/**
 * Base Generator Class
 * Abstract base class providing common functionality for all generators
 */
import type { IDatabaseConnection, IGeneratedFile, IGeneratorOptions, IGeneratorResult } from '../types';
import type { Client } from 'pg';
export declare abstract class BaseGenerator {
    protected client: Client;
    protected options: IGeneratorOptions;
    protected connection: IDatabaseConnection;
    protected schema: string;
    constructor(client: Client, connection: IDatabaseConnection, options: IGeneratorOptions);
    /**
     * Abstract method to generate content - must be implemented by subclasses
     */
    abstract generate(): Promise<IGeneratedFile[]>;
    /**
     * Generate and output files based on options
     */
    execute(): Promise<IGeneratorResult>;
    /**
     * Get the name of this generator for logging
     */
    protected abstract getGeneratorName(): string;
    /**
     * Output files to stdout — kept as plain console.log for piping the generated SQL.
     */
    private outputToStdout;
    /**
     * Output files to disk
     */
    private outputToFiles;
    /**
     * Generate SQL header with metadata
     */
    protected generateHeader(title: string, description: string): string;
    /**
     * Generate SQL footer
     */
    protected generateFooter(): string;
    /**
     * Format SQL with proper indentation
     */
    protected formatSQL(sql: string, indentLevel?: number): string;
    /**
     * Escape SQL identifiers
     */
    protected escapeIdentifier(identifier: string): string;
    /**
     * Escape SQL string literals
     */
    protected escapeString(str: string): string;
    /**
     * Generate comment block
     */
    protected generateComment(comment: string): string;
    /**
     * Generate section header
     */
    protected generateSectionHeader(title: string): string;
    /**
     * Check if generation should be skipped based on options
     */
    protected shouldSkip(): boolean;
    /**
     * Validate required data before generation
     */
    protected validateData(): Promise<void>;
    /**
     * Get database connection info for logging
     */
    protected getConnectionInfo(): string;
    /**
     * Generate schema creation SQL if not using public schema
     * This ensures generated files can be run on blank databases
     */
    protected generateSchemaCreationSQL(): string;
}
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