import { Accessor } from "./ColumnDef";
import { AggregationConfig } from "./AggregationTypes";
import ColumnDef from "./ColumnDef";
import Row from "./Row";
export type PivotValueConfig = {
    accessor: Accessor;
    aggregation: AggregationConfig;
    label?: string;
};
export type PivotConfig = {
    /** Row dimension accessors (0+). Multi-level dims become an expandable tree. */
    rows: Accessor[];
    /** Column dimension accessors (0+). Distinct values become dynamic header groups. */
    columns: Accessor[];
    /** Value/measure configs (required, length >= 1). */
    values: PivotValueConfig[];
    /** Total column(s) aggregating across column dimensions. Default true. */
    showRowTotals?: boolean;
    /** Total row aggregating across row dimensions. Default true. */
    showColumnTotals?: boolean;
    /** Grand-total cell(s) on the totals row/column. Default true. */
    showGrandTotal?: boolean;
};
/** Synthetic child-array key used for multi-level pivot row trees. */
export declare const PIVOT_CHILDREN_KEY = "__pivotChildren";
/** Marker on total rows for styling / identification. */
export declare const PIVOT_IS_TOTAL_KEY = "__pivotIsTotal";
/** Prefix for generated pivot measure accessors. */
export declare const PIVOT_ACCESSOR_PREFIX = "__pivot:";
/** Label used when a dimension value is null/undefined. */
export declare const PIVOT_BLANK_LABEL = "(blank)";
export type PivotResult = {
    rows: Row[];
    headers: ColumnDef[];
    /** Internal rowGrouping to use while pivot is active (undefined when flat). */
    rowGrouping?: Accessor[];
};