import { BaseChain } from "./base.js";
import { loadFromHub } from "../util/hub.js";
import { loadFromFile } from "../util/load.js";
import { parseFileConfig } from "../util/parse.js";
const loadChainFromFile = async (file, path, values = {}) => {
    const serialized = parseFileConfig(file, path);
    return BaseChain.deserialize(serialized, values);
};
/**
 * Load a chain from {@link https://github.com/hwchase17/langchain-hub | LangchainHub} or local filesystem.
 *
 * @example
 * Loading from LangchainHub:
 * ```ts
 * import { loadChain } from "langchain/chains/load";
 * const chain = await loadChain("lc://chains/hello-world/chain.json");
 * const res = await chain.call({ topic: "my favorite color" });
 * ```
 *
 * @example
 * Loading from local filesystem:
 * ```ts
 * import { loadChain } from "langchain/chains/load";
 * const chain = await loadChain("/path/to/chain.json");
 * ```
 *
 * @deprecated Use newer {@link https://api.js.langchain.com/functions/langchain.load.load.html | load method}.
 */
export const loadChain = async (uri, values = {}) => {
    const hubResult = await loadFromHub(uri, loadChainFromFile, "chains", new Set(["json", "yaml"]), values);
    if (hubResult) {
        return hubResult;
    }
    return loadFromFile(uri, loadChainFromFile, values);
};