/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_FilePickerParent_h
#define mozilla_dom_FilePickerParent_h

#include "nsIEventTarget.h"
#include "nsIFilePicker.h"
#include "nsCOMArray.h"
#include "nsThreadUtils.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/PFilePickerParent.h"

class nsIFile;

namespace mozilla {
namespace dom {

class FilePickerParent : public PFilePickerParent
{
 public:
  FilePickerParent(const nsString& aTitle,
                   const int16_t& aMode)
  : mTitle(aTitle)
  , mMode(aMode)
  {}

 private:
  virtual ~FilePickerParent();

 public:
  NS_INLINE_DECL_REFCOUNTING(FilePickerParent)

  void Done(int16_t aResult);

  struct BlobImplOrString
  {
    RefPtr<BlobImpl> mBlobImpl;
    nsString mDirectoryPath;

    enum {
      eBlobImpl,
      eDirectoryPath
    } mType;
  };

  void SendFilesOrDirectories(const nsTArray<BlobImplOrString>& aData);

  virtual bool RecvOpen(const int16_t& aSelectedType,
                        const bool& aAddToRecentDocs,
                        const nsString& aDefaultFile,
                        const nsString& aDefaultExtension,
                        InfallibleTArray<nsString>&& aFilters,
                        InfallibleTArray<nsString>&& aFilterNames,
                        const nsString& aDisplayDirectory,
                        const nsString& aOkButtonLabel) override;

  virtual void ActorDestroy(ActorDestroyReason aWhy) override;

  class FilePickerShownCallback : public nsIFilePickerShownCallback
  {
  public:
    explicit FilePickerShownCallback(FilePickerParent* aFilePickerParent)
      : mFilePickerParent(aFilePickerParent)
    { }

    NS_DECL_ISUPPORTS
    NS_DECL_NSIFILEPICKERSHOWNCALLBACK

    void Destroy();

  private:
    virtual ~FilePickerShownCallback() {}
    RefPtr<FilePickerParent> mFilePickerParent;
  };

 private:
  bool CreateFilePicker();

  // This runnable is used to do some I/O operation on a separate thread.
  class IORunnable : public Runnable
  {
    RefPtr<FilePickerParent> mFilePickerParent;
    nsTArray<nsCOMPtr<nsIFile>> mFiles;
    nsTArray<BlobImplOrString> mResults;
    nsCOMPtr<nsIEventTarget> mEventTarget;
    bool mIsDirectory;

  public:
    IORunnable(FilePickerParent *aFPParent,
               nsTArray<nsCOMPtr<nsIFile>>& aFiles,
               bool aIsDirectory);

    bool Dispatch();
    NS_IMETHOD Run();
    void Destroy();
  };

  RefPtr<IORunnable> mRunnable;
  RefPtr<FilePickerShownCallback> mCallback;
  nsCOMPtr<nsIFilePicker> mFilePicker;

  nsString mTitle;
  int16_t mMode;
  int16_t mResult;
};

} // namespace dom
} // namespace mozilla

#endif // mozilla_dom_FilePickerParent_h
