"""
命令行接口
提供统一的爬虫启动入口
"""

import argparse
import sys
from typing import List

import os
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from config.settings import config
from utils.logger import get_logger, Logger
from database.repository import NewsRepository
from database.models import NewsModel


# 爬虫类映射
CRAWLER_CLASSES = {
    'netease': {
        'entertainment': ('crawlers.netease.entertainment', 'EntertainmentCrawler'),
        'tech': ('crawlers.netease.tech', 'TechCrawler'),
        'sports': ('crawlers.netease.sports', 'SportsCrawler'),
        'money': ('crawlers.netease.money', 'MoneyCrawler'),
        'auto': ('crawlers.netease.auto', 'AutoCrawler'),
        'gov': ('crawlers.netease.gov', 'GovCrawler'),
        'health': ('crawlers.netease.health', 'HealthCrawler'),
        'war': ('crawlers.netease.war', 'WarCrawler'),
    },
    'kr36': {
        'ai': ('crawlers.kr36.ai', 'AICrawler'),
        'health': ('crawlers.kr36.health', 'HealthCrawler'),
    },
    'sina': {
        'auto': ('crawlers.sina.auto', 'SinaAutoCrawler'),
        'gov': ('crawlers.sina.gov', 'SinaGovCrawler'),
    },
    'tencent': {
        'auto': ('crawlers.tencent.auto', 'AutoCrawler'),
        'war': ('crawlers.tencent.war', 'WarCrawler'),
        'war_web': ('crawlers.tencent.war_web', 'WarWebCrawler'),
    },
}


def init_logging():
    """初始化日志系统"""
    Logger.get_logger("news-crawler")


def list_crawlers() -> List[str]:
    """列出所有可用的爬虫"""
    crawlers = []

    # 网易爬虫
    netease_categories = config.get('sources.netease.categories', {})
    for category in netease_categories.keys():
        crawlers.append(f"netease:{category}")

    # 36氪爬虫
    kr36_categories = config.get('sources.kr36.categories', {})
    for category in kr36_categories.keys():
        crawlers.append(f"kr36:{category}")

    # 新浪爬虫
    sina_categories = config.get('sources.sina.categories', {})
    for category in sina_categories.keys():
        crawlers.append(f"sina:{category}")

    # 腾讯爬虫
    tencent_categories = config.get('sources.tencent.categories', {})
    for category in tencent_categories.keys():
        crawlers.append(f"tencent:{category}")

    return crawlers


def get_crawler_class(source: str, category: str):
    """
    动态导入爬虫类

    Args:
        source: 新闻源
        category: 分类

    Returns:
        爬虫类
    """
    if source not in CRAWLER_CLASSES:
        raise ValueError(f"不支持的数据源: {source}")

    if category not in CRAWLER_CLASSES[source]:
        raise ValueError(f"不支持的分类: {source}:{category}")

    module_name, class_name = CRAWLER_CLASSES[source][category]

    # 动态导入模块
    import importlib
    module = importlib.import_module(f"src.{module_name}")
    return getattr(module, class_name)


def run_crawler(source: str, category: str, max_articles: int = None) -> bool:
    """
    运行指定爬虫

    Args:
        source: 新闻源
        category: 分类
        max_articles: 最大文章数

    Returns:
        是否成功
    """
    logger = get_logger(__name__)

    try:
        # 动态导入爬虫类
        crawler_class = get_crawler_class(source, category)

        # 创建并运行爬虫
        crawler = crawler_class(source, category)
        print("创建并运行爬虫")
        # 覆盖最大文章数
        if max_articles:
            crawler.max_articles = max_articles
            

        articles = crawler.crawl()

        if not articles:
            logger.warning(f"未爬取到任何文章")
            return False

        # 转换为数据模型
        news_list = [
            NewsModel(
                url=article.url,
                title=article.title or "",
                content=article.content,
                category_id=article.category_id,
                source=article.source,
                publish_time=article.publish_time,
                author=article.author,
            )
            for article in articles
            if article.is_valid()
        ]

        # 保存到数据库
        repository = NewsRepository()
        count = repository.save_news(news_list)

        logger.info(f"任务完成，保存了 {count} 条新闻")
        return count > 0

    except Exception as e:
        logger.error(f"运行爬虫失败: {e}", exc_info=True)
        return False


def main():
    """主函数"""
    parser = argparse.ArgumentParser(
        description="新闻爬虫系统",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
示例:
  %(prog)s --list                    # 列出所有可用爬虫
  %(prog)s netease:tech             # 爬取网易科技新闻
  %(prog)s kr36:ai                  # 爬取36氪AI新闻
  %(prog)s netease:tech --max 5     # 爬取5篇网易科技新闻
  %(prog)s --all                    # 运行所有爬虫
        """
    )

    parser.add_argument(
        'crawler',
        nargs='?',
        help='爬虫名称 (格式: source:category)'
    )

    parser.add_argument(
        '--list',
        action='store_true',
        help='列出所有可用爬虫'
    )

    parser.add_argument(
        '--all',
        action='store_true',
        help='运行所有爬虫'
    )

    parser.add_argument(
        '--max',
        type=int,
        help='最大爬取文章数'
    )

    parser.add_argument(
        '--debug',
        action='store_true',
        help='开启调试模式'
    )

    args = parser.parse_args()

    # 初始化日志
    init_logging()
    logger = get_logger(__name__)

    # 处理--list参数
    if args.list:
        print("可用的爬虫:")
        for crawler in list_crawlers():
            print(f"  - {crawler}")
        return 0

    # 处理--all参数
    if args.all:
        logger.info("运行所有爬虫...")
        crawlers = list_crawlers()
        success_count = 0

        for crawler_name in crawlers:
            source, category = crawler_name.split(':')
            logger.info(f"正在运行 {crawler_name}...")
            if run_crawler(source, category, args.max):
                success_count += 1

        logger.info(f"完成: {success_count}/{len(crawlers)} 个爬虫成功")
        return 0 if success_count == len(crawlers) else 1

    # 处理单个爬虫
    if not args.crawler:
        parser.print_help()
        return 1

    try:
        source, category = args.crawler.split(':')
    except ValueError:
        logger.error(f"爬虫名称格式错误，应为 'source:category'")
        return 1

    if run_crawler(source, category, args.max):
        return 0
    else:
        return 1


if __name__ == "__main__":
    sys.exit(main())