// Copyright 2015 CoreOS, Inc.
//
// 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 etcdserver

import (
	"errors"

	etcdErr "github.com/coreos/etcd/error"

	"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
)

var (
	ErrUnknownMethod = errors.New("etcdserver: unknown method")
	ErrStopped       = errors.New("etcdserver: server stopped")
	ErrIDRemoved     = errors.New("etcdserver: ID removed")
	ErrIDExists      = errors.New("etcdserver: ID exists")
	ErrIDNotFound    = errors.New("etcdserver: ID not found")
	ErrPeerURLexists = errors.New("etcdserver: peerURL exists")
	ErrCanceled      = errors.New("etcdserver: request cancelled")
	ErrTimeout       = errors.New("etcdserver: request timed out")
)

func parseCtxErr(err error) error {
	switch err {
	case context.Canceled:
		return ErrCanceled
	case context.DeadlineExceeded:
		return ErrTimeout
	default:
		return err
	}
}

func isKeyNotFound(err error) bool {
	e, ok := err.(*etcdErr.Error)
	return ok && e.ErrorCode == etcdErr.EcodeKeyNotFound
}