/**
 * BranchService
 *
 * Manages database branching by creating/deleting PostgreSQL databases
 * using `CREATE DATABASE ... TEMPLATE`. Branch metadata is stored in the
 * `rebase.branches` table in the default (main) database, following the
 * same `rebase` schema convention used by entity_history, auth, etc.
 */
import { BranchInfo } from "@rebasepro/types";
import { DrizzleClient } from "../interfaces";
import { DatabasePoolManager } from "../databasePoolManager";
export declare class BranchService {
    private db;
    private poolManager;
    constructor(db: DrizzleClient, poolManager: DatabasePoolManager);
    /**
     * Ensure the `rebase.branches` metadata table exists in the default database.
     * Idempotent — safe to call on every startup.
     */
    ensureBranchMetadataTable(): Promise<void>;
    /**
     * Create a new branch database by templating the source database.
     *
     * Uses `CREATE DATABASE ... TEMPLATE` for an instant, full-fidelity copy
     * of both schema and data.
     *
     * @param name   User-facing branch name (e.g., "feature_auth")
     * @param options.source  Source database to clone; defaults to the main database.
     */
    createBranch(name: string, options?: {
        source?: string;
    }): Promise<BranchInfo>;
    /**
     * Delete a branch database and remove its metadata.
     * Cannot delete the main/default database.
     */
    deleteBranch(name: string): Promise<void>;
    /**
     * List all branches recorded in the metadata table.
     * Optionally fetches database sizes from pg_database.
     */
    listBranches(): Promise<BranchInfo[]>;
    /**
     * Get info about a specific branch.
     */
    getBranchInfo(name: string): Promise<BranchInfo | undefined>;
}