var MTProtoMap map[string]*telegram.Client = make(map[string]*telegram.Client)

func TInit(phone string, apiId int, apiHash string) *telegram.Client {
	client := telegram.NewClient(apiId, apiHash, telegram.Options{
		SessionStorage: &RedisStorage{
			phone: phone,
		},
	})
	bg.Connect(client)
	MTProtoMap[phone] = client
	return client
}

func Of(phone string, apiId int, apiHash string) *telegram.Client {
	client := MTProtoMap[phone]
	if nil == client {
		client = TInit(phone, apiId, apiHash)
	}
	return client
}

func CheckResult(a tg.AuthAuthorizationClass) (*tg.AuthAuthorization, error) {
	switch a := a.(type) {
	case *tg.AuthAuthorization:
		return a, nil // ok
	case *tg.AuthAuthorizationSignUpRequired:
		return nil, &auth.SignUpRequired{
			TermsOfService: a.TermsOfService,
		}
	default:
		return nil, errors.Errorf("got unexpected response %T", a)
	}
}

func TVerifiedCode(phone string, apiId int, apiHash string, code string, phoneCodeHash string) (*tg.AuthAuthorization, error) {
	client := Of(phone, apiId, apiHash)
	authAuthorization, err := client.API().AuthSignIn(context.Background(), &tg.AuthSignInRequest{
		PhoneNumber:   phone,
		PhoneCodeHash: phoneCodeHash,
		PhoneCode:     code,
	})
	if err != nil {
		return nil, err
	}
	return CheckResult(authAuthorization)
}