import { DateTime } from 'luxon';
import type { Reminder, ReminderSchedule } from '../../shared/reminder.js';
export { systemTimezone } from '../schedule/local-time.js';
declare const WEEKDAYS: readonly ["sun", "mon", "tue", "wed", "thu", "fri", "sat"];
type Weekday = (typeof WEEKDAYS)[number];
export declare function parseDurationMs(value: string): number;
export declare function parseRepeatRule(rule: string, timezone: string): ReminderSchedule;
/**
 * Parse `--window mon-fri@08:00-18:30` (or explicit weekday lists).
 * v1 rejects overnight windows (end must be strictly after start on the same day).
 */
export declare function parseWindowRule(windowRule: string): {
    weekdays: Weekday[];
    windowEnd: string;
    windowStart: string;
};
export declare function buildWindowedIntervalSchedule(input: {
    repeatRule: string;
    timezone: string;
    windowRule: string;
}): Extract<ReminderSchedule, {
    kind: 'windowed_interval';
}>;
export declare function nextDueAtForSchedule(schedule: ReminderSchedule, after: Date, intervalFallbackAnchor?: string): string;
/**
 * Local wall-clock grid slots for one calendar day (inclusive).
 *
 * Contract: one wake per valid local grid *label* (HH:mm).
 * - Spring forward: skip nonexistent labels (e.g. 02:00–02:59 on US DST start).
 * - Fall back: do not emit duplicate labels for the repeated hour; resolve each
 *   label once (Luxon default = earlier offset).
 * Built by stepping labels from windowStart, not by UTC/`plus` continuum walks
 * that re-visit fallback labels.
 */
export declare function windowedSlotsOnLocalDay(schedule: Extract<ReminderSchedule, {
    kind: 'windowed_interval';
}>, day: DateTime): DateTime[];
export declare function initialDueAt(input: {
    delaySeconds?: number;
    fireAt?: string;
    now: Date;
    schedule: ReminderSchedule;
}): string;
export declare function reminderActivityPayload(tool: string, reminder: Reminder): Record<string, unknown>;
export declare function reminderActivityFields(reminder: Reminder): Record<string, unknown>;
/** Human-facing schedule fragment for list/activity (includes window when present). */
export declare function scheduleDisplayRule(schedule: ReminderSchedule): string | undefined;
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