import type { ColumnConfiguration } from 'apex-grid';
import type { GridFeatureModule, GridHost, RowTransformer } from 'apex-grid/internal';
import type { ReactiveController } from 'lit';
import { type AggregationConfig } from './aggregation.js';
export declare const PIVOT_MODULE_ID = "pivot";
/**
 * Enterprise feature: pivoting. Turns the distinct values of a column-dimension
 * field (`on`) into columns, groups rows by one or more row-dimension fields
 * (`rows`), and fills each cell with an aggregate (`values`) of the matching
 * leaves — a cross-tab pivot table.
 *
 * Implemented purely enterprise-side: it implements {@link RowTransformer} to
 * synthesize one pivot row per row-dimension combination (each carrying the
 * computed aggregates under generated synthetic column keys), and exposes
 * {@link computeColumns} so the grid can swap in the generated columns. The
 * existing cell renderer reads `data[column.key]` — which is the precomputed
 * aggregate — so no core change is needed. Aggregates reuse
 * {@link computeAggregations} over the (filtered) leaves.
 */
export declare class PivotController<T extends object> implements ReactiveController, RowTransformer<T> {
    #private;
    private host;
    /** Row-dimension fields (one leading column each). */
    rows: string[];
    /** Column-dimension field whose distinct values become columns. */
    on: string;
    /** Measures aggregated into each pivot cell, e.g. `{ amount: ['sum'] }`. */
    values: AggregationConfig;
    constructor(host: GridHost<T>);
    hostConnected(): void;
    /** Whether pivoting is fully configured and should transform the view. */
    get active(): boolean;
    /**
     * Build the pivot column set from `data`: one leading column per row-dimension
     * field, then one column per (distinct column-dimension value × measure × fn).
     * Stores the specs so {@link processRows} fills matching cells.
     */
    computeColumns(data: ReadonlyArray<T>): ColumnConfiguration<T>[];
    processRows(rows: ReadonlyArray<T>): T[];
}
/** Feature module registered on the enterprise grid. */
export declare const pivotModule: GridFeatureModule;