package utils

import (
	"context"
	"net/url"
	"strconv"

	"github.com/mssola/user_agent"
	"google.golang.org/grpc/metadata"
)

type UserInfo struct {
	ID          int64
	Name        string
	RawUID      string
	Refresh     string
	ClientIP    string // 客户端ip
	UserAgent   string // 完整原始ua
	BrowserName string // 浏览器名称
	BrowserVer  string // 浏览器版本
	Valid       bool
}

func GetUserFromCtx(ctx context.Context) UserInfo {
	md, ok := metadata.FromIncomingContext(ctx)
	if !ok {
		return UserInfo{Valid: false}
	}
	uidList := md.Get("x-user-id")
	nameList := md.Get("x-user-name")
	refreshList := md.Get("x-refresh")
	ipList := md.Get("x-client-ip")
	userAgentList := md.Get("x-user-agent")

	if len(refreshList) == NumberZero {
		refreshList = md.Get("X-Refresh")
	}
	var userInfo UserInfo
	if len(uidList) > 0 {
		userInfo.RawUID = uidList[0]
	}
	if len(nameList) > 0 {
		userInfo.Name = nameList[0]
	}
	if len(refreshList) > 0 {
		userInfo.Refresh = refreshList[0]
	}

	if len(ipList) > 0 {
		userInfo.ClientIP = ipList[0]
	}
	if len(userAgentList) > 0 {
		userInfo.UserAgent = userAgentList[0]
		userInfo.UserAgent, _ = url.QueryUnescape(userInfo.UserAgent)
		ua := user_agent.New(userInfo.UserAgent)
		userInfo.BrowserName, userInfo.BrowserVer = ua.Browser()
	}
	userInfo.Valid = false
	if userInfo.RawUID == StringEmpty {
		return userInfo
	}

	uid, err := strconv.ParseInt(userInfo.RawUID, NumberTen, NumberSixtyFourth)
	if err != nil {
		return userInfo
	}

	userName, _ := url.QueryUnescape(userInfo.Name)
	userInfo.ID = uid
	userInfo.Name = userName
	userInfo.Valid = true

	return userInfo
}