package middleware

import (
	"fmt"
	"net/url"
	"sort"
	"strings"
	"surveyService/response"
	"surveyService/util"
	"surveyService/util/constants"

	"github.com/gin-gonic/gin"
	"gogs.uu.mdfitnesscao.com/hys/sdk"
	"gogs.uu.mdfitnesscao.com/hys/sdk/mechanism"
)

func AuthorizeMechanismByAppKey() gin.HandlerFunc {
	return func(c *gin.Context) {
		appKey := c.Request.Header.Get("appkey")
		if appKey == "" {
			response.Fail(c, response.ErrInvalidToken)
			return
		}
		sign := c.Request.Header.Get("sign")
		if sign == "" {
			response.Fail(c, response.ErrSign)
			return
		}
		var currentUser *sdk.AuthMechanism
		var err *response.ErrCode
		// 拿到用户系统的资料
		detailResponse, findErr := mechanism.DetailByAppKey(appKey)
		if findErr != nil {
			response.Fail(c, &response.ErrCode{
				Code: response.INVALID_TOKEN,
				Msg:  findErr.Msg,
			})
			return
		}

		currentUser = &sdk.AuthMechanism{
			ID:             detailResponse.Data.Detail.ID,
			Nickname:       detailResponse.Data.Detail.Nickname,
			Account:        detailResponse.Data.Detail.Account,
			LoginAt:        0,
			IsMechanism:    true,
			FullPermission: false,
			Permissions:    detailResponse.Data.Detail.Permissions,
			Mechanism: &sdk.AuthBaseMechanism{
				ID:              detailResponse.Data.Detail.ID,
				Nickname:        detailResponse.Data.Detail.Nickname,
				Account:         detailResponse.Data.Detail.Account,
				RawId:           detailResponse.Data.Detail.RawId,
				AppKey:          detailResponse.Data.Detail.AppKey,
				AppSecret:       detailResponse.Data.Detail.AppSecret,
				IpWhiteList:     detailResponse.Data.Detail.IpWhiteList,
				CallbackUrlList: detailResponse.Data.Detail.CallbackUrlList,
			},
		}
		if err != nil {
			response.Fail(c, err)
			return
		}

		// 校验签名
		requestData := util.GetRequestJsonData(c)
		makedSign := makeSign(requestData, currentUser.Mechanism.AppSecret)
		// fmt.Println(makedSign, sign)
		if makedSign != sign {
			response.Fail(c, response.ErrSign)
			return
		}
		c.Set(constants.MechanismOpenAPICacheKey, currentUser)
		c.Next()
	}
}

func makeSign(requestData map[string]any, appSecret string) string {
	// 将map的key存储到一个切片中
	keys := make([]string, 0, len(requestData))
	for k := range requestData {
		keys = append(keys, k)
	}
	// 对切片进行排序
	sort.Strings(keys)

	// 将请求参数按照key的升序排列
	var requestDataArray []string = make([]string, 0)
	// 遍历排序后的切片，并使用map的key来访问map中的值
	for _, k := range keys {
		v := requestData[k]
		requestDataArray = append(requestDataArray, k+"="+url.QueryEscape(fmt.Sprint(v)))
	}
	// 拼接成key1=value1&key2=value2&key3=value3的形式
	requestDataString := strings.Join(requestDataArray, "&")
	// fmt.Println("拼装后字段", requestDataString)

	// 将appSecret拼接到最后
	signString := requestDataString + appSecret
	// fmt.Println("待签名字段", signString)

	// 计算md5
	sign := strings.ToUpper(util.Md5(signString))
	// fmt.Println("签名: ", sign)
	return sign
}