/**
 * EnvironmentManager - JetBrains HTTP Client Compatible Environment Management
 *
 * Supports:
 * - http-client.env.json (public environments)
 * - http-client.private.env.json (private/sensitive variables)
 * - Multiple environment selection (dev, prod, test, etc.)
 * - Nested variable access with dot notation
 * - Runtime variable overrides
 */
export interface EnvironmentConfig {
    [envName: string]: EnvironmentVariables;
}
export interface EnvironmentVariables {
    [key: string]: string | number | boolean | object | unknown[];
}
export declare class EnvironmentManager {
    private baseDir;
    private publicEnv;
    private privateEnv;
    private mergedEnv;
    private currentEnvName;
    private runtimeVariables;
    constructor(baseDir: string);
    /**
     * Load environment files from the base directory
     */
    load(): Promise<void>;
    private loadPublicEnv;
    private loadPrivateEnv;
    private loadEnvFile;
    private mergeEnvironments;
    /**
     * Get list of available environment names
     */
    getAvailableEnvironments(): string[];
    /**
     * Select an environment by name
     */
    selectEnvironment(envName: string): void;
    /**
     * Get the currently selected environment name
     */
    getCurrentEnvironment(): string | undefined;
    /**
     * Auto-select a default environment
     * Priority: dev > development > first available
     */
    autoSelectDefaultEnvironment(): void;
    /**
     * Get a variable value from the current environment
     * Supports dot notation for nested values (e.g., "database.host")
     */
    getVariable(key: string): unknown;
    private getNestedValue;
    /**
     * Get all variables for the current environment
     */
    getAllVariables(): EnvironmentVariables;
    /**
     * Set a runtime variable that overrides environment values
     */
    setRuntimeVariable(key: string, value: unknown): void;
    /**
     * Replace {{variable}} placeholders in a string with environment values
     */
    replaceVariables(content: string): string;
    /**
     * Export variables to a format compatible with VariableManager
     */
    exportToVariables(): Record<string, string | number | boolean>;
    private flattenObject;
}