package dc

import (
	"context"
	"time"
)

type preferIP uint8

const (
	preferIPOnlyIPv4 preferIP = iota
	preferIPOnlyIPv6
	preferIPPreferIPv4
	preferIPPreferIPv6
)

const (
	// Default DC to connect to if not sure.
	DefaultDC = 2

	// How often should we request updates from
	// https://core.telegram.org/getProxyConfig
	PublicConfigUpdateEach  = time.Hour
	PublicConfigUpdateURLv4 = "https://core.telegram.org/getProxyConfig"
	PublicConfigUpdateURLv6 = "https://core.telegram.org/getProxyConfigV6"

	// How often should we extract hosts from Telegram using help.getConfig
	// method.
	OwnConfigUpdateEach = time.Hour
)

type Logger interface {
	Info(msg string)
	WarningError(msg string, err error)
}

type Updater interface {
	Run(ctx context.Context)
}

// https://github.com/telegramdesktop/tdesktop/blob/master/Telegram/SourceFiles/mtproto/mtproto_dc_options.cpp#L30
var defaultDCAddrSet = dcAddrSet{
	v4: map[int][]Addr{
		1: {
			{Network: "tcp4", Address: "149.154.175.50:443"},
		},
		2: {
			{Network: "tcp4", Address: "149.154.167.51:443"},
			{Network: "tcp4", Address: "95.161.76.100:443"},
		},
		3: {
			{Network: "tcp4", Address: "149.154.175.100:443"},
		},
		4: {
			{Network: "tcp4", Address: "149.154.167.91:443"},
		},
		5: {
			{Network: "tcp4", Address: "149.154.171.5:443"},
		},
		203: {
			{Network: "tcp4", Address: "91.105.192.100:443"},
		},
	},
	v6: map[int][]Addr{
		1: {
			{Network: "tcp6", Address: "[2001:b28:f23d:f001::a]:443"},
		},
		2: {
			{Network: "tcp6", Address: "[2001:67c:04e8:f002::a]:443"},
		},
		3: {
			{Network: "tcp6", Address: "[2001:b28:f23d:f003::a]:443"},
		},
		4: {
			{Network: "tcp6", Address: "[2001:67c:04e8:f004::a]:443"},
		},
		5: {
			{Network: "tcp6", Address: "[2001:b28:f23f:f005::a]:443"},
		},
		203: {
			{Network: "tcp6", Address: "[2a0a:f280:0203:000a:5000:0000:0000:0100]:443"},
		},
	},
}