/**
 * Undo/Redo system for Bench3D
 * Core undo functionality without UI dependencies
 */
export interface UndoAspects {
    elements?: any[];
    groups?: any[];
    textures?: any[];
    animations?: any[];
    selection?: boolean | object;
    [key: string]: any;
}
export interface UndoEntry {
    before: UndoSave;
    post: UndoSave;
    action: string;
    type: 'edit' | 'selection';
    time: number;
    selection_before?: UndoSelectionSave;
    selection_post?: UndoSelectionSave;
}
export interface UndoSave {
    aspects: UndoAspects;
    data: Record<string, any>;
}
export interface UndoSelectionSave {
    aspects: UndoAspects;
    data: Record<string, any>;
}
/**
 * Core undo system for tracking changes
 */
export declare class UndoSystem {
    private history;
    private index;
    private currentSave;
    private currentSelectionSave;
    private maxHistorySize;
    constructor(maxHistorySize?: number);
    /**
     * Initialize an edit operation
     */
    initEdit(aspects: UndoAspects, amended?: boolean): UndoSave;
    /**
     * Finish an edit operation and add to history
     */
    finishEdit(message: string, aspects?: UndoAspects): UndoEntry | null;
    /**
     * Initialize a selection change
     */
    initSelection(aspects: UndoAspects): UndoSelectionSave | null;
    /**
     * Finish a selection change
     */
    finishSelection(message: string, aspects?: UndoAspects): UndoEntry | null;
    /**
     * Cancel current edit
     */
    cancelEdit(revertChanges?: boolean): void;
    /**
     * Cancel current selection change
     */
    cancelSelection(revertChanges?: boolean): void;
    /**
     * Undo last operation
     */
    undo(): boolean;
    /**
     * Redo last undone operation
     */
    redo(): boolean;
    /**
     * Check if undo is available
     */
    canUndo(): boolean;
    /**
     * Check if redo is available
     */
    canRedo(): boolean;
    /**
     * Clear undo history
     */
    clear(): void;
    /**
     * Get undo history
     */
    getHistory(): readonly UndoEntry[];
    /**
     * Get current history index
     */
    getIndex(): number;
    /**
     * Create a save point from aspects
     */
    private createSave;
    /**
     * Create a selection save point
     */
    private createSelectionSave;
    /**
     * Load a save point (restore state)
     */
    private loadSave;
}
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