import type { Response } from './server';
declare const REDIRECT_STATUSES: readonly [300, 301, 302, 303, 305, 307, 308];
declare const DEFAULT_REDIRECT_STATUS = 302;
declare const TEXT_HTML_CONTENT_TYPE = "text/html";
declare const TEXT_PLAIN_CONTENT_TYPE = "text/plain";
export type RedirectStatus = (typeof REDIRECT_STATUSES)[number];
type DefaultValue<ContentType extends string> = ContentType extends typeof TEXT_HTML_CONTENT_TYPE | typeof TEXT_PLAIN_CONTENT_TYPE | `${typeof TEXT_HTML_CONTENT_TYPE};${string}` | `${typeof TEXT_PLAIN_CONTENT_TYPE};${string}` ? string : null;
/**
 * This hack is needed to use the provided generic types defaults rather than their inferred values.
 * For example, this should result in error because the default status is 302:
 * ```typescript
 * const response: Response<308, 'text/html', string, { Location: string }> = redirect('/');
 * ```
 * But it will pass if type inference is not prevented.
 */
type PreventGenericDefaultValueOverride<T> = [T][T extends unknown ? 0 : never];
/**
 * Use to perform HTTP redirect.
 * @param url an absolute or relative URL string. Will be encoded with `encodeurl` and set as "Location" header (@see https://github.com/pillarjs/encodeurl).
 * @param options optional `status`, `contentType`, `value` that will override the default ones. Default `status` is 302, `contentType` is "text/html".
 * @returns redirect server response.
 */
export declare function redirect<Status extends RedirectStatus = typeof DEFAULT_REDIRECT_STATUS, ContentType extends string = typeof TEXT_HTML_CONTENT_TYPE, Value = DefaultValue<ContentType>>(url: string, options?: {
    status?: Status;
    contentType?: ContentType;
    value?: Value;
}): Response<PreventGenericDefaultValueOverride<Status>, PreventGenericDefaultValueOverride<ContentType>, PreventGenericDefaultValueOverride<Value>, {
    Location: string;
}>;
export {};