export interface GpsTelemetry {
  has_fix: boolean
  utc_time: string
  latitude: number | null
  longitude: number | null
  satellites: number | null
  altitude_m: number | null
  coordinate_system: string
  source_sentence: string
  raw_coordinate_format: string
  source_mode: string
  updated_at: string
}

export interface SessionAppStats {
  connected: number
  send_calls?: number
  send_bytes?: number
  send_errors?: number
  recv_calls?: number
  recv_bytes?: number
  recv_timeouts?: number
  recv_errors?: number
}

export interface SessionKcpStats {
  connected?: number
  conv?: number
  rto_ms?: number
  srtt_ms?: number
  srttvar_ms?: number
  snd_queue?: number
  rcv_queue?: number
  snd_buffer?: number
  xmit_total?: number
}

export interface SessionTelemetry {
  app: SessionAppStats
  kcp: SessionKcpStats
}

export interface NativeUdpIngress {
  started: boolean
  bind_addr: string
  packets_received: number
  invalid_packets: number
  last_sender: string
  last_error: string
}

export interface ControlArbiterStatus {
  active_source: string | null
  control_lease_remaining_ms: number
  packet_counts: Record<string, number>
  send_rate_hz: number
  source_lease_ms: number
  zero_burst_packets: number
  last_error: string
  last_sent_at_monotonic: number
}

export interface ControlSenderStatus {
  backend_ready: boolean
  started: boolean
  connected: boolean
  peer_id: string
  target_peer: string
  send_count: number
  send_errors: number
  drain_errors: number
  last_error: string
}

export interface NetworkTelemetry {
  peer_status: string
  latency_ms: number | null
  jitter_ms: number | null
  packet_loss_pct: number | null
  tx_kbps: number
  rx_kbps: number
  transport: string
  source_mode: string
  updated_at: string
  active_control_source: string | null
  control_lease_remaining_ms: number
  combined: {
    connected_sessions: number
    send_bytes: number
    recv_bytes: number
    tx_kbps: number
    rx_kbps: number
  }
  sessions: {
    video: SessionTelemetry
    control: SessionTelemetry
  }
  ingress: {
    native_udp: NativeUdpIngress
  }
  control: {
    arbiter: ControlArbiterStatus
    sender: ControlSenderStatus
  }
}

export interface VideoStatus {
  available: boolean
  source_mode: string
  frame_count: number
  fps: number
  frame_dir: string
  source_detail?: string
  timing?: {
    available: boolean
    latest_delta_ms: number | null
    delta_samples_ms: number[]
    sample_count: number
    sample_window_size: number
    timestamp_unit: string | null
    timestamp_endianness: string | null
  }
  receiver?: {
    backend_ready: boolean
    mode: string
    connected: boolean
    has_recent_frame: boolean
    frames_received: number
    latest_sequence: number | null
    last_error: string
    config_path: string
    server_addr?: string
    relay_via?: string
    peer_id?: string
    buffer_bytes?: number
    timing?: {
      available: boolean
      latest_delta_ms: number | null
      delta_samples_ms: number[]
      sample_count: number
      sample_window_size: number
      timestamp_unit: string | null
      timestamp_endianness: string | null
    }
  }
}

export interface DashboardSnapshot {
  gps: GpsTelemetry
  network: NetworkTelemetry
  video: VideoStatus
}