import { z } from 'zod';
export { z } from 'zod';

type EnvSchema = Record<string, z.ZodTypeAny>;
interface EnvConfig<TClient extends EnvSchema, TServer extends EnvSchema> {
    client: TClient;
    server: TServer;
}
interface EnvOptions {
    exampleFile?: string;
    allowMissingInProduction?: boolean;
    onValidationError?: (error: z.ZodError) => void;
    strict?: boolean;
    debug?: boolean;
}
type InferClient<T extends EnvSchema> = {
    [K in keyof T]: z.infer<T[K]>;
};
type InferServer<T extends EnvSchema> = {
    [K in keyof T]: z.infer<T[K]>;
};
type InferEnv<TClient extends EnvSchema, TServer extends EnvSchema> = InferClient<TClient> & InferServer<TServer>;
/**
 * Zod 4 utility functions for common environment variable patterns
 */
declare const envUtils: {
    /**
     * Creates a boolean environment variable parser with improved Zod 4 validation
     * Accepts 'true', 'false', '1', '0', 'yes', 'no' (case insensitive)
     */
    boolean: () => z.ZodPipe<z.ZodString, z.ZodTransform<boolean, string>>;
    /**
     * Creates a number environment variable parser with Zod 4's improved validation
     */
    number: () => z.ZodPipe<z.ZodString, z.ZodTransform<number, string>>;
    /**
     * Creates an integer environment variable parser
     */
    integer: () => z.ZodPipe<z.ZodString, z.ZodTransform<number, string>>;
    /**
     * Creates a URL environment variable parser with Zod 4's improved URL validation
     */
    url: () => z.ZodString;
    /**
     * Creates an email environment variable parser with Zod 4's improved email validation
     */
    email: () => z.ZodString;
    /**
     * Creates a port number parser (1-65535)
     */
    port: () => z.ZodPipe<z.ZodString, z.ZodTransform<number, string>>;
    /**
     * Creates a JSON environment variable parser with Zod 4's improved error handling
     */
    json: <T>(schema?: z.ZodType<T>) => z.ZodPipe<z.ZodString, z.ZodTransform<any, string>>;
    /**
     * Creates a comma-separated list parser
     */
    list: (separator?: string) => z.ZodPipe<z.ZodString, z.ZodTransform<string[], string>>;
    /**
     * Creates a secret key parser with minimum length validation
     */
    secret: (minLength?: number) => z.ZodString;
};
/**
 * Creates a type-safe environment variable validator with support for nested objects and transforms
 * @param config - Configuration object with client and server schemas
 * @param options - Optional configuration for validation behavior
 * @returns Validated environment variables with full type inference
 */
declare function createEnv<TClient extends EnvSchema, TServer extends EnvSchema>(config: EnvConfig<TClient, TServer>, options?: EnvOptions): InferEnv<TClient, TServer>;
/**
 * Creates a public-only environment validator (for client-side only)
 * @param schema - Schema for public environment variables
 * @param options - Optional configuration
 * @returns Validated environment variables
 */
declare function createPublicEnv<TClient extends EnvSchema>(schema: TClient, options?: EnvOptions): InferClient<TClient>;
declare function _clearEnvCacheForTests(): void;

export { type EnvConfig, type EnvOptions, type EnvSchema, type InferClient, type InferEnv, type InferServer, _clearEnvCacheForTests, createEnv, createPublicEnv, createEnv as default, envUtils };