(s).unwrap()
    }

    async fn get_adapter() -> Result<Adapter, String> {
        let manager = Manager::new().await.map_err(|e| format!("BLE manager: {}", e))?;
        let adapters = manager.adapters().await.map_err(|e| format!("BLE adapters: {}", e))?;
        adapters.into_iter().next().ok_or_else(|| "No BLE adapter found".to_string())
    }

    fn detect_device_type(name: &str, services: &[Uuid]) -> String {
        // Our DIY barometer advertises standard Environmental Sensing
        if services.contains(&uuid(ESS_SERVICE)) {
            return "baro".to_string();
        }
        // Check for standard HR service
        if services.contains(&uuid(HR_SERVICE_UUID)) {
            return "hr_standard".to_string();
        }
        // Check for FitPro Nordic UART
        if services.contains(&uuid(FITPRO_SERVICE)) {
            return "fitpro".to_string();
        }
        // Heuristic by name
        let lower = name.to_lowercase();
        if lower.contains("fitpro") || lower.contains("band") || lower.contains("m7") || lower.contains("m8") {
            return "fitpro".to_string();
        }
        if lower.contains("coospo") || lower.contains("polar") || lower.contains("garmin")
            || lower.contains("wahoo") || lower.contains("hr") {
            return "hr_standard".to_string();
        }
        "unknown".to_string()
    }

    pub async fn scan_devices(duration_secs: u64) -> Result<Vec<BleDevice>, String> {
        {
            let mut state = BLE_STATE.lock().unwrap();
            state.scanning = true;
            state.scan_results.clear();
        }

        let adapter = get_adapter().await?;
        adapter.start_scan(ScanFilter::default())
            .await.map_err(|e| format!("Scan start: {}", e))?;

        tokio::time::sleep(Duration::from_secs(duration_secs)).await;

        adapter.stop_scan().await.map_err(|e| format!("Scan stop: {}", e))?;

        let peripherals = adapter.peripherals().await.map_err(|e| format!("Peripherals: {}", e))?;
        let mut devices = Vec::new();

        for p in peripherals {
            if let Ok(Some(props)) = p.properties().await {
                let name = props.local_name.unwrap_or_default();
                if name.is_empty() { continue; }
                let services = props.services;
                let device_type = detect_device_type(&name, &services);
                let rssi = props.rssi.unwrap_or(0) as i32;
                let address = p.address().to_string();
                devices.push(BleDevice { name, address, device_type, rssi });
            }
        }

        {
            let mut state = BLE_STATE.lock().unwrap();
            state.scan_results = devices.clone();
            state.scanning = false;
        }

        Ok(devices)
    }

    pub async fn connect_device(address: &str, device_type: &str) -> Result<String, String> {
        let adapter = get_adapter().await?;
        let peripherals = adapter.peripherals().await.map_err(|e| format!("{}", e))?;

        let peripheral = peripherals.into_iter()
            .find(|p| p.address().to_string() == address)
            .ok_or_else(|| format!("Device {} not found. Run scan first.", address))?;

        peripheral.connect().await.map_err(|e| format!("Connect: {}", e))?;
        peripheral.discover_services().await.map_err(|e| format!("Discover: {}", e))?;

        match device_type {
            "hr_standard" => setup_standard_hr(&peripheral).await?,
            "fitpro" => setup_fitpro(&peripheral).await?,
            _ => return Err(format!("Unknown device type: {}", device_type)),
        }

        {
            let mut state = BLE_STATE.lock().unwrap();
            state.connected = true;
            state.connected_device = Some(address.to_string());
        }

        // Spawn background task to read notifications
        let dev_type = device_type.to_string();
        tokio::spawn(async move {
            read_notifications(peripheral, &dev_type).await;
        });

        Ok(format!("Connected to {}", address))
    }

    async fn setup_standard_hr(peripheral: &Peripheral) -> Result<(), String> {
        let chars = peripheral.characteristics();
        let hr_char = chars.iter()
            .find(|c| c.uuid == uuid(HR_MEASUREMENT_UUID) && c.properties.contains(CharPropFlags::NOTIFY))
            .ok_or("HR measurement characteristic not found")?;
        peripheral.subscribe(hr_char).await.map_err(|e| format!("Subscribe HR: {}", e))?;
        Ok(())
    }

    async fn setup_fitpro(peripheral: &Peripheral) -> Result<(), String> {
        let chars = peripheral.characteristics();
        let write_char = chars.iter()
            .find(|c| c.uuid == uuid(FITPRO_WRITE))
            .ok_or("FitPro write characteristic not found")?.clone();
        let notify_char = chars.iter()
            .find(|c| c.uuid == uuid(FITPRO_NOTIFY))
            .ok_or("FitPro notify characteristic not found")?;

        // Subscribe to notifications first
        peripheral.subscribe(notify_char).await.map_err(|e| format!("Subscribe: {}", e))?;
        tokio::time::sleep(Duration::from_millis(500)).await;

        // Send PAIR command
        peripheral.write(&write_char, FITPRO_PAIR, WriteType::WithoutResponse)
            .await.map_err(|e| format!("PAIR: {}", e))?;
        tokio::time::sleep(Duration::from_millis(1000)).await;

        // Enable HR switch
        peripheral.write(&write_char, FITPRO_HR_SWITCH_ON, WriteType::WithoutResponse)
            .await.map_err(|e| format!("HR switch: {}", e))?;
        tokio::time::sleep(Duration::from_millis(500)).await;

        // Enable realtime data
        peripheral.write(&write_char, FITPRO_REALTIME_ON, WriteType::WithoutResponse)
            .await.map_err(|e| format!("Realtime: {}", e))?;
        tokio::time::sleep(Duration::from_millis(500)).await;

        // Start measurement
        peripheral.write(&write_char, FITPRO_MEASURE_START, WriteType::WithoutResponse)
            .await.map_err(|e| format!("Measure: {}", e))?;

        Ok(())
    }

    async fn read_notifications(peripheral: Peripheral, device_type: &str) {
        use btleplug::api::Peripheral as _;
        use tokio_stream::StreamExt;

        let mut stream = match peripheral.notifications().await {
            Ok(s) => s,
            Err(e) => { eprintln!("[BLE] notification stream error: {}", e); return; }
        };

        while let Some(notification) = stream.next().await {
            let data = &notification.value;
            let reading = match device_type {
                "hr_standard" => parse_standard_hr(data),
                "fitpro" => parse_fitpro_reading(data),
                _ => None,
            };
            if let Some(mut r) = reading {
                r.timestamp = std::time::SystemTime::now()
                    .duration_since(std::time::UNIX_EPOCH)
                    .unwrap_or_default().as_secs();
                r.device = device_type.to_string();
                let mut state = BLE_STATE.lock().unwrap();
                state.latest_hr = Some(r);
            }
        }

        // Stream ended — device disconnected
        let mut state = BLE_STATE.lock().unwrap();
        state.connected = false;
        state.connected_device = None;
    }

    fn parse_standard_hr(data: &[u8]) -> Option<HrReading> {
        if data.is_empty() { return None; }
        let flags = data[0];
        let hr = if flags & 0x01 == 0 {
            *data.get(1)? as u16
        } else {
            if data.len() < 3 { return None; }
            u16::from_le_bytes([data[1], data[2]])
        };
        if hr == 0 { return None; }
        Some(HrReading { hr, ..Default::default() })
    }

    fn parse_fitpro_reading(data: &[u8]) -> Option<HrReading> {
        if data.len() < 8 || data[0] != 0xCD { return None; }
        let cmd_id = data[3];
        let key_id = data[5];

        // Measure Day Data (cmd=21, key=14): [date 2b][?? 2b][ts 4b][HR][BP_dia][BP_sys][SpO2]
        if cmd_id == 21 && key_id == 14 && data.len() >= 20 {
            let hr = data[16];
            let bp_dia = data[17];
            let bp_sys = data[18];
            let spo2 = data[19];
            if hr > 30 && hr < 220 {
                return Some(HrReading {
                    hr: hr as u16,
                    bp_dia: if bp_dia > 0 { Some(bp_dia) } else { None },
                    bp_sys: if bp_sys > 0 { Some(bp_sys) } else { None },
                    spo2: if spo2 > 0 && spo2 <= 100 { Some(spo2) } else { None },
                    ..Default::default()
                });
            }
        }

        // Realtime data (cmd=21, key=11)
        if cmd_id == 21 && key_id == 11 && data.len() >= 12 {
            for &byte in &data[8..] {
                if byte > 40 && byte < 200 {
                    return Some(HrReading { hr: byte as u16, ..Default::default() });
                }
            }
        }

        None
    }

    pub async fn disconnect_device() -> Result<String, String> {
        let address = {
            let state = BLE_STATE.lock().unwrap();
            state.connected_device.clone()
        };
        if let Some(addr) = address {
            let adapter = get_adapter().await?;
            let peripherals = adapter.peripherals().await.map_err(|e| format!("{}", e))?;
            if let Some(p) = peripherals.into_iter().find(|p| p.address().to_string() == addr) {
                let _ = p.disconnect().await;
            }
        }
        let mut state = BLE_STATE.lock().unwrap();
        state.connected = false;
        state.connected_device = None;
        state.latest_hr = None;
        Ok("Disconnected".to_string())
    }

    pub fn get_latest_hr() -> Option<HrReading> {
        BLE_STATE.lock().unwrap().latest_hr.clone()
    }

    pub fn is_connected() -> bool {
        BLE_STATE.lock().unwrap().connected
    }
}

// --- Tauri commands ---

// --- Android: BLE via Kotlin service + file IPC ---
#[cfg(target_os = "android")]
mod android {
    use super::*;
    use tauri::Manager;
    use std::path::PathBuf;

    fn get_data_dir(app: &tauri::AppHandle) -> Result<PathBuf, String> {
        app.path().app_data_dir().map_err(|e: tauri::Error| e.to_string())
    }

    fn app_root(data_dir: &std::path::Path) -> Option<PathBuf> {
        data_dir.parent().and_then(|p| p.parent()).map(|r| r.to_path_buf())
    }

    pub fn send_command(app: &tauri::AppHandle, cmd: &str) -> Result<(), String> {
        let data_dir = get_data_dir(app)?;
        // Use gps_command.txt — the only file that FileObserver reliably watches
        let cmd_path = data_dir.join("gps_command.txt");
        std::fs::write(&cmd_path, cmd).map_err(|e| e.to_string())?;
        if let Some(root) = app_root(&data_dir) {
            let _ = std::fs::write(root.join("gps_command.txt"), cmd);
        }
        Ok(())
    }

    pub fn read_file(app: &tauri::AppHandle, filename: &str) -> Option<String> {
        let data_dir = get_data_dir(app).ok()?;
        let paths: Vec<PathBuf> = vec![
            data_dir.join(filename),
            app_root(&data_dir).map(|r| r.join(filename)).unwrap_or_default(),
        ];
        for p in &paths {
            if p.exists() {
                if let Ok(s) = std::fs::read_to_string(p) {
                    if !s.trim().is_empty() { return Some(s); }
                }
            }
        }
        None
    }

    pub fn read_scan_results(app: &tauri::AppHandle) -> Result<Vec<BleDevice>, String> {
        if let Some(s) = read_file(app, "ble_scan_results.json") {
            if let Ok(devices) = serde_json::from_str::<Vec<BleDevice>>(&s) {
                return Ok(devices);
            }
        }
        Ok(vec![])
    }

    pub fn read_hr_data(app: &tauri::AppHandle) -> Result<Option<HrReading>, String> {
        if let Some(s) = read_file(app, "ble_hr_data.json") {
            if let Ok(r) = serde_json::from_str::<HrReading>(&s) {
                if r.hr > 0 { return Ok(Some(r)); }
            }
        }
        Ok(None)
    }

    pub fn read_baro_data(app: &tauri::AppHandle) -> Result<Option<BaroReading>, String> {
        if let Some(s) = read_file(app, "ble_baro_data.json") {
            if let Ok(r) = serde_json::from_str::<BaroReading>(&s) {
                if r.pressure_pa > 0.0 { return Ok(Some(r)); }
            }
        }
        Ok(None)
    }
}

// --- Tauri commands ---

#[tauri::command]
pub async fn ble_scan(
    app: tauri::AppHandle,
    duration_secs: Option<u64>,
) -> Result<Vec<BleDevice>, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; desktop::scan_devices(duration_secs.unwrap_or(5)).await }
    #[cfg(target_os = "android")]
    {
        let _ = duration_secs;
        android::send_command(&app, "ble_scan")?;
        // Return immediately — JS will call ble_scan_results after delay
        Ok(vec![])
    }
}

#[tauri::command]
pub fn ble_scan_results(app: tauri::AppHandle) -> Result<Vec<BleDevice>, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok(vec![]) } // desktop returns results directly from ble_scan
    #[cfg(target_os = "android")]
    { android::read_scan_results(&app) }
}

#[tauri::command]
pub async fn ble_connect(
    app: tauri::AppHandle,
    address: String,
    device_type: String,
) -> Result<String, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; desktop::connect_device(&address, &device_type).await }
    #[cfg(target_os = "android")]
    {
        android::send_command(&app, &format!("ble_connect:{}:{}", address, device_type))?;
        Ok(format!("Connecting to {}", address))
    }
}

#[tauri::command]
pub async fn ble_disconnect(
    app: tauri::AppHandle,
) -> Result<String, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; desktop::disconnect_device().await }
    #[cfg(target_os = "android")]
    {
        android::send_command(&app, "ble_disconnect")?;
        Ok("Disconnecting".to_string())
    }
}

// Ask the OS to turn Bluetooth on (system ACTION_REQUEST_ENABLE dialog). BLUETOOTH_CONNECT is
// already granted, so no extra permission. Called when the user taps "Подключить" with BT off.
#[tauri::command]
pub async fn ble_request_enable(
    app: tauri::AppHandle,
) -> Result<String, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok("desktop: no-op".to_string()) }
    #[cfg(target_os = "android")]
    {
        android::send_command(&app, "ble_request_enable")?;
        Ok("Requesting enable".to_string())
    }
}

#[tauri::command]
pub fn ble_get_hr(
    app: tauri::AppHandle,
) -> Result<Option<HrReading>, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok(desktop::get_latest_hr()) }
    #[cfg(target_os = "android")]
    { android::read_hr_data(&app) }
}

// Latest barometer reading (BaroBalDav). Android: read from the file the Kotlin BLE service writes.
// Desktop: not wired (btleplug baro path not implemented) — returns None.
#[tauri::command]
pub fn ble_get_baro(
    app: tauri::AppHandle,
) -> Result<Option<BaroReading>, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok(None) }
    #[cfg(target_os = "android")]
    { android::read_baro_data(&app) }
}

// Full HR history for the current workout. The Kotlin foreground service appends every
// reading to ble_hr_log.jsonl (one {"hr","ts"[,"bat"]} per line) — that keeps logging with
// the screen off, unlike the JS poll which Android freezes in the background. The workout
// recorder reads this at finalize to rebuild a gap-free sample series. Returns "" if none.
#[tauri::command]
pub fn ble_read_hr_log(app: tauri::AppHandle) -> Result<String, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok(String::new()) }
    #[cfg(target_os = "android")]
    { Ok(android::read_file(&app, "ble_hr_log.jsonl").unwrap_or_default()) }
}

// Strap usage accounting (strap_uptime.json): total time the strap actually delivered HR plus
// battery-level steps, accumulated by the foreground service across sessions (persistent — so we
// can compute real battery life ourselves). Returns "{}" if none yet.
#[tauri::command]
pub fn ble_read_strap_uptime(app: tauri::AppHandle) -> Result<String, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok("{}".to_string()) }
    #[cfg(target_os = "android")]
    { Ok(android::read_file(&app, "strap_uptime.json").unwrap_or_else(|| "{}".to_string())) }
}

// Reset the usage counter — call when the strap is put on charge / newly charged.
#[tauri::command]
pub fn ble_reset_strap_uptime(app: tauri::AppHandle) -> Result<(), String> {
    use tauri::Manager;
    let data_dir = app.path().app_data_dir().map_err(|e: tauri::Error| e.to_string())?;
    let now = std::time::SystemTime::now()
        .duration_since(std::time::UNIX_EPOCH).unwrap_or_default().as_secs();
    let fresh = format!("{{\"active_sec\":0,\"since\":{},\"steps\":[]}}", now);
    let _ = std::fs::write(data_dir.join("strap_uptime.json"), &fresh);
    if let Some(root) = data_dir.parent().and_then(|p| p.parent()) {
        let _ = std::fs::write(root.join("strap_uptime.json"), &fresh);
    }
    Ok(())
}

#[tauri::command]
pub fn ble_is_connected(
    app: tauri::AppHandle,
) -> Result<bool, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok(desktop::is_connected()) }
    #[cfg(target_os = "android")]
    {
        match android::read_hr_data(&app) {
            Ok(Some(r)) => {
                let now = std::time::SystemTime::now()
                    .duration_since(std::time::UNIX_EPOCH).unwrap_or_default().as_secs();
                Ok(now - r.timestamp < 30)
            }
            _ => Ok(false)
        }
    }
}

#[tauri::command]
pub fn ble_clear_hr(app: tauri::AppHandle) -> Result<(), String> {
    use tauri::Manager;
    let data_dir = app.path().app_data_dir().map_err(|e: tauri::Error| e.to_string())?;
    // Clear HR data file so stale values don't show on next session, and truncate the
    // native HR history log (the foreground service appends every reading there — see
    // ble_read_hr_log) so a new workout starts from an empty log.
    let _ = std::fs::write(data_dir.join("ble_hr_data.json"), "{}");
    let _ = std::fs::write(data_dir.join("ble_hr_log.jsonl"), "");
    if let Some(root) = data_dir.parent().and_then(|p| p.parent()) {
        let _ = std::fs::write(root.join("ble_hr_data.json"), "{}");
        let _ = std::fs::write(root.join("ble_hr_log.jsonl"), "");
    }
    #[cfg(not(target_os = "android"))]
    {
        let mut state = BLE_STATE.lock().unwrap();
        state.latest_hr = None;
    }
    Ok(())
}

#[tauri::command]
pub fn ble_save_device(app: tauri::AppHandle, address: String, device_type: String) -> Result<(), String> {
    use tauri::Manager;
    let data_dir = app.path().app_data_dir().map_err(|e: tauri::Error| e.to_string())?;
    let json = format!(r#"{{"addr":"{}","type":"{}"}}"#, address, device_type);
    // Write to app_data_dir
    std::fs::write(data_dir.join("ble_device.json"), &json).ok();
    // Write to app root (Android: Kotlin reads from here)
    if let Some(root) = data_dir.parent().and_then(|p| p.parent()) {
        std::fs::write(root.join("ble_device.json"), &json).ok();
    }
    Ok(())
}

// Disconnect ONLY the barometer (its own service), leaving the HR strap connected.
#[tauri::command]
pub async fn ble_baro_disconnect(app: tauri::AppHandle) -> Result<String, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok("desktop: no-op".to_string()) }
    #[cfg(target_os = "android")]
    { android::send_command(&app, "baro_disconnect")?; Ok("Disconnecting baro".to_string()) }
}

// Persist the paired barometer so the Kotlin side auto-connects it at start (separate from the HR
// device file). Empty address clears it.
#[tauri::command]
pub fn ble_save_baro_device(app: tauri::AppHandle, address: String) -> Result<(), String> {
    use tauri::Manager;
    let data_dir = app.path().app_data_dir().map_err(|e: tauri::Error| e.to_string())?;
    let json = format!(r#"{{"addr":"{}","type":"baro"}}"#, address);
    std::fs::write(data_dir.join("baro_device.json"), &json).ok();
    if let Some(root) = data_dir.parent().and_then(|p| p.parent()) {
        std::fs::write(root.join("baro_device.json"), &json).ok();
    }
    Ok(())
}

#[tauri::command]
pub fn ble_check_bluetooth(
    app: tauri::AppHandle,
) -> Result<String, String> {
    #[cfg(not(target_os = "android"))]
    { let _ = &app; Ok("on".to_string()) } // desktop: assume BT available
    #[cfg(target_os = "android")]
    {
        // Read bt_state.txt written by Kotlin
        if let Some(s) = android::read_file(&app, "bt_state.txt") {
            Ok(s.trim().to_string())
        } else {
            Ok("unknown".to_string())
        }
    }
}