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import clsx from "clsx";
import { CircleCheck, CircleX } from "lucide-react";
import { ToolbarStatusIcon } from "@/components/ui/toolbar-status-icon";
import { StatusDot } from "@/components/ui/status-dot";
import { getStatusTextClass, type ApplicationStatus } from "@/lib/status-semantics";
import type { SimulationStatus, ClientState } from "@shared/types/arduino.types";
import type { CompilationStatus } from "@/types/compilation.types";
import type { ConnectionState } from "@/lib/websocket-manager";
// ── Constants ─────────────────────────────────────────────────────────────────
/** Minimum ms any state label stays visible before switching to a new one. */
const STATE_MIN_MS = 600;
// ── Pure helpers ──────────────────────────────────────────────────────────────
function deriveClientState(
simulationStatus: SimulationStatus,
compilationStatus: CompilationStatus,
pendingExternalStart: boolean = false,
): ClientState {
// pendingExternalStart means START_SIMULATION was received before the WS
// connected (or before the backend was reachable). The instance is waiting
// for the compile + WS handshake phase — NOT for a simulation runner slot.
// Without this check, simulationStatus === "queued" (set client-side by
// handleExternalStartSimulation) would make the badge show QUEUED_FOR_SIMULATION
// while the instance is actually queued for compilation.
Iif (pendingExternalStart) return "QUEUED_FOR_COMPILING";
if (compilationStatus === "compiling") return "COMPILING";
if (simulationStatus === "queued") return "QUEUED_FOR_SIMULATION";
if (simulationStatus === "running") return "RUNNING";
if (simulationStatus === "paused") return "PAUSED";
if (compilationStatus === "error") return "ERROR";
return "IDLE";
}
function clientStateTone(state: ClientState): ApplicationStatus {
switch (state) {
case "RUNNING": return "success";
case "PAUSED": return "warning";
case "RUNNING_STARTING":
case "COMPILING":
case "QUEUED_FOR_COMPILING":
case "QUEUED_FOR_SIMULATION": return "busy";
case "ERROR": return "error";
default: return "idle";
}
}
function clientStateColor(state: ClientState): string {
return getStatusTextClass(clientStateTone(state));
}
function compilationStatusTone(status: CompilationStatus): ApplicationStatus {
if (status === "compiling") return "busy";
if (status === "error") return "error";
return "success";
}
function compilationStatusLabel(status: CompilationStatus): string {
switch (status) {
case "ready": return "HTTP ready";
case "compiling": return "HTTP compiling";
case "success": return "HTTP success";
case "error": return "HTTP error";
}
}
/** WS status is based on connection state only, not simulation telemetry. */
function wsStatusTone(wsState: ConnectionState, hasEverConnected: boolean): ApplicationStatus {
if (wsState === "connected") return "success";
if (wsState === "connecting" || wsState === "reconnecting") return "busy";
return hasEverConnected ? "error" : "idle";
}
function wsStatusLabel(wsState: ConnectionState, hasEverConnected: boolean): string {
if (wsState === "connected") return "WebSocket connected";
if (wsState === "connecting") return "WebSocket connecting";
if (wsState === "reconnecting") return "WebSocket reconnecting";
return hasEverConnected ? "WebSocket disconnected" : "WebSocket not connected";
}
/** True when WS previously connected but is now disconnected/lost. */
function isWsError(wsState: ConnectionState, hasEverConnected: boolean): boolean {
if (wsState === "connected" || wsState === "connecting" || wsState === "reconnecting") return false;
return hasEverConnected;
}
// ── Sub-components ────────────────────────────────────────────────────────────
interface StatCellProps {
readonly label: string;
readonly value: React.ReactNode;
readonly valueClass?: string;
}
/** A compact 2-row stat cell: dim label on top, bright value below. */
function StatCell({ label, value, valueClass }: StatCellProps) {
return (
<div className="flex flex-col items-start leading-tight">
<span
className="uppercase tracking-wider text-cyan-500/50 whitespace-nowrap"
style={{ fontSize: "calc(9px * var(--ui-font-scale))" }}
>
{label}
</span>
<span
className={clsx("font-bold font-mono whitespace-nowrap", valueClass ?? "text-white/50")}
style={{ fontSize: "calc(11px * var(--ui-font-scale))" }}
>
{value}
</span>
</div>
);
}
function ColSep() {
return <div className="w-px h-5 bg-white/10 self-center mx-0.5 shrink-0" />;
}
// ── Component interface ───────────────────────────────────────────────────────
interface SimCockpitProps {
batchStats?: unknown;
simulationStatus?: SimulationStatus;
compilationStatus?: CompilationStatus;
workerIndex?: number;
workerTotal?: number;
backendReachable?: boolean;
isConnected?: boolean;
wsConnectionState?: ConnectionState;
wsHasEverConnected?: boolean;
baudRate?: number;
debugMode?: boolean;
/** When true, a START_SIMULATION arrived before the WS connected; the instance
* is waiting for compilation, not for a simulation runner slot. Without this
* flag deriveClientState incorrectly shows QUEUED_FOR_SIMULATION instead of
* QUEUED_FOR_COMPILING because simulationStatus is set to "queued" client-side
* by handleExternalStartSimulation. */
pendingExternalStart?: boolean;
/** @deprecated kept for prop compatibility; no longer used for WS dot logic */
serverStatus?: unknown;
}
export const SimCockpit: React.FC<SimCockpitProps> = React.memo(({
simulationStatus = "idle",
compilationStatus = "ready",
backendReachable = true,
wsConnectionState = "disconnected",
wsHasEverConnected = false,
workerIndex,
workerTotal,
debugMode = false,
pendingExternalStart = false,
}) => {
// ── Compilation dot visual delay ───────────────────────────────────────
// Keep the blue dot visible for at least STATE_MIN_MS even on fast compiles.
const [visualCompStatus, setVisualCompStatus] = useState<CompilationStatus>(compilationStatus);
const httpTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
useEffect(() => {
if (compilationStatus === "compiling") {
Iif (httpTimerRef.current) clearTimeout(httpTimerRef.current);
setVisualCompStatus("compiling");
} else {
httpTimerRef.current = setTimeout(() => {
setVisualCompStatus(compilationStatus);
}, STATE_MIN_MS);
}
return () => {
if (httpTimerRef.current) {
clearTimeout(httpTimerRef.current);
httpTimerRef.current = null;
}
};
}, [compilationStatus]);
// ── Client state visual delay ──────────────────────────────────────────
// Show active states immediately; delay the downgrade back to IDLE so it
// stays readable for at least STATE_MIN_MS.
const clientState = deriveClientState(simulationStatus, compilationStatus, pendingExternalStart);
const [visualClientState, setVisualClientState] = useState<ClientState>(clientState);
const clientStateTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
useEffect(() => {
if (clientState === "IDLE") {
clientStateTimerRef.current = setTimeout(() => {
setVisualClientState(clientState);
}, STATE_MIN_MS);
} else {
Iif (clientStateTimerRef.current) clearTimeout(clientStateTimerRef.current);
setVisualClientState(clientState);
}
return () => {
if (clientStateTimerRef.current) {
clearTimeout(clientStateTimerRef.current);
clientStateTimerRef.current = null;
}
};
}, [clientState]);
const wsError = isWsError(wsConnectionState, wsHasEverConnected);
// ── Debug mode: 3-group status row ───────────────────────────────────
if (debugMode) {
// Compile slot: only visible while a compilation is in progress.
const compileSlotVal = visualCompStatus === "compiling"
&& !wsError
&& workerIndex !== undefined
&& workerTotal !== undefined
? `#${workerIndex + 1}/${workerTotal}`
: null;
// Simulation runner: only visible while simulation is active (running/paused/queued).
const simActive = simulationStatus === "running" || simulationStatus === "paused" || simulationStatus === "queued";
const simSlotVal = simActive
&& !wsError
&& workerIndex !== undefined
&& workerTotal !== undefined
? `#${workerIndex + 1}/${workerTotal}`
: null;
return (
<div
className="hidden lg:flex items-center gap-2 text-[10px] font-medium"
data-testid="sim-cockpit-debug"
>
{/* GROUP 1: CLIENT state */}
<StatCell
label="CLIENT"
value={<span data-testid="client-state-badge">{visualClientState}</span>}
valueClass={clientStateColor(visualClientState)}
/>
<ColSep />
{/* GROUP 2: COMPILATION — HTTP dot + slot (slot only while compiling) */}
<StatCell
label="COMPILATION"
value={(
<span className="flex items-center gap-1">
<span className="text-white/50">HTTP:</span>
<StatusDot
status={compilationStatusTone(visualCompStatus)}
label={compilationStatusLabel(visualCompStatus)}
pulse={visualCompStatus === "compiling"}
/>
{compileSlotVal && (
<>
<span className="text-white/30">|</span>
<span className="text-white/50">SLOT:</span>
<span className="text-white/50">{compileSlotVal}</span>
</>
)}
</span>
)}
/>
<ColSep />
{/* GROUP 3: SIMULATION — WS dot + mode + runner (mode/runner only while active) */}
<StatCell
label="SIMULATION"
value={(
<span className="flex items-center gap-1">
<span className="text-white/50">WS:</span>
<StatusDot
status={wsStatusTone(wsConnectionState, wsHasEverConnected)}
label={wsStatusLabel(wsConnectionState, wsHasEverConnected)}
pulse={wsConnectionState === "connecting" || wsConnectionState === "reconnecting"}
/>
{!wsError && simSlotVal && (
<>
<span className="text-white/30">|</span>
<span className="text-cyan-300 font-bold font-mono whitespace-nowrap">{simSlotVal}</span>
</>
)}
</span>
)}
/>
</div>
);
}
// ── Normal mode: icon-only server status ─────────────────────────────
return (
<ToolbarStatusIcon
className="hidden lg:flex"
icon={backendReachable
? <CircleCheck aria-hidden="true" />
: <CircleX aria-hidden="true" />}
label={backendReachable ? "Server connected" : "Server offline"}
status={backendReachable ? "success" : "error"}
/>
);
});
SimCockpit.displayName = "SimCockpit";
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