// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "atom/common/platform_util.h"

#import <Carbon/Carbon.h>
#import <Cocoa/Cocoa.h>

#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/mac/foundation_util.h"
#include "base/mac/mac_logging.h"
#include "base/mac/scoped_aedesc.h"
#include "base/strings/stringprintf.h"
#include "base/strings/sys_string_conversions.h"
#include "net/base/mac/url_conversions.h"
#include "url/gurl.h"

namespace {

std::string MessageForOSStatus(OSStatus status, const char* default_message) {
  switch (status) {
    case kLSAppInTrashErr:
      return "The application cannot be run because it is inside a Trash "
             "folder.";
    case kLSUnknownErr:
      return "An unknown error has occurred.";
    case kLSNotAnApplicationErr:
      return "The item to be registered is not an application.";
    case kLSNotInitializedErr:
      return "Formerly returned by LSInit on initialization failure; "
             "no longer used.";
    case kLSDataUnavailableErr:
      return "Data of the desired type is not available (for example, there is "
             "no kind string).";
    case kLSApplicationNotFoundErr:
      return "No application in the Launch Services database matches the input "
             "criteria.";
    case kLSDataErr:
      return "Data is structured improperly (for example, an item’s "
             "information property list is malformed). Not used in macOS 10.4.";
    case kLSLaunchInProgressErr:
      return "A launch of the application is already in progress.";
    case kLSServerCommunicationErr:
      return "There is a problem communicating with the server process that "
             "maintains the Launch Services database.";
    case kLSCannotSetInfoErr:
      return "The filename extension to be hidden cannot be hidden.";
    case kLSIncompatibleSystemVersionErr:
      return "The application to be launched cannot run on the current Mac OS "
             "version.";
    case kLSNoLaunchPermissionErr:
      return "The user does not have permission to launch the application (on a"
             "managed network).";
    case kLSNoExecutableErr:
      return "The executable file is missing or has an unusable format.";
    case kLSNoClassicEnvironmentErr:
      return "The Classic emulation environment was required but is not "
             "available.";
    case kLSMultipleSessionsNotSupportedErr:
      return "The application to be launched cannot run simultaneously in two "
             "different user sessions.";
    default:
      return base::StringPrintf("%s (%d)", default_message, status);
  }
}

// This may be called from a global dispatch queue, the methods used here are
// thread safe, including LSGetApplicationForURL (> 10.2) and
// NSWorkspace#openURLs.
std::string OpenURL(NSURL* ns_url, bool activate) {
  CFURLRef openingApp = nullptr;
  OSStatus status = LSGetApplicationForURL(base::mac::NSToCFCast(ns_url),
                                           kLSRolesAll,
                                           nullptr,
                                           &openingApp);
  if (status != noErr)
    return MessageForOSStatus(status, "Failed to open");

  CFRelease(openingApp);  // NOT A BUG; LSGetApplicationForURL retains for us

  NSUInteger launchOptions = NSWorkspaceLaunchDefault;
  if (!activate)
    launchOptions |= NSWorkspaceLaunchWithoutActivation;

  bool opened = [[NSWorkspace sharedWorkspace]
                            openURLs:@[ns_url]
             withAppBundleIdentifier:nil
                             options:launchOptions
      additionalEventParamDescriptor:nil
                   launchIdentifiers:nil];
  if (!opened)
    return "Failed to open URL";

  return "";
}

}  // namespace

namespace platform_util {

bool ShowItemInFolder(const base::FilePath& path) {
  // The API only takes absolute path.
  base::FilePath full_path =
      path.IsAbsolute() ? path : base::MakeAbsoluteFilePath(path);

  DCHECK([NSThread isMainThread]);
  NSString* path_string = base::SysUTF8ToNSString(full_path.value());
  if (!path_string || ![[NSWorkspace sharedWorkspace] selectFile:path_string
                                        inFileViewerRootedAtPath:@""]) {
    LOG(WARNING) << "NSWorkspace failed to select file " << full_path.value();
    return false;
  }
  return true;
}

bool OpenItem(const base::FilePath& full_path) {
  DCHECK([NSThread isMainThread]);
  NSString* path_string = base::SysUTF8ToNSString(full_path.value());
  if (!path_string)
    return false;

  NSURL* url = [NSURL fileURLWithPath:path_string];
  if (!url)
    return false;

  const NSWorkspaceLaunchOptions launch_options =
      NSWorkspaceLaunchAsync | NSWorkspaceLaunchWithErrorPresentation;
  return [[NSWorkspace sharedWorkspace] openURLs:@[ url ]
                  withAppBundleIdentifier:nil
                                  options:launch_options
           additionalEventParamDescriptor:nil
                        launchIdentifiers:NULL];
}

bool OpenExternal(const GURL& url, bool activate) {
  DCHECK([NSThread isMainThread]);
  NSURL* ns_url = net::NSURLWithGURL(url);
  if (ns_url)
    return OpenURL(ns_url, activate).empty();
  return false;
}

void OpenExternal(const GURL& url, bool activate,
                  const OpenExternalCallback& callback) {
  NSURL* ns_url = net::NSURLWithGURL(url);
  if (!ns_url) {
    callback.Run("Invalid URL");
    return;
  }

  __block OpenExternalCallback c = callback;
  dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    __block std::string error = OpenURL(ns_url, activate);
    dispatch_async(dispatch_get_main_queue(), ^{
      c.Run(error);
    });
  });
}

bool MoveItemToTrash(const base::FilePath& full_path) {
  NSString* path_string = base::SysUTF8ToNSString(full_path.value());
  BOOL status = [[NSFileManager defaultManager]
                trashItemAtURL:[NSURL fileURLWithPath:path_string]
                resultingItemURL:nil
                error:nil];
  if (!path_string || !status)
    LOG(WARNING) << "NSWorkspace failed to move file " << full_path.value()
                 << " to trash";
  return status;
}

void Beep() {
  NSBeep();
}

}  // namespace platform_util
