package telegram

import (
	"context"
	"net"

	"github.com/9seconds/mtg/conntypes"
	"github.com/9seconds/mtg/wrappers"
)

const (
	directV4DefaultIdx conntypes.DC = 1
	directV6DefaultIdx conntypes.DC = 1
)

var (
	directV4Addresses = map[conntypes.DC][]string{
		0: {"149.154.175.50:443"},
		1: {"149.154.167.51:443"},
		2: {"149.154.175.100:443"},
		3: {"149.154.167.91:443"},
		4: {"149.154.171.5:443"},
	}
	directV6Addresses = map[conntypes.DC][]string{
		0: {"[2001:b28:f23d:f001::a]:443"},
		1: {"[2001:67c:04e8:f002::a]:443"},
		2: {"[2001:b28:f23d:f003::a]:443"},
		3: {"[2001:67c:04e8:f004::a]:443"},
		4: {"[2001:b28:f23f:f005::a]:443"},
	}
)

type directTelegram struct {
	baseTelegram
}

func (d *directTelegram) Dial(ctx context.Context,
	cancel context.CancelFunc,
	dc conntypes.DC,
	protocol conntypes.ConnectionProtocol) (wrappers.StreamReadWriteCloser, error) {
	switch {
	case dc < 0:
		dc = -dc
	case dc == 0:
		dc = conntypes.DCDefaultIdx
	}

	return d.baseTelegram.dial(ctx, cancel, dc-1, protocol)
}

func NewDirectTelegram() Telegram {
	return &directTelegram{
		baseTelegram: baseTelegram{
			dialer:      net.Dialer{Timeout: telegramDialTimeout},
			v4DefaultDC: directV4DefaultIdx,
			V6DefaultDC: directV6DefaultIdx,
			v4Addresses: directV4Addresses,
			v6Addresses: directV6Addresses,
		},
	}
}