import { z } from 'zod';

/**
 * Environment configuration validation with Zod
 *
 * Provides type-safe configuration from environment variables
 * following 12-Factor App principles.
 *
 * @module config
 */

/**
 * Log level schema with validation
 */
declare const LogLevelSchema: z.ZodDefault<z.ZodEnum<{
    error: "error";
    warn: "warn";
    debug: "debug";
    info: "info";
}>>;
/**
 * Log format schema
 */
declare const LogFormatSchema: z.ZodDefault<z.ZodEnum<{
    json: "json";
    pretty: "pretty";
}>>;
/**
 * Logger backend schema
 */
declare const LoggerBackendSchema: z.ZodDefault<z.ZodEnum<{
    otel: "otel";
    pino: "pino";
    console: "console";
}>>;
/**
 * Node environment schema
 */
declare const NodeEnvSchema: z.ZodDefault<z.ZodEnum<{
    production: "production";
    development: "development";
    test: "test";
}>>;
/**
 * Boolean from string schema (for ENV variables)
 */
declare const BooleanFromStringSchema: z.ZodPipe<z.ZodDefault<z.ZodEnum<{
    0: "0";
    1: "1";
    true: "true";
    false: "false";
    yes: "yes";
    no: "no";
}>>, z.ZodTransform<boolean, "0" | "1" | "true" | "false" | "yes" | "no">>;
/**
 * Connectum environment configuration schema
 *
 * All environment variables with their defaults and validation.
 * Based on 12-Factor App configuration principles.
 *
 * @example
 * ```typescript
 * const config = ConnectumEnvSchema.parse(process.env);
 * console.log(config.PORT); // 5000 (default)
 * console.log(config.LOG_LEVEL); // 'info' (default)
 * ```
 */
declare const ConnectumEnvSchema: z.ZodObject<{
    PORT: z.ZodDefault<z.ZodCoercedNumber<unknown>>;
    LISTEN: z.ZodDefault<z.ZodString>;
    LOG_LEVEL: z.ZodDefault<z.ZodEnum<{
        error: "error";
        warn: "warn";
        debug: "debug";
        info: "info";
    }>>;
    LOG_FORMAT: z.ZodDefault<z.ZodEnum<{
        json: "json";
        pretty: "pretty";
    }>>;
    LOG_BACKEND: z.ZodDefault<z.ZodEnum<{
        otel: "otel";
        pino: "pino";
        console: "console";
    }>>;
    NODE_ENV: z.ZodDefault<z.ZodEnum<{
        production: "production";
        development: "development";
        test: "test";
    }>>;
    HTTP_HEALTH_ENABLED: z.ZodPipe<z.ZodDefault<z.ZodEnum<{
        0: "0";
        1: "1";
        true: "true";
        false: "false";
        yes: "yes";
        no: "no";
    }>>, z.ZodTransform<boolean, "0" | "1" | "true" | "false" | "yes" | "no">>;
    HTTP_HEALTH_PATH: z.ZodDefault<z.ZodString>;
    OTEL_SERVICE_NAME: z.ZodOptional<z.ZodString>;
    OTEL_EXPORTER_OTLP_ENDPOINT: z.ZodOptional<z.ZodString>;
    GRACEFUL_SHUTDOWN_ENABLED: z.ZodPipe<z.ZodDefault<z.ZodEnum<{
        0: "0";
        1: "1";
        true: "true";
        false: "false";
        yes: "yes";
        no: "no";
    }>>, z.ZodTransform<boolean, "0" | "1" | "true" | "false" | "yes" | "no">>;
    GRACEFUL_SHUTDOWN_TIMEOUT_MS: z.ZodDefault<z.ZodCoercedNumber<unknown>>;
}, z.core.$strip>;
/**
 * Connectum environment configuration type
 */
type ConnectumEnv = z.infer<typeof ConnectumEnvSchema>;
/**
 * Parse and validate environment configuration
 *
 * @example
 * ```typescript
 * const config = parseEnvConfig();
 * // or with custom env
 * const config = parseEnvConfig({ PORT: '8080' });
 * ```
 */
declare function parseEnvConfig(env?: Record<string, string | undefined>): ConnectumEnv;
/**
 * Safely parse environment configuration (returns result object)
 *
 * @example
 * ```typescript
 * const result = safeParseEnvConfig();
 * if (result.success) {
 *   console.log(result.data.PORT);
 * } else {
 *   console.error(result.error.format());
 * }
 * ```
 */
declare function safeParseEnvConfig(env?: Record<string, string | undefined>): z.ZodSafeParseResult<{
    PORT: number;
    LISTEN: string;
    LOG_LEVEL: "error" | "warn" | "debug" | "info";
    LOG_FORMAT: "json" | "pretty";
    LOG_BACKEND: "otel" | "pino" | "console";
    NODE_ENV: "production" | "development" | "test";
    HTTP_HEALTH_ENABLED: boolean;
    HTTP_HEALTH_PATH: string;
    GRACEFUL_SHUTDOWN_ENABLED: boolean;
    GRACEFUL_SHUTDOWN_TIMEOUT_MS: number;
    OTEL_SERVICE_NAME?: string | undefined;
    OTEL_EXPORTER_OTLP_ENDPOINT?: string | undefined;
}>;

export { BooleanFromStringSchema, type ConnectumEnv, ConnectumEnvSchema, LogFormatSchema, LogLevelSchema, LoggerBackendSchema, NodeEnvSchema, parseEnvConfig, safeParseEnvConfig };