package utils

import (
	"fmt"
	"go.uber.org/zap"
	"net"
	"net/http"
	"regexp"
	"sfbase/utils"
	"strings"
)

var (
	userAppIDEncrypt = &utils.SimpleEncrypt{"sfis20212120"}
	strReg           = regexp.MustCompile("^[0-9a-zA-Z]+$")
)

func GetAppID(tn int64) (appID string) {
	for {
		randomstr := utils.GetLetterRandom(5)
		str := fmt.Sprintf("%s%d%s", randomstr[:2], tn, randomstr[2:])
		appID = userAppIDEncrypt.EncodeString(str)
		if strReg.MatchString(appID) {
			break
		}
	}
	appID = "sf" + appID
	return
}

func GetIp(req *http.Request) string {
	if req == nil {
		return ""
	}
	ip_for := req.Header.Get("x-forwarded-for")
	ip_client := req.Header.Get("http_client_ip")
	ip_addr := req.Header.Get("Remote_addr")
	un := "unknown"
	if (ip_for != un) && (len(strings.TrimSpace(ip_for)) > 0) {
		return ip_for
	}
	if (ip_client != un) && (len(strings.TrimSpace(ip_client)) > 0) {
		return ip_client
	}
	if (ip_addr != un) && (len(strings.TrimSpace(ip_addr)) > 0) {
		return ip_addr
	}
	ip, _, _ := net.SplitHostPort(req.RemoteAddr)
	return ip
}

func getUserProductError(appID string, productID int, err error) []zap.Field {
	arr := make([]zap.Field, 0)
	arr = append(arr, zap.Any("appID:", appID))
	arr = append(arr, zap.Any("productID:", productID))
	arr = append(arr, zap.Any("error:", err))
	return arr
}

func getUserProductInfo(appID string, productID int, key string, info interface{}) []zap.Field {
	arr := make([]zap.Field, 0)
	arr = append(arr, zap.Any("appID:", appID))
	arr = append(arr, zap.Any("productID:", productID))
	arr = append(arr, zap.Any(key, info))
	return arr
}