import { components } from '../../types/api';
import { DashboardDataResponse } from '../../types/Metrics';
/**
 * Returns whether the keys array contains optional ones
 *
 * @param {components['schemas']['DashboardVisualisationColumnDefinition'][]} keys
 * @return {*}  {boolean}
 */
export declare const hasOptionalKeys: (keys: components["schemas"]["DashboardVisualisationColumnDefinition"][]) => boolean;
/**
 * Filters dashboard data rows based on the most complete valid set of column IDs.
 *
 * Workflow:
 * 1. Generate all fallback key combinations using getKeyVariations().
 * 2. Use getKeyIds() to determine the "best" set of required keys — meaning:
 *    the largest set of IDs for which *at least one* row has valid data
 *    (non-empty, non-null, non-undefined).
 * 3. Filter the entire dataset to keep only rows that have valid values
 *    for all selected required keys.
 *
 * @param {DashboardDataResponse[]} dashboardData The full dataset to filter.
 * @param {components['schemas']['DashboardVisualisationColumnDefinition'][]} keys Column definitions used to derive key combinations.
 * @returns {DashboardDataResponse[]} Rows that satisfy the selected required-key validity rules.
 */
export declare const filterRowsByKeys: (dashboardData: DashboardDataResponse[], keys: components["schemas"]["DashboardVisualisationColumnDefinition"][]) => DashboardDataResponse[];
/**
 * Generate all valid column ID variations based on trailing optional keys.
 *
 * Behaviour rules:
 * 1. Begin with the full list of column IDs.
 * 2. Iterate backward through the keys:
 *    - Add the current remaining IDs as a variation.
 *    - If the current key is optional, remove its ID from the end.
 *    - If the current key is NOT optional, stop removing afterward.
 * 3. If *all* keys are optional, append an empty list.
 *
 * @param {components['schemas']['DashboardVisualisationColumnDefinition'][]} keys The visualisation column definitions.
 * @returns {string[][]} An array of ID combinations representing valid fallback sets.
 */
export declare const getKeyVariations: (keys: components["schemas"]["DashboardVisualisationColumnDefinition"][]) => string[][];
/**
 * Given dashboard data and a list of column-ID variations (from getKeyVariations),
 * this function returns the *first* ID set for which there exists at least one
 * row where all referenced fields contain valid (non-empty, non-null) raw values.
 *
 * If *none* of the variations produce any valid rows, the function returns the
 * *last* variation tested.
 *
 * @param {DashboardDataResponse[]} dashboardData Array of dataset rows to validate.
 * @param {string[][]} colIdVariations Variations of column IDs, ordered from most strict → least strict.
 * @returns {string[]} The first ID set that has at least one fully-valid row, or the last set.
 */
export declare const getKeyIds: (dashboardData: DashboardDataResponse[], colIdVariations: string[][]) => string[];