import { RelationSpecification, Specification } from '../model-parsing/models/specification.models';
import { DataModel } from '../model/models/data-model.models';
import { TagModel } from '../model/models/tag.models';
import { ViewModel } from '../model/models/view-model.models';
import { Config } from './models/config.models';
import { ViewRequirements } from './models/view-requirements.models';
/**
 * Default colors for drilldown items when no specific coloring is available.
 * Used when drilldown coloring is enabled but no data exists for a specific drilldown item.
 */
export declare const DEFAULT_DRILLDOWN_COLORS: DrilldownColors;
/**
 * Drilldown option containing the relation specification for drilldown navigation and additional legend coloring flag.
 * All properties are optional to allow flexible usage by end users.
 */
interface DrilldownOption {
    specification?: RelationSpecification;
    isLegendColoring?: boolean;
}
/**
 * Color information for drilldown items including text, background, and border colors.
 *
 * @property id - The legend item ID (-1 indicates "no data" / default colors)
 * @property color - Text color for the drilldown item
 * @property backgroundColor - Background color for the drilldown cell
 * @property borderColor - Border/circle color for the drilldown indicator
 */
interface DrilldownColors {
    id: number;
    color: string;
    backgroundColor: string;
    borderColor: string;
}
/**
 * Determines if the legend is ready for a drilldown operation.
 * This function checks various conditions to ensure that the base and target FactSheets
 * are compatible and have matching metadata for rendering the legend.
 *
 * All input parameters support partial/optional properties for flexibility.
 * Missing or invalid data returns false (safe default behavior).
 *
 * @param activeView - The currently active view specification, or null if none.
 * @param baseFactSheet - The type of the base FactSheet.
 * @param drilldownOption - The drilldown option containing the target specification.
 * @param dataModel - The data model containing FactSheet definitions.
 * @param viewModel - The view model containing FactSheet metadata.
 * @param tagModel - The tag model containing FactSheet tags data.
 * @returns True if the legend is ready for the drilldown, otherwise false.
 */
export declare function isLegendReadyDrilldown(activeView: Specification | null, baseFactSheet: string | undefined, drilldownOption: DrilldownOption | null, dataModel: DataModel | null, viewModel: ViewModel | null, tagModel: TagModel | undefined): boolean;
/**
 * Computes colors for a drilldown item based on its view value.
 * This function applies the view configuration to determine the appropriate colors
 * for displaying the drilldown item in the report.
 *
 * Note: This function is not memoized. If memoization is needed, consumers should wrap this
 * function with their own memoization strategy (e.g., using memoize-one, useMemo, etc.).
 *
 * @param viewField - The view field name to compute colors for
 * @param viewValue - The view field value to compute colors for
 * @param config - Configuration object containing view settings
 * @param viewRequirements - View requirements including legend and aggregation settings
 * @returns DrilldownColors object with computed colors, or DEFAULT_DRILLDOWN_COLORS if computation fails
 */
export declare function computeDrilldownColors(viewField: string, viewValue: string | number | Record<string, unknown>, config: Config, viewRequirements: ViewRequirements): DrilldownColors;
/**
 * Determines if additional fields are needed for drilldown legend coloring.
 * Additional fields are required when legend coloring is enabled.
 *
 * @param view - The currently active view specification, or null if none
 * @param drilldown - The active drilldown option containing legend coloring settings, or null if none
 * @returns True if additional fields are needed for drilldown, otherwise false
 */
export declare function isAdditionalFieldsForDrilldownNeeded(view: Specification | null, drilldown: DrilldownOption | null): boolean;
export {};