/**
 * useVersionHistory Hook
 * TASKSET 9 Phase 8: Real-time version history updates via MessageRouter
 *
 * Provides:
 * - Real-time version snapshot creation
 * - Version restoration notifications
 * - Version comparison events
 * - Version history access tracking
 */
export interface Version {
    id: string;
    documentId: string;
    versionNumber: number;
    createdBy: string;
    snapshotSize: number;
    createdAt: Date;
    restoredBy?: string;
    restoredAt?: Date;
    newVersionNumber?: number;
}
export interface VersionComparison {
    documentId: string;
    versionFrom: number;
    versionTo: number;
    userId: string;
    diffSize: number;
    comparedAt: Date;
    diff: string;
    addedLines: number;
    removedLines: number;
    changedLines: number;
    fromTimestamp: Date;
    toTimestamp: Date;
}
export interface UseVersionHistoryOptions {
    documentId: string;
    wsUrl?: string;
    /**
     * Use shared relay connection from RelayProvider context.
     * When true, the hook will not create its own WebSocket connection
     * and will instead use the shared connection from useRelay().
     * @default false
     */
    useSharedConnection?: boolean;
    onVersionCreated?: (version: Version) => void;
    onVersionRestored?: (version: Version) => void;
    onVersionCompared?: (comparison: VersionComparison) => void;
    onError?: (error: Error) => void;
}
export interface UseVersionHistoryReturn {
    versions: Version[];
    currentVersion: Version | null;
    comparison: VersionComparison | null;
    comparisons: VersionComparison[];
    isConnected: boolean;
    error: Error | null;
    createSnapshot: (snapshotSize: number) => Promise<void>;
    restoreVersion: (versionNumber: number) => Promise<void>;
    compareVersions: (versionFrom: number, versionTo: number) => Promise<void>;
    clearComparison: () => void;
}
/**
 * Real-time version history management hook
 */
export declare const useVersionHistory: (options: UseVersionHistoryOptions) => UseVersionHistoryReturn;
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