package utils
  
  import (

  	"crypto/md5"
  	"encoding/hex"

  	"reflect"
  	"strings"
  )
  

  func GetSchemaType(schema interface{}) reflect.Type  {

  	s := reflect.TypeOf(schema)
  	if s.Kind() == reflect.Ptr {
  		s = reflect.TypeOf(schema).Elem()
  	}

  	return s
  }

  func GetCollName(schema interface{}) string {
  	return strings.ToLower(GetSchemaType(schema).Name())

  }

  func GetPriKey(schema interface{}) string {

  	s := GetSchemaType(schema)
  

  	var pri string
  	for i := 0; i < s.NumField(); i++ {
  		if s.Field(i).Tag.Get("pri") == "1" {
  			pri = strings.ToLower(s.Field(i).Name)
  			break
  		}
  	}
  	return pri
  }
  
  func FindIndex(schema interface{}) (string, []string){

  	s := GetSchemaType(schema)

  
  	var index []string

  	for i := 0; i < s.NumField(); i++ {
  		if s.Field(i).Tag.Get("index") != "" {
  			js := strings.Split(s.Field(i).Tag.Get("json"), ",")
  			if len(js) == 0 {
  				continue
  			}

  			index = append(index, js[0])

  		}
  	}

  	return strings.ToLower(s.Name()), index

  }
  
  func Md5V(str string) string  {
  	h := md5.New()
  	h.Write([]byte(str))
  	return hex.EncodeToString(h.Sum(nil))

  }