package cn.hhj.handler;

import cn.hhj.request.RpcRequest;
import org.springframework.util.StringUtils;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.Method;
import java.net.Socket;
import java.util.Map;

public class ProcessorHandler implements Runnable {
    private Socket socket;
    private Map<String,Object> handlerMap;

    public ProcessorHandler(Socket socket, Map<String,Object> handlerMap) {
        this.socket = socket;
        this.handlerMap =handlerMap;
    }
    @Override
    public void run() {
        ObjectInputStream is=null;
        ObjectOutputStream os=null;
        try{
            is=new ObjectInputStream(socket.getInputStream());
            RpcRequest request= (RpcRequest) is.readObject();
            Object result=invoke(request); //反射调用本地服务
            os=new ObjectOutputStream(socket.getOutputStream());
            os.writeObject(result);
            os.flush();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            try { if (is!=null){ is.close(); } } catch (IOException e) { e.printStackTrace(); }
            try { if (os!=null){ os.close(); } } catch (IOException e) { e.printStackTrace(); }
        }
    }

    private Object invoke(RpcRequest request)throws  Exception{
        String serviceName=request.getClassName();
        String version=request.getVersion();
        if (!StringUtils.isEmpty(version)){
            serviceName+="-"+version;
        }
        Object service= handlerMap.get(serviceName);
        if (service==null){
            throw new RuntimeException("service not found"+serviceName);
        }
        Object[] params=request.getParameters(); // 参数列表
        Method method=null;
        Class clazz=Class.forName(request.getClassName());
        if(params!=null) {
            Class<?>[] types = new Class[params.length]; // 获得每个参数的类型
            for (int i = 0; i < params.length; i++) {
                types[i] = params[i].getClass();
            }
            method=clazz.getMethod(request.getMethodName(),types);
        }else{
            method=clazz.getMethod(request.getMethodName());
        }
        return method.invoke(service,params);
    }
}