package vend

import (
	"encoding/base64"
	"encoding/json"
	"fmt"
	"github.com/gin-gonic/gin"
	"io/ioutil"
	"net/http"
	"recook/internal/back"
	"recook/internal/dbc"
	"recook/internal/define"
	"recook/internal/model/vend"
	"recook/tools"
	"time"
)

const WxMiniUserOpenIDUrl = "https://api.weixin.qq.com/sns/jscode2session?appid=%v&secret=%v&js_code=%v&grant_type=authorization_code"

type miniLoginParam struct {
	AuthCode string `json:"auth_code" validator:"required"`
}

type openidResp struct {
	OpenID     string `json:"openid" validate:"required"`
	UnionId    string `json:"unionId" validate:"required"`
	SessionKey string `json:"session_key"`
	ErrMsg     string `json:"errmsg"`
}

//通过小程序登录
func LoginByMiniProgram(c *gin.Context) {
	var p miniLoginParam
	if err := tools.Params(&p, c); err != nil {
		back.Fail(c, err.Error())
		return
	}
	response, err := http.Get(fmt.Sprintf(WxMiniUserOpenIDUrl, define.WxMiniProgramAppID, define.WxMiniProgramAppSecret, p.AuthCode))
	if err != nil {
		back.Err(c, err.Error())
		return
	}
	defer func() { _ = response.Body.Close() }()
	body, err := ioutil.ReadAll(response.Body)
	if err != nil {
		back.Fail(c, err.Error())
		return
	}

	var resp openidResp
	if err = json.Unmarshal(body, &resp); err != nil {
		back.Fail(c, err.Error())
		return
	}

	if len(resp.ErrMsg) > 0 {
		back.Fail(c, "微信授权失败"+resp.ErrMsg)
		return
	}

	//将openid信息插入到数据库
	var gysUsersThird vend.GysUsersThird
	dbc.DB.First(&gysUsersThird, "`type` = ? and code=?", vend.GysUsersThirdTypeWxApp, resp.OpenID)
	if gysUsersThird.Id <= 0 {
		gysUsersThird.Code = resp.OpenID
		gysUsersThird.Type = vend.GysUsersThirdTypeWxApp
		dbc.DB.Create(&gysUsersThird)
	}
	var sessionId = tools.MD5(resp.OpenID)
	dbc.Rds.Set(fmt.Sprintf("wxapp:session_key:%v:%v", define.WxMiniProgramAppID, resp.OpenID), resp.SessionKey, time.Hour*24)

	if gysUsersThird.UserId > 0 {
		// 缓存session_key 1天
		dbc.Rds.Set(fmt.Sprintf("wxapp:login:gys:%v:gysid", gysUsersThird.UserId), sessionId, time.Hour*24)
	}
	//下面返回的信息，会在以后的请求头中。
	back.Suc(c, "", gin.H{
		"session_id": sessionId,
		"gys_id":     gysUsersThird.UserId,
		"openId":     resp.OpenID,
	})
	return

}

type argsCrypto struct {
	EncryptedData string `json:"encryptedData" form:"encryptedData"`
	Iv            string `json:"iv" form:"iv"`
	OpenId        string `json:"openId" form:"openId"`
}

type UserPhone struct {
	CountryCode     string `json:"countryCode"`
	PhoneNumber     string `json:"phoneNumber"`
	PurePhoneNumber string `json:"purePhoneNumber"`
	Watermark       struct {
		Appid     string `json:"appid"`
		Timestamp int64  `json:"timestamp"`
	} `json:"watermark"`
}

// @Style 设置手机号
func Phone(c *gin.Context) {
	args := argsCrypto{}
	if err := tools.Params(&args, c); err != nil {
		back.Fail(c, err.Error())
		return
	}
	gysUserThird := vend.GysUsersThird{}
	dbc.DB.First(&gysUserThird, "`type` = ? and code = ?", vend.GysUsersThirdTypeWxApp, args.OpenId)
	if gysUserThird.UserId > 0 {
		back.Suc(c, "操作成功", gin.H{
			"gys_id": gysUserThird.UserId,
		})
		return
	}
	sessionKey := dbc.Rds.Get(fmt.Sprintf("wxapp:session_key:%v:%v", define.WxMiniProgramAppID, args.OpenId)).Val()

	decodeString, _ := base64.StdEncoding.DecodeString(args.EncryptedData)
	key, _ := base64.StdEncoding.DecodeString(sessionKey)
	iv, _ := base64.StdEncoding.DecodeString(args.Iv)

	jsonData, _ := tools.AesCBCDecrypt(decodeString, key, iv)
	userPhone := UserPhone{}
	json.Unmarshal(jsonData, &userPhone)
	if userPhone.Watermark.Appid != define.WxMiniProgramAppID {
		back.Fail(c, "登录超时")
		return
	}
	vendData := vend.GysUsers{}
	dbc.DB.First(&vendData, "username = ?", userPhone.PhoneNumber)
	if vendData.ID <= 0 {
		vendData.Username = userPhone.PhoneNumber
		vendData.Password = tools.RandStr(6, "0123456789")
		dbc.DB.Create(&vendData)
		if vendData.ID <= 0 {
			back.Fail(c, "网络异常")
			return
		}
	}
	dbc.DB.Model(&gysUserThird).Updates(&vend.GysUsersThird{
		UserId: vendData.ID,
	})
	// 缓存session_key 1天
	var sessionId = tools.MD5(args.OpenId)
	dbc.Rds.Set(fmt.Sprintf("wxapp:login:gys:%v:gysid", vendData.ID), sessionId, time.Hour*24)
	back.Suc(c, "操作成功", gin.H{
		"gys_id": vendData.ID,
	})
}