/**
 * astroengine vedic -- the Vedic/Jyotish layer: nakshatras and the Vimshottari
 * dasha, built on the already-validated sidereal longitudes.
 *
 * A nakshatra is one of 27 equal lunar mansions of 13 deg 20' in the sidereal
 * zodiac, each with four padas and a ruling planet cycling Ketu, Venus, Sun,
 * Moon, Mars, Rahu, Jupiter, Saturn, Mercury. The Vimshottari dasha is a
 * 120-year sequence of planetary periods in that order; the starting dasha is
 * the lord of the Moon's birth nakshatra, with the elapsed portion set by how
 * far the Moon has moved through it. Mahadashas subdivide into antardashas and
 * pratyantardashas of the nine lords, proportional to their years. Nakshatra
 * placement is exact division of the sidereal longitude; the dasha year is a
 * fixed 365.25 days by default (the common Jyotish convention). Mirrors the
 * Python reference (astroengine/vedic.py); the golden fixtures pin the two.
 */
import { Engine, BodyId, Zodiac } from "./chart.js";
export declare const NAKSHATRAS: readonly ["Ashwini", "Bharani", "Krittika", "Rohini", "Mrigashira", "Ardra", "Punarvasu", "Pushya", "Ashlesha", "Magha", "Purva Phalguni", "Uttara Phalguni", "Hasta", "Chitra", "Swati", "Vishakha", "Anuradha", "Jyeshtha", "Mula", "Purva Ashadha", "Uttara Ashadha", "Shravana", "Dhanishta", "Shatabhisha", "Purva Bhadrapada", "Uttara Bhadrapada", "Revati"];
/** The Vimshottari order and each lord's period in years (totalling 120). */
export declare const VIMSHOTTARI_ORDER: readonly ["ketu", "venus", "sun", "moon", "mars", "rahu", "jupiter", "saturn", "mercury"];
export declare const VIMSHOTTARI_YEARS: Record<(typeof VIMSHOTTARI_ORDER)[number], number>;
export declare const NAK_SPAN: number;
export declare const DASHA_YEAR = 365.25;
export interface Nakshatra {
    index: number;
    name: string;
    pada: number;
    lord: string;
    /** Degrees into the nakshatra, 0..13.333. */
    pos: number;
}
/** The nakshatra of a sidereal longitude. */
export declare function nakshatra(siderealLon: number): Nakshatra;
/** The nakshatra of a body (default the Moon) at jd, in a sidereal zodiac. */
export declare function nakshatraAt(engine: Engine, jdUt: number, body?: BodyId, zodiac?: Zodiac): Nakshatra;
export interface DashaSub {
    lord: string;
    start: number;
    end: number;
}
export interface Dasha {
    level: number;
    lord: string;
    start: number;
    end: number;
    sub: DashaSub[];
}
export interface DashaTimeline {
    start_lord: string;
    balance_years: number;
    dashas: Dasha[];
}
/** The Vimshottari dasha timeline from the Moon's sidereal longitude. */
export declare function vimshottariDashas(moonLon: number, natalJd: number, levels?: number, yearLength?: number, count?: number): DashaTimeline;
export interface DashaActive {
    maha: string;
    antar: string | null;
    pratyantar: string | null;
}
/** The mahadasha, antardasha, and pratyantardasha lords active at targetJd. */
export declare function vimshottariActive(moonLon: number, natalJd: number, targetJd: number, yearLength?: number): DashaActive | null;
/** Vimshottari dasha active at targetJd, from the natal Moon's nakshatra. */
export declare function vimshottariAt(engine: Engine, natalJd: number, targetJd: number, zodiac?: Zodiac, yearLength?: number): {
    moon_nakshatra: string;
    moon_pada: number;
    start_lord: string;
} & Partial<DashaActive>;