from typing import Dict,List
from .base_handler import BaseHandler
from .crypto_handler import CryptoHandler
from services.crypto_service import CryptoService

class HandlerRegistry:
    """处理器注册中心"""
    
    def __init__(self):
        self.handlers: Dict[str, BaseHandler] = {}
        self._register_default_handlers()
    
    def _register_default_handlers(self):
        """注册默认处理器"""
        # 注册加密货币处理器
        crypto_service = CryptoService()
        crypto_handler = CryptoHandler(crypto_service)
        self.register_handler(crypto_handler)
    
    def register_handler(self, handler: BaseHandler):
        """注册处理器"""
        self.handlers[handler.get_handler_name()] = handler
    
    def get_handler(self, handler_name: str) -> BaseHandler:
        """获取处理器"""
        return self.handlers.get(handler_name)
    
    def list_handlers(self) -> List[str]:
        """列出所有可用的处理器"""
        return list(self.handlers.keys())