/**
 * ConfigService - Centralized configuration management
 */
import { SettingsConfig, StaticSettings, ProjectConfig, AppConfig, DatabaseConfig } from '../types';
export declare class ConfigService {
    private static instance;
    private npmPath;
    private settingsConfig;
    private staticSettings;
    private projectConfig;
    private constructor();
    static getInstance(): ConfigService;
    /**
     * Initialize the config service
     */
    initialize(): Promise<void>;
    /**
     * Get npm installation path
     */
    getNpmPath(): string;
    /**
     * Get the active config location for a specific file
     */
    getConfigLocation(relativePath: string): 'user' | 'package' | null;
    /**
     * Get user config directory path
     */
    getUserConfigDir(): string;
    /**
     * Get package config directory path
     */
    getPackageConfigDir(): string;
    /**
     * Get settings configuration
     */
    getSettingsConfig(): SettingsConfig;
    /**
     * Get static settings
     */
    getStaticSettings(): StaticSettings;
    /**
     * Get project-specific configuration
     */
    getProjectConfig(): ProjectConfig | null;
    /**
     * Load database configuration
     */
    loadDatabaseConfig(type: 'staging' | 'production', databaseKey: string): DatabaseConfig;
    /**
     * Build complete app configuration
     */
    buildAppConfig(): AppConfig;
    /**
     * Load all configuration files
     */
    private loadConfigurations;
}
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