/*
Copyright 2020 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package e2e

import (
	"strings"

	apierrors "k8s.io/apimachinery/pkg/api/errors"
	utilnet "k8s.io/apimachinery/pkg/util/net"
)

func isRetryableAPIError(err error) bool {
	// These errors may indicate a transient error that we can retry in tests.
	if apierrors.IsInternalError(err) || apierrors.IsTimeout(err) || apierrors.IsServerTimeout(err) ||
		apierrors.IsTooManyRequests(err) || utilnet.IsProbableEOF(err) || utilnet.IsConnectionReset(err) ||
		utilnet.IsConnectionRefused(err) {
		return true
	}

	// If the error sends the Retry-After header, we respect it as an explicit confirmation we should retry.
	if _, shouldRetry := apierrors.SuggestsClientDelay(err); shouldRetry {
		return true
	}

	// "etcdserver: request timed out" does not seem to match the timeout errors above
	if strings.Contains(err.Error(), "etcdserver: request timed out") {
		return true
	}

	return false
}