type AuthToken = string | undefined;
interface Auth {
    /**
     * Which part of the request do we use to send the auth?
     *
     * @default 'header'
     */
    in?: 'header' | 'query' | 'cookie';
    /**
     * A unique identifier for the security scheme.
     *
     * Defined only when there are multiple security schemes whose `Auth`
     * shape would otherwise be identical.
     */
    key?: string;
    /**
     * Header or query parameter name.
     *
     * @default 'Authorization'
     */
    name?: string;
    scheme?: 'basic' | 'bearer';
    type: 'apiKey' | 'http';
}

interface SerializerOptions<T> {
    /**
     * @default true
     */
    explode: boolean;
    style: T;
}
type ArrayStyle = 'form' | 'spaceDelimited' | 'pipeDelimited';
type ObjectStyle = 'form' | 'deepObject';

type QuerySerializer = (query: Record<string, unknown>) => string;
type BodySerializer = (body: unknown) => unknown;
type QuerySerializerOptionsObject = {
    allowReserved?: boolean;
    array?: Partial<SerializerOptions<ArrayStyle>>;
    object?: Partial<SerializerOptions<ObjectStyle>>;
};
type QuerySerializerOptions = QuerySerializerOptionsObject & {
    /**
     * Per-parameter serialization overrides. When provided, these settings
     * override the global array/object settings for specific parameter names.
     */
    parameters?: Record<string, QuerySerializerOptionsObject>;
};
declare const formDataBodySerializer: {
    bodySerializer: (body: unknown) => FormData;
};
declare const jsonBodySerializer: {
    bodySerializer: (body: unknown) => string;
};
declare const urlSearchParamsBodySerializer: {
    bodySerializer: (body: unknown) => string;
};

type HttpMethod = 'connect' | 'delete' | 'get' | 'head' | 'options' | 'patch' | 'post' | 'put' | 'trace';
type Client$1<RequestFn = never, Config = unknown, MethodFn = never, BuildUrlFn = never, SseFn = never> = {
    /**
     * Returns the final request URL.
     */
    buildUrl: BuildUrlFn;
    getConfig: () => Config;
    request: RequestFn;
    setConfig: (config: Config) => Config;
} & {
    [K in HttpMethod]: MethodFn;
} & ([SseFn] extends [never] ? {
    sse?: never;
} : {
    sse: {
        [K in HttpMethod]: SseFn;
    };
});
interface Config$1 {
    /**
     * Auth token or a function returning auth token. The resolved value will be
     * added to the request payload as defined by its `security` array.
     */
    auth?: ((auth: Auth) => Promise<AuthToken> | AuthToken) | AuthToken;
    /**
     * A function for serializing request body parameter. By default,
     * {@link JSON.stringify()} will be used.
     */
    bodySerializer?: BodySerializer | null;
    /**
     * An object containing any HTTP headers that you want to pre-populate your
     * `Headers` object with.
     *
     * {@link https://developer.mozilla.org/docs/Web/API/Headers/Headers#init See more}
     */
    headers?: RequestInit['headers'] | Record<string, string | number | boolean | (string | number | boolean)[] | null | undefined | unknown>;
    /**
     * The request method.
     *
     * {@link https://developer.mozilla.org/docs/Web/API/fetch#method See more}
     */
    method?: Uppercase<HttpMethod>;
    /**
     * A function for serializing request query parameters. By default, arrays
     * will be exploded in form style, objects will be exploded in deepObject
     * style, and reserved characters are percent-encoded.
     *
     * This method will have no effect if the native `paramsSerializer()` Axios
     * API function is used.
     *
     * {@link https://swagger.io/docs/specification/serialization/#query View examples}
     */
    querySerializer?: QuerySerializer | QuerySerializerOptions;
    /**
     * A function validating request data. This is useful if you want to ensure
     * the request conforms to the desired shape, so it can be safely sent to
     * the server.
     */
    requestValidator?: (data: unknown) => Promise<unknown>;
    /**
     * A function transforming response data before it's returned. This is useful
     * for post-processing data, e.g., converting ISO strings into Date objects.
     */
    responseTransformer?: (data: unknown) => Promise<unknown>;
    /**
     * A function validating response data. This is useful if you want to ensure
     * the response conforms to the desired shape, so it can be safely passed to
     * the transformers and returned to the user.
     */
    responseValidator?: (data: unknown) => Promise<unknown>;
}
/**
 * Arbitrary metadata passed through the `meta` request option.
 */
interface ClientMeta {
}

type ServerSentEventsOptions<TData = unknown> = Omit<RequestInit, 'method'> & Pick<Config$1, 'method' | 'responseTransformer' | 'responseValidator'> & {
    /**
     * Fetch API implementation. You can use this option to provide a custom
     * fetch instance.
     *
     * @default globalThis.fetch
     */
    fetch?: typeof fetch;
    /**
     * Implementing clients can call request interceptors inside this hook.
     */
    onRequest?: (url: string, init: RequestInit) => Promise<Request>;
    /**
     * Callback invoked when a network or parsing error occurs during streaming.
     *
     * This option applies only if the endpoint returns a stream of events.
     *
     * @param error The error that occurred.
     */
    onSseError?: (error: unknown) => void;
    /**
     * Callback invoked when an event is streamed from the server.
     *
     * This option applies only if the endpoint returns a stream of events.
     *
     * @param event Event streamed from the server.
     * @returns Nothing (void).
     */
    onSseEvent?: (event: StreamEvent<TData>) => void;
    serializedBody?: RequestInit['body'];
    /**
     * Default retry delay in milliseconds.
     *
     * This option applies only if the endpoint returns a stream of events.
     *
     * @default 3000
     */
    sseDefaultRetryDelay?: number;
    /**
     * Maximum number of retry attempts before giving up.
     */
    sseMaxRetryAttempts?: number;
    /**
     * Maximum retry delay in milliseconds.
     *
     * Applies only when exponential backoff is used.
     *
     * This option applies only if the endpoint returns a stream of events.
     *
     * @default 30000
     */
    sseMaxRetryDelay?: number;
    /**
     * Optional sleep function for retry backoff.
     *
     * Defaults to using `setTimeout`.
     */
    sseSleepFn?: (ms: number) => Promise<void>;
    url: string;
};
interface StreamEvent<TData = unknown> {
    data: TData;
    event?: string;
    id?: string;
    retry?: number;
}
type ServerSentEventsResult<TData = unknown, TReturn = void, TNext = unknown> = {
    stream: AsyncGenerator<TData extends Record<string, unknown> ? TData[keyof TData] : TData, TReturn, TNext>;
};

declare const mergeHeaders: (...headers: Array<Required<Config>["headers"] | undefined>) => Headers;
type ErrInterceptor<Err, Res, Req, Options> = (error: Err, 
/** response may be undefined due to a network error where no response object is produced */
response: Res | undefined, 
/** request may be undefined, because error may be from building the request object itself */
request: Req | undefined, options: Options) => Err | Promise<Err>;
type ReqInterceptor<Req, Options> = (request: Req, options: Options) => Req | Promise<Req>;
type ResInterceptor<Res, Req, Options> = (response: Res, request: Req, options: Options) => Res | Promise<Res>;
declare class Interceptors<Interceptor> {
    fns: Array<Interceptor | null>;
    clear(): void;
    eject(id: number | Interceptor): void;
    exists(id: number | Interceptor): boolean;
    getInterceptorIndex(id: number | Interceptor): number;
    update(id: number | Interceptor, fn: Interceptor): number | Interceptor | false;
    use(fn: Interceptor): number;
}
interface Middleware<Req, Res, Err, Options> {
    error: Interceptors<ErrInterceptor<Err, Res, Req, Options>>;
    request: Interceptors<ReqInterceptor<Req, Options>>;
    response: Interceptors<ResInterceptor<Res, Req, Options>>;
}
declare const createConfig: <T extends ClientOptions = ClientOptions>(override?: Config<Omit<ClientOptions, keyof T> & T>) => Config<Omit<ClientOptions, keyof T> & T>;

type ResponseStyle = 'data' | 'fields';
interface Config<T extends ClientOptions = ClientOptions> extends Omit<RequestInit, 'body' | 'headers' | 'method'>, Config$1 {
    /**
     * Base URL for all requests made by this client.
     */
    baseUrl?: T['baseUrl'];
    /**
     * Fetch API implementation. You can use this option to provide a custom
     * fetch instance.
     *
     * @default globalThis.fetch
     */
    fetch?: typeof fetch;
    /**
     * Please don't use the Fetch client for Next.js applications. The `next`
     * options won't have any effect.
     *
     * Install {@link https://www.npmjs.com/package/@hey-api/client-next `@hey-api/client-next`} instead.
     */
    next?: never;
    /**
     * Return the response data parsed in a specified format. By default, `auto`
     * will infer the appropriate method from the `Content-Type` response header.
     * You can override this behavior with any of the {@link Body} methods.
     * Select `stream` if you don't want to parse response data at all.
     *
     * @default 'auto'
     */
    parseAs?: 'arrayBuffer' | 'auto' | 'blob' | 'formData' | 'json' | 'stream' | 'text';
    /**
     * Should we return only data or multiple fields (data, error, response, etc.)?
     *
     * @default 'fields'
     */
    responseStyle?: ResponseStyle;
    /**
     * Throw an error instead of returning it in the response?
     *
     * @default false
     */
    throwOnError?: T['throwOnError'];
}
interface RequestOptions<TData = unknown, TResponseStyle extends ResponseStyle = 'fields', ThrowOnError extends boolean = boolean, Url extends string = string> extends Config<{
    responseStyle: TResponseStyle;
    throwOnError: ThrowOnError;
}>, Pick<ServerSentEventsOptions<TData>, 'onRequest' | 'onSseError' | 'onSseEvent' | 'sseDefaultRetryDelay' | 'sseMaxRetryAttempts' | 'sseMaxRetryDelay'> {
    /**
     * Any body that you want to add to your request.
     *
     * {@link https://developer.mozilla.org/docs/Web/API/fetch#body}
     */
    body?: unknown;
    path?: Record<string, unknown>;
    query?: Record<string, unknown>;
    /**
     * Security mechanism(s) to use for the request.
     */
    security?: ReadonlyArray<Auth>;
    url: Url;
}
interface ResolvedRequestOptions<TResponseStyle extends ResponseStyle = 'fields', ThrowOnError extends boolean = boolean, Url extends string = string> extends RequestOptions<unknown, TResponseStyle, ThrowOnError, Url> {
    headers: Headers;
    serializedBody?: string;
}
type RequestResult<TData = unknown, TError = unknown, ThrowOnError extends boolean = boolean, TResponseStyle extends ResponseStyle = 'fields'> = ThrowOnError extends true ? Promise<TResponseStyle extends 'data' ? TData extends Record<string, unknown> ? TData[keyof TData] : TData : {
    data: TData extends Record<string, unknown> ? TData[keyof TData] : TData;
    request: Request;
    response: Response;
}> : Promise<TResponseStyle extends 'data' ? (TData extends Record<string, unknown> ? TData[keyof TData] : TData) | undefined : ({
    data: TData extends Record<string, unknown> ? TData[keyof TData] : TData;
    error: undefined;
} | {
    data: undefined;
    error: TError extends Record<string, unknown> ? TError[keyof TError] : TError;
}) & {
    /** request may be undefined, because error may be from building the request object itself */
    request?: Request;
    /** response may be undefined, because error may be from building the request object itself or from a network error */
    response?: Response;
}>;
interface ClientOptions {
    baseUrl?: string;
    responseStyle?: ResponseStyle;
    throwOnError?: boolean;
}
type MethodFn = <TData = unknown, TError = unknown, ThrowOnError extends boolean = false, TResponseStyle extends ResponseStyle = 'fields'>(options: Omit<RequestOptions<TData, TResponseStyle, ThrowOnError>, 'method'>) => RequestResult<TData, TError, ThrowOnError, TResponseStyle>;
type SseFn = <TData = unknown, _TError = unknown, ThrowOnError extends boolean = false, TResponseStyle extends ResponseStyle = 'fields'>(options: Omit<RequestOptions<never, TResponseStyle, ThrowOnError>, 'method'>) => Promise<ServerSentEventsResult<TData>>;
type RequestFn = <TData = unknown, TError = unknown, ThrowOnError extends boolean = false, TResponseStyle extends ResponseStyle = 'fields'>(options: Omit<RequestOptions<TData, TResponseStyle, ThrowOnError>, 'method'> & Pick<Required<RequestOptions<TData, TResponseStyle, ThrowOnError>>, 'method'>) => RequestResult<TData, TError, ThrowOnError, TResponseStyle>;
type BuildUrlFn = <TData extends {
    body?: unknown;
    path?: Record<string, unknown>;
    query?: Record<string, unknown>;
    url: string;
}>(options: TData & Options<TData>) => string;
type Client = Client$1<RequestFn, Config, MethodFn, BuildUrlFn, SseFn> & {
    interceptors: Middleware<Request, Response, unknown, ResolvedRequestOptions>;
};
/**
 * The `createClientConfig()` function will be called on client initialization
 * and the returned object will become the client's initial configuration.
 *
 * You may want to initialize your client this way instead of calling
 * `setConfig()`. This is useful for example if you're using Next.js
 * to ensure your client always has the correct values.
 */
type CreateClientConfig<T extends ClientOptions = ClientOptions> = (override?: Config<ClientOptions & T>) => Config<Required<ClientOptions> & T>;
interface TDataShape {
    body?: unknown;
    headers?: unknown;
    path?: unknown;
    query?: unknown;
    url: string;
}
type OmitKeys<T, K> = Pick<T, Exclude<keyof T, K>>;
type Options<TData extends TDataShape = TDataShape, ThrowOnError extends boolean = boolean, TResponse = unknown, TResponseStyle extends ResponseStyle = 'fields'> = OmitKeys<RequestOptions<TResponse, TResponseStyle, ThrowOnError>, 'body' | 'path' | 'query' | 'url'> & ([TData] extends [never] ? unknown : Omit<TData, 'url'>);

export { type Auth as A, type Config as C, type Options as O, type QuerySerializerOptions as Q, type RequestOptions as R, type ServerSentEventsResult as S, type TDataShape as T, type Client as a, type ClientOptions as b, type ClientMeta as c, type CreateClientConfig as d, type RequestResult as e, type ResolvedRequestOptions as f, type ResponseStyle as g, createConfig as h, formDataBodySerializer as i, jsonBodySerializer as j, mergeHeaders as m, urlSearchParamsBodySerializer as u };