// Copyright 2013 Google Inc. All Rights Reserved.

#ifndef WVCDM_CDM_CDM_HOST_FILE_H_
#define WVCDM_CDM_CDM_HOST_FILE_H_

#include "file_store.h"
#include "content_decryption_module.h"

namespace wvcdm {

class IFileFactory;

class File::Impl {
 public:
  explicit Impl(cdm::Host* const host) : host_(host) {}

  static void RegisterFileFactory(IFileFactory* factory) {
    factory_ = factory;
  }

  virtual bool Exists(const std::string& name);
  virtual bool Open(const std::string& name);
  virtual bool Close();
  virtual bool Remove(const std::string& name);
  virtual ssize_t Read(char* buffer, size_t bytes);
  virtual ssize_t Write(const char* buffer, size_t bytes);
  virtual ssize_t FileSize(const std::string& name);

 private:
  static IFileFactory* factory_;
  friend class File;

  cdm::Host* const host_;
  std::string fname_;
};

class IFileFactory {
 protected:
  IFileFactory() {
    File::Impl::RegisterFileFactory(this);
  }

  virtual ~IFileFactory() {}

 public:
  virtual File::Impl* NewFileImpl() = 0;
};

} // namespace wvcdm

#endif // WVCDM_CDM_CDM_HOST_FILE_H_