import type { ArangoDBConfig } from '../config.js';
import type { SchemaMigration } from './migrations.js';
export declare class MigrationPerformer {
    private readonly config;
    private readonly db;
    constructor(config: ArangoDBConfig);
    performMigration(migration: SchemaMigration): Promise<void>;
    private createPersistentIndex;
    private dropIndex;
    private dropVectorIndex;
    /**
     * Creates a new vector index (for first-time creation or recreation from an existing one).
     *
     * Both CreateVectorIndexMigration and RecreateVectorIndexMigration are executed identically:
     * 1. Determine the target slot from requiredIndex.slot
     * 2. Call ensureIndex with slot-pinned defaultNProbe (A->1, B->2) to avoid dedup
     * 3. Wait for the new index to become ready
     * 4. If existingIndex is present (recreate): drop the old index
     */
    private createOrRecreateVectorIndex;
    /**
     * Polls the ArangoDB index API until the vector index reports trainingState "ready".
     *
     * ArangoDB 3.12.9+ reports a `trainingState` field on vector indexes. While the
     * index is still being trained, this field is set to a value other than "ready"
     * (e.g. "training"). We poll at a fixed interval until the index reports "ready"
     * or the timeout is exceeded.
     *
     * If the ArangoDB version does not report trainingState (pre-3.12.9), the method
     * returns immediately - ensureIndex in those versions blocks until training completes.
     */
    waitForVectorIndexReady(collectionName: string, indexName: string, { pollIntervalMs, timeoutMs, }?: {
        pollIntervalMs?: number;
        timeoutMs?: number;
    }): Promise<void>;
    private createDocumentCollection;
    private createEdgeCollection;
    private createArangoSearchView;
    private updateArangoSearchView;
    private dropArangoSearchView;
    private recreateArangoSearchView;
    private createArangoSearchAnalyzer;
    private updateArangoSearchAnalyzer;
}