# import asyncio
# import json
# from datetime import datetime
# from typing import List, Set, Optional
# from langchain_core.tools import tool
# from tavily import TavilyClient
#
# from src.core.config import settings
#
# # 模拟配置加载
# TAVILY_API_KEY = settings.TAVILY_API_KEY
#
#
# @tool
# async def topic_research(topic: list[str], max_urls: int = 5) -> str:
#     """
#     深度调研工具。该工具会利用 Tavily 搜索引擎针对特定主题进行多维度搜索。
#     它会自动生成针对性的搜索词（包含年份和趋势），并返回去重后的高质量 URL 列表。
#     """
#     if not TAVILY_API_KEY:
#         return "❌ 错误: 未配置 TAVILY_API_KEY。"
#
#     client = TavilyClient(api_key=TAVILY_API_KEY)
#
#     # 1. 自动生成多维度搜索词 (在工具内部快速生成)
#
#     # 2. 并行执行搜索
#     async def perform_search(q: str):
#         # 使用 asyncio.to_thread 运行同步的 Tavily SDK
#         def sync_search():
#             try:
#                 response = client.search(
#                     query=q,
#                     search_depth="advanced",
#                     max_results=5,
#                     include_answer=False
#                 )
#                 return response.get('results', [])
#             except Exception as e:
#                 print(f"Search error: {e}")
#                 return []
#
#         return await asyncio.to_thread(sync_search)
#
#     search_tasks = [perform_search(q) for q in topic]
#     search_results_list = await asyncio.gather(*search_tasks)
#
#     # 3. 结果去重与过滤
#     seen_urls: Set[str] = set()
#     final_urls = []
#
#     # 常见的非内容页面过滤
#     skip_extensions = ('.pdf', '.jpg', '.png', '.zip', '.exe')
#
#     for results in search_results_list:
#         for item in results:
#             url = item.get('url')
#             if url and url not in seen_urls:
#                 if not url.lower().endswith(skip_extensions):
#                     seen_urls.add(url)
#                     final_urls.append(url)
#
#     # 4. 结果截断
#     selected_urls = final_urls[:max_urls]
#
#     # 返回 JSON 字符串，便于 Agent 下一步调用批量爬虫 (Crawl4ai)
#     return json.dumps(selected_urls, ensure_ascii=False)
#


import asyncio
import json
from typing import List, Set

from ddgs import DDGS
from langchain.tools import tool
from pydantic import BaseModel, Field


class TopicResearchInput(BaseModel):
    """Input for topic research tool."""
    topic: List[str] = Field(description="List of separate research keyword strings. Example: ['modern sofa design', 'sustainable wood furniture']")
    max_urls: int = Field(default=5, description="Maximum number of URLs to return")


@tool(args_schema=TopicResearchInput)
async def topic_research(topic: List[str], max_urls: int = 5) -> str:
    """
    In-depth research tool (DuckDuckGo version).
    Search based on multiple topic keywords and return a high-quality URL list (JSON string) after deduplication.
    """

    # DuckDuckGo 是同步库，需要丢到线程池
    def sync_search(query: str):
        try:
            with DDGS() as ddgs:
                results = ddgs.text(
                    query,
                    max_results=8  # 稍微多一点，后面会过滤
                )
                return [r.get("href") for r in results if r.get("href")]
        except Exception as e:
            print(f"Search error: {e}")
            return []

    async def perform_search(q: str):
        return await asyncio.to_thread(sync_search, q)

    # 并发执行多个 query
    search_tasks = [perform_search(q) for q in topic]
    search_results_list = await asyncio.gather(*search_tasks)

    # ========================
    # 去重 + 过滤
    # ========================
    seen_urls: Set[str] = set()
    final_urls = []

    skip_extensions = ('.pdf', '.jpg', '.png', '.zip', '.exe')

    for results in search_results_list:
        for url in results:
            if not url:
                continue

            if url not in seen_urls and not url.lower().endswith(skip_extensions):
                seen_urls.add(url)
                final_urls.append(url)

    # ========================
    # 截断结果
    # ========================
    selected_urls = final_urls[:max_urls]
    print(f" topic research !!!!!!!!!!!!!!!!!!!!! {selected_urls}")
    return json.dumps(selected_urls, ensure_ascii=False)

# import asyncio
#
#
# # 假设你已经定义了 topic_research
#
# async def test():
#     topics = [
#         "modern furniture design trends 2025",
#         "scandinavian furniture materials",
#         "minimalist living room furniture ideas"
#     ]
#
#     result = await topic_research.ainvoke({
#         "topic": topics,
#         "max_urls": 5
#     })
#
#     print("结果👇")
#     print(result)
#
#
# asyncio.run(test())