/*=========================================================================

  Program:   ParaView
  Module:    vtkPVMacFileInformationHelper.mm

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "vtkPVMacFileInformationHelper.h"

#include "vtkObjectFactory.h"

#import <Foundation/Foundation.h>

#include <string>
#include <vector>

//-----------------------------------------------------------------------------
vtkStandardNewMacro(vtkPVMacFileInformationHelper);

//-----------------------------------------------------------------------------
vtkPVMacFileInformationHelper::vtkPVMacFileInformationHelper() = default;

//-----------------------------------------------------------------------------
vtkPVMacFileInformationHelper::~vtkPVMacFileInformationHelper() = default;

//-----------------------------------------------------------------------------
std::string vtkPVMacFileInformationHelper::GetHomeDirectory()
{
  NSString* homeDirectory = NSHomeDirectory();
  return std::string([homeDirectory UTF8String]);
}

//-----------------------------------------------------------------------------
std::vector<vtkPVMacFileInformationHelper::NamePath>
vtkPVMacFileInformationHelper::GetMountedVolumes()
{
  std::vector<vtkPVMacFileInformationHelper::NamePath> volumes;
  NSArray* urls = [[NSFileManager defaultManager]
    mountedVolumeURLsIncludingResourceValuesForKeys:@[ NSURLVolumeNameKey ]
                                            options:0];

  if (!urls)
  {
    return volumes;
  }

  for (NSURL* url in urls)
  {
    if (!url)
    {
      continue;
    }

    NSString* path = [url path];
    if (!path || ![path UTF8String])
    {
      continue;
    }
    std::string pathStr([path UTF8String]);
    NSString* name = nil;
    [url getResourceValue:&name forKey:NSURLLocalizedNameKey error:NULL];
    if (![name UTF8String])
    {
      continue;
    }
    std::string nameStr([name UTF8String]);
    volumes.push_back(std::make_pair(nameStr, pathStr));
  }

  return volumes;
}

//-----------------------------------------------------------------------------
std::string vtkPVMacFileInformationHelper::GetBundleDirectory()
{
  NSBundle* bundle = [NSBundle mainBundle];
  NSString* path = [bundle bundlePath];
  std::string pathStr([path UTF8String]);

  return pathStr;
}

//-----------------------------------------------------------------------------
namespace
{
std::string GetUserDomainDirectory(NSSearchPathDirectory userDirectory)
{
  std::string directory;
  NSArray* urls = [[NSFileManager defaultManager] URLsForDirectory:userDirectory
                                                         inDomains:NSUserDomainMask];
  for (NSURL* url in urls)
  {
    NSString* path = [url path];

    // Double check that directory exists
    BOOL isDirectory = false;
    BOOL exists = [[NSFileManager defaultManager] fileExistsAtPath:path isDirectory:&isDirectory];

    if (exists && isDirectory)
    {
      directory = [path UTF8String];

      // There should be at most one such user directory, so exit early
      break;
    }
  }

  return directory;
}

} // end anonymous namespace

//-----------------------------------------------------------------------------
std::string vtkPVMacFileInformationHelper::GetDesktopDirectory()
{
  return GetUserDomainDirectory(NSDesktopDirectory);
}

//-----------------------------------------------------------------------------
std::string vtkPVMacFileInformationHelper::GetDocumentsDirectory()
{
  return GetUserDomainDirectory(NSDocumentDirectory);
}

//-----------------------------------------------------------------------------
std::string vtkPVMacFileInformationHelper::GetDownloadsDirectory()
{
  return GetUserDomainDirectory(NSDownloadsDirectory);
}

//-----------------------------------------------------------------------------
void vtkPVMacFileInformationHelper::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}
