import { BaseSubagent, type SubagentConfig } from '../base-subagent.js';
import type { BaseChatModel } from '@langchain/core/language_models/chat_models';
import type { FastifyBaseLogger } from 'fastify';

/**
 * Web Explore Subagent
 *
 * Accepts a research instruction, searches the web (DuckDuckGo) or arXiv
 * for academic queries, fetches relevant page/PDF content, and returns a
 * markdown summary with cited sources.
 *
 * No MCP client needed — operates entirely through platform tools.
 */
export class WebExploreSubagent extends BaseSubagent {
  constructor(
    config: SubagentConfig,
    model: BaseChatModel,
    logger: FastifyBaseLogger,
    tools?: any[]
  ) {
    super(config, model, logger, undefined, tools);
  }

  protected getRecursionLimit() { return 15; }
  protected getFallbackText() { return 'No results found.'; }
  protected requiresMCPClient() { return false; }
}

/**
 * Factory function to create and initialize WebExploreSubagent
 */
export async function createWebExploreSubagent(
  model: BaseChatModel,
  logger: FastifyBaseLogger,
  basePath: string,
  tools?: any[]
): Promise<WebExploreSubagent> {
  const config = await BaseSubagent.loadConfig(basePath);
  const subagent = new WebExploreSubagent(config, model, logger, tools);
  await subagent.initialize(basePath);
  return subagent;
}