#!/usr/bin/env python3
# 批量数据下载器 - 赵云数据工程工具
# 用于批量下载聚宽文章、金融数据等

import requests
import time
import json
import os
from typing import List, Dict, Optional
import logging
from datetime import datetime

class BatchDownloader:
    """批量数据下载器"""
    
    def __init__(self, output_dir: str = "./data/raw"):
        self.output_dir = output_dir
        self.session = requests.Session()
        self.session.headers.update({
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
        })
        
        # 创建输出目录
        os.makedirs(output_dir, exist_ok=True)
        
        # 配置日志
        logging.basicConfig(
            level=logging.INFO,
            format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
        )
        self.logger = logging.getLogger(__name__)
    
    def download_jq_articles(self, article_links: List[str], delay: float = 1.0) -> Dict:
        """下载聚宽文章
        
        Args:
            article_links: 文章链接列表
            delay: 请求延迟（秒）
            
        Returns:
            Dict: 下载结果统计
        """
        results = {
            'total': len(article_links),
            'success': 0,
            'failed': 0,
            'articles': []
        }
        
        for i, link in enumerate(article_links, 1):
            try:
                self.logger.info(f"下载文章 {i}/{len(article_links)}: {link}")
                
                # 模拟请求
                response = self.session.get(link, timeout=10)
                response.raise_for_status()
                
                # 解析文章内容
                article_data = self._parse_jq_article(response.text)
                
                # 保存文章
                article_id = f"article_{i:03d}"
                save_path = os.path.join(self.output_dir, f"{article_id}.json")
                with open(save_path, 'w', encoding='utf-8') as f:
                    json.dump(article_data, f, ensure_ascii=False, indent=2)
                
                results['success'] += 1
                results['articles'].append({
                    'id': article_id,
                    'url': link,
                    'save_path': save_path,
                    'timestamp': datetime.now().isoformat()
                })
                
                self.logger.info(f"文章 {article_id} 下载成功")
                
            except Exception as e:
                self.logger.error(f"下载失败 {link}: {e}")
                results['failed'] += 1
            
            # 请求延迟
            if i < len(article_links):
                time.sleep(delay)
        
        return results
    
    def _parse_jq_article(self, html_content: str) -> Dict:
        """解析聚宽文章内容
        
        Args:
            html_content: HTML内容
            
        Returns:
            Dict: 解析后的文章数据
        """
        # 这里简化处理，实际需要HTML解析
        return {
            'title': f"聚宽文章 - {datetime.now().strftime('%Y%m%d_%H%M%S')}",
            'content': "文章内容解析逻辑待实现",
            'metadata': {
                'source': 'joinquant',
                'crawl_time': datetime.now().isoformat(),
                'status': 'raw'
            }
        }
    
    def download_financial_data(self, symbols: List[str], start_date: str, end_date: str) -> Dict:
        """下载金融数据
        
        Args:
            symbols: 股票代码列表
            start_date: 开始日期
            end_date: 结束日期
            
        Returns:
            Dict: 下载结果
        """
        results = {}
        
        for symbol in symbols:
            try:
                self.logger.info(f"下载金融数据: {symbol}")
                
                # 这里可以集成akshare、tushare等数据源
                # 示例数据
                data = {
                    'symbol': symbol,
                    'start_date': start_date,
                    'end_date': end_date,
                    'data': []  # 实际数据
                }
                
                # 保存数据
                save_path = os.path.join(self.output_dir, f"financial_{symbol}_{start_date}_{end_date}.json")
                with open(save_path, 'w', encoding='utf-8') as f:
                    json.dump(data, f, ensure_ascii=False, indent=2)
                
                results[symbol] = {
                    'status': 'success',
                    'save_path': save_path
                }
                
            except Exception as e:
                self.logger.error(f"下载金融数据失败 {symbol}: {e}")
                results[symbol] = {
                    'status': 'failed',
                    'error': str(e)
                }
        
        return results
    
    def resume_download(self, log_file: str) -> Dict:
        """断点续传
        
        Args:
            log_file: 下载日志文件
            
        Returns:
            Dict: 续传结果
        """
        self.logger.info(f"尝试断点续传: {log_file}")
        
        try:
            with open(log_file, 'r', encoding='utf-8') as f:
                log_data = json.load(f)
            
            # 找出失败的下载项
            failed_items = [item for item in log_data.get('items', []) 
                           if item.get('status') == 'failed']
            
            if not failed_items:
                self.logger.info("没有失败的下载项")
                return {'status': 'completed', 'failed': 0}
            
            self.logger.info(f"发现 {len(failed_items)} 个失败的下载项，尝试重新下载")
            
            # 重新下载失败的项
            success_count = 0
            for item in failed_items:
                try:
                    # 重新下载逻辑
                    # ...
                    success_count += 1
                except Exception as e:
                    self.logger.error(f"重新下载失败: {e}")
            
            return {
                'status': f'resumed {success_count}/{len(failed_items)}',
                'total_failed': len(failed_items),
                'resumed': success_count,
                'still_failed': len(failed_items) - success_count
            }
            
        except Exception as e:
            self.logger.error(f"断点续传失败: {e}")
            return {'status': 'failed', 'error': str(e)}

def main():
    """示例使用"""
    downloader = BatchDownloader()
    
    # 示例：下载聚宽文章
    article_links = [
        "https://www.joinquant.com/view/community/detail/12345",
        "https://www.joinquant.com/view/community/detail/67890"
    ]
    
    results = downloader.download_jq_articles(article_links)
    print(f"下载结果: {json.dumps(results, ensure_ascii=False, indent=2)}")
    
    # 示例：下载金融数据
    stock_symbols = ['000001', '000002']
    financial_results = downloader.download_financial_data(
        stock_symbols, '2024-01-01', '2024-03-01'
    )
    print(f"金融数据下载结果: {json.dumps(financial_results, ensure_ascii=False, indent=2)}")

if __name__ == "__main__":
    main()