import { z } from 'zod';
/**
 * Environment configuration schema with validation
 */
declare const envConfigSchema: z.ZodObject<{
    AWS_REGION: z.ZodDefault<z.ZodString>;
    PORT: z.ZodDefault<z.ZodString>;
    NODE_ENV: z.ZodDefault<z.ZodEnum<["development", "production", "test"]>>;
    AWS_ACCESS_KEY_ID: z.ZodOptional<z.ZodString>;
    AWS_SECRET_ACCESS_KEY: z.ZodOptional<z.ZodString>;
    AWS_SESSION_TOKEN: z.ZodOptional<z.ZodString>;
    AWS_PROFILE: z.ZodOptional<z.ZodString>;
    ENABLE_CLOUDWATCH_METRICS: z.ZodDefault<z.ZodOptional<z.ZodString>>;
    CLOUDWATCH_METRICS_NAMESPACE: z.ZodDefault<z.ZodOptional<z.ZodString>>;
}, "strip", z.ZodTypeAny, {
    AWS_REGION: string;
    PORT: string;
    NODE_ENV: "development" | "production" | "test";
    ENABLE_CLOUDWATCH_METRICS: string;
    CLOUDWATCH_METRICS_NAMESPACE: string;
    AWS_ACCESS_KEY_ID?: string | undefined;
    AWS_SECRET_ACCESS_KEY?: string | undefined;
    AWS_SESSION_TOKEN?: string | undefined;
    AWS_PROFILE?: string | undefined;
}, {
    AWS_REGION?: string | undefined;
    PORT?: string | undefined;
    NODE_ENV?: "development" | "production" | "test" | undefined;
    AWS_ACCESS_KEY_ID?: string | undefined;
    AWS_SECRET_ACCESS_KEY?: string | undefined;
    AWS_SESSION_TOKEN?: string | undefined;
    AWS_PROFILE?: string | undefined;
    ENABLE_CLOUDWATCH_METRICS?: string | undefined;
    CLOUDWATCH_METRICS_NAMESPACE?: string | undefined;
}>;
/**
 * Type for validated environment configuration
 */
export type EnvConfig = z.infer<typeof envConfigSchema>;
/**
 * Load and validate environment configuration
 * @param forceRefresh Force refresh the configuration cache
 * @returns Validated environment configuration
 */
export declare function loadEnvConfig(forceRefresh?: boolean): EnvConfig;
/**
 * Get current environment configuration
 * @returns Validated environment configuration
 */
export declare function getConfig(): EnvConfig;
export {};