/**
 * Smart Relation Detector
 *
 * Uses heuristics and schema analysis to detect relationships between tables:
 * - Explicit foreign keys (highest confidence)
 * - Junction tables for ManyToMany
 * - Unique FK columns for OneToOne
 */
import type { SchemaAST } from '../../schema/schemaAST.js';
import type { DetectedRelation } from '../../schema/types.js';
/**
 * Configuration for relation detection.
 */
export interface RelationDetectorOptions {
    /** Minimum confidence threshold (0-1) to include in results */
    minConfidence?: number;
    /** Custom singularize function */
    singularize?: (name: string) => string;
}
/**
 * Detects relationships in a SchemaAST using multiple heuristics.
 */
export declare class SmartRelationDetector {
    private readonly ast;
    private readonly options;
    constructor(ast: SchemaAST, options?: RelationDetectorOptions);
    /**
     * Detect all relationships in the schema.
     */
    detectAll(): DetectedRelation[];
    /**
     * Detect junction tables that represent ManyToMany relationships.
     */
    private detectJunctionTables;
    /**
     * Detect relations where unique FK should upgrade to OneToOne.
     */
    private detectOneToOneRelations;
    /**
     * Default singularize function (delegates to shared utility).
     */
    private defaultSingularize;
}
/**
 * Create a SmartRelationDetector for the given AST.
 */
export declare function createRelationDetector(ast: SchemaAST, options?: RelationDetectorOptions): SmartRelationDetector;
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