import { type SessionDisplayStatus } from "../../timeline-model.js";
import type { RailSession as Session } from "./session-list-entry.js";
export declare const DEFAULT_VISIBLE_TREE_LEVELS = 3;
export declare const MAX_VISUAL_TREE_DEPTH = 3;
export declare function sessionStatusLabel(status: SessionDisplayStatus): string;
import { sessionHasUpcomingSchedule, sessionInputWait } from "../../session-list-model.js";
export { sessionHasUpcomingSchedule, sessionInputWait };
export declare function sessionWaitLabel(deadlineAt: string, now?: number, compact?: boolean): string;
/** Honest user-facing state: lifecycle first, then the effective pause policy. */
export declare function sessionStateLabel(session: Session): string;
/** Root-to-parent path for the URL-active session, guarded against corrupt cycles. */
export declare function sessionAncestorPath(activeSessionId: string | null, parentOf: ReadonlyMap<string, string>): string[];
/** Expand only enough ancestors to show the default number of real tree levels. */
export declare function defaultExpandedAncestors(ancestorPath: readonly string[], manuallyCollapsed: ReadonlySet<string>, visibleLevels?: number): ReadonlySet<string>;
export declare function visualTreeDepth(depth: number): number;
/**
 * Whether a session is held by a pause for display. Cancel is implemented as a terminal
 * status plus a pause fence, so a cancelled session must read "Cancelled", never "Paused".
 */
export declare function sessionControlPaused(session: {
    status: string;
    effectiveControl?: {
        state: string;
    } | null | undefined;
}): boolean;