import type { UniqueIdentifier } from "@dnd-kit/abstract";
import type { DragEndEvent } from "@dnd-kit/react";
import type { DisplayStyle3dState } from "@itwin/core-frontend";
/**
 * Shared map-layer drag model utilities.
 *
 * This module defines stable droppable IDs, sortable item IDs, target parsing,
 * and the final drop commit into the viewport display style. It intentionally
 * contains no React state or optimistic hover behavior.
 */
export declare const overlayMapLayersId = "overlayMapLayers";
export declare const backgroundMapLayersId = "backgroundMapLayers";
export type MapLayerDroppableId = typeof overlayMapLayersId | typeof backgroundMapLayersId;
interface MapLayerDragStateItem {
    id: UniqueIdentifier;
    layerIndex: number;
}
type MapLayerDragState<TItem extends MapLayerDragStateItem> = Record<MapLayerDroppableId, TItem[]>;
interface MapLayerDropTarget {
    id: UniqueIdentifier;
    group?: UniqueIdentifier;
    index?: number;
}
type MapLayerDisplayStyle = Pick<DisplayStyle3dState, "attachMapLayer" | "detachMapLayerByIndex" | "mapLayerAtIndex" | "moveMapLayerToIndex">;
export declare function createMapLayerSortableId(droppableId: MapLayerDroppableId, layerName: string): string;
export declare function getMapLayerDroppableId(id: UniqueIdentifier | undefined): MapLayerDroppableId | undefined;
export declare function getMapLayerDropTargetId(target: MapLayerDropTarget | null | undefined): MapLayerDroppableId | undefined;
export declare function commitMapLayerDrop<TItem extends MapLayerDragStateItem>(displayStyle: MapLayerDisplayStyle, mapLayers: MapLayerDragState<TItem>, event: DragEndEvent): boolean;
export {};
//# sourceMappingURL=MapLayerDragModel.d.ts.map