/*
 * Minio Client (C) 2015 Minio, 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 cmd

import (
	"math/rand"
	"path/filepath"
	"time"
)

var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")

// newRandomID generates a random id of regular lower case and uppercase english characters.
func newRandomID(n int) string {
	rand.Seed(time.Now().UTC().UnixNano())
	sid := make([]rune, n)
	for i := range sid {
		sid[i] = letters[rand.Intn(len(letters))]
	}
	return string(sid)
}

// isBucketVirtualStyle is host virtual bucket style?.
func isBucketVirtualStyle(host string) bool {
	s3Virtual, _ := filepath.Match("*.s3*.amazonaws.com", host)
	googleVirtual, _ := filepath.Match("*.storage.googleapis.com", host)
	return s3Virtual || googleVirtual
}