/**
 * `kundali()` — the sidereal birth chart: nine grahas, the lagna, and
 * whole-sign bhavas, with nakshatra and navamsa (D9) placements.
 *
 * The Date is the exact birth instant (a JS Date is always UTC inside);
 * no timezone is needed because nothing here depends on the local
 * calendar date — only on the instant and the place.
 */
import { type Nakshatra } from './nakshatra.js';
import { type Graha } from './names.js';
/** Which lunar node stands in for Rahu/Ketu. */
export type NodeKind = 'mean' | 'true';
export interface KundaliOptions {
    /** The exact birth instant. */
    date: Date;
    /** Degrees north-positive. */
    latitude: number;
    /** Degrees east-positive. */
    longitude: number;
    /**
     * Rahu/Ketu from the mean node (default, smooth regression) or the
     * true osculating node (wobbles ±1.7° around it, briefly direct).
     */
    node?: NodeKind;
}
export interface RashiPosition {
    /** Sidereal ecliptic longitude, degrees [0, 360). */
    longitude: number;
    /** Rashi index 0–11 (0 = Mesha). */
    rashi: number;
    rashiName: string;
    /** Degrees into the rashi, [0, 30). */
    degreeInRashi: number;
    nakshatra: Nakshatra;
    /** Navamsa (D9) rashi index 0–11. */
    navamsaRashi: number;
}
export interface GrahaPosition extends RashiPosition {
    graha: Graha;
    /**
     * Apparent backwards motion. Always true for the mean node's
     * Rahu/Ketu; the true node runs direct for short stretches.
     */
    retrograde: boolean;
    /** Whole-sign house 1–12, counted from the lagna's rashi. */
    bhava: number;
}
export interface Bhava {
    /** House number 1–12. */
    bhava: number;
    rashi: number;
    rashiName: string;
    /** Grahas occupying this house. */
    grahas: Graha[];
}
export interface Kundali {
    /** Lahiri ayanamsa at the instant, degrees. */
    ayanamsa: number;
    lagna: RashiPosition;
    /** All nine grahas in conventional order (Sun … Ketu). */
    grahas: GrahaPosition[];
    /** The twelve whole-sign houses, house 1 = the lagna's rashi. */
    bhavas: Bhava[];
}
export interface GrahaLongitude {
    graha: Graha;
    /** Sidereal (Lahiri) ecliptic longitude, degrees [0, 360). */
    longitude: number;
    retrograde: boolean;
}
/**
 * Sidereal longitudes and retrograde flags of all nine grahas at an
 * instant — the shared engine behind `kundali()` and `transits()`.
 *
 * @example
 * ```ts
 * grahaSiderealPositions(2449217.71875)[1];
 * // { graha: 'moon', longitude: ≈127.20, retrograde: false }
 * ```
 */
export declare function grahaSiderealPositions(jdUt: number, node?: NodeKind): GrahaLongitude[];
/**
 * Compute the sidereal kundali for a birth instant and place.
 *
 * @example
 * ```ts
 * const k = kundali({
 *   date: new Date('1993-08-18T05:15:00Z'), // 11:00 NPT
 *   latitude: 27.0104,
 *   longitude: 84.8821,
 * });
 * // k.lagna.rashiName          → 'Tula' (Libra 11°47′)
 * // k.grahas[1].nakshatra.name → 'Magha' (Moon), pada 3
 * // k.grahas[6].retrograde     → true   (Saturn)
 * ```
 */
export declare function kundali(options: KundaliOptions): Kundali;
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