import type { MindMapData } from '../types';
export declare function generateId(): string;
export declare function normalizeData(data: MindMapData | MindMapData[]): MindMapData[];
export declare function updateNodeText(node: MindMapData, id: string, text: string): MindMapData;
export declare function updateNodeFields(node: MindMapData, id: string, fields: Partial<Pick<MindMapData, 'text' | 'taskStatus' | 'remark' | 'collapsed'>>): MindMapData;
export declare function addChild(node: MindMapData, parentId: string, child: MindMapData): MindMapData;
export declare function removeNode(node: MindMapData, targetId: string): MindMapData;
export declare function addSibling(node: MindMapData, targetId: string, sibling: MindMapData): MindMapData;
export declare function swapSiblings(node: MindMapData, id1: string, id2: string): MindMapData;
export declare function findSubtree(node: MindMapData, targetId: string): MindMapData | null;
export declare function regenerateIds(node: MindMapData): MindMapData;
export declare function getDescendantIds(nodeId: string, nodes: {
    id: string;
    parentId?: string;
}[]): string[];
export declare function updateNodeTextMulti(roots: MindMapData[], id: string, text: string): MindMapData[];
export declare function updateNodeFieldsMulti(roots: MindMapData[], id: string, fields: Partial<Pick<MindMapData, 'text' | 'taskStatus' | 'remark' | 'collapsed'>>): MindMapData[];
export declare function addChildMulti(roots: MindMapData[], parentId: string, child: MindMapData): MindMapData[];
export declare function addSiblingMulti(roots: MindMapData[], targetId: string, sibling: MindMapData): MindMapData[];
export declare function removeNodeMulti(roots: MindMapData[], targetId: string): MindMapData[];
export declare function swapSiblingsMulti(roots: MindMapData[], id1: string, id2: string): MindMapData[];
export declare function findSubtreeMulti(roots: MindMapData[], targetId: string): MindMapData | null;
/**
 * Add a child to a specific side of a root node's children.
 * Returns the updated root and the new splitIndex.
 */
export declare function addChildToSide(root: MindMapData, child: MindMapData, side: 'left' | 'right', splitIndex: number): {
    data: MindMapData;
    newSplitIndex: number;
};
/**
 * Move a direct child of root from one side to the other.
 * Returns the updated root and new splitIndex, or null if already on target side.
 */
export declare function moveChildToSide(root: MindMapData, childId: string, toSide: 'left' | 'right', splitIndex: number): {
    data: MindMapData;
    newSplitIndex: number;
} | null;