package cn.hhj.proxy.remote;

import cn.hhj.disovery.IServiceDiscovery;
import cn.hhj.request.RpcRequest;
import cn.hhj.rpcsend.RpcNetTransport;
import org.springframework.util.StringUtils;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.List;

public class RemoteInvocationHandler implements InvocationHandler {

    private IServiceDiscovery serviceDiscovery;
    private String version;

    public RemoteInvocationHandler(IServiceDiscovery serviceDiscovery, String version) {
        this.serviceDiscovery = serviceDiscovery;
        this.version = version;
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        // 进行请求数据的包装
        RpcRequest request=new RpcRequest();
        request.setClassName(method.getDeclaringClass().getName());
        request.setMethodName(method.getName());
        request.setParamTypes(method.getParameterTypes());
        request.setParameters(args);
        request.setVersion(version);
        String serviceName=request.getClassName();
        if(!StringUtils.isEmpty(version)){
            serviceName=serviceName+"-"+version;
        }
        List<String> serviceAddress=serviceDiscovery.discovery(serviceName);
        RpcNetTransport rnt=new RpcNetTransport(serviceAddress);
        Object result=rnt.send(request);
        System.err.println("【client】：远程通信,需要调用的接口是："+serviceName);
        return result;
    }
}