import { YearMeta } from "./types";
/**
 * Month lengths are a PREFIX, not necessarily twelve entries. Months publish one at a
 * time and the twelfth needs the FOLLOWING year's Baisakh 1, so a year in progress
 * legitimately holds only its first few. Check `isSupportedMonth`, not just the year.
 */
export declare let monthLengths: Record<number, number[]>;
export declare let yearStart: Record<number, string>;
/** Provenance per year; absent for data seeded before month-meta.json existed. */
export declare let yearMeta: Record<number, YearMeta>;
/** Must be awaited once (or awaited by the first library call) before conversions. */
export declare function loadCalendarData(): Promise<void>;
export declare function supportedYears(): number[];
export declare function isSupportedYear(year: number): boolean;
/** Leading months known for a year; 0 when absent, 12 when closed. */
export declare function knownMonths(year: number): number;
/** Is this specific month resolvable? A partial year answers yes only up to its prefix. */
export declare function isSupportedMonth(year: number, month: number): boolean;
/** Years complete enough to convert any date within them. */
export declare function completeYears(): number[];
/**
 * True when a year rests on an unverified prediction or is still incomplete.
 *
 * Nepal Patro publishes predictions ahead of the official gazette, and a revision can move
 * a date. Anything that has to be right — a tax filing, say — should refuse provisional
 * data; anything that merely displays a period is fine with it.
 */
export declare function isProvisional(year: number): boolean;
/** Full provenance for a year, or undefined when nothing is stored. */
export declare function getYearInfo(year: number): YearMeta | undefined;