import * as z4 from 'zod/v4/core';

type EnvObject = z4.$ZodObject<{
    [k: string]: z4.$ZodType<string | undefined>;
}>;
type ZodSafeParseReturnType = z4.util.SafeParseResult<Record<string, unknown>>;
interface Config {
    schema: EnvObject;
    envPath?: string;
    exitOnError?: boolean;
    logVars?: boolean;
}
interface InnerConfig extends Required<Omit<Config, 'exitOnError' | 'envPath'>> {
    vars: Record<string, string>;
}

/**
 * Validate environment variables against a Zod schema
 *
 * @param {Config} options The configuration object
 * @property {EnvObject} schema The schema to validate against (must be z.object with string-based fields)
 * @property {string} envPath - The path to the .env file. If none is provided, no file will be loaded`
 * @property {boolean} exitOnError - Whether to exit the process or throw if validation fails. Defaults to `false`
 * @property {boolean} logVars - Whether to output successfully parsed variables to the console. Defaults to `true`
 * @throws {Error} If a required environment variable is missing or invalid and `exitOnError` is `false`
 */
declare function validateEnvVars({ schema, envPath, exitOnError, logVars, }: Config): void;

export { type Config, type EnvObject, type InnerConfig, type ZodSafeParseReturnType, validateEnvVars as default };