refactor: fix circular dependencies

src/factory.ts

@@ -0,0 +1,12 @@
+import { HttpProxyMiddleware } from './http-proxy-middleware';
+import type { Options, RequestHandler, NextFunction } from './types';
+import type * as http from 'http';
+
+export function createProxyMiddleware<
+  TReq = http.IncomingMessage,
+  TRes = http.ServerResponse,
+  TNext = NextFunction,
+>(options: Options<TReq, TRes>): RequestHandler<TReq, TRes, TNext> {
+  const { middleware } = new HttpProxyMiddleware<TReq, TRes>(options);
+  return middleware as unknown as RequestHandler<TReq, TRes, TNext>;
+}

src/index.ts

@@ -1,15 +1,4 @@
-import { HttpProxyMiddleware } from './http-proxy-middleware';
-import type { Options, RequestHandler, NextFunction } from './types';
-import type * as http from 'http';
-
-export function createProxyMiddleware<
-  TReq = http.IncomingMessage,
-  TRes = http.ServerResponse,
-  TNext = NextFunction,
->(options: Options<TReq, TRes>): RequestHandler<TReq, TRes, TNext> {
-  const { middleware } = new HttpProxyMiddleware<TReq, TRes>(options);
-  return middleware as unknown as RequestHandler<TReq, TRes, TNext>;
-}
+export * from './factory';
 
 export * from './handlers';
 

src/legacy/create-proxy-middleware.ts

@@ -1,4 +1,4 @@
-import { createProxyMiddleware } from '..';
+import { createProxyMiddleware } from '../factory';
 import { Debug } from '../debug';
 import { Filter, RequestHandler } from '../types';
 import { legacyOptionsAdapter } from './options-adapter';

src/legacy/options-adapter.ts

@@ -1,5 +1,5 @@
 import * as url from 'url';
-import { Filter, Options } from '..';
+import { Filter, Options } from '../types';
 import { LegacyOptions } from './types';
 import { Debug } from '../debug';
 import { getLogger } from '../logger';

src/legacy/types.ts

@@ -1,5 +1,5 @@
 import type * as http from 'http';
-import { Options } from '..';
+import { Options } from '../types';
 
 /**
  * @deprecated