/*
 * Copyright 1999-2020 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package util

import (
	"encoding/json"
	"net"
	"net/http"
	"net/url"
	"strconv"
	"time"

	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
	"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
	"github.com/nacos-group/nacos-sdk-go/v2/model"
)

func CurrentMillis() int64 {
	return time.Now().UnixNano() / 1e6
}

func JsonToService(result string) *model.Service {
	var service model.Service
	err := json.Unmarshal([]byte(result), &service)
	if err != nil {
		logger.Errorf("failed to unmarshal json string:%s err:%+v", result, err)
		return nil
	}
	if len(service.Hosts) == 0 {
		logger.Warnf("instance list is empty,json string:%s", result)
	}
	return &service

}
func ToJsonString(object interface{}) string {
	js, _ := json.Marshal(object)
	return string(js)
}

func GetGroupName(serviceName string, groupName string) string {
	return groupName + constant.SERVICE_INFO_SPLITER + serviceName
}

func GetServiceCacheKey(serviceName string, clusters string) string {
	if clusters == "" {
		return serviceName
	}
	return serviceName + constant.SERVICE_INFO_SPLITER + clusters
}

func GetConfigCacheKey(dataId string, group string, tenant string) string {
	return dataId + constant.CONFIG_INFO_SPLITER + group + constant.CONFIG_INFO_SPLITER + tenant
}

var localIP = ""

func LocalIP() string {
	if localIP == "" {
		netInterfaces, err := net.Interfaces()
		if err != nil {
			logger.Errorf("get Interfaces failed,err:%+v", err)
			return ""
		}

		for i := 0; i < len(netInterfaces); i++ {
			if ((netInterfaces[i].Flags & net.FlagUp) != 0) && ((netInterfaces[i].Flags & net.FlagLoopback) == 0) {
				addrs, err := netInterfaces[i].Addrs()
				if err != nil {
					logger.Errorf("get InterfaceAddress failed,err:%+v", err)
					return ""
				}
				for _, address := range addrs {
					if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() && ipnet.IP.To4() != nil {
						localIP = ipnet.IP.String()
						break
					}
				}
			}
		}

		if len(localIP) > 0 {
			logger.Infof("Local IP:%s", localIP)
		}
	}
	return localIP
}

func GetDurationWithDefault(metadata map[string]string, key string, defaultDuration time.Duration) time.Duration {
	data, ok := metadata[key]
	if ok {
		value, err := strconv.ParseInt(data, 10, 64)
		if err != nil {
			logger.Errorf("key:%s is not a number", key)
			return defaultDuration
		}
		return time.Duration(value)
	}
	return defaultDuration
}

func GetUrlFormedMap(source map[string]string) (urlEncoded string) {
	urlEncoder := url.Values{}
	for key, value := range source {
		urlEncoder.Add(key, value)
	}
	urlEncoded = urlEncoder.Encode()
	return
}

// get status code by response,default is NA
func GetStatusCode(response *http.Response) string {
	var statusCode string
	if response != nil {
		statusCode = strconv.Itoa(response.StatusCode)
	} else {
		statusCode = "NA"
	}
	return statusCode
}

func DeepCopyMap(params map[string]string) map[string]string {
	result := make(map[string]string, len(params))
	for k, v := range params {
		result[k] = v
	}
	return result
}