@copilotkit/runtime/dist/service-adapters/langchain/langserve.cjs

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require("reflect-metadata");

//#region src/service-adapters/langchain/langserve.ts
var RemoteChain = class {
	constructor(options) {
		this.name = options.name;
		this.description = options.description;
		this.chainUrl = options.chainUrl;
		this.parameters = options.parameters;
		this.parameterType = options.parameterType || "multi";
	}
	async toAction() {
		if (!this.parameters) await this.inferLangServeParameters();
		return {
			name: this.name,
			description: this.description,
			parameters: this.parameters,
			handler: async (args) => {
				const { RemoteRunnable } = require("langchain/runnables/remote");
				const runnable = new RemoteRunnable({ url: this.chainUrl });
				let input;
				if (this.parameterType === "single") input = args[Object.keys(args)[0]];
				else input = args;
				return await runnable.invoke(input);
			}
		};
	}
	async inferLangServeParameters() {
		const supportedTypes = [
			"string",
			"number",
			"boolean"
		];
		let schemaUrl = this.chainUrl.replace(/\/+$/, "") + "/input_schema";
		let schema = await fetch(schemaUrl).then((res) => res.json()).catch(() => {
			throw new Error("Failed to fetch langserve schema at " + schemaUrl);
		});
		if (supportedTypes.includes(schema.type)) {
			this.parameterType = "single";
			this.parameters = [{
				name: "input",
				type: schema.type,
				description: "The input to the chain"
			}];
		} else if (schema.type === "object") {
			this.parameterType = "multi";
			this.parameters = Object.keys(schema.properties).map((key) => {
				let property = schema.properties[key];
				if (!supportedTypes.includes(property.type)) throw new Error("Unsupported schema type");
				return {
					name: key,
					type: property.type,
					description: property.description || "",
					required: schema.required?.includes(key) || false
				};
			});
		} else throw new Error("Unsupported schema type");
	}
};

//#endregion
exports.RemoteChain = RemoteChain;
//# sourceMappingURL=langserve.cjs.map