/**
 * Reactive dependency graph for FeltDB collections
 *
 * Tracks relationships between collections (base → derived → further derived)
 * and propagates mutations automatically without polling.
 */
/**
 * Represents a change in the collection
 */
export interface CollectionChange<T> {
    type: 'insert' | 'update' | 'delete';
    key: string;
    value: T | null;
    timestamp: number;
}
/**
 * Tracks dependencies between collections and propagates changes
 */
export declare class ReactiveDependencyGraph {
    /** Map of collection name to its dependents (derived collections) */
    private dependencies;
    /** Map of collection name to its subscribers (callbacks) */
    private subscribers;
    /** Recent changes for each collection (for differential updates) */
    private recentChanges;
    /**
     * Register a dependency: when sourceCollection changes, notify dependentCollection
     */
    registerDependency(sourceCollection: string, dependentCollection: string): void;
    /**
     * Subscribe to changes for a collection
     */
    subscribe(collectionName: string, callback: (change: CollectionChange<any>) => void | Promise<void>): () => void;
    /**
     * Emit a change for a collection, triggering all subscribers
     */
    emitChange<T>(collectionName: string, change: CollectionChange<T>): Promise<void>;
    /**
     * Get recent changes for a collection (for differential updates)
     */
    getRecentChanges<T>(collectionName: string): CollectionChange<T>[];
    /**
     * Clear recent changes for a collection
     */
    clearRecentChanges(collectionName: string): void;
    /**
     * Get the number of active subscribers for a collection
     */
    getSubscriberCount(collectionName: string): number;
    /**
     * Check if a collection has any dependents
     */
    hasDependents(collectionName: string): boolean;
    /**
     * Get all dependents of a collection
     */
    getDependents(collectionName: string): string[];
}
/**
 * Get the global reactive dependency graph
 */
export declare function getReactiveDependencyGraph(): ReactiveDependencyGraph;
/**
 * Reset the global graph (useful for testing)
 */
export declare function resetReactiveDependencyGraph(): void;
//# sourceMappingURL=reactive-graph.d.ts.map