/**
 * Search adapter factory — selects the appropriate backend by checking
 * whether the API base URL points to Anthropic's official endpoint.
 */

import { isFirstPartyAnthropicBaseUrl } from '../../../utils/model/providers.js'
import { ApiSearchAdapter } from './apiAdapter.js'
import { BingSearchAdapter } from './bingAdapter.js'
import type { WebSearchAdapter } from './types.js'

export type { SearchResult, SearchOptions, SearchProgress, WebSearchAdapter } from './types.js'

let cachedAdapter: WebSearchAdapter | null = null

export function createAdapter(): WebSearchAdapter {
	// 直接用 bing 适配器，跳过 API 适配器的选择逻辑
  return new BingSearchAdapter()
//   // Adapter is stateless — safe to reuse across calls within a session
//   if (cachedAdapter) return cachedAdapter

//   // Env override: WEB_SEARCH_ADAPTER=api|bing forces specific backend
//   const envAdapter = process.env.WEB_SEARCH_ADAPTER
//   if (envAdapter === 'api') {
//     cachedAdapter = new ApiSearchAdapter()
//     return cachedAdapter
//   }
//   if (envAdapter === 'bing') {
//     cachedAdapter = new BingSearchAdapter()
//     return cachedAdapter
//   }

//   // Anthropic official URL → API server-side search
//   if (isFirstPartyAnthropicBaseUrl()) {
//     cachedAdapter = new ApiSearchAdapter()
//     return cachedAdapter
//   }

//   // Third-party proxies / non-Anthropic endpoints → Bing fallback
//   cachedAdapter = new BingSearchAdapter()
//   return cachedAdapter
}