package helper

import (
	"encoding/json"
	"fmt"
)

var index = 0
var keys = make([]string, 0)

func getDcValueSingle(source map[string]interface{}) string {
	if index > len(keys)-1 {
		return ""
	}
	if v, ok := source[keys[index]]; ok {
		if vString, ok := v.(string); ok {
			return vString
		} else if vMap, ok := v.(map[string]interface{}); ok {
			index++
			return getDcValueSingle(vMap)
		}
	}
	return ""
}

func GetDcValueByKeys(source string, keysParam ...string) string {
	var des []interface{}
	//fmt.Println("des:", des)
	index = 0
	keys = keysParam
	err := json.Unmarshal([]byte(source), &des)
	if err != nil {
		Fatal(fmt.Errorf("unmarshal wrong"), "__GetDcValueByKey")
	}
	if s, ok := des[0].(map[string]interface{}); ok {
		return getDcValueSingle(s)
	} else {
		Fatal(fmt.Errorf("unmarshal empty"), "__GetDcValueByKey")

	}
	return ""
}