// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// 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.

#ifndef vfs_api_h
#define vfs_api_h

#include "FS.h"
#include "FSImpl.h"

extern "C" {
#include <sys/unistd.h>
#include <sys/stat.h>
#include <dirent.h>
}

using namespace fs;

class VFSFileImpl;

class VFSImpl : public FSImpl {

protected:
  friend class VFSFileImpl;

public:
  FileImplPtr open(const char *path, const char *mode, const bool create) override;
  bool exists(const char *path) override;
  bool rename(const char *pathFrom, const char *pathTo) override;
  bool remove(const char *path) override;
  bool mkdir(const char *path) override;
  bool rmdir(const char *path) override;
};

class VFSFileImpl : public FileImpl {
protected:
  VFSImpl *_fs;
  FILE *_f;
  DIR *_d;
  char *_path;
  bool _isDirectory;
  mutable struct stat _stat;
  mutable bool _written;

  void _getStat() const;

public:
  VFSFileImpl(VFSImpl *fs, const char *path, const char *mode);
  ~VFSFileImpl() override;
  size_t write(const uint8_t *buf, size_t size) override;
  size_t read(uint8_t *buf, size_t size) override;
  void flush() override;
  bool seek(uint32_t pos, SeekMode mode) override;
  size_t position() const override;
  size_t size() const override;
  bool setBufferSize(size_t size);
  void close() override;
  const char *path() const override;
  const char *name() const override;
  time_t getLastWrite() override;
  boolean isDirectory(void) override;
  boolean seekDir(long position) override;
  String getNextFileName(void) override;
  String getNextFileName(bool *isDir) override;
  FileImplPtr openNextFile(const char *mode) override;
  void rewindDirectory(void) override;
  operator bool();
};

#endif
