import { DateRange, Disabled, InternalRange } from "./types";
/**
 * Gets the initial date from the selected date or range.
 * If the selected date is a Date, it returns the date.
 * If the selected date is an array, it returns the first element of the array.
 * If the selected date is an object, it returns the from property of the object.
 * @param selected
 * @returns
 */
export declare function getInitialDate(selected: Date | DateRange): Date;
/**
 * Gets the initial range from the selected date or range.
 * If the selected date is a Date, it returns an object with the same date for both from and to.
 * @param selected
 * @returns
 */
export declare function getInitialRange(selected: Date | DateRange): InternalRange;
/**
 * Checks if a given day is within a specified range, considering a focus date.
 *
 * @param day - The date to check if it falls within the range.
 * @param range - An object containing the start (`from`) and end (`to`) dates of the range.
 *                 Both `from` and `to` can be `null`.
 * @param focus - A date that serves as a reference point to determine the interval.
 *                It can be `null`.
 * @returns `true` if the day is within the range considering the focus date, otherwise `false`.
 *
 * The function works as follows:
 * - If `range.from` or `focus` is `null`, it returns `false`.
 * - If `focus` is after `range.from`, it checks if the day is within the interval from `range.from` to `focus`.
 * - If `focus` is before `range.from`, it checks if the day is within the interval from `focus` to `range.from`.
 * - If none of the above conditions are met, it returns `false`.
 */
export declare function isBetweenRange(day: Date, range: {
    from: Date | null;
    to: Date | null;
}, focus: Date | null): boolean;
/**
 * Parses a given date input and returns a Date object.
 *
 * @param date - The date input which can be either a Date object or a string representing a date.
 * @returns A Date object parsed from the input.
 *
 * @example
 * ```typescript
 * const date1 = parseDate("2023-10-05");
 * const date2 = parseDate(new Date());
 * ```
 */
export declare function parseDate(date: Date | string): Date;
/**
 * Determines if a given date should be disabled based on various constraints.
 *
 * @param current - The date to check for disabling.
 * @param disable - An object containing various disabling constraints.
 *   - `before` (Date | string): Disables dates before this date.
 *   - `after` (Date | string): Disables dates after this date.
 *   - `date` (Date | string): Disables a specific date.
 *   - `dates` (Array<Date | string>): Disables an array of specific dates.
 *   - `days` (Array<number | string>): Disables specific days of the week.
 *     Days can be specified as numbers (0 for Sunday, 1 for Monday, etc.) or
 *     as strings ("sunday", "monday", etc.).
 *   - `modifier` (function): A custom function that takes a date and returns
 *     a boolean indicating whether the date should be disabled.
 *
 * @returns `true` if the date should be disabled, `false` otherwise.
 */
export declare function getDisabled(current: Date, disable: Partial<Disabled> | undefined): boolean;