// Package etcd ...
//
// Description : etcd ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2021-11-23 10:53 上午
package etcd

import (
	"github.com/pkg/errors"
	"go.etcd.io/etcd/clientv3"
)

var (
	// Client 客户端
	Client *clientv3.Client
)

// InitEtcdClient 初始化etcd连接
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 10:53 上午 2021/11/23
func InitEtcdClient(cfg clientv3.Config) error {
	if nil == cfg.Endpoints || len(cfg.Endpoints) == 0 {
		return errors.New("endpoints is empty")
	}

	// 连接超时
	if cfg.DialTimeout == 0 {
		cfg.DialTimeout = DefaultDialTimeout
	}

	// ping 时间间隔
	if cfg.DialKeepAliveTime == 0 {
		cfg.DialKeepAliveTime = DefaultDialKeepAliveTime
	}

	// ping 响应超时时间
	if cfg.DialKeepAliveTimeout == 0 {
		cfg.DialKeepAliveTimeout = DefaultDialKeepAliveTimeout
	}

	// 客户端发送的最大请求体大小
	if cfg.MaxCallSendMsgSize <= 0 {
		cfg.MaxCallSendMsgSize = DefaultMaxCallSendMsgSize
	}

	// 客户端接受的最大响应体大小
	if cfg.MaxCallRecvMsgSize <= 0 {
		cfg.MaxCallRecvMsgSize = DefaultMaxCallRecvMsgSize
	}
	var err error
	if Client, err = clientv3.New(cfg); nil != err {
		return errors.New("etcd连接失败 : " + err.Error())
	}
	return nil
}