// Copyright © 2014 Steve Francia <spf@spf13.com>.

//

// 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 afero

import (

	"errors"

	"net/http"

	"os"

	"path"

	"path/filepath"

	"strings"

	"time"

)

type httpDir struct {

	basePath string

	fs       HttpFs

}

func (d httpDir) Open(name string) (http.File, error) {

		strings.Contains(name, "\x00") {

		return nil, errors.New("http: invalid character in file path")

	}

	dir := string(d.basePath)

	if dir == "" {

		dir = "."

	}

	f, err := d.fs.Open(filepath.Join(dir, filepath.FromSlash(path.Clean("/"+name))))

	if err != nil {

		return nil, err

	}

	return f, nil

}

type HttpFs struct {

	source Fs

}

func NewHttpFs(source Fs) *HttpFs {

	return &HttpFs{source: source}

}

func (h HttpFs) Dir(s string) *httpDir {

	return &httpDir{basePath: s, fs: h}

}

func (h HttpFs) Name() string { return "h HttpFs" }

func (h HttpFs) Create(name string) (File, error) {

	return h.source.Create(name)

}

func (h HttpFs) Chmod(name string, mode os.FileMode) error {

	return h.source.Chmod(name, mode)

}

func (h HttpFs) Chown(name string, uid, gid int) error {

	return h.source.Chown(name, uid, gid)

}

func (h HttpFs) Chtimes(name string, atime time.Time, mtime time.Time) error {

	return h.source.Chtimes(name, atime, mtime)

}

func (h HttpFs) Mkdir(name string, perm os.FileMode) error {

	return h.source.Mkdir(name, perm)

}

func (h HttpFs) MkdirAll(path string, perm os.FileMode) error {

	return h.source.MkdirAll(path, perm)

}

func (h HttpFs) Open(name string) (http.File, error) {

	f, err := h.source.Open(name)

	if err == nil {

		if httpfile, ok := f.(http.File); ok {

			return httpfile, nil

		}

	}

	return nil, err

}

func (h HttpFs) OpenFile(name string, flag int, perm os.FileMode) (File, error) {

	return h.source.OpenFile(name, flag, perm)

}

func (h HttpFs) Remove(name string) error {

	return h.source.Remove(name)

}

func (h HttpFs) RemoveAll(path string) error {

	return h.source.RemoveAll(path)

}

func (h HttpFs) Rename(oldname, newname string) error {

	return h.source.Rename(oldname, newname)

}

func (h HttpFs) Stat(name string) (os.FileInfo, error) {

	return h.source.Stat(name)

}