package gopay

import (
	"crypto/tls"
	"encoding/xml"
	"fmt"
	"github.com/parnurzeal/gorequest"
	"io"
	"math/rand"
	"reflect"
	"sort"
	"strconv"
	"strings"
	"time"
)

type BodyMap map[string]interface{}

//设置参数
//    value：仅支持类型 string,int,int64,float32,float64,ptr,struct,slice,map 类型，其他类型一律设置空字符串
func (bm BodyMap) Set(key string, value interface{}) {
	//验证参数类型
	vKind := reflect.ValueOf(value).Kind()
	//fmt.Println("vKind:", vKind)
	switch vKind {
	case reflect.String:
		bm[key] = value.(string)
	case reflect.Int:
		bm[key] = Int2String(value.(int))
	case reflect.Int64:
		bm[key] = Int642String(value.(int64))
	case reflect.Float32:
		bm[key] = Float32ToString(value.(float32))
	case reflect.Float64:
		bm[key] = Float64ToString(value.(float64))
	case reflect.Ptr:
		bm[key] = value
	case reflect.Struct:
		bm[key] = value
	case reflect.Map:
		bm[key] = value
	case reflect.Slice:
		bm[key] = value
	default:
		bm[key] = ""
	}
}

//获取参数
func (bm BodyMap) Get(key string) string {
	if bm == nil {
		return null
	}
	value, ok := bm[key]
	if !ok {
		return null
	}
	_, ok2 := value.(string)
	if ok2 {
		return value.(string)
	}
	return jsonToString(value)
}

//删除参数
func (bm BodyMap) Remove(key string) {
	delete(bm, key)
}

type xmlMapEntry struct {
	XMLName xml.Name
	Value   string `xml:",chardata"`
}

func (bm BodyMap) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if len(bm) == 0 {
		return nil
	}

	err := e.EncodeToken(start)
	if err != nil {
		return err
	}
	var value string
	for k, v := range bm {
		//验证参数类型
		fmt.Println("k:", k)
		vKind := reflect.ValueOf(v).Kind()
		//fmt.Println("vKind:", vKind)
		switch vKind {
		case reflect.String:
			value = v.(string)
		case reflect.Int:
			value = Int2String(v.(int))
		case reflect.Int64:
			value = Int642String(v.(int64))
		case reflect.Float32:
			value = Float32ToString(v.(float32))
		case reflect.Float64:
			value = Float64ToString(v.(float64))
		default:
			value = ""
		}
		e.Encode(xmlMapEntry{XMLName: xml.Name{Local: k}, Value: value})
	}

	return e.EncodeToken(start.End())
}

func (bm *BodyMap) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	for {
		var e xmlMapEntry
		err := d.Decode(&e)
		if err == io.EOF {
			break
		} else if err != nil {
			return err
		}
		bm.Set(e.XMLName.Local, e.Value)
		//(*bm)[e.XMLName.Local] = e.Value
	}
	return nil
}

// ("bar=baz&foo=quux") sorted by key.
func (bm BodyMap) EncodeWeChatSignParams(apiKey string) string {
	var buf strings.Builder
	keyList := make([]string, 0, len(bm))
	for k := range bm {
		keyList = append(keyList, k)
	}
	sort.Strings(keyList)
	for _, k := range keyList {
		buf.WriteString(k)
		buf.WriteByte('=')
		buf.WriteString(bm.Get(k))
		buf.WriteByte('&')
	}
	buf.WriteString("key")
	buf.WriteByte('=')
	buf.WriteString(apiKey)
	return buf.String()
}

// ("bar=baz&foo=quux") sorted by key.
func (bm BodyMap) EncodeAliPaySignParams() string {
	var buf strings.Builder
	keyList := make([]string, 0, len(bm))
	for k := range bm {
		keyList = append(keyList, k)
	}
	sort.Strings(keyList)
	for _, k := range keyList {
		buf.WriteString(k)
		buf.WriteByte('=')
		buf.WriteString(bm.Get(k))
		buf.WriteByte('&')
	}
	s := buf.String()
	i := buf.Len()
	return s[:i-1]
}

//HttpAgent
func HttpAgent() (agent *gorequest.SuperAgent) {
	agent = gorequest.New()
	agent.TLSClientConfig(&tls.Config{InsecureSkipVerify: true})
	return
}

//获取随机字符串
//    length：字符串长度
func GetRandomString(length int) string {
	str := "0123456789AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
	b := []byte(str)
	var result []byte
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	for i := 0; i < length; i++ {
		result = append(result, b[r.Intn(len(b))])
	}
	return string(result)
}

//解析时间
func ParseDateTime(timeStr string) (datetime time.Time) {
	datetime, _ = time.ParseInLocation(TimeLayout, timeStr, time.Local)
	return
}

//格式化Datetime
func FormatDateTime(timeStr string) (formatTime string) {
	//2019-01-04T15:40:00Z
	//2019-01-18 20:51:30+08:00
	if timeStr == null {
		return null
	}
	replace := strings.Replace(timeStr, "T", " ", 1)
	formatTime = replace[:19]
	return
}

//格式化
func FormatDate(dateStr string) (formatDate string) {
	//2020-12-30T00:00:00+08:00
	if dateStr == null {
		return null
	}
	split := strings.Split(dateStr, "T")
	formatDate = split[0]
	return
}

//字符串转Float
func String2Float(floatStr string) (floatNum float64) {
	floatNum, _ = strconv.ParseFloat(floatStr, 64)
	return
}

//Float64转字符串
//    floatNum：float64数字
//    prec：精度位数（不传则默认float数字精度）
func Float64ToString(floatNum float64, prec ...int) (floatStr string) {
	if len(prec) > 0 {
		floatStr = strconv.FormatFloat(floatNum, 'f', prec[0], 64)
		return
	}
	floatStr = strconv.FormatFloat(floatNum, 'f', -1, 64)
	return
}

//Float32转字符串
//    floatNum：float32数字
//    prec：精度位数（不传则默认float数字精度）
func Float32ToString(floatNum float32, prec ...int) (floatStr string) {
	if len(prec) > 0 {
		floatStr = strconv.FormatFloat(float64(floatNum), 'f', prec[0], 32)
		return
	}
	floatStr = strconv.FormatFloat(float64(floatNum), 'f', -1, 32)
	return
}

//字符串转Int
func String2Int(intStr string) (intNum int) {
	intNum, _ = strconv.Atoi(intStr)
	return
}

//字符串转Int64
func String2Int64(intStr string) (int64Num int64) {
	intNum, _ := strconv.Atoi(intStr)
	int64Num = int64(intNum)
	return
}

//Int转字符串
func Int2String(intNum int) (intStr string) {
	intStr = strconv.Itoa(intNum)
	return
}

//Int64转字符串
func Int642String(intNum int64) (int64Str string) {
	//10, 代表10进制
	int64Str = strconv.FormatInt(intNum, 10)
	return
}

//解密填充模式（去除补全码） PKCS7UnPadding
//解密时，需要在最后面去掉加密时添加的填充byte
func PKCS7UnPadding(origData []byte) (bs []byte) {
	length := len(origData)
	unpaddingNumber := int(origData[length-1]) //找到Byte数组最后的填充byte 数字
	bs = origData[:(length - unpaddingNumber)] //只截取返回有效数字内的byte数组
	return
}

//解密填充模式（去除补全码） PKCS5UnPadding
//解密时，需要在最后面去掉加密时添加的填充byte
func PKCS5UnPadding(origData []byte) (bs []byte) {
	length := len(origData)
	unpaddingNumber := int(origData[length-1]) //找到Byte数组最后的填充byte
	bs = origData[:(length - unpaddingNumber)] //只截取返回有效数字内的byte数组
	return
}