from typing import List, Dict
from src.core.html_processor import HTMLProcessor
from src.api.llm_api import LLMInterface
import logging
from concurrent.futures import ThreadPoolExecutor, as_completed

class DocumentProcessor:
    def __init__(self, llm: LLMInterface):
        self.html_processor = HTMLProcessor()
        self.llm = llm
        # 添加缓存
        self.cache = {}

    def _clean_text(self, text: str) -> str:
        """清理文本内容"""
        import re
        # 移除多余空白
        text = re.sub(r'\s+', ' ', text)
        # 移除特殊字符
        text = re.sub(r'[^\w\s\u4e00-\u9fff。，！？、]', '', text)
        return text.strip()

    def process_documents(self, search_results: List[Dict]) -> List[Dict]:
        processed_docs = []
        batch_size = 5  # 批处理大小
        
        # 并行处理文档
        with ThreadPoolExecutor(max_workers=5) as executor:
            futures = []
            for result in search_results:
                if result['url'] in self.cache:
                    processed_docs.append(self.cache[result['url']])
                    continue
                    
                futures.append(
                    executor.submit(self._process_single_doc, result)
                )
            
            for future in as_completed(futures):
                try:
                    doc = future.result()
                    if doc:
                        self.cache[doc['url']] = doc
                        processed_docs.append(doc)
                except Exception as e:
                    logging.error(f"处理文档失败: {str(e)}")
                    
        return processed_docs[:5]  # 限制返回数量

    def _process_single_doc(self, result: Dict) -> Dict:
        try:
            # 提取HTML内容
            html = self.html_processor.fetch_html(result['url'])
            if not html:
                return None
                    
            # 提取主要内容
            content = self.html_processor.extract_main_content(html)
            content = self._clean_text(content)
            
            if len(content) < 100:  # 内容太短
                return None
                    
            # 生成更有针对性的总结
            summary = self.llm.summarize_document(
                content=content,
                title=result.get('title', ''),
                url=result['url']
            )
            
            if summary:
                return {
                    'passage': summary,
                    'title': result.get('title', ''),
                    'url': result['url']
                }
                
        except Exception as e:
            logging.error(f"处理文档失败 ({result['url']}): {str(e)}")
            return None