package com.gkhy.safePlatform.service.impl;

import com.alibaba.nacos.api.annotation.NacosInjected;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.NamingService;
import com.alibaba.nacos.api.naming.pojo.Instance;
import com.gkhy.safePlatform.commons.enums.ResultCodes;
import com.gkhy.safePlatform.commons.vo.ResultVO;
import com.gkhy.safePlatform.config.serverNode.ServerNodeEntry;
import com.gkhy.safePlatform.config.serverNode.WebSocketNodesMap;
import com.gkhy.safePlatform.model.dto.ServerNode;
import com.gkhy.safePlatform.service.WebsocketServerNamingService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.List;

@Service
public class WebsocketServerNamingServiceImpl implements WebsocketServerNamingService {

    @Resource
    private WebSocketNodesMap webSocketNodesMap;

    @NacosInjected
    private NamingService namingService;

    @Override
    public ResultVO<ServerNode> getOneHealthyInstance(String serverName) throws NacosException {
        ResultVO<ServerNode> resultVO = new ResultVO<>();
        resultVO.setCode(ResultCodes.OK.getCode());
        Instance instance = namingService.selectOneHealthyInstance(serverName);
        if(instance != null){
            ServerNode node = transferToExtranetNode(instance);
            if(node != null){
                node.setServerName(serverName);
                resultVO.setCount(1);
                resultVO.setData(node);
            }
        }
        return resultVO;
    }

    @Override
    public ResultVO<List<ServerNode>> listHealthyInstance(String serverName) throws NacosException {
        ResultVO<List<ServerNode>> resultVO = new ResultVO<>();
        resultVO.setCode(ResultCodes.OK.getCode());
        List<Instance> instanceList = namingService.getAllInstances(serverName);
        if(instanceList != null && instanceList.size() > 0){
            List<ServerNode> nodeList = new ArrayList<>();
            for(Instance instance : instanceList){
                ServerNode node = transferToExtranetNode(instance);
                if(node != null){
                    node.setServerName(serverName);
                    nodeList.add(node);
                }
            }
            resultVO.setData(nodeList);
            resultVO.setCount(nodeList.size());
        }
        return resultVO;
    }

    /**
     * 将内网实例转换为外网可访问的节点
     * @param instance
     * @return
     */
    private ServerNode transferToExtranetNode(Instance instance){
        ServerNode node = null;
        if(instance == null || instance.getIp() == null || instance.getIp().isEmpty())
            return null;
        String ipStr = instance.getIp();
        if(webSocketNodesMap.getNodes().containsKey(ipStr)){
            ServerNodeEntry entry = webSocketNodesMap.getNodes().get(ipStr);
            if(entry != null){
                node = new ServerNode();
                node.setIp(entry.getOutIp());
                node.setPort(entry.getOutPort());
            }
        }
        return node;
    }
}