import { EntityExplorerService } from './entity-explorer.service';
import { PostgresCollector } from '../collectors/postgres-collector';
import { MysqlCollector } from '../collectors/mysql-collector';
export interface ErdColumn {
    name: string;
    type: string;
    nullable: boolean;
    isPrimary: boolean;
    isForeign: boolean;
}
export interface ErdTable {
    name: string;
    columns: ErdColumn[];
}
export interface ErdRelation {
    fromTable: string;
    fromColumn: string;
    toTable: string;
    toColumn: string;
    cardinality: '1:1' | '1:N';
}
export type ErdSourceType = 'postgresql' | 'mysql' | 'entities';
export interface ErdSchema {
    source: ErdSourceType;
    label: string;
    database?: string;
    tableCount: number;
    relationCount: number;
    tables: ErdTable[];
    relations: ErdRelation[];
    mermaid: string;
    error?: string;
}
export declare class ErdService {
    private readonly entityExplorer;
    private readonly pgCollector;
    private readonly mysqlCollector;
    private readonly logger;
    private readonly externalPgConfigs;
    private readonly externalMysqlConfigs;
    constructor(entityExplorer: EntityExplorerService, pgCollector: PostgresCollector, mysqlCollector: MysqlCollector);
    registerPostgresConnection(label: string, config: Record<string, any>): void;
    registerMysqlConnection(label: string, config: Record<string, any>): void;
    getSchemas(): Promise<ErdSchema[]>;
    private pgEnvConfig;
    private buildPostgresSchema;
    private buildMysqlSchemaFromConfig;
    private buildEntityFallback;
    private buildSchema;
    private toMermaid;
    private sanitiseType;
    private safeName;
}