package util

import (
	"crypto/md5"
	"fmt"
	"net/url"
	"strconv"
	"strings"
)

func SplitIgnoreSpace(str string, sep string) []string {
	split := strings.Split(str, sep)
	result := make([]string, 0, len(split))
	for _, elem := range split {
		value := strings.TrimSpace(elem)
		if value == "" {
			continue
		}
		result = append(result, value)
	}
	return result
}

func JoinIgnoreSpace(str []string, sep string) string {
	if str == nil || len(str) == 0 {
		return ""
	}
	builder := strings.Builder{}
	for index, elem := range str {
		if elem == "" {
			continue
		}
		builder.WriteString(elem)
		if index != len(str)-1 { // not latest index
			builder.WriteString(sep)
		}
	}
	return builder.String()
}

func ToString(value interface{}) string {
	switch v := value.(type) {
	case string:
		return v
	case uint8, uint16, uint32, uint64:
		convertUint64 := func(value interface{}) uint64 {
			switch v := value.(type) {
			case uint8:
				return uint64(v)
			case uint16:
				return uint64(v)
			case uint32:
				return uint64(v)
			case uint64:
				return v
			default:
				return 0
			}
		}
		return strconv.FormatUint(convertUint64(value), 10)
	case int, int8, int16, int32, int64:
		convertInt64 := func(value interface{}) int64 {
			switch v := value.(type) {
			case int8:
				return int64(v)
			case int16:
				return int64(v)
			case int32:
				return int64(v)
			case int64:
				return v
			case int:
				return int64(v)
			default:
				return 0
			}
		}
		return strconv.FormatInt(convertInt64(value), 10)
	case bool:
		if v {
			return "true"
		}
		return "false"
	// float 效率和直接fmt差距相差不大，为了保证不出问题，还是使用%v
	default:
		str, isOk := value.(fmt.Stringer)
		if isOk {
			return str.String()
		}
		return fmt.Sprintf("%+v", value)
	}
}

// 解码失败则返回原数据
func UrlDecode(str string) string {
	oldStr := str
	str, err := url.QueryUnescape(str)
	if err != nil {
		return oldStr
	}
	return str
}

// 编码url
func UrlEncode(str string) string {
	return url.QueryEscape(str)
}

func String2Md5(str string) string {
	data := []byte(str)
	has := md5.Sum(data)
	md5str := fmt.Sprintf("%x", has)
	return md5str
}