from __future__ import annotations

from dataclasses import dataclass


@dataclass(frozen=True)
class RealtimeDiagnostics:
    backend_id: str
    backend_name: str
    output_enabled: bool
    worker_running: bool
    target_output_fps: float
    render_fps: float
    send_fps: float
    last_render_time_ms: float
    last_send_time_ms: float
    frames_rendered: int
    frames_submitted: int
    frames_sent: int
    stale_frame_drops: int
    send_failures: int
    packets_last_frame: int
    devices_last_frame: int
    packets_sent_total: int
    last_output_message: str = ""
    send_budget_misses: int = 0
    last_schedule_slip_ms: float = 0.0
    controller_fps: float | None = None
    controller_live_devices: int = 0
    controller_sampled_devices: int = 0
    controller_total_devices: int = 0
    controller_source: str = ""