import type { ColumnFiltersState, FilterFn } from '@tanstack/react-table';
import type { ColumnFilterConfig, ColumnFilterOption, FilterCondition, FilterField, TableFiltersState } from '../../types/datatable';
/** Normalize string[] | {label,value}[] options to a consistent shape. */
export declare function normalizeFilterOptions(options?: ColumnFilterOption[] | string[]): ColumnFilterOption[];
/** Group FilterField[] by `field` (preserves order of first occurrence). */
export declare function groupFiltersByField(filters: TableFiltersState): Map<string, FilterField[]>;
export declare function filtersToColumnFilters(filters: TableFiltersState): ColumnFiltersState;
/**
 * Convert TanStack column-filter values back to FilterField[].
 * Supports FilterField[] (header filters) and string[] (legacy toolbar).
 */
export declare function columnFiltersToFilterFields(columnFilters: ColumnFiltersState): TableFiltersState;
/**
 * Read selected option values from a column filter value, whether it is
 * legacy `string[]` or current `FilterField[]`.
 */
export declare function getSelectedFilterValues(filterValue: unknown): Set<string>;
export declare function applyCondition(cellValue: unknown, condition: FilterCondition | string, filterValue: string): boolean;
/**
 * Client-side column filter. Accepts FilterField[] (current) or string[]
 * (legacy toolbar values) so older call sites keep working.
 */
export declare const columnFilterFn: FilterFn<unknown>;
export declare function findFilterConfig(configs: ColumnFilterConfig[] | undefined, columnId: string): ColumnFilterConfig | undefined;