// 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) 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;
    void        close() override;
    const char* name() const override;
    time_t getLastWrite()  override;
    boolean     isDirectory(void) override;
    FileImplPtr openNextFile(const char* mode) override;
    void        rewindDirectory(void) override;
    operator    bool();
};

#endif