/**
 * DateService - Unified date/time service using day.js
 * Handles all date operations, timezone conversions, and formatting
 */
import { Configuration } from '../configurations/CalendarConfig';
export declare class DateService {
    private timezone;
    constructor(config: Configuration);
    /**
     * Convert local date to UTC ISO string
     * @param localDate - Date in local timezone
     * @returns ISO string in UTC (with 'Z' suffix)
     */
    toUTC(localDate: Date): string;
    /**
     * Convert UTC ISO string to local date
     * @param utcString - ISO string in UTC
     * @returns Date in local timezone
     */
    fromUTC(utcString: string): Date;
    /**
     * Format time as HH:mm or HH:mm:ss
     * @param date - Date to format
     * @param showSeconds - Include seconds in output
     * @returns Formatted time string
     */
    formatTime(date: Date, showSeconds?: boolean): string;
    /**
     * Format time range as "HH:mm - HH:mm"
     * @param start - Start date
     * @param end - End date
     * @returns Formatted time range
     */
    formatTimeRange(start: Date, end: Date): string;
    /**
     * Format date and time in technical format: yyyy-MM-dd HH:mm:ss
     * @param date - Date to format
     * @returns Technical datetime string
     */
    formatTechnicalDateTime(date: Date): string;
    /**
     * Format date as yyyy-MM-dd
     * @param date - Date to format
     * @returns ISO date string
     */
    formatDate(date: Date): string;
    /**
     * Format date as "Month Year" (e.g., "January 2025")
     * @param date - Date to format
     * @param locale - Locale for month name (default: 'en-US')
     * @returns Formatted month and year
     */
    formatMonthYear(date: Date, locale?: string): string;
    /**
     * Format date as ISO string (same as formatDate for compatibility)
     * @param date - Date to format
     * @returns ISO date string
     */
    formatISODate(date: Date): string;
    /**
     * Format time in 12-hour format with AM/PM
     * @param date - Date to format
     * @returns Time string in 12-hour format (e.g., "2:30 PM")
     */
    formatTime12(date: Date): string;
    /**
     * Get day name for a date
     * @param date - Date to get day name for
     * @param format - 'short' (e.g., 'Mon') or 'long' (e.g., 'Monday')
     * @param locale - Locale for day name (default: 'da-DK')
     * @returns Day name
     */
    getDayName(date: Date, format?: 'short' | 'long', locale?: string): string;
    /**
     * Format a date range with customizable options
     * @param start - Start date
     * @param end - End date
     * @param options - Formatting options
     * @returns Formatted date range string
     */
    formatDateRange(start: Date, end: Date, options?: {
        locale?: string;
        month?: 'numeric' | '2-digit' | 'long' | 'short' | 'narrow';
        day?: 'numeric' | '2-digit';
        year?: 'numeric' | '2-digit';
    }): string;
    /**
     * Convert time string (HH:mm or HH:mm:ss) to total minutes since midnight
     * @param timeString - Time in format HH:mm or HH:mm:ss
     * @returns Total minutes since midnight
     */
    timeToMinutes(timeString: string): number;
    /**
     * Convert total minutes since midnight to time string HH:mm
     * @param totalMinutes - Minutes since midnight
     * @returns Time string in format HH:mm
     */
    minutesToTime(totalMinutes: number): string;
    /**
     * Format time from total minutes (alias for minutesToTime)
     * @param totalMinutes - Minutes since midnight
     * @returns Time string in format HH:mm
     */
    formatTimeFromMinutes(totalMinutes: number): string;
    /**
     * Get minutes since midnight for a given date
     * @param date - Date to calculate from
     * @returns Minutes since midnight
     */
    getMinutesSinceMidnight(date: Date): number;
    /**
     * Calculate duration in minutes between two dates
     * @param start - Start date or ISO string
     * @param end - End date or ISO string
     * @returns Duration in minutes
     */
    getDurationMinutes(start: Date | string, end: Date | string): number;
    /**
     * Get start and end of week (Monday to Sunday)
     * @param date - Reference date
     * @returns Object with start and end dates
     */
    getWeekBounds(date: Date): {
        start: Date;
        end: Date;
    };
    /**
     * Add weeks to a date
     * @param date - Base date
     * @param weeks - Number of weeks to add (can be negative)
     * @returns New date
     */
    addWeeks(date: Date, weeks: number): Date;
    /**
     * Add months to a date
     * @param date - Base date
     * @param months - Number of months to add (can be negative)
     * @returns New date
     */
    addMonths(date: Date, months: number): Date;
    /**
     * Get ISO week number (1-53)
     * @param date - Date to get week number for
     * @returns ISO week number
     */
    getWeekNumber(date: Date): number;
    /**
     * Get all dates in a full week (7 days starting from given date)
     * @param weekStart - Start date of the week
     * @returns Array of 7 dates
     */
    getFullWeekDates(weekStart: Date): Date[];
    /**
     * Get dates for work week using ISO 8601 day numbering (Monday=1, Sunday=7)
     * @param weekStart - Any date in the week
     * @param workDays - Array of ISO day numbers (1=Monday, 7=Sunday)
     * @returns Array of dates for the specified work days
     */
    getWorkWeekDates(weekStart: Date, workDays: number[]): Date[];
    /**
     * Create a date at a specific time (minutes since midnight)
     * @param baseDate - Base date (date component)
     * @param totalMinutes - Minutes since midnight
     * @returns New date with specified time
     */
    createDateAtTime(baseDate: Date, totalMinutes: number): Date;
    /**
     * Snap date to nearest interval
     * @param date - Date to snap
     * @param intervalMinutes - Snap interval in minutes
     * @returns Snapped date
     */
    snapToInterval(date: Date, intervalMinutes: number): Date;
    /**
     * Check if two dates are the same day
     * @param date1 - First date
     * @param date2 - Second date
     * @returns True if same day
     */
    isSameDay(date1: Date, date2: Date): boolean;
    /**
     * Get start of day
     * @param date - Date
     * @returns Start of day (00:00:00)
     */
    startOfDay(date: Date): Date;
    /**
     * Get end of day
     * @param date - Date
     * @returns End of day (23:59:59.999)
     */
    endOfDay(date: Date): Date;
    /**
     * Add days to a date
     * @param date - Base date
     * @param days - Number of days to add (can be negative)
     * @returns New date
     */
    addDays(date: Date, days: number): Date;
    /**
     * Add minutes to a date
     * @param date - Base date
     * @param minutes - Number of minutes to add (can be negative)
     * @returns New date
     */
    addMinutes(date: Date, minutes: number): Date;
    /**
     * Parse ISO string to date
     * @param isoString - ISO date string
     * @returns Parsed date
     */
    parseISO(isoString: string): Date;
    /**
     * Check if date is valid
     * @param date - Date to check
     * @returns True if valid
     */
    isValid(date: Date): boolean;
    /**
     * Calculate difference in calendar days between two dates
     * @param date1 - First date
     * @param date2 - Second date
     * @returns Number of calendar days between dates (can be negative)
     */
    differenceInCalendarDays(date1: Date, date2: Date): number;
    /**
     * Validate date range (start must be before or equal to end)
     * @param start - Start date
     * @param end - End date
     * @returns True if valid range
     */
    isValidRange(start: Date, end: Date): boolean;
    /**
     * Check if date is within reasonable bounds (1900-2100)
     * @param date - Date to check
     * @returns True if within bounds
     */
    isWithinBounds(date: Date): boolean;
    /**
     * Validate date with comprehensive checks
     * @param date - Date to validate
     * @param options - Validation options
     * @returns Validation result with error message
     */
    validateDate(date: Date, options?: {
        requireFuture?: boolean;
        requirePast?: boolean;
        minDate?: Date;
        maxDate?: Date;
    }): {
        valid: boolean;
        error?: string;
    };
}