import { ArraySchema, Schema } from "@colyseus/schema";
import type { ChildTrait } from "./child.js";
import { ParentTrait } from "./parent.js";
declare class SelectedChildData extends Schema {
    childIndex: number;
    selectionIndex: number;
    constructor(childIndex: number, selectionIndex: number);
    toString(): string;
}
/**
 *
 * @param entity
 * @returns
 * @category SelectableChildren
 */
export declare function hasSelectableChildren(entity: unknown): entity is SelectableChildrenTrait;
/**
 * Used on **container** - its children can now be selected by players.
 *
 * Holds indexes of selected children and in which order were these chosen.
 *
 * > TODO: This trait is clearly dependant on ParentTrait. There should be a way of checking/ensuring this dependency is met
 * @category SelectableChildren
 */
export declare class SelectableChildrenTrait {
    selectedChildren: ArraySchema<SelectedChildData>;
    /**
     * Select child
     */
    selectChildAt(this: ParentTrait & SelectableChildrenTrait, childIndex: number): void;
    /**
     * Deselect child
     */
    deselectChildAt(this: ParentTrait & SelectableChildrenTrait, childIndex: number): void;
    isChildSelected(childIndex: number): boolean;
    /**
     * In which order was nth child selected. Returns `undefined` on index of UNselected child.
     * @param childIndex index of child
     */
    getSelectionIndex(childIndex: number): number;
    /**
     * Number of selected child elements
     */
    countSelectedChildren(): number;
    /**
     * Number of not selected child elements
     */
    countUnselectedChildren(this: ParentTrait & SelectableChildrenTrait): number;
    getSelectedChildren<T extends ChildTrait>(this: ParentTrait & SelectableChildrenTrait): T[];
    getUnselectedChildren<T extends ChildTrait>(this: ParentTrait & SelectableChildrenTrait): T[];
    _selectableEnsureIndex(this: ParentTrait & SelectableChildrenTrait, index: number): void;
}
export {};