package base

import (
	"crypto/sha512"
	"encoding/json"
	"fmt"
	"net/url"
	"reflect"
	"sort"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/liangdas/mqant/log"
)

func GetSignStr(send interface{}, pass ...string) string {
	m := StructToMapJson(send)
	str := []string{}
	for i := range m {
		if i == "sign" {
			continue
		}
		shouldPass := false
		for _, v := range pass {
			if v == i {
				shouldPass = true
				break
			}
		}
		if shouldPass {
			continue
		}
		str = append(str, i)
	}
	sort.Strings(str)
	signStr := ""
	for i, v := range str {
		signStr += fmt.Sprintf("%v=%v", v, m[v])
		if i != len(str)-1 {
			signStr += "&"
		}
	}
	log.Debug("signStr:%s", signStr)
	return signStr
}

// 包含空字段
func GetSignStrEmpty(send interface{}, pass ...string) string {
	m := StructToMapJsonEmpty(send)
	str := []string{}
	for i := range m {
		if i == "sign" {
			continue
		}
		shouldPass := false
		for _, v := range pass {
			if v == i {
				shouldPass = true
				break
			}
		}
		if shouldPass {
			continue
		}
		str = append(str, i)
	}
	sort.Strings(str)
	signStr := ""
	for i, v := range str {
		signStr += fmt.Sprintf("%v=%v", v, m[v])
		if i != len(str)-1 {
			signStr += "&"
		}
	}
	log.Debug("signStr:%s", signStr)
	return signStr
}

// 连接参数时不加&符号，且不加key值，直接value拼接
func GetSignStr2(send interface{}, pass ...string) string {
	m := StructToMapJson(send)
	str := []string{}
	for i := range m {
		if i == "sign" {
			continue
		}
		shouldPass := false
		for _, v := range pass {
			if v == i {
				shouldPass = true
				break
			}
		}
		if shouldPass {
			continue
		}
		str = append(str, i)
	}
	sort.Strings(str)
	signStr := ""
	for _, v := range str {
		signStr += fmt.Sprintf("%v", m[v])
	}
	log.Debug("signStr:%s", signStr)
	return signStr
}

func StructToMapJson(obj interface{}) map[string]interface{} {
	t := reflect.TypeOf(obj)
	v := reflect.ValueOf(obj)
	if t.Kind() == reflect.Ptr {
		t = t.Elem()
		v = v.Elem()
	}
	var result = make(map[string]interface{})
	for i := 0; i < t.NumField(); i++ {
		if v.Field(i).Kind() == reflect.Ptr && v.Field(i).IsNil() {
			continue
		}
		tagName := t.Field(i).Tag.Get("json")
		if tagName != "" && tagName != "-" && !v.Field(i).IsZero() {
			data := v.Field(i).Interface()
			if v.Field(i).Kind() == reflect.Struct {
				data = GetSignStr(data)
			}
			name := strings.Split(tagName, ",")
			result[name[0]] = data
		}
	}

	return result
}

func StructToMapJsonEmpty(obj interface{}) map[string]interface{} {
	t := reflect.TypeOf(obj)
	v := reflect.ValueOf(obj)
	if t.Kind() == reflect.Ptr {
		t = t.Elem()
		v = v.Elem()
	}
	var result = make(map[string]interface{})
	for i := 0; i < t.NumField(); i++ {
		if v.Field(i).Kind() == reflect.Ptr && v.Field(i).IsNil() {
			continue
		}
		tagName := t.Field(i).Tag.Get("json")
		if tagName != "" && tagName != "-" {
			data := v.Field(i).Interface()
			if v.Field(i).Kind() == reflect.Struct {
				data = GetSignStr(data)
			}
			name := strings.Split(tagName, ",")
			result[name[0]] = data
		}
	}

	return result
}

// 根据body里的字段直接拼接出签名字符串(去除null)
func GetSignStrNull(str string, pass ...string) string {
	m := map[string]json.RawMessage{}
	sortStrs := []string{}
	json.Unmarshal([]byte(str), &m)
	for i := range m {
		sortStrs = append(sortStrs, i)
	}
	signStr := ""
	sort.Strings(sortStrs)
	for _, v := range sortStrs {
		shouldPass := false
		for _, s := range pass {
			if v == s {
				shouldPass = true
				break
			}
		}
		if shouldPass {
			continue
		}
		if len(m[v]) > 1 && m[v][0] == 34 {
			m[v] = m[v][1 : len(m[v])-1]
		}
		if len(m[v]) == 0 || string(m[v]) == "null" {
			continue
		}
		signStr += fmt.Sprintf("%v=%v", v, string(m[v]))
		signStr += "&"
	}
	signStr = signStr[:len(signStr)-1]
	log.Debug("signStr:%v", signStr)
	return signStr
}

func SHA512(data string) string {
	hash := sha512.Sum512([]byte(data))
	return fmt.Sprintf("%x", hash)
}

func GetSignStrGet(vals url.Values, pass ...string) string {
	sortStrs := []string{}
	for k := range vals {
		sortStrs = append(sortStrs, k)
	}
	signStr := ""
	sort.Strings(sortStrs)
	for _, v := range sortStrs {
		shouldPass := false
		for _, s := range pass {
			if v == s {
				shouldPass = true
				break
			}
		}
		if shouldPass {
			continue
		}
		if len(vals.Get(v)) == 0 {
			continue
		}
		signStr += fmt.Sprintf("%v=%v", v, vals.Get(v))
		signStr += "&"
	}
	signStr = signStr[:len(signStr)-1]
	log.Debug("signStr:%v", signStr)
	return signStr
}

func GetSignStrFormURLEncode(c *gin.Context, model interface{}, pass ...string) string {
	sortStrs := []string{}
	for k := range c.Request.URL.Query() {
		sortStrs = append(sortStrs, k)
	}
	// ref := reflect.ValueOf(model)
	reft := reflect.TypeOf(model)
	if reft.Kind() == reflect.Ptr {
		// ref = ref.Elem()
		reft = reft.Elem()
	}
	signStr := ""
	sort.Strings(sortStrs)
	for _, v := range sortStrs {
		shouldPass := false
		for _, s := range pass {
			if v == s {
				shouldPass = true
				break
			}
		}
		if shouldPass {
			continue
		}
		param := c.Query(v)
		if len(param) == 0 {
			continue
		}
		first := v[0]
		tmpName := strings.ToUpper(string(first)) + v[1:]
		field, ok := reft.FieldByName(tmpName)
		if ok && field.Tag.Get("encode") == "1" { // 需要urlencode
			param, _ = url.QueryUnescape(param)
		}

		signStr += fmt.Sprintf("%v=%v", v, param)
		signStr += "&"
	}
	fmt.Println(signStr)
	signStr = signStr[:len(signStr)-1]
	log.Debug("signStr:%v", signStr)
	return signStr
}

// 根据body里的字段直接拼接出签名字符串
func GetSignStrURLEncode(str string, pass ...string) string {
	sortStrs := []string{}
	all, err := url.ParseQuery(str)
	if err != nil {
		log.Error("err:%e", err)
		return ""
	}
	for k := range all {
		sortStrs = append(sortStrs, k)
	}

	signStr := ""
	sort.Strings(sortStrs)
	for _, v := range sortStrs {
		shouldPass := false
		for _, s := range pass {
			if v == s {
				shouldPass = true
				break
			}
		}
		if shouldPass {
			continue
		}
		tmp := all.Get(v)
		if len(tmp) > 1 && tmp[0] == 34 {
			tmp = tmp[1 : len(tmp)-1]
		}
		if len(tmp) == 0 {
			continue
		}
		signStr += fmt.Sprintf("%v=%v", v, string(tmp))
		signStr += "&"
	}
	signStr = signStr[:len(signStr)-1]
	log.Debug("signStr:%v", signStr)
	return signStr
}