import type { IndexDatabase } from '../db/database-facade.js';
import type { SyncResult } from './incremental-indexer.js';
/**
 * Enrichment strategy for the sync pipeline.
 *
 * - 'full': Clear + rebuild all layers (existing --force behavior)
 * - 'incremental': Process only dirty subsets at each layer
 * - 'none': No enrichment needed (no changes or no dirty entries)
 */
export type EnrichmentStrategy = 'full' | 'incremental' | 'none';
/**
 * Thresholds for deciding when to fall back from incremental to full rebuild.
 * All ratios are 0..1.
 */
export interface StrategyThresholds {
    /** Fall back to full rebuild if > this fraction of definitions changed (default 0.40) */
    defsChangedRatio: number;
    /** Fall back to full rebuild if > this fraction of modules affected (default 0.60) */
    modulesAffectedRatio: number;
    /** Fall back to full rebuild for interactions if > this fraction affected (default 0.70) */
    interactionsAffectedRatio: number;
}
export declare const DEFAULT_THRESHOLDS: StrategyThresholds;
export interface StrategyDecision {
    strategy: EnrichmentStrategy;
    reason: string;
    metrics: {
        totalDefinitions: number;
        changedDefinitions: number;
        changeRatio: number;
        totalModules: number;
        affectedModules: number;
        moduleRatio: number;
        totalInteractions: number;
        affectedInteractions: number;
        interactionRatio: number;
    };
}
/**
 * Decide whether to use incremental or full enrichment based on change scope.
 *
 * Rules:
 * 1. No changes → 'none'
 * 2. No modules exist → 'full' (first enrichment must be full)
 * 3. Change ratio > threshold → 'full' (incremental overhead exceeds savings)
 * 4. Otherwise → 'incremental'
 */
export declare function selectStrategy(db: IndexDatabase, syncResult: SyncResult, thresholds?: StrategyThresholds): StrategyDecision;
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