import { type SpawnOptions } from 'node:child_process';
import { type ConnectionConfig, type QueryClientContract } from '../../types/database.js';
/**
 * Contract implemented by dialect-specific schema dump handlers.
 */
export interface SchemaStateContract {
    dump(path: string): Promise<void>;
    load(path: string): Promise<void>;
}
/**
 * Base implementation shared across all dialects. Dialect-specific classes are
 * only responsible for producing the structural SQL dump. This class appends
 * Lucid migration metadata afterwards.
 */
export declare abstract class BaseSchemaState implements SchemaStateContract {
    protected client: QueryClientContract;
    protected connectionConfig: ConnectionConfig;
    protected schemaTableName: string;
    protected schemaVersionsTableName: string;
    constructor(client: QueryClientContract, connectionConfig: ConnectionConfig, schemaTableName: string, schemaVersionsTableName: string);
    /**
     * Dump the structural schema first and then append migrations metadata.
     */
    dump(path: string): Promise<void>;
    /**
     * Dialects must implement schema restore explicitly. Throwing here prevents
     * partial support from failing silently.
     */
    load(_path: string): Promise<void>;
    /**
     * Dump the dialect-specific structural schema to the provided path.
     */
    protected abstract dumpSchema(path: string): Promise<void>;
    /**
     * Export rows from Lucid's schema bookkeeping tables as `INSERT` statements.
     */
    protected dumpMigrationMetadata(): Promise<string>;
    /**
     * Stringify an insert statement using the active dialect query builder, so
     * values are escaped consistently with the current client.
     */
    protected stringifyInsert(tableName: string, row: Record<string, any>): string;
    /**
     * Helper to write a fully materialized dump to disk.
     */
    protected writeContents(path: string, contents: string): Promise<void>;
    /**
     * Collect stdout and stderr emitted by a child process. Individual helpers can
     * then decide which stream should be surfaced in case of failure.
     */
    private collectProcessOutput;
    /**
     * Wait for a spawned process to exit. Spawning failures reject immediately
     * through the `error` event.
     */
    private waitForProcessExit;
    /**
     * Create a user-facing process error, preferring stderr and then stdout for
     * tools that only report actionable details through standard output.
     */
    private createCommandError;
    /**
     * Stream CLI output directly to disk to avoid buffering large dumps in memory.
     */
    protected spawnToFile(command: string, args: string[], outputPath: string, options?: Omit<SpawnOptions, 'stdio'>): Promise<void>;
    /**
     * Stream a SQL file to a CLI process using stdin.
     */
    protected spawnFromFile(command: string, args: string[], inputPath: string, options?: Omit<SpawnOptions, 'stdio'>): Promise<void>;
    /**
     * Execute a CLI command and collect its output for actionable failures.
     */
    protected spawnCommand(command: string, args: string[], options?: Omit<SpawnOptions, 'stdio'>): Promise<string>;
}