import { CellData, HeaderRowGroup } from '../types/internal-interface';
import { HeaderRowConfig, HeaderRowOption, TimeScaleProps } from '../types/scheduler-types';
import { WeekRule } from '../types/enums';
/** @private */
export declare class HeaderService {
    /**
     * Resolves whether timeline body/header column units are hour-slots or dates.
     * Mirrors last-level grain of SchedulerHeaderRowsProvider without coupling
     * to that context (avoids circular dependency with isMonthView).
     *
     * @param {HeaderRowConfig[] | undefined} headerRows - Custom header rows.
     * @param {string} [view] - Active view type string.
     * @param {boolean} [isTimeScaleEnabled] - Indicates timescale enable or disable.
     * @returns {boolean} True when column count uses time-scale minor slots.
     */
    static isTimeHeaderVisible(headerRows: HeaderRowConfig[] | undefined, view?: string, isTimeScaleEnabled?: boolean): boolean;
    /**
     * Computes the display label for a single date in the header last row.
     *
     * @param {Date} date - The date to label.
     * @param {string} view - Active timeline view type.
     * @param {string} locale - Locale string for formatting.
     * @returns {string} Formatted label.
     */
    static computeHeaderCellLabel(date: Date, view: string, locale: string): string;
    /**
     * Builds the lightweight per-date rows consumed by the timeline header
     * (date + isWeekend + display label) from a render-date range.
     *
     * Falls back to `[selectedDate]` (or `new Date()`) when `renderDates` is empty,
     * matching the `useHeaderRows` fallback contract.
     *
     * @param {Date[]} renderDates - Active render dates.
     * @param {Date} selectedDate - Selected date fallback when no render dates exist.
     * @param {string} view - Active timeline view type.
     * @param {string} locale - Locale string for formatting.
     * @param {number[]} workDays - Holds workDays numbers.
     * @param {string} [timezone] - timezone used to determine the current date.
     * @returns {Object} Per-date header rows.
     */
    static buildDateRows(renderDates: Date[], selectedDate: Date | undefined, view: string, locale: string, workDays: number[], timezone?: string): {
        date: Date;
        isWeekend: boolean;
        isToday: boolean;
        label: string;
    }[];
    /**
     * Weekend / base class metadata for a date-header CellData entry.
     *
     * @param {Date} date - Calendar date of the cell.
     * @param {number[]} workDays - Holds workDays numbers.
     * @returns {Object} Class metadata.
     */
    static getDateHeaderClassMeta(date: Date, workDays: number[]): {
        className: string[];
        cssClass: string | undefined;
    };
    /**
     * Resolves last header-row option and builds true last-level `CellData[]`.
     *
     * Defaults (no custom `headerRows`): TimelineMonth / month layout → Date;
     * otherwise Hour (finest work axis). Custom last option follows that option's
     * grain (Hour expands slots; Date per day; Year/Month/Week from groups).
     *
     * @param {Date[]} renderDates - Active render dates.
     * @param {HeaderRowConfig[]} headerRows - User header row configs.
     * @param {string} view - Active view type.
     * @param {string} locale - Locale string.
     * @param {string} startHour - Day start.
     * @param {string} endHour - Day end.
     * @param {TimeScaleProps | undefined} timeScale - Time scale props.
     * @param {Object} allHeaderGroups - Holds the custom group values.
     * @param {number[]} workDays - Holds workDays numbers.
     * @returns {CellData[]} Last-level track cells.
     */
    static buildHeaderLastLevelCells(renderDates: Date[], headerRows: HeaderRowConfig[], view: string, locale: string, startHour: string, endHour: string, timeScale: TimeScaleProps | undefined, allHeaderGroups?: {
        Year?: HeaderRowGroup[];
        Month?: HeaderRowGroup[];
        Week?: HeaderRowGroup[];
    }, workDays?: number[]): CellData[];
    /**
     * One `dateHeader` CellData per render date (Date-row / TimelineMonth last track).
     *
     * @param {Date[]} renderDates - Active render dates.
     * @param {string} view - Active timeline view type.
     * @param {string} locale - Locale for labels.
     * @param {number[]} workDays - Holds workDays numbers.
     * @returns {CellData[]} Date-grained last-level cells.
     */
    private static buildDateLevelCells;
    /**
     * Finest hour/slot last track: one cell per date × `getSlotMetadata` minor slot.
     *
     * @param {Date[]} renderDates - Active render dates.
     * @param {string} startHour - Day start (HH:mm).
     * @param {string} endHour - Day end (HH:mm).
     * @param {TimeScaleProps | undefined} timeScale - Active time scale (interval / slotCount).
     * @param {number[]} workDays - Holds workDays numbers.
     * @returns {CellData[]} Slot-expanded last-level cells.
     */
    private static buildHourLevelCells;
    /**
     * Year / Month / Week last-row groups as col-spanned `dateHeader` cells.
     *
     * @param {HeaderRowGroup[]} groups - Precomputed groups for the last option.
     * @param {number[]} workDays - Holds workDays numbers.
     * @returns {CellData[]} Group-grained last-level cells.
     */
    private static buildGroupLevelCells;
    /**
     * Builds the Year/Month/Week group map for the active header-row options.
     * Only options present in `headerRows` are populated; absent options are omitted.
     *
     * @param {HeaderRowConfig[]} headerRows - User header row configs.
     * @param {Date[]} renderDates - Active render dates.
     * @param {string} locale - Locale string.
     * @param {WeekRule} weekRule - Week numbering rule.
     * @param {number} firstDayOfWeek - First day of the week (0-6).
     * @returns {Object} Map keyed by option name.
     */
    static buildAllHeaderGroups(headerRows: HeaderRowConfig[], renderDates: Date[], locale: string, weekRule: WeekRule, firstDayOfWeek: number): {
        Year?: HeaderRowGroup[];
        Month?: HeaderRowGroup[];
        Week?: HeaderRowGroup[];
    };
    static generateHeaderRowGroups(renderDates: Date[], option: HeaderRowOption, locale?: string, weekRule?: WeekRule, firstDayOfWeek?: number): HeaderRowGroup[];
}
export default HeaderService;