package register

import (
	"bytes"
	"fmt"
	"github.com/nacos-group/nacos-sdk-go/v2/clients"
	"github.com/nacos-group/nacos-sdk-go/v2/clients/config_client"
	"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
	"github.com/nacos-group/nacos-sdk-go/v2/vo"
	"github.com/spf13/viper"
	"go.uber.org/zap"
	"strconv"
	"strings"
)

var group = ""

func InitNacos(configFileName string) *viper.Viper {

	v := parseAgentConfigFile(configFileName, nil)
	group = v.GetString("spring.cloud.nacos.config.group")

	// build the nacos connection
	configClient := startNacosConnection(v)

	// get all needed nacos config and merge
	allNacosConfig := getAllNacosConfig(v, group, configClient)

	for _, nacosConfigContent := range allNacosConfig {
		log.Debug(fmt.Sprintf("nacos config conetent is %s", nacosConfigContent))

		parseNacosConfigContend(nacosConfigContent, v)
	}

	log.Info(fmt.Sprintf("%s config read result are %v", configFileName, v.AllSettings()))

	return v
}

func parseAgentConfigFile(configFileName string, v *viper.Viper) *viper.Viper {

	// 使用Viper框架读取
	if v == nil {
		v = viper.New()
	}

	// 设置配置文件路径和名称
	v.SetConfigName(configFileName)
	v.AddConfigPath(".")
	v.SetConfigType("yaml")

	// 读取默认的总配置文件
	err := v.ReadInConfig()
	if err != nil {
		panic(fmt.Errorf("fatal error config file: %s", err))
	}

	return v
}

func parseNacosConfigContend(configContent string, v *viper.Viper) *viper.Viper {

	v.SetConfigType("yaml")

	// use merge

	err := v.MergeConfig(bytes.NewBuffer([]byte(configContent)))
	if err != nil {
		log.Error("nacos config contend read error !", zap.Error(err))
	}

	return v
}
func startNacosConnection(v *viper.Viper) config_client.IConfigClient {

	serverAddr := v.GetString("spring.cloud.nacos.config.server-addr")

	clientConfig := constant.ClientConfig{
		//Endpoint: serverAddr,
		NamespaceId:          "",
		TimeoutMs:            v.GetUint64("spring.cloud.nacos.config.timeout"),
		NotLoadCacheAtStart:  true,
		AppendToStdout:       true,
		UpdateCacheWhenEmpty: true,
		//LogDir:              "/tmp/nacos/log",
		//CacheDir:            "/tmp/nacos/cache",
		Username: "nacos",
		Password: "Superwmm.23",
	}

	split := strings.Split(serverAddr, ":")
	if len(split) != 2 {
		log.Error("nacos server addr error!")
	}

	port, _ := strconv.ParseUint(split[1], 10, 64)
	serverConfigs := []constant.ServerConfig{
		{
			IpAddr:   split[0],
			Port:     port,
			GrpcPort: port + 1000,
		},
	}

	// Another way of create config client for dynamic configuration (recommend)
	configClient, err := clients.NewConfigClient(
		vo.NacosClientParam{
			ClientConfig:  &clientConfig,
			ServerConfigs: serverConfigs,
		},
	)
	if err != nil {
		panic(err)
	}

	return configClient
}

func getAllNacosConfig(v *viper.Viper, group string, configClient config_client.IConfigClient) []string {

	result := make([]string, 0)

	// main nacos configs
	mainNacosConfigFileName := v.GetString("spring.application.name") + "-" + v.GetString("spring.profiles.active") + "." + v.GetString("spring.cloud.nacos.config.file-extension")

	log.Debug(fmt.Sprintf("main nacos config file name is %s", mainNacosConfigFileName))
	configContent := getConfig(mainNacosConfigFileName, group, configClient)
	result = append(result, configContent)

	// additional nacos config
	additionalNacosConfig := v.Get("spring.cloud.nacos.config.extension-configs")
	// 增加断言，判定map的类型
	m, ok := additionalNacosConfig.([]interface{})
	if !ok {
		fmt.Println("additionalNacosConfig is not a slice")
		return nil
	}

	for _, addConfigMap := range m {

		realMap, _ := addConfigMap.(map[string]interface{})

		// 拿到配置的Key
		dataId := realMap["data-id"].(string)
		group := realMap["group"].(string)

		// 查询
		config := getConfig(dataId, group, configClient)
		result = append(result, config)
	}

	return result
}

// getConfig 从Nacos中获取相应的
func getConfig(dataId string, group string, configClient config_client.IConfigClient) string {

	log.Debug(fmt.Sprintf("nacos config get method dataID is %s, group is %s", dataId, group))

	content, err := configClient.GetConfig(vo.ConfigParam{
		DataId: dataId,
		Group:  group,
	})
	if err != nil {
		log.Error("nacos config get error !", zap.Error(err))
	}

	log.Debug(fmt.Sprintf("dataId %s , group %s, nacos config content is %s", dataId, group, content))

	return content
}