package dns

import (
	"b612.me/starlog"
	"fmt"
	"github.com/spf13/cobra"
	"os"
	"strings"
)

var dnsServer, serverType, queryType string

func init() {
	Cmd.Flags().StringVarP(&dnsServer, "server", "s", "", "dns服务器地址")
	Cmd.Flags().StringVarP(&serverType, "type", "t", "udp", "dns服务器类型,支持udp,tcp,dot,doh")
	Cmd.Flags().StringVarP(&queryType, "query-type", "q", "A", "dns查询类型，支持 A,CNAME,AAAA,MX,NS,SOA,SRV,PTR,ANY,CAA,TLSA,DS,DNSKEY,NSEC,NSEC3,NSEC3PARAM,RRSIG,SPF,SSHFP,TKEY,TSIG,URI")

}

var Cmd = &cobra.Command{
	Use:   "dns",
	Short: "dns查询服务",
	Long:  "DNS查询服务，支持UDP,TCP,DoT,DoH",
	Run: func(cmd *cobra.Command, args []string) {
		itype := 0
		switch strings.ToLower(serverType) {
		case "udp", "":
			itype = 0
		case "tcp":
			itype = 1
		case "dot":
			itype = 2
		case "doh":
			itype = 3
		default:
			starlog.Errorln("unsupport server type:", serverType)
			os.Exit(1)
		}
		localdns := GetDNSServers()
		for _, v := range localdns {
			fmt.Println("本地DNS:", v.String())
		}
		if dnsServer == "" {
			switch itype {
			case 0, 1:
				if len(localdns) != 0 {
					dnsServer = localdns[0].String()
				} else {
					dnsServer = "223.5.5.5:53"
				}
			case 2:
				dnsServer = "dns.b612.me:853"
			case 3:
				dnsServer = "https://dns.b612.me/dns-query"
			}
		}
		if (itype == 0 || itype == 1) && !strings.Contains(dnsServer, ":") {
			dnsServer = dnsServer + ":53"
		}
		if len(args) == 0 {
			starlog.Errorln("请输入查询目标")
			return
		}
		queryType = strings.ToUpper(queryType)
		fmt.Println("查询DNS:", dnsServer)
		fmt.Println("查询类型:", queryType)
		for _, target := range args {
			data, err := QueryDns(target, queryType, itype, dnsServer)
			if err != nil {
				starlog.Errorln(err)
				os.Exit(2)
			}
			fmt.Println("\n")
			fmt.Println("Query:", target)
			fmt.Println(data.Str)
		}
	},
}