heldar_kernel/

config.rs

use std::env;
use std::path::PathBuf;

/// Runtime configuration, loaded from environment (see `.env.example`).
#[derive(Clone, Debug)]
pub struct Config {
    pub database_url: String,
    pub data_dir: PathBuf,
    pub recordings_dir: PathBuf,
    pub clips_dir: PathBuf,
    pub snapshots_dir: PathBuf,
    pub frames_dir: PathBuf,
    /// Directory where segment-spanning HLS playback sessions are generated (one subdir per session).
    pub playback_dir: PathBuf,
    pub ffmpeg_bin: String,
    pub ffprobe_bin: String,
    pub mediamtx_api_url: String,
    pub mediamtx_hls_base: String,
    pub mediamtx_rtsp_base: String,
    pub mediamtx_webrtc_base: String,
    /// Max SQLite pool connections. Tunable per deployment: more absorbs bursts of concurrent
    /// requests (WAL serves reads concurrently; writes still serialize), at the cost of memory.
    pub db_max_connections: u32,
    pub recorder_enabled: bool,
    /// Optional second recordings root for dual/mirror recording. When set, cameras with
    /// `mirror_enabled` get a SECOND ffmpeg pipeline writing byte-identical segments here (a redundant
    /// DVR copy on a separate volume). Empty/unset disables mirror recording entirely.
    pub mirror_recordings_dir: Option<PathBuf>,
    /// Master switch for ANR (Automatic Network Replenishment) edge re-fill: re-fetch missed footage
    /// from a camera's onboard storage to fill recording gaps. Cameras still need `anr_enabled`.
    pub anr_enabled: bool,
    /// How often the ANR loop scans for pending gaps to fill (seconds).
    pub anr_interval_s: u64,
    /// Ignore gaps older than this many hours (most cameras only retain recent onboard footage).
    pub anr_max_gap_hours: i64,
    /// Give up on a gap after this many fill attempts (marked `failed`).
    pub anr_max_attempts: i64,
    pub default_segment_seconds: i64,
    pub default_retention_hours: i64,
    /// Default per-camera storage quota (bytes) applied when a camera is created without an explicit
    /// `storage_quota_bytes`. 0 means no default quota (the camera's quota is stored as NULL).
    pub default_camera_quota_bytes: u64,
    /// Default audio-recording toggle applied when a camera is created without an explicit
    /// `record_audio`. When false (default) the recorder drops audio (video only).
    pub default_record_audio: bool,
    /// Default pre-roll seconds applied when a camera is created without an explicit
    /// `pre_roll_seconds` (event / scheduled_event recording). Clamped to 0..300 in handlers.
    pub default_pre_roll_seconds: i64,
    /// Default post-roll seconds (the trigger recording window) applied when a camera is created
    /// without an explicit `post_roll_seconds`. Clamped to 0..3600 in handlers.
    pub default_post_roll_seconds: i64,
    pub indexer_interval_s: u64,
    pub health_interval_s: u64,
    pub retention_interval_s: u64,
    pub api_host: String,
    pub api_port: u16,
    pub cors_origins: Vec<String>,
    /// Soft cap on total recording footprint; oldest unlocked segments are pruned above this.
    pub max_recordings_bytes: u64,
    /// Hard floor on free disk space; when free space drops below this, oldest unlocked segments
    /// are pruned regardless of age/size policy (protects the host from a full disk).
    pub min_free_disk_bytes: u64,
    /// Optional webhook URL that receives warning/critical events as JSON (alerting).
    pub alert_webhook_url: Option<String>,
    /// How often the alert notifier polls for new events to deliver.
    pub notifier_interval_s: u64,
    /// Master switch for AI frame sampling (Stage 2). Cameras still need an enabled AI task.
    pub ai_enabled: bool,
    /// Global frame-sampling budget (frames/sec summed across all cameras); per-camera fps is
    /// reduced proportionally above this so adding AI cameras degrades fps instead of overloading.
    pub ai_max_total_fps: f64,
    pub default_ai_fps: f64,
    pub default_ai_width: i64,
    /// How long detection rows are kept before the retention sweeper prunes them.
    pub detection_retention_hours: i64,
    // ---- Scheduled interval snapshots ----
    /// Master switch for the background snapshot scheduler (interval live-frame captures).
    pub snapshot_scheduler_enabled: bool,
    /// How often the scheduler ticks to look for due schedules (seconds).
    pub snapshot_scheduler_interval_s: u64,
    /// How long captured snapshots are kept before the retention sweeper prunes them. 0 = no pruning.
    pub snapshot_retention_hours: i64,
    // ---- Per-camera recording schedule (time-of-day windows) ----
    /// How often the schedule watcher ticks to open/close recording windows for `scheduled` /
    /// `scheduled_event` cameras (seconds). Windows are evaluated against the SERVER's LOCAL timezone.
    pub schedule_check_interval_s: u64,
    // ---- Segment-spanning HLS playback sessions (kernel platform feature) ----
    /// How long a generated playback session (its HLS dir + the segment read-locks it holds) is
    /// retained before the cleanup sweeper removes the dir and releases its locks. Server time.
    pub playback_session_ttl_minutes: i64,
    /// Maximum playback session span (seconds); a longer requested range is rejected (HTTP 400).
    pub max_playback_seconds: f64,
    // ---- Auth / RBAC (kernel platform feature) ----
    /// Master switch for authentication + RBAC. When false, the API is open (dev/single-tenant
    /// LAN appliance default) and a synthetic admin principal is used. When true, the auth/admin
    /// surface requires a valid bearer token (session or API key) and enforces roles.
    pub auth_enabled: bool,
    /// Lifetime of an issued login session token.
    pub session_ttl_hours: i64,
    /// Add `Secure` to the session cookie (require HTTPS). Default false for HTTP LAN/overlay
    /// appliances; set true when the deployment is served over TLS.
    pub auth_cookie_secure: bool,
    /// Optional first-run admin bootstrap (only used when no users exist yet).
    pub bootstrap_admin_user: Option<String>,
    pub bootstrap_admin_password: Option<String>,
    /// How long kernel audit-log + generic-event rows are kept before retention prunes them.
    pub audit_retention_days: i64,
    // ---- Remote-access overlay (kernel platform feature; see docs/REMOTE-ACCESS.md) ----
    /// Whether this deployment is reached through a WireGuard overlay (Tailscale / NetBird /
    /// wireguard) running as an external daemon on the host. The kernel does not manage the
    /// overlay; it only reports whether the configured interface is present + up so the dashboard
    /// can surface remote-access health. When false, the deployment is LAN-only.
    pub overlay_enabled: bool,
    /// Label for the overlay in use: `tailscale` | `netbird` | `wireguard` | `none`.
    pub overlay_kind: String,
    /// The overlay's network interface to probe (e.g. `tailscale0`, `wt0`, `wg0`).
    pub overlay_iface: Option<String>,
    // ---- Backup subsystem (kernel platform feature) ----
    /// Path to the `rclone` binary used for sftp/ftp/s3 remote backups. Local/NAS-mount backups use
    /// std fs copy and never need it; remote backups degrade to a clear job error when it is missing.
    pub rclone_bin: String,
    /// Master switch for the background backup scheduler (scheduled policy jobs). On-demand archive
    /// export still works when this is false.
    pub backup_enabled: bool,
    /// How often the backup scheduler ticks to look for due policies (seconds).
    pub backup_scheduler_interval_s: u64,
    /// Hard timeout for a single backup job's transfer (seconds); a job exceeding it is marked error.
    pub backup_job_timeout_s: u64,
    /// Maximum number of backup jobs running concurrently (a tokio Semaphore bounds the scheduler +
    /// manual triggers).
    pub backup_max_concurrent_jobs: usize,
    /// Where on-demand archive (.zip) exports are written; also served at `/media/archives`.
    pub archive_dir: PathBuf,
    /// Maximum total source footprint (sum of segment sizes) for a single archive export; a larger
    /// selection is rejected (HTTP 400).
    pub archive_max_bytes: u64,
    /// How long archive exports + finished backup-job rows are kept before retention prunes them.
    pub archive_retention_hours: i64,
    // ---- ONVIF (kernel platform feature; Profile S MVP) ----
    /// How long the WS-Discovery probe listens for ProbeMatch replies (milliseconds).
    pub onvif_discovery_timeout_ms: u64,
    /// Per-request timeout for an ONVIF SOAP call (GetDeviceInformation, PTZ, etc.) in milliseconds.
    pub onvif_request_timeout_ms: u64,
    // ---- Disk / array health (HA ops; see docs/HA.md) ----
    /// Run periodic SMART self-assessment checks (`smartctl -H`) inside the health loop. Off by
    /// default; needs `smartmontools` on PATH. Missing binary degrades to a one-time log + skip.
    pub smart_check_enabled: bool,
    /// Block devices to query when SMART checks are enabled (e.g. `/dev/sda,/dev/sdb`).
    pub smart_devices: Vec<String>,
    /// Watch `/proc/mdstat` (Linux md/RAID) and emit `raid_degraded` when an array shows a down member.
    pub mdstat_check_enabled: bool,
    /// Cadence of the disk-health (SMART/RAID) check inside the health loop (seconds).
    pub smart_check_interval_s: u64,
    // ---- Readiness HA probe (see docs/HA.md) ----
    /// When > 0, `/readyz` also requires at least this percent of enabled cameras to be actively
    /// recording (503 `insufficient_recorders` otherwise). 0 (default) keeps DB-connectivity-only.
    pub readyz_min_recording_percent: f64,
    // ---- Live preview transcode (HEVC->H.264) hardware acceleration ----
    /// Encoder engine for the live preview transcode path: `software` (libx264, default), `vaapi`,
    /// or `nvenc`. Unknown values warn and fall back to software.
    pub live_transcode_engine: String,
    /// VAAPI render node used when `live_transcode_engine = vaapi`.
    pub vaapi_device: String,
    // ---- Fleet / multi-site identity ----
    /// Optional site identifier stamped onto outbox rows and surfaced at `GET /api/v1/site` for the
    /// edge->cloud fleet uplink. Empty/unset = a single unnamed site.
    pub site_id: Option<String>,
}

fn var(key: &str) -> Option<String> {
    env::var(key).ok().filter(|s| !s.trim().is_empty())
}

fn var_or(key: &str, default: &str) -> String {
    var(key).unwrap_or_else(|| default.to_string())
}

fn parse_or<T: std::str::FromStr>(key: &str, default: T) -> T {
    var(key).and_then(|v| v.parse().ok()).unwrap_or(default)
}

fn parse_bool(key: &str, default: bool) -> bool {
    match var(key) {
        Some(v) => matches!(v.to_ascii_lowercase().as_str(), "1" | "true" | "yes" | "on"),
        None => default,
    }
}

impl Config {
    pub fn from_env() -> Self {
        let data_dir = PathBuf::from(var_or("HELDAR_DATA_DIR", "./data"));
        let recordings_dir = var("HELDAR_RECORDINGS_DIR")
            .map(PathBuf::from)
            .unwrap_or_else(|| data_dir.join("recordings"));
        let clips_dir = var("HELDAR_CLIPS_DIR")
            .map(PathBuf::from)
            .unwrap_or_else(|| data_dir.join("clips"));
        let snapshots_dir = var("HELDAR_SNAPSHOTS_DIR")
            .map(PathBuf::from)
            .unwrap_or_else(|| data_dir.join("snapshots"));
        let frames_dir = var("HELDAR_FRAMES_DIR")
            .map(PathBuf::from)
            .unwrap_or_else(|| data_dir.join("frames"));
        let playback_dir = var("HELDAR_PLAYBACK_DIR")
            .map(PathBuf::from)
            .unwrap_or_else(|| data_dir.join("playback"));
        let archive_dir = var("HELDAR_ARCHIVE_DIR")
            .map(PathBuf::from)
            .unwrap_or_else(|| data_dir.join("archives"));

        let cors_origins = var_or("HELDAR_CORS_ORIGINS", "http://localhost:5173")
            .split(',')
            .map(|s| s.trim().to_string())
            .filter(|s| !s.is_empty())
            .collect();

        let max_recordings_gb: f64 = parse_or("HELDAR_MAX_RECORDINGS_GB", 20.0);
        let min_free_disk_gb: f64 = parse_or("HELDAR_MIN_FREE_DISK_GB", 5.0);
        let default_camera_quota_gb: f64 = parse_or("HELDAR_DEFAULT_CAMERA_QUOTA_GB", 0.0);

        Config {
            database_url: var_or("HELDAR_DATABASE_URL", "sqlite://./data/heldar.db"),
            data_dir,
            recordings_dir,
            clips_dir,
            snapshots_dir,
            frames_dir,
            playback_dir,
            ffmpeg_bin: var_or("HELDAR_FFMPEG_BIN", "ffmpeg"),
            ffprobe_bin: var_or("HELDAR_FFPROBE_BIN", "ffprobe"),
            mediamtx_api_url: var_or("HELDAR_MEDIAMTX_API_URL", "http://127.0.0.1:9997"),
            mediamtx_hls_base: var_or("HELDAR_MEDIAMTX_HLS_BASE", "http://127.0.0.1:8888"),
            mediamtx_rtsp_base: var_or("HELDAR_MEDIAMTX_RTSP_BASE", "rtsp://127.0.0.1:8554"),
            mediamtx_webrtc_base: var_or("HELDAR_MEDIAMTX_WEBRTC_BASE", "http://127.0.0.1:8889"),
            db_max_connections: parse_or::<u32>("HELDAR_DB_MAX_CONNECTIONS", 16).clamp(2, 256),
            recorder_enabled: parse_bool("HELDAR_RECORDER_ENABLED", true),
            mirror_recordings_dir: var("HELDAR_MIRROR_RECORDINGS_DIR").map(PathBuf::from),
            anr_enabled: parse_bool("HELDAR_ANR_ENABLED", false),
            anr_interval_s: parse_or("HELDAR_ANR_INTERVAL_S", 300),
            anr_max_gap_hours: parse_or("HELDAR_ANR_MAX_GAP_HOURS", 24),
            anr_max_attempts: parse_or("HELDAR_ANR_MAX_ATTEMPTS", 3),
            default_segment_seconds: parse_or("HELDAR_DEFAULT_SEGMENT_SECONDS", 60),
            default_retention_hours: parse_or("HELDAR_DEFAULT_RETENTION_HOURS", 24),
            default_camera_quota_bytes: (default_camera_quota_gb * 1024.0 * 1024.0 * 1024.0) as u64,
            default_record_audio: parse_bool("HELDAR_DEFAULT_RECORD_AUDIO", false),
            default_pre_roll_seconds: parse_or("HELDAR_DEFAULT_PRE_ROLL_SECONDS", 10),
            default_post_roll_seconds: parse_or("HELDAR_DEFAULT_POST_ROLL_SECONDS", 30),
            indexer_interval_s: parse_or("HELDAR_INDEXER_INTERVAL_S", 10),
            health_interval_s: parse_or("HELDAR_HEALTH_INTERVAL_S", 15),
            retention_interval_s: parse_or("HELDAR_RETENTION_INTERVAL_S", 300),
            api_host: var_or("HELDAR_API_HOST", "0.0.0.0"),
            api_port: parse_or("HELDAR_API_PORT", 8000),
            cors_origins,
            max_recordings_bytes: (max_recordings_gb * 1024.0 * 1024.0 * 1024.0) as u64,
            min_free_disk_bytes: (min_free_disk_gb * 1024.0 * 1024.0 * 1024.0) as u64,
            alert_webhook_url: var("HELDAR_ALERT_WEBHOOK_URL"),
            notifier_interval_s: parse_or("HELDAR_NOTIFIER_INTERVAL_S", 15),
            ai_enabled: parse_bool("HELDAR_AI_ENABLED", true),
            ai_max_total_fps: parse_or("HELDAR_AI_MAX_TOTAL_FPS", 40.0),
            default_ai_fps: parse_or("HELDAR_DEFAULT_AI_FPS", 5.0),
            default_ai_width: parse_or("HELDAR_DEFAULT_AI_WIDTH", 1280),
            detection_retention_hours: parse_or("HELDAR_DETECTION_RETENTION_HOURS", 168),
            snapshot_scheduler_enabled: parse_bool("HELDAR_SNAPSHOT_SCHEDULER_ENABLED", true),
            snapshot_scheduler_interval_s: parse_or("HELDAR_SNAPSHOT_SCHEDULER_INTERVAL_S", 60),
            snapshot_retention_hours: parse_or("HELDAR_SNAPSHOT_RETENTION_HOURS", 168),
            schedule_check_interval_s: parse_or("HELDAR_SCHEDULE_CHECK_INTERVAL_S", 30),
            playback_session_ttl_minutes: parse_or("HELDAR_PLAYBACK_SESSION_TTL_MINUTES", 60),
            max_playback_seconds: parse_or("HELDAR_MAX_PLAYBACK_SECONDS", 7200.0),
            auth_enabled: parse_bool("HELDAR_AUTH_ENABLED", false),
            session_ttl_hours: parse_or("HELDAR_SESSION_TTL_HOURS", 12),
            auth_cookie_secure: parse_bool("HELDAR_AUTH_COOKIE_SECURE", false),
            bootstrap_admin_user: var("HELDAR_BOOTSTRAP_ADMIN_USER"),
            bootstrap_admin_password: var("HELDAR_BOOTSTRAP_ADMIN_PASSWORD"),
            audit_retention_days: parse_or("HELDAR_AUDIT_RETENTION_DAYS", 365),
            overlay_enabled: parse_bool("HELDAR_OVERLAY_ENABLED", false),
            overlay_kind: var_or("HELDAR_OVERLAY_KIND", "none"),
            overlay_iface: var("HELDAR_OVERLAY_IFACE"),
            rclone_bin: var_or("HELDAR_RCLONE_BIN", "rclone"),
            backup_enabled: parse_bool("HELDAR_BACKUP_ENABLED", true),
            backup_scheduler_interval_s: parse_or("HELDAR_BACKUP_SCHEDULER_INTERVAL_S", 60),
            backup_job_timeout_s: parse_or("HELDAR_BACKUP_JOB_TIMEOUT_S", 3600),
            backup_max_concurrent_jobs: parse_or::<usize>("HELDAR_BACKUP_MAX_CONCURRENT_JOBS", 2)
                .max(1),
            archive_dir,
            archive_max_bytes: parse_or("HELDAR_ARCHIVE_MAX_BYTES", 10_737_418_240u64),
            archive_retention_hours: parse_or("HELDAR_ARCHIVE_RETENTION_HOURS", 48),
            onvif_discovery_timeout_ms: parse_or("HELDAR_ONVIF_DISCOVERY_TIMEOUT_MS", 2000),
            onvif_request_timeout_ms: parse_or("HELDAR_ONVIF_REQUEST_TIMEOUT_MS", 5000),
            smart_check_enabled: parse_bool("HELDAR_SMART_CHECK_ENABLED", false),
            smart_devices: var("HELDAR_SMART_DEVICES")
                .map(|v| {
                    v.split(',')
                        .map(|s| s.trim().to_string())
                        .filter(|s| !s.is_empty())
                        .collect()
                })
                .unwrap_or_default(),
            mdstat_check_enabled: parse_bool("HELDAR_MDSTAT_CHECK_ENABLED", false),
            smart_check_interval_s: parse_or("HELDAR_SMART_CHECK_INTERVAL_S", 300),
            readyz_min_recording_percent: parse_or("HELDAR_READYZ_MIN_RECORDING_PERCENT", 0.0),
            live_transcode_engine: var_or("HELDAR_LIVE_TRANSCODE_ENGINE", "software"),
            vaapi_device: var_or("HELDAR_VAAPI_DEVICE", "/dev/dri/renderD128"),
            site_id: var("HELDAR_SITE_ID"),
        }
    }

    /// Directory where a camera's segments are stored.
    pub fn camera_recordings_dir(&self, camera_id: &str) -> PathBuf {
        self.recordings_dir.join(camera_id)
    }

    /// Directory where a camera's sampled AI frames are written.
    pub fn camera_frames_dir(&self, camera_id: &str) -> PathBuf {
        self.frames_dir.join(camera_id)
    }
}