import { Waypoint } from './waypoint.js';
/**
 * Enum representing different sun events.
 *
 * @enum {string}
 * @readonly
 */
export declare enum SunEventType {
    Sunrise = "sunrise",
    Sunset = "sunset",
    Dawn = "dawn",// Morning civil twilight starts
    Dusk = "dusk",// Evening civil twilight starts
    NauticalDawn = "nauticalDawn",
    NauticalDusk = "nauticalDusk",
    NightEnd = "nightEnd",// Dark enough for astronomical observations
    Night = "night",// Dark enough for astronomical observations
    GoldenHourEnd = "goldenHourEnd",
    GoldenHour = "goldenHour",
    SolarNoon = "solarNoon",
    NaDir = "nadir"
}
/**
 * Interface representing a sun event.
 *
 * @interface SunEvent
 * @property {Date} time - The time when the event occurs
 * @property {SunEventType} event - The type of sun event
 * @property {Waypoint} location - The location where the event occurs
 */
export interface SunEvent {
    time: Date;
    event: SunEventType;
    location: Waypoint;
}
/**
 * Calculates sun events for a given waypoint and date.
 *
 * @param waypoint - The waypoint for which to calculate sun events
 * @param date - The date for which to calculate sun events
 * @returns An object containing sun event times
 */
export declare function calculateSunEvents(waypoint: Waypoint, date?: Date): Record<SunEventType, SunEvent>;
/**
 * Determines if a given time is during daylight at the specified waypoint.
 *
 * @param waypoint - The waypoint to check for daylight
 * @param time - The time to check (defaults to current time)
 * @returns true if the specified time is during daylight (between sunrise and sunset)
 */
export declare function isDaylight(waypoint: Waypoint, time?: Date): boolean;
/**
 * Determines if a given time is during night at the specified waypoint.
 * Night is defined as the period between the end of evening civil twilight and the beginning of morning civil twilight.
 *
 * @param waypoint - The waypoint to check for night conditions
 * @param time - The time to check (defaults to current time)
 * @returns true if the specified time is during night
 */
export declare function isNight(waypoint: Waypoint, time?: Date): boolean;
/**
 * Calculates sun and moon positions for a given waypoint and time.
 *
 * @param waypoint - The waypoint for which to calculate positions
 * @param time - The time for which to calculate positions
 * @returns An object containing sun and moon position data
 */
export declare function getSunAndMoonPositions(waypoint: Waypoint, time?: Date): {
    sun: {
        azimuth: number;
        altitude: number;
    };
    moon: {
        azimuth: number;
        altitude: number;
        illumination: number;
        phase: number;
    };
};
/**
 * Determines if a flight between two waypoints involves night flying.
 *
 * @param from - The departure waypoint
 * @param to - The destination waypoint
 * @param departureTime - The departure time
 * @param speed - The ground speed in knots
 * @returns true if any portion of the flight occurs during night time
 */
export declare function flightInvolvesNight(from: Waypoint, to: Waypoint, departureTime: Date, speed: number): boolean;
/**
 * Extends a RouteTrip with sun events at departure and destination.
 *
 * @param trip - The route trip to extend
 * @param date - The date for the sun events calculation
 * @returns The extended route trip with sun events
 */