package comm

import (
	"bytes"
	"crypto/hmac"
	"crypto/md5"
	"encoding/hex"
	"encoding/json"
	"sort"
	"strings"
)

func Ksort(params map[string]interface{}) []string {
	keys := make([]string, len(params))
	i := 0
	for k, _ := range params {
		keys[i] = k
		i++
	}
	sort.Strings(keys)
	return keys
}
func KsortToStr(params map[string]string) []string {
	keys := make([]string, len(params))
	i := 0
	for k, _ := range params {
		keys[i] = k
		i++
	}
	sort.Strings(keys)
	return keys
}
func KsortToStrInterface(params map[string]interface{}) []string {
	keys := make([]string, len(params))
	i := 0
	for k, _ := range params {
		keys[i] = k
		i++
	}
	sort.Strings(keys)
	return keys
}

// Marshal 序列化参数
func GetSortJson(o interface{}) string {
	// 序列化一次
	raw, _ := json.Marshal(o)

	// 反序列化为map
	m := make(map[string]interface{})
	reader := bytes.NewReader(raw)
	decode := json.NewDecoder(reader)
	decode.UseNumber()
	_ = decode.Decode(&m)

	// 重新做一次序列化，并禁用Html Escape
	buffer := bytes.NewBufferString("")
	encoder := json.NewEncoder(buffer)
	encoder.SetEscapeHTML(false)
	_ = encoder.Encode(m)

	marshal := strings.TrimSpace(buffer.String()) // Trim掉末尾的换行符
	return marshal
}
func HmacMd5(key, data string) string {
	h := hmac.New(md5.New, []byte(key))
	h.Write([]byte(data))
	return strings.ToUpper(hex.EncodeToString(h.Sum([]byte(""))))
}