import { Tool } from "@langchain/core/tools";
import { search } from "duck-duck-scrape";
export { SafeSearchType, SearchTimeType, } from "duck-duck-scrape";
const DEFAULT_MAX_RESULTS = 10;
/**
 * DuckDuckGo tool integration.
 *
 * Setup:
 * Install `@langchain/community` and `duck-duck-scrape`.
 *
 * ```bash
 * npm install @langchain/community duck-duck-scrape
 * ```
 *
 * ## [Constructor args](https://api.js.langchain.com/classes/_langchain_community.tools_duckduckgo_search.DuckDuckGoSearch.html#constructor)
 *
 * <details open>
 * <summary><strong>Instantiate</strong></summary>
 *
 * ```typescript
 * import { DuckDuckGoSearch } from "@langchain/community/tools/duckduckgo_search";
 *
 * const tool = new DuckDuckGoSearch({ maxResults: 1 });
 * ```
 * </details>
 *
 * <br />
 *
 * <details>
 *
 * <summary><strong>Invocation</strong></summary>
 *
 * ```typescript
 * await tool.invoke("what is the current weather in sf?");
 *
 * // output: [{"title":"San Francisco, CA Current Weather | AccuWeather","link":"https://www.accuweather.com/en/us/san-francisco/94103/current-weather/347629","snippet":"<b>Current</b> <b>weather</b> <b>in</b> San Francisco, CA. Check <b>current</b> conditions in San Francisco, CA with radar, hourly, and more."}]
 * ```
 * </details>
 *
 * <br />
 *
 * <details>
 *
 * <summary><strong>Invocation with tool call</strong></summary>
 *
 * ```typescript
 * // This is usually generated by a model, but we'll create a tool call directly for demo purposes.
 * const modelGeneratedToolCall = {
 *   args: {
 *     input: "what is the current weather in sf?",
 *   },
 *   id: "tool_call_id",
 *   name: tool.name,
 *   type: "tool_call",
 * };
 * await tool.invoke(modelGeneratedToolCall);
 * ```
 *
 * ```text
 * ToolMessage {
 *   "content": "[{\"title\":\"San Francisco, CA Weather Conditions | Weather Underground\",\"link\":\"https://www.wunderground.com/weather/us/ca/san-francisco\",\"snippet\":\"San Francisco <b>Weather</b> Forecasts. <b>Weather</b> Underground provides local & long-range <b>weather</b> forecasts, weatherreports, maps & tropical <b>weather</b> conditions for the San Francisco area.\"}]",
 *   "name": "duckduckgo-search",
 *   "additional_kwargs": {},
 *   "response_metadata": {},
 *   "tool_call_id": "tool_call_id"
 * }
 * ```
 * </details>
 */
export class DuckDuckGoSearch extends Tool {
    constructor(params) {
        super(params ?? {});
        Object.defineProperty(this, "searchOptions", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        Object.defineProperty(this, "maxResults", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: DEFAULT_MAX_RESULTS
        });
        Object.defineProperty(this, "name", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: "duckduckgo-search"
        });
        Object.defineProperty(this, "description", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: "A search engine. Useful for when you need to answer questions about current events. Input should be a search query."
        });
        const { searchOptions, maxResults } = params ?? {};
        this.searchOptions = searchOptions;
        this.maxResults = maxResults || this.maxResults;
    }
    static lc_name() {
        return "DuckDuckGoSearch";
    }
    async _call(input) {
        const { results } = await search(input, this.searchOptions);
        return JSON.stringify(results
            .map((result) => ({
            title: result.title,
            link: result.url,
            snippet: result.description,
        }))
            .slice(0, this.maxResults));
    }
}