package vmess

import (
	"errors"
	"net"
	"net/url"
	"strconv"

	"github.com/nadoo/glider/common/log"
	"github.com/nadoo/glider/proxy"
)

// VMess .
type VMess struct {
	dialer proxy.Dialer
	addr   string

	uuid    string
	alertID uint32

	outboundSecurity string
	streamProtocol   string
	streamSecurity   string
}

func init() {
	proxy.RegisterDialer("vmess", NewVMessDialer)
}

// NewVMess returns a vmess proxy.
func NewVMess(s string, dialer proxy.Dialer) (*VMess, error) {
	u, err := url.Parse(s)
	if err != nil {
		log.F("parse url err: %s", err)
		return nil, err
	}

	addr := u.Host

	var uuid, aid string
	if u.User != nil {
		uuid = u.User.Username()
		aid, _ = u.User.Password()
	}

	alertID, err := strconv.ParseUint(aid, 10, 32)
	if err != nil {
		log.F("parse alertID err: %s", err)
		return nil, err
	}

	p := &VMess{
		dialer:           dialer,
		addr:             addr,
		uuid:             uuid,
		alertID:          uint32(alertID),
		outboundSecurity: "auto",
		streamProtocol:   "tcp",
		streamSecurity:   "tls",
	}

	return p, nil
}

// NewVMessDialer returns a vmess proxy dialer.
func NewVMessDialer(s string, dialer proxy.Dialer) (proxy.Dialer, error) {
	return NewVMess(s, dialer)
}

// Addr returns forwarder's address
func (s *VMess) Addr() string { return s.addr }

// NextDialer returns the next dialer
func (s *VMess) NextDialer(dstAddr string) proxy.Dialer { return s.dialer.NextDialer(dstAddr) }

// Dial connects to the address addr on the network net via the proxy.
func (s *VMess) Dial(network, addr string) (net.Conn, error) {
	return nil, nil
}

// DialUDP connects to the given address via the proxy.
func (s *VMess) DialUDP(network, addr string) (net.PacketConn, net.Addr, error) {
	return nil, nil, errors.New("vmess client does not support udp now")
}