# spiders/advanced_factory.py
from typing import Dict, List, Type, Optional
from config.spider_config import SpiderConfig
from core.di.container import container
from spiders.basespider import BaseSpider
from spiders.spider_registry import SPIDER_CLASS_MAP, get_spider_class


class AdvancedSpiderFactory:
    """高级爬虫工厂，支持自动配置映射和依赖注入"""

    @classmethod
    def create_spider(cls, spider_key: str, rule_dict: Dict, user_list: List,
                      env: str = "prod", **kwargs) -> BaseSpider:
        """
        智能创建爬虫实例
        """
        # 1. 获取配置
        config = SpiderConfig.get_platform_config(spider_key)

        # 2. 确定爬虫类
        spider_class = cls._resolve_spider_class(spider_key, config)

        # 3. 准备依赖服务
        dependencies = cls._prepare_dependencies(config, **kwargs)

        # 4. 创建实例
        return spider_class(
            rule_dict=rule_dict,
            user_list=user_list,
            env=env,
            **dependencies
        )

    @classmethod
    def create_spider_by_topic(cls, topic: str, task_id: str, env: str = "prod") -> Optional[BaseSpider]:
        """
        根据MQ topic和任务ID创建爬虫（完整流程）
        """
        # 1. 映射topic到爬虫类型
        spider_key = cls._map_topic_to_spider_key(topic)
        if not spider_key:
            return None

        # 2. 从数据库获取任务配置
        rule_dict, user_list = cls._get_task_config(task_id)
        if not rule_dict:
            return None

        # 3. 创建爬虫实例
        return cls.create_spider(spider_key, rule_dict, user_list, env)

    @classmethod
    def _resolve_spider_class(cls, spider_key: str, config) -> Type[BaseSpider]:
        """解析爬虫类（支持自动发现）"""
        # 优先使用注册表
        if spider_key in SPIDER_CLASS_MAP:
            return SPIDER_CLASS_MAP[spider_key]

        # 根据命名约定自动推断
        if spider_key.endswith('recommend'):
            from spiders.recommendspider import RecommendSpider
            return RecommendSpider
        elif spider_key.endswith('author'):
            from spiders.authorspider import AuthorSpider
            return AuthorSpider

        # 默认使用基类
        return BaseSpider

    @classmethod
    def _prepare_dependencies(cls, config, **kwargs):
        """准备依赖服务"""
        dependencies = {}

        # 数据库服务
        if 'db_service' not in kwargs:
            dependencies['db_service'] = container.db_service(
                platform=config.platform,
                mode=config.mode
            )

        # MQ 生产者
        if 'mq_producer' not in kwargs:
            dependencies['mq_producer'] = container.mq_producer()

        return {**dependencies, **kwargs}

    @classmethod
    def _map_topic_to_spider_key(cls, topic: str) -> Optional[str]:
        """topic到爬虫配置的映射"""
        mapping = {
            "bszf_recommend_prod": "benshanzhufurecommend",
            "ynfqmm_recommend_prod": "yuannifuqimanmanrecommend",
            "xng_author_prod": "xiaoniangaoauthor"
        }
        return mapping.get(topic)

    @classmethod
    def _get_task_config(cls, task_id: str):
        """从数据库获取任务配置"""
        # 这里需要实现数据库查询逻辑
        # 返回 (rule_dict, user_list)
        return {}, []


# 全局工厂实例
spider_factory = AdvancedSpiderFactory()