package common

import (
	"flag"
	"fmt"
	"os"
)

var (
	cidr    = flag.String("r", "", "")
	list    = flag.String("l", "", "")
	threads = flag.Int("t", 25, "")
	sshmode = flag.Bool("ssh", false, "")
	ftpmode = flag.Bool("ftp", false, "")
	payload = flag.String("p", "", "")
	cmd     = flag.String("c", "", "")
	silent  = flag.Bool("s", false, "")

	Params *Config
)

type Config struct {
	Cidr    string // individual cidr to target
	Targets string // list of target cidrs
	Mode    uint8  // 0:ssh 1:ftp
	Payload string // file to upload
	Command string // commands to run within ssh session after payload upload
	Threads int    // concurrent workers
	Silent  bool   // no verbosity
}

func LoadConf() {
	flag.Usage = usage
	flag.Parse()

	if len(os.Args) == 1 {
		usage()
		os.Exit(1)
	}

	if !*sshmode && !*ftpmode {
		fatal("are you targeting ssh (-ssh) or ftp (-ftp)?")
	}

	if *payload != "" {
		if _, err := os.Stat(*payload); err != nil {
			fatal("payload '" + *payload + "' not found")
		}
	}

	targetcidr := ""
	if *list == "" && *cidr == "" {
		targetcidr = "0.0.0.0/0"
	} else if *cidr != "" {
		if !validcidr(*cidr) {
			fatal(fmt.Sprintf("invalid target cidr: %s", *cidr))
		}

		targetcidr = *cidr
	}

	var mode uint8 = 0
	if *ftpmode {
		mode = 1
	}

	Params = &Config{
		targetcidr,
		*list,
		mode,
		*payload,
		*cmd,
		*threads,
		*silent,
	}
}