// Package transform ...
//
// Description : transform ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2021-11-30 4:04 下午
package transform

import (
	"encoding/json"
	"errors"
	"fmt"
	"io/ioutil"
	"net/http"

	"github.com/ddliu/go-httpclient"
)

// NewApolloMigrate 从apollo迁移数据
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 4:06 下午 2021/11/30
func NewApolloMigrate(getAllApolloConfigURL string, appID string, env string, namespace string, cookie map[string]string, header map[string]string) ITransform {
	if cookie == nil {
		cookie = make(map[string]string)
		header = make(map[string]string)
	}
	return &ApolloMigrate{
		getDataURL: getAllApolloConfigURL,
		cookie:     cookie,
		header:     header,
		appID:      appID,
	}
}

// ApolloMigrate 从apollo迁移数据
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 4:05 下午 2021/11/30
type ApolloMigrate struct {
	getDataURL string
	cookie     map[string]string
	header     map[string]string
	appID      string
}

// GetNamespace 迁移之后，存储到哪一个命名空间
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 4:17 下午 2021/11/30
func (a *ApolloMigrate) GetNamespace() string {
	return a.appID
}

// GetSourceData ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 4:18 下午 2021/11/30
func (a *ApolloMigrate) GetSourceData() (map[string]string, error) {
	var (
		err          error
		resp         *httpclient.Response
		responseData []byte
	)
	hc := httpclient.NewHttpClient()
	cookieList := make([]*http.Cookie, 0)
	for name, val := range a.cookie {
		cookieList = append(cookieList, &http.Cookie{Name: name, Value: val})
	}
	resp, err = hc.WithHeaders(a.header).WithCookie(cookieList...).Get(a.getDataURL)
	if nil != err {
		return make(map[string]string), errors.New("apollo接口请求失败 : " + err.Error())
	}
	responseData, err = ioutil.ReadAll(resp.Body)
	if nil != err {
		return make(map[string]string), errors.New("apollo 响应数据读取失败 : " + err.Error())
	}
	var cfgList []ApolloData
	if err = json.Unmarshal(responseData, &cfgList); nil != err {
		return make(map[string]string), errors.New("apollo 数据解析失败 : " + err.Error())
	}
	if len(cfgList) == 0 {
		return make(map[string]string), errors.New("当前apollo配置读取到的数据为空")
	}
	var realCfg map[string]string
	if err = json.Unmarshal([]byte(cfgList[0].Configurations), &realCfg); nil != err {
		return make(map[string]string), errors.New("真实配置文件解析失败 ")
	}
	return realCfg, nil
}

// MigrateKeyFailCallback ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 4:58 下午 2021/11/30
func (a *ApolloMigrate) MigrateKeyFailCallback(namespace string, key string, val string, err error) {
	fmt.Println(namespace, key, val, err)
}