package com.gzzn.omms.msgexchangeapi.msghandler;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.gzzn.omms.msgexchangeapi.entity.msg.Msg;
import com.gzzn.omms.msgexchangeapi.service.IExchangeService;
import com.gzzn.omms.msgexchangeapi.utils.JsonUtil;

@Service
public class MsgHandlerDispatcher {
	private Logger logger = LoggerFactory.getLogger(MsgHandlerDispatcher.class);
	
	@Autowired
	IExchangeService exchangeService;
	
    public HandlerResult dispatch(String xmlMsg)
    {
		Msg msg = exchangeService.xmlstrToObject(xmlMsg, Msg.class);
   	    String type = msg.getMeta().getType();
   	    String subType = msg.getMeta().getStyp();
   	    
   	    try 
   	    {
   	    	Class  clazzHandler =  Class.forName(getHandlerClassName(type,subType));
   	    	Object classObject = clazzHandler.newInstance();
   	    	Method runMethod = clazzHandler.getMethod("run", String.class);
   	    	HandlerResult result = (HandlerResult) runMethod.invoke(classObject, xmlMsg);
			return result;
		} catch (ClassNotFoundException
				| InstantiationException
				| IllegalAccessException 
				| NoSuchMethodException 
				| SecurityException 
				| IllegalArgumentException
				| InvocationTargetException e) {
			//throw new RuntimeException(e);
			logger.error("消息处理失败:{}",e.getMessage());
			return HandlerResult.failure();
		}
    }//end function
    
    /**
     * 获取handler 类的名称
     * @param type
     * @param subType
     * @return
     */
    private String getHandlerClassName(String type , String subType)
    {
    	StringBuffer buffer = new StringBuffer();
    	buffer.append("com.gzzn.omms.msgexchangeapi.msghandler" );
    	buffer.append(".");
    	buffer.append(type.toLowerCase());
    	buffer.append(".");
    	buffer.append(subType);
    	buffer.append("Handler");
    	
    	
    	return buffer.toString();
    } //end function
    
}