/******************************************************************************
 * Copyright (c) 2005-2019 Transmission authors and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#import <Foundation/Foundation.h>

#import <Sparkle/Sparkle.h>

#include <libtransmission/transmission.h>
#include <libtransmission/utils.h>

#import "VDKQueue.h"

#import "PrefsController.h"
#import "BlocklistDownloaderViewController.h"
#import "BlocklistScheduler.h"
#import "Controller.h"
#import "PortChecker.h"
#import "BonjourController.h"
#import "NSApplicationAdditions.h"
#import "NSStringAdditions.h"

#define DOWNLOAD_FOLDER 0
#define DOWNLOAD_TORRENT 2

#define RPC_IP_ADD_TAG 0
#define RPC_IP_REMOVE_TAG 1

#define TOOLBAR_GENERAL @"TOOLBAR_GENERAL"
#define TOOLBAR_TRANSFERS @"TOOLBAR_TRANSFERS"
#define TOOLBAR_GROUPS @"TOOLBAR_GROUPS"
#define TOOLBAR_BANDWIDTH @"TOOLBAR_BANDWIDTH"
#define TOOLBAR_PEERS @"TOOLBAR_PEERS"
#define TOOLBAR_NETWORK @"TOOLBAR_NETWORK"
#define TOOLBAR_REMOTE @"TOOLBAR_REMOTE"

#define RPC_KEYCHAIN_SERVICE "Transmission:Remote"
#define RPC_KEYCHAIN_NAME "Remote"

#define WEBUI_URL @"http://localhost:%ld/"

@interface PrefsController (Private)

- (void)setPrefView:(id)sender;

- (void)setKeychainPassword:(char const*)password forService:(char const*)service username:(char const*)username;

@end

@implementation PrefsController

- (instancetype)initWithHandle:(tr_session*)handle
{
    if ((self = [super initWithWindowNibName:@"PrefsWindow"]))
    {
        fHandle = handle;

        fDefaults = NSUserDefaults.standardUserDefaults;

        //check for old version download location (before 1.1)
        NSString* choice;
        if ((choice = [fDefaults stringForKey:@"DownloadChoice"]))
        {
            [fDefaults setBool:[choice isEqualToString:@"Constant"] forKey:@"DownloadLocationConstant"];
            [fDefaults setBool:YES forKey:@"DownloadAsk"];

            [fDefaults removeObjectForKey:@"DownloadChoice"];
        }

        //check for old version blocklist (before 2.12)
        NSDate* blocklistDate;
        if ((blocklistDate = [fDefaults objectForKey:@"BlocklistLastUpdate"]))
        {
            [fDefaults setObject:blocklistDate forKey:@"BlocklistNewLastUpdateSuccess"];
            [fDefaults setObject:blocklistDate forKey:@"BlocklistNewLastUpdate"];
            [fDefaults removeObjectForKey:@"BlocklistLastUpdate"];

            NSURL* blocklistDir = [[NSFileManager.defaultManager URLsForDirectory:NSApplicationDirectory inDomains:NSUserDomainMask][0]
                URLByAppendingPathComponent:@"Transmission/blocklists/"];
            [NSFileManager.defaultManager moveItemAtURL:[blocklistDir URLByAppendingPathComponent:@"level1.bin"]
                                                  toURL:[blocklistDir URLByAppendingPathComponent:@DEFAULT_BLOCKLIST_FILENAME]
                                                  error:nil];
        }

        //save a new random port
        if ([fDefaults boolForKey:@"RandomPort"])
        {
            [fDefaults setInteger:tr_sessionGetPeerPort(fHandle) forKey:@"BindPort"];
        }

        //set auto import
        NSString* autoPath;
        VDKQueue* x = [(Controller*)[NSApp delegate] fileWatcherQueue];
        if ([fDefaults boolForKey:@"AutoImport"] && (autoPath = [fDefaults stringForKey:@"AutoImportDirectory"]))
        {
            [((Controller*)NSApp.delegate).fileWatcherQueue addPath:autoPath.stringByExpandingTildeInPath
                                                     notifyingAbout:VDKQueueNotifyAboutWrite];
        }

        //set special-handling of magnet link add window checkbox
        [self updateShowAddMagnetWindowField];

        //set blocklist scheduler
        [BlocklistScheduler.scheduler updateSchedule];

        //set encryption
        [self setEncryptionMode:nil];

        //update rpc whitelist
        [self updateRPCPassword];

        fRPCWhitelistArray = [[fDefaults arrayForKey:@"RPCWhitelist"] mutableCopy];
        if (!fRPCWhitelistArray)
        {
            fRPCWhitelistArray = [NSMutableArray arrayWithObject:@"127.0.0.1"];
        }
        [self updateRPCWhitelist];

        //reset old Sparkle settings from previous versions
        [fDefaults removeObjectForKey:@"SUScheduledCheckInterval"];
        if ([fDefaults objectForKey:@"CheckForUpdates"])
        {
            [[SUUpdater sharedUpdater] setAutomaticallyChecksForUpdates:[fDefaults boolForKey:@"CheckForUpdates"]];
            [fDefaults removeObjectForKey:@"CheckForUpdates"];
        }

        [self setAutoUpdateToBeta:nil];
    }

    return self;
}

- (void)dealloc
{
    [NSNotificationCenter.defaultCenter removeObserver:self];

    [fPortStatusTimer invalidate];
    if (fPortChecker)
    {
        [fPortChecker cancelProbe];
    }
}

- (void)awakeFromNib
{
    fHasLoaded = YES;

    self.window.restorationClass = [self class];

    NSToolbar* toolbar = [[NSToolbar alloc] initWithIdentifier:@"Preferences Toolbar"];
    toolbar.delegate = self;
    toolbar.allowsUserCustomization = NO;
    toolbar.displayMode = NSToolbarDisplayModeIconAndLabel;
    toolbar.sizeMode = NSToolbarSizeModeRegular;
    toolbar.selectedItemIdentifier = TOOLBAR_GENERAL;
    self.window.toolbar = toolbar;

    [self setPrefView:nil];

    //set download folder
    [fFolderPopUp selectItemAtIndex:[fDefaults boolForKey:@"DownloadLocationConstant"] ? DOWNLOAD_FOLDER : DOWNLOAD_TORRENT];

    //set stop ratio
    fRatioStopField.floatValue = [fDefaults floatForKey:@"RatioLimit"];

    //set idle seeding minutes
    fIdleStopField.integerValue = [fDefaults integerForKey:@"IdleLimitMinutes"];

    //set limits
    [self updateLimitFields];

    //set speed limit
    fSpeedLimitUploadField.intValue = [fDefaults integerForKey:@"SpeedLimitUploadLimit"];
    fSpeedLimitDownloadField.intValue = [fDefaults integerForKey:@"SpeedLimitDownloadLimit"];

    //set port
    fPortField.intValue = [fDefaults integerForKey:@"BindPort"];
    fNatStatus = -1;

    [self updatePortStatus];
    fPortStatusTimer = [NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(updatePortStatus) userInfo:nil
                                                       repeats:YES];

    //set peer connections
    fPeersGlobalField.intValue = [fDefaults integerForKey:@"PeersTotal"];
    fPeersTorrentField.intValue = [fDefaults integerForKey:@"PeersTorrent"];

    //set queue values
    fQueueDownloadField.intValue = [fDefaults integerForKey:@"QueueDownloadNumber"];
    fQueueSeedField.intValue = [fDefaults integerForKey:@"QueueSeedNumber"];
    fStalledField.intValue = [fDefaults integerForKey:@"StalledMinutes"];

    //set blocklist
    NSString* blocklistURL = [fDefaults stringForKey:@"BlocklistURL"];
    if (blocklistURL)
    {
        fBlocklistURLField.stringValue = blocklistURL;
    }

    [self updateBlocklistButton];
    [self updateBlocklistFields];

    [NSNotificationCenter.defaultCenter addObserver:self selector:@selector(updateLimitFields)
                                               name:@"UpdateSpeedLimitValuesOutsidePrefs"
                                             object:nil];

    [NSNotificationCenter.defaultCenter addObserver:self selector:@selector(updateRatioStopField)
                                               name:@"UpdateRatioStopValueOutsidePrefs"
                                             object:nil];

    [NSNotificationCenter.defaultCenter addObserver:self selector:@selector(updateLimitStopField)
                                               name:@"UpdateIdleStopValueOutsidePrefs"
                                             object:nil];

    [NSNotificationCenter.defaultCenter addObserver:self selector:@selector(updateBlocklistFields) name:@"BlocklistUpdated"
                                             object:nil];

    [NSNotificationCenter.defaultCenter addObserver:self selector:@selector(updateBlocklistURLField)
                                               name:NSControlTextDidChangeNotification
                                             object:fBlocklistURLField];

    //set rpc port
    fRPCPortField.intValue = [fDefaults integerForKey:@"RPCPort"];

    //set rpc password
    if (fRPCPassword)
    {
        fRPCPasswordField.stringValue = fRPCPassword;
    }
}

- (NSToolbarItem*)toolbar:(NSToolbar*)toolbar itemForItemIdentifier:(NSString*)ident willBeInsertedIntoToolbar:(BOOL)flag
{
    NSToolbarItem* item = [[NSToolbarItem alloc] initWithItemIdentifier:ident];

    if ([ident isEqualToString:TOOLBAR_GENERAL])
    {
        item.label = NSLocalizedString(@"General", "Preferences -> toolbar item title");
        if (@available(macOS 11.0, *))
        {
            item.image = [NSImage imageWithSystemSymbolName:@"gearshape" accessibilityDescription:nil];
        }
        else
        {
            item.image = [NSImage imageNamed:NSImageNamePreferencesGeneral];
        }
        item.target = self;
        item.action = @selector(setPrefView:);
        item.autovalidates = NO;
    }
    else if ([ident isEqualToString:TOOLBAR_TRANSFERS])
    {
        item.label = NSLocalizedString(@"Transfers", "Preferences -> toolbar item title");
        if (@available(macOS 11.0, *))
        {
            item.image = [NSImage imageWithSystemSymbolName:@"arrow.up.arrow.down" accessibilityDescription:nil];
        }
        else
        {
            item.image = [NSImage imageNamed:@"Transfers"];
        }
        item.target = self;
        item.action = @selector(setPrefView:);
        item.autovalidates = NO;
    }
    else if ([ident isEqualToString:TOOLBAR_GROUPS])
    {
        item.label = NSLocalizedString(@"Groups", "Preferences -> toolbar item title");
        if (@available(macOS 11.0, *))
        {
            item.image = [NSImage imageWithSystemSymbolName:@"pin" accessibilityDescription:nil];
        }
        else
        {
            item.image = [NSImage imageNamed:@"Groups"];
        }
        item.target = self;
        item.action = @selector(setPrefView:);
        item.autovalidates = NO;
    }
    else if ([ident isEqualToString:TOOLBAR_BANDWIDTH])
    {
        item.label = NSLocalizedString(@"Bandwidth", "Preferences -> toolbar item title");
        if (@available(macOS 11.0, *))
        {
            item.image = [NSImage imageWithSystemSymbolName:@"speedometer" accessibilityDescription:nil];
        }
        else
        {
            item.image = [NSImage imageNamed:@"Bandwidth"];
        }
        item.target = self;
        item.action = @selector(setPrefView:);
        item.autovalidates = NO;
    }
    else if ([ident isEqualToString:TOOLBAR_PEERS])
    {
        item.label = NSLocalizedString(@"Peers", "Preferences -> toolbar item title");
        if (@available(macOS 11.0, *))
        {
            item.image = [NSImage imageWithSystemSymbolName:@"person.2" accessibilityDescription:nil];
        }
        else
        {
            item.image = [NSImage imageNamed:NSImageNameUserGroup];
        }
        item.target = self;
        item.action = @selector(setPrefView:);
        item.autovalidates = NO;
    }
    else if ([ident isEqualToString:TOOLBAR_NETWORK])
    {
        item.label = NSLocalizedString(@"Network", "Preferences -> toolbar item title");
        if (@available(macOS 11.0, *))
        {
            item.image = [NSImage imageWithSystemSymbolName:@"network" accessibilityDescription:nil];
        }
        else
        {
            item.image = [NSImage imageNamed:NSImageNameNetwork];
        }
        item.target = self;
        item.action = @selector(setPrefView:);
        item.autovalidates = NO;
    }
    else if ([ident isEqualToString:TOOLBAR_REMOTE])
    {
        item.label = NSLocalizedString(@"Remote", "Preferences -> toolbar item title");
        if (@available(macOS 11.0, *))
        {
            item.image = [NSImage imageWithSystemSymbolName:@"antenna.radiowaves.left.and.right" accessibilityDescription:nil];
        }
        else
        {
            item.image = [NSImage imageNamed:@"Remote"];
        }
        item.target = self;
        item.action = @selector(setPrefView:);
        item.autovalidates = NO;
    }
    else
    {
        return nil;
    }

    return item;
}

- (NSArray*)toolbarAllowedItemIdentifiers:(NSToolbar*)toolbar
{
    return @[
        TOOLBAR_GENERAL,
        TOOLBAR_TRANSFERS,
        TOOLBAR_GROUPS,
        TOOLBAR_BANDWIDTH,
        TOOLBAR_PEERS,
        TOOLBAR_NETWORK,
        TOOLBAR_REMOTE
    ];
}

- (NSArray*)toolbarSelectableItemIdentifiers:(NSToolbar*)toolbar
{
    return [self toolbarAllowedItemIdentifiers:toolbar];
}

- (NSArray*)toolbarDefaultItemIdentifiers:(NSToolbar*)toolbar
{
    return [self toolbarAllowedItemIdentifiers:toolbar];
}

+ (void)restoreWindowWithIdentifier:(NSString*)identifier
                              state:(NSCoder*)state
                  completionHandler:(void (^)(NSWindow*, NSError*))completionHandler
{
    NSWindow* window = ((Controller*)NSApp.delegate).prefsController.window;
    completionHandler(window, nil);
}

//for a beta release, always use the beta appcast
#if defined(TR_BETA_RELEASE)
#define SPARKLE_TAG YES
#else
#define SPARKLE_TAG [fDefaults boolForKey:@"AutoUpdateBeta"]
#endif
- (void)setAutoUpdateToBeta:(id)sender
{
    // TODO: Support beta releases (if/when necessary)
}

- (void)setPort:(id)sender
{
    tr_port const port = [sender intValue];
    [fDefaults setInteger:port forKey:@"BindPort"];
    tr_sessionSetPeerPort(fHandle, port);

    fPeerPort = -1;
    [self updatePortStatus];
}

- (void)randomPort:(id)sender
{
    tr_port const port = tr_sessionSetPeerPortRandom(fHandle);
    [fDefaults setInteger:port forKey:@"BindPort"];
    fPortField.intValue = port;

    fPeerPort = -1;
    [self updatePortStatus];
}

- (void)setRandomPortOnStart:(id)sender
{
    tr_sessionSetPeerPortRandomOnStart(fHandle, ((NSButton*)sender).state == NSOnState);
}

- (void)setNat:(id)sender
{
    tr_sessionSetPortForwardingEnabled(fHandle, [fDefaults boolForKey:@"NatTraversal"]);

    fNatStatus = -1;
    [self updatePortStatus];
}

- (void)updatePortStatus
{
    tr_port_forwarding const fwd = tr_sessionGetPortForwarding(fHandle);
    int const port = tr_sessionGetPeerPort(fHandle);
    BOOL natStatusChanged = (fNatStatus != fwd);
    BOOL peerPortChanged = (fPeerPort != port);

    if (natStatusChanged || peerPortChanged)
    {
        fNatStatus = fwd;
        fPeerPort = port;

        fPortStatusField.stringValue = @"";
        fPortStatusImage.image = nil;
        [fPortStatusProgress startAnimation:self];

        if (fPortChecker)
        {
            [fPortChecker cancelProbe];
        }
        BOOL delay = natStatusChanged || tr_sessionIsPortForwardingEnabled(fHandle);
        fPortChecker = [[PortChecker alloc] initForPort:fPeerPort delay:delay withDelegate:self];
    }
}

- (void)portCheckerDidFinishProbing:(PortChecker*)portChecker
{
    [fPortStatusProgress stopAnimation:self];
    switch (fPortChecker.status)
    {
    case PORT_STATUS_OPEN:
        fPortStatusField.stringValue = NSLocalizedString(@"Port is open", "Preferences -> Network -> port status");
        fPortStatusImage.image = [NSImage imageNamed:NSImageNameStatusAvailable];
        break;
    case PORT_STATUS_CLOSED:
        fPortStatusField.stringValue = NSLocalizedString(@"Port is closed", "Preferences -> Network -> port status");
        fPortStatusImage.image = [NSImage imageNamed:NSImageNameStatusUnavailable];
        break;
    case PORT_STATUS_ERROR:
        fPortStatusField.stringValue = NSLocalizedString(@"Port check site is down", "Preferences -> Network -> port status");
        fPortStatusImage.image = [NSImage imageNamed:NSImageNameStatusPartiallyAvailable];
        break;
    default:
        NSAssert1(NO, @"Port checker returned invalid status: %d", fPortChecker.status);
        break;
    }
    fPortChecker = nil;
}

- (NSArray*)sounds
{
    NSMutableArray* sounds = [NSMutableArray array];

    NSArray* directories = NSSearchPathForDirectoriesInDomains(NSAllLibrariesDirectory, NSUserDomainMask | NSLocalDomainMask | NSSystemDomainMask, YES);

    for (__strong NSString* directory in directories)
    {
        directory = [directory stringByAppendingPathComponent:@"Sounds"];

        BOOL isDirectory;
        if ([NSFileManager.defaultManager fileExistsAtPath:directory isDirectory:&isDirectory] && isDirectory)
        {
            NSArray* directoryContents = [NSFileManager.defaultManager contentsOfDirectoryAtPath:directory error:NULL];
            for (__strong NSString* sound in directoryContents)
            {
                sound = sound.stringByDeletingPathExtension;
                if ([NSSound soundNamed:sound])
                {
                    [sounds addObject:sound];
                }
            }
        }
    }

    return sounds;
}

- (void)setSound:(id)sender
{
    //play sound when selecting
    NSSound* sound;
    if ((sound = [NSSound soundNamed:[sender titleOfSelectedItem]]))
    {
        [sound play];
    }
}

- (void)setUTP:(id)sender
{
    tr_sessionSetUTPEnabled(fHandle, [fDefaults boolForKey:@"UTPGlobal"]);
}

- (void)setPeersGlobal:(id)sender
{
    int const count = [sender intValue];
    [fDefaults setInteger:count forKey:@"PeersTotal"];
    tr_sessionSetPeerLimit(fHandle, count);
}

- (void)setPeersTorrent:(id)sender
{
    int const count = [sender intValue];
    [fDefaults setInteger:count forKey:@"PeersTorrent"];
    tr_sessionSetPeerLimitPerTorrent(fHandle, count);
}

- (void)setPEX:(id)sender
{
    tr_sessionSetPexEnabled(fHandle, [fDefaults boolForKey:@"PEXGlobal"]);
}

- (void)setDHT:(id)sender
{
    tr_sessionSetDHTEnabled(fHandle, [fDefaults boolForKey:@"DHTGlobal"]);
}

- (void)setLPD:(id)sender
{
    tr_sessionSetLPDEnabled(fHandle, [fDefaults boolForKey:@"LocalPeerDiscoveryGlobal"]);
}

- (void)setEncryptionMode:(id)sender
{
    tr_encryption_mode const mode = [fDefaults boolForKey:@"EncryptionPrefer"] ?
        ([fDefaults boolForKey:@"EncryptionRequire"] ? TR_ENCRYPTION_REQUIRED : TR_ENCRYPTION_PREFERRED) :
        TR_CLEAR_PREFERRED;
    tr_sessionSetEncryption(fHandle, mode);
}

- (void)setBlocklistEnabled:(id)sender
{
    tr_blocklistSetEnabled(fHandle, [fDefaults boolForKey:@"BlocklistNew"]);

    [BlocklistScheduler.scheduler updateSchedule];

    [self updateBlocklistButton];
}

- (void)updateBlocklist:(id)sender
{
    [BlocklistDownloaderViewController downloadWithPrefsController:self];
}

- (void)setBlocklistAutoUpdate:(id)sender
{
    [BlocklistScheduler.scheduler updateSchedule];
}

- (void)updateBlocklistFields
{
    BOOL const exists = tr_blocklistExists(fHandle);

    if (exists)
    {
        NSString* countString = [NSString formattedUInteger:tr_blocklistGetRuleCount(fHandle)];
        fBlocklistMessageField.stringValue = [NSString
            stringWithFormat:NSLocalizedString(@"%@ IP address rules in list", "Prefs -> blocklist -> message"), countString];
    }
    else
    {
        fBlocklistMessageField.stringValue = NSLocalizedString(@"A blocklist must first be downloaded", "Prefs -> blocklist -> message");
    }

    NSString* updatedDateString;
    if (exists)
    {
        NSDate* updatedDate = [fDefaults objectForKey:@"BlocklistNewLastUpdateSuccess"];

        if (updatedDate)
        {
            updatedDateString = [NSDateFormatter localizedStringFromDate:updatedDate dateStyle:NSDateFormatterFullStyle
                                                               timeStyle:NSDateFormatterShortStyle];
        }
        else
        {
            updatedDateString = NSLocalizedString(@"N/A", "Prefs -> blocklist -> message");
        }
    }
    else
    {
        updatedDateString = NSLocalizedString(@"Never", "Prefs -> blocklist -> message");
    }

    fBlocklistDateField.stringValue = [NSString
        stringWithFormat:@"%@: %@", NSLocalizedString(@"Last updated", "Prefs -> blocklist -> message"), updatedDateString];
}

- (void)updateBlocklistURLField
{
    NSString* blocklistString = fBlocklistURLField.stringValue;

    [fDefaults setObject:blocklistString forKey:@"BlocklistURL"];
    tr_blocklistSetURL(fHandle, blocklistString.UTF8String);

    [self updateBlocklistButton];
}

- (void)updateBlocklistButton
{
    NSString* blocklistString = [fDefaults objectForKey:@"BlocklistURL"];
    BOOL const enable = (blocklistString && ![blocklistString isEqualToString:@""]) && [fDefaults boolForKey:@"BlocklistNew"];
    fBlocklistButton.enabled = enable;
}

- (void)setAutoStartDownloads:(id)sender
{
    tr_sessionSetPaused(fHandle, ![fDefaults boolForKey:@"AutoStartDownload"]);
}

- (void)applySpeedSettings:(id)sender
{
    tr_sessionLimitSpeed(fHandle, TR_UP, [fDefaults boolForKey:@"CheckUpload"]);
    tr_sessionSetSpeedLimit_KBps(fHandle, TR_UP, [fDefaults integerForKey:@"UploadLimit"]);

    tr_sessionLimitSpeed(fHandle, TR_DOWN, [fDefaults boolForKey:@"CheckDownload"]);
    tr_sessionSetSpeedLimit_KBps(fHandle, TR_DOWN, [fDefaults integerForKey:@"DownloadLimit"]);

    [NSNotificationCenter.defaultCenter postNotificationName:@"SpeedLimitUpdate" object:nil];
}

- (void)applyAltSpeedSettings
{
    tr_sessionSetAltSpeed_KBps(fHandle, TR_UP, [fDefaults integerForKey:@"SpeedLimitUploadLimit"]);
    tr_sessionSetAltSpeed_KBps(fHandle, TR_DOWN, [fDefaults integerForKey:@"SpeedLimitDownloadLimit"]);

    [NSNotificationCenter.defaultCenter postNotificationName:@"SpeedLimitUpdate" object:nil];
}

- (void)applyRatioSetting:(id)sender
{
    tr_sessionSetRatioLimited(fHandle, [fDefaults boolForKey:@"RatioCheck"]);
    tr_sessionSetRatioLimit(fHandle, [fDefaults floatForKey:@"RatioLimit"]);

    //reload main table for seeding progress
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateUI" object:nil];

    //reload global settings in inspector
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateGlobalOptions" object:nil];
}

- (void)setRatioStop:(id)sender
{
    [fDefaults setFloat:[sender floatValue] forKey:@"RatioLimit"];

    [self applyRatioSetting:nil];
}

- (void)updateRatioStopField
{
    if (fHasLoaded)
    {
        fRatioStopField.floatValue = [fDefaults floatForKey:@"RatioLimit"];
    }
}

- (void)updateRatioStopFieldOld
{
    [self updateRatioStopField];

    [self applyRatioSetting:nil];
}

- (void)applyIdleStopSetting:(id)sender
{
    tr_sessionSetIdleLimited(fHandle, [fDefaults boolForKey:@"IdleLimitCheck"]);
    tr_sessionSetIdleLimit(fHandle, [fDefaults integerForKey:@"IdleLimitMinutes"]);

    //reload main table for remaining seeding time
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateUI" object:nil];

    //reload global settings in inspector
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateGlobalOptions" object:nil];
}

- (void)setIdleStop:(id)sender
{
    [fDefaults setInteger:[sender integerValue] forKey:@"IdleLimitMinutes"];

    [self applyIdleStopSetting:nil];
}

- (void)updateLimitStopField
{
    if (fHasLoaded)
    {
        fIdleStopField.integerValue = [fDefaults integerForKey:@"IdleLimitMinutes"];
    }
}

- (void)updateLimitFields
{
    if (!fHasLoaded)
    {
        return;
    }

    fUploadField.intValue = [fDefaults integerForKey:@"UploadLimit"];
    fDownloadField.intValue = [fDefaults integerForKey:@"DownloadLimit"];
}

- (void)setGlobalLimit:(id)sender
{
    [fDefaults setInteger:[sender intValue] forKey:sender == fUploadField ? @"UploadLimit" : @"DownloadLimit"];
    [self applySpeedSettings:self];
}

- (void)setSpeedLimit:(id)sender
{
    [fDefaults setInteger:[sender intValue]
                   forKey:sender == fSpeedLimitUploadField ? @"SpeedLimitUploadLimit" : @"SpeedLimitDownloadLimit"];
    [self applyAltSpeedSettings];
}

- (void)setAutoSpeedLimit:(id)sender
{
    tr_sessionUseAltSpeedTime(fHandle, [fDefaults boolForKey:@"SpeedLimitAuto"]);
}

- (void)setAutoSpeedLimitTime:(id)sender
{
    tr_sessionSetAltSpeedBegin(fHandle, [PrefsController dateToTimeSum:[fDefaults objectForKey:@"SpeedLimitAutoOnDate"]]);
    tr_sessionSetAltSpeedEnd(fHandle, [PrefsController dateToTimeSum:[fDefaults objectForKey:@"SpeedLimitAutoOffDate"]]);
}

- (void)setAutoSpeedLimitDay:(id)sender
{
    tr_sessionSetAltSpeedDay(fHandle, static_cast<tr_sched_day>([sender selectedItem].tag));
}

+ (NSInteger)dateToTimeSum:(NSDate*)date
{
    NSCalendar* calendar = NSCalendar.currentCalendar;
    NSDateComponents* components = [calendar components:NSCalendarUnitHour | NSCalendarUnitMinute fromDate:date];
    return components.hour * 60 + components.minute;
}

+ (NSDate*)timeSumToDate:(NSInteger)sum
{
    NSDateComponents* comps = [[NSDateComponents alloc] init];
    comps.hour = sum / 60;
    comps.minute = sum % 60;

    return [NSCalendar.currentCalendar dateFromComponents:comps];
}

- (BOOL)control:(NSControl*)control textShouldBeginEditing:(NSText*)fieldEditor
{
    fInitialString = control.stringValue;

    return YES;
}

- (BOOL)control:(NSControl*)control didFailToFormatString:(NSString*)string errorDescription:(NSString*)error
{
    NSBeep();
    if (fInitialString)
    {
        control.stringValue = fInitialString;
        fInitialString = nil;
    }
    return NO;
}

- (void)setBadge:(id)sender
{
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateUI" object:self];
}

- (IBAction)openNotificationSystemPrefs:(NSButton*)sender
{
    [NSWorkspace.sharedWorkspace openURL:[NSURL fileURLWithPath:@"/System/Library/PreferencePanes/Notifications.prefPane"]];
}

- (void)resetWarnings:(id)sender
{
    [fDefaults removeObjectForKey:@"WarningDuplicate"];
    [fDefaults removeObjectForKey:@"WarningRemainingSpace"];
    [fDefaults removeObjectForKey:@"WarningFolderDataSameName"];
    [fDefaults removeObjectForKey:@"WarningResetStats"];
    [fDefaults removeObjectForKey:@"WarningCreatorBlankAddress"];
    [fDefaults removeObjectForKey:@"WarningCreatorPrivateBlankAddress"];
    [fDefaults removeObjectForKey:@"WarningRemoveTrackers"];
    [fDefaults removeObjectForKey:@"WarningInvalidOpen"];
    [fDefaults removeObjectForKey:@"WarningRemoveCompleted"];
    [fDefaults removeObjectForKey:@"WarningDonate"];
    //[fDefaults removeObjectForKey: @"WarningLegal"];
}

- (void)setDefaultForMagnets:(id)sender
{
    NSString* bundleID = NSBundle.mainBundle.bundleIdentifier;
    OSStatus const result = LSSetDefaultHandlerForURLScheme((CFStringRef) @"magnet", (__bridge CFStringRef)bundleID);
    if (result != noErr)
    {
        NSLog(@"Failed setting default magnet link handler");
    }
}

- (void)setQueue:(id)sender
{
    //let's just do both - easier that way
    tr_sessionSetQueueEnabled(fHandle, TR_DOWN, [fDefaults boolForKey:@"Queue"]);
    tr_sessionSetQueueEnabled(fHandle, TR_UP, [fDefaults boolForKey:@"QueueSeed"]);

    //handle if any transfers switch from queued to paused
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateQueue" object:self];
}

- (void)setQueueNumber:(id)sender
{
    NSInteger const number = [sender intValue];
    BOOL const seed = sender == fQueueSeedField;

    [fDefaults setInteger:number forKey:seed ? @"QueueSeedNumber" : @"QueueDownloadNumber"];

    tr_sessionSetQueueSize(fHandle, seed ? TR_UP : TR_DOWN, number);
}

- (void)setStalled:(id)sender
{
    tr_sessionSetQueueStalledEnabled(fHandle, [fDefaults boolForKey:@"CheckStalled"]);

    //reload main table for stalled status
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateUI" object:nil];
}

- (void)setStalledMinutes:(id)sender
{
    NSInteger const min = [sender intValue];
    [fDefaults setInteger:min forKey:@"StalledMinutes"];
    tr_sessionSetQueueStalledMinutes(fHandle, min);

    //reload main table for stalled status
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateUI" object:self];
}

- (void)setDownloadLocation:(id)sender
{
    [fDefaults setBool:fFolderPopUp.indexOfSelectedItem == DOWNLOAD_FOLDER forKey:@"DownloadLocationConstant"];
    [self updateShowAddMagnetWindowField];
}

- (void)folderSheetShow:(id)sender
{
    NSOpenPanel* panel = [NSOpenPanel openPanel];

    panel.prompt = NSLocalizedString(@"Select", "Preferences -> Open panel prompt");
    panel.allowsMultipleSelection = NO;
    panel.canChooseFiles = NO;
    panel.canChooseDirectories = YES;
    panel.canCreateDirectories = YES;

    [panel beginSheetModalForWindow:self.window completionHandler:^(NSInteger result) {
        if (result == NSFileHandlingPanelOKButton)
        {
            [fFolderPopUp selectItemAtIndex:DOWNLOAD_FOLDER];

            NSString* folder = panel.URLs[0].path;
            [fDefaults setObject:folder forKey:@"DownloadFolder"];
            [fDefaults setBool:YES forKey:@"DownloadLocationConstant"];
            [self updateShowAddMagnetWindowField];

            assert(folder.length > 0);
            tr_sessionSetDownloadDir(fHandle, folder.fileSystemRepresentation);
        }
        else
        {
            //reset if cancelled
            [fFolderPopUp selectItemAtIndex:[fDefaults boolForKey:@"DownloadLocationConstant"] ? DOWNLOAD_FOLDER : DOWNLOAD_TORRENT];
        }
    }];
}

- (void)incompleteFolderSheetShow:(id)sender
{
    NSOpenPanel* panel = [NSOpenPanel openPanel];

    panel.prompt = NSLocalizedString(@"Select", "Preferences -> Open panel prompt");
    panel.allowsMultipleSelection = NO;
    panel.canChooseFiles = NO;
    panel.canChooseDirectories = YES;
    panel.canCreateDirectories = YES;

    [panel beginSheetModalForWindow:self.window completionHandler:^(NSInteger result) {
        if (result == NSFileHandlingPanelOKButton)
        {
            NSString* folder = panel.URLs[0].path;
            [fDefaults setObject:folder forKey:@"IncompleteDownloadFolder"];

            assert(folder.length > 0);
            tr_sessionSetIncompleteDir(fHandle, folder.fileSystemRepresentation);
        }
        [fIncompleteFolderPopUp selectItemAtIndex:0];
    }];
}

- (void)doneScriptSheetShow:(id)sender
{
    NSOpenPanel* panel = [NSOpenPanel openPanel];

    panel.prompt = NSLocalizedString(@"Select", "Preferences -> Open panel prompt");
    panel.allowsMultipleSelection = NO;
    panel.canChooseFiles = YES;
    panel.canChooseDirectories = NO;
    panel.canCreateDirectories = NO;

    [panel beginSheetModalForWindow:self.window completionHandler:^(NSInteger result) {
        if (result == NSFileHandlingPanelOKButton)
        {
            NSString* filePath = panel.URLs[0].path;

            assert(filePath.length > 0);

            [fDefaults setObject:filePath forKey:@"DoneScriptPath"];
            tr_sessionSetTorrentDoneScript(fHandle, filePath.fileSystemRepresentation);

            [fDefaults setBool:YES forKey:@"DoneScriptEnabled"];
            tr_sessionSetTorrentDoneScriptEnabled(fHandle, YES);
        }
        [fDoneScriptPopUp selectItemAtIndex:0];
    }];
}

- (void)setUseIncompleteFolder:(id)sender
{
    tr_sessionSetIncompleteDirEnabled(fHandle, [fDefaults boolForKey:@"UseIncompleteDownloadFolder"]);
}

- (void)setRenamePartialFiles:(id)sender
{
    tr_sessionSetIncompleteFileNamingEnabled(fHandle, [fDefaults boolForKey:@"RenamePartialFiles"]);
}

- (void)setShowAddMagnetWindow:(id)sender
{
    [fDefaults setBool:(fShowMagnetAddWindowCheck.state == NSOnState) forKey:@"MagnetOpenAsk"];
}

- (void)updateShowAddMagnetWindowField
{
    if (![fDefaults boolForKey:@"DownloadLocationConstant"])
    {
        //always show the add window for magnet links when the download location is the same as the torrent file
        fShowMagnetAddWindowCheck.state = NSOnState;
        fShowMagnetAddWindowCheck.enabled = NO;
    }
    else
    {
        fShowMagnetAddWindowCheck.state = [fDefaults boolForKey:@"MagnetOpenAsk"];
        fShowMagnetAddWindowCheck.enabled = YES;
    }
}

- (void)setDoneScriptEnabled:(id)sender
{
    if ([fDefaults boolForKey:@"DoneScriptEnabled"] &&
        ![NSFileManager.defaultManager fileExistsAtPath:[fDefaults stringForKey:@"DoneScriptPath"]])
    {
        // enabled is set but script file doesn't exist, so prompt for one and disable until they pick one
        [fDefaults setBool:NO forKey:@"DoneScriptEnabled"];
        [self doneScriptSheetShow:sender];
    }
    tr_sessionSetTorrentDoneScriptEnabled(fHandle, [fDefaults boolForKey:@"DoneScriptEnabled"]);
}

- (void)setAutoImport:(id)sender
{
    NSString* path;
    if ((path = [fDefaults stringForKey:@"AutoImportDirectory"]))
    {
        VDKQueue* watcherQueue = ((Controller*)NSApp.delegate).fileWatcherQueue;
        if ([fDefaults boolForKey:@"AutoImport"])
        {
            path = path.stringByExpandingTildeInPath;
            [watcherQueue addPath:path notifyingAbout:VDKQueueNotifyAboutWrite];
        }
        else
        {
            [watcherQueue removeAllPaths];
        }

        [NSNotificationCenter.defaultCenter postNotificationName:@"AutoImportSettingChange" object:self];
    }
    else
    {
        [self importFolderSheetShow:nil];
    }
}

- (void)importFolderSheetShow:(id)sender
{
    NSOpenPanel* panel = [NSOpenPanel openPanel];

    panel.prompt = NSLocalizedString(@"Select", "Preferences -> Open panel prompt");
    panel.allowsMultipleSelection = NO;
    panel.canChooseFiles = NO;
    panel.canChooseDirectories = YES;
    panel.canCreateDirectories = YES;

    [panel beginSheetModalForWindow:self.window completionHandler:^(NSInteger result) {
        if (result == NSFileHandlingPanelOKButton)
        {
            VDKQueue* watcherQueue = ((Controller*)NSApp.delegate).fileWatcherQueue;
            [watcherQueue removeAllPaths];

            NSString* path = (panel.URLs[0]).path;
            [fDefaults setObject:path forKey:@"AutoImportDirectory"];
            [watcherQueue addPath:path.stringByExpandingTildeInPath notifyingAbout:VDKQueueNotifyAboutWrite];

            [NSNotificationCenter.defaultCenter postNotificationName:@"AutoImportSettingChange" object:self];
        }
        else
        {
            NSString* path = [fDefaults stringForKey:@"AutoImportDirectory"];
            if (!path)
                [fDefaults setBool:NO forKey:@"AutoImport"];
        }

        [fImportFolderPopUp selectItemAtIndex:0];
    }];
}

- (void)setAutoSize:(id)sender
{
    [NSNotificationCenter.defaultCenter postNotificationName:@"AutoSizeSettingChange" object:self];
}

- (void)setRPCEnabled:(id)sender
{
    BOOL enable = [fDefaults boolForKey:@"RPC"];
    tr_sessionSetRPCEnabled(fHandle, enable);

    [self setRPCWebUIDiscovery:nil];
}

- (void)linkWebUI:(id)sender
{
    NSString* urlString = [NSString stringWithFormat:WEBUI_URL, [fDefaults integerForKey:@"RPCPort"]];
    [NSWorkspace.sharedWorkspace openURL:[NSURL URLWithString:urlString]];
}

- (void)setRPCAuthorize:(id)sender
{
    tr_sessionSetRPCPasswordEnabled(fHandle, [fDefaults boolForKey:@"RPCAuthorize"]);
}

- (void)setRPCUsername:(id)sender
{
    tr_sessionSetRPCUsername(fHandle, [fDefaults stringForKey:@"RPCUsername"].UTF8String);
}

- (void)setRPCPassword:(id)sender
{
    fRPCPassword = [[sender stringValue] copy];

    char const* password = [sender stringValue].UTF8String;
    [self setKeychainPassword:password forService:RPC_KEYCHAIN_SERVICE username:RPC_KEYCHAIN_NAME];

    tr_sessionSetRPCPassword(fHandle, password);
}

- (void)updateRPCPassword
{
    UInt32 passwordLength;
    char const* password = nil;
    SecKeychainFindGenericPassword(
        NULL,
        strlen(RPC_KEYCHAIN_SERVICE),
        RPC_KEYCHAIN_SERVICE,
        strlen(RPC_KEYCHAIN_NAME),
        RPC_KEYCHAIN_NAME,
        &passwordLength,
        (void**)&password,
        NULL);

    if (password != NULL)
    {
        char fullPassword[passwordLength + 1];
        strncpy(fullPassword, password, passwordLength);
        fullPassword[passwordLength] = '\0';
        SecKeychainItemFreeContent(NULL, (void*)password);

        tr_sessionSetRPCPassword(fHandle, fullPassword);

        fRPCPassword = [[NSString alloc] initWithUTF8String:fullPassword];
        fRPCPasswordField.stringValue = fRPCPassword;
    }
    else
    {
        fRPCPassword = nil;
    }
}

- (void)setRPCPort:(id)sender
{
    int port = [sender intValue];
    [fDefaults setInteger:port forKey:@"RPCPort"];
    tr_sessionSetRPCPort(fHandle, port);

    [self setRPCWebUIDiscovery:nil];
}

- (void)setRPCUseWhitelist:(id)sender
{
    tr_sessionSetRPCWhitelistEnabled(fHandle, [fDefaults boolForKey:@"RPCUseWhitelist"]);
}

- (void)setRPCWebUIDiscovery:(id)sender
{
    if ([fDefaults boolForKey:@"RPC"] && [fDefaults boolForKey:@"RPCWebDiscovery"])
    {
        [BonjourController.defaultController startWithPort:[fDefaults integerForKey:@"RPCPort"]];
    }
    else
    {
        if (BonjourController.defaultControllerExists)
        {
            [BonjourController.defaultController stop];
        }
    }
}

- (void)updateRPCWhitelist
{
    NSString* string = [fRPCWhitelistArray componentsJoinedByString:@","];
    tr_sessionSetRPCWhitelist(fHandle, string.UTF8String);
}

- (void)addRemoveRPCIP:(id)sender
{
    //don't allow add/remove when currently adding - it leads to weird results
    if (fRPCWhitelistTable.editedRow != -1)
    {
        return;
    }

    if ([[sender cell] tagForSegment:[sender selectedSegment]] == RPC_IP_REMOVE_TAG)
    {
        [fRPCWhitelistArray removeObjectsAtIndexes:fRPCWhitelistTable.selectedRowIndexes];
        [fRPCWhitelistTable deselectAll:self];
        [fRPCWhitelistTable reloadData];

        [fDefaults setObject:fRPCWhitelistArray forKey:@"RPCWhitelist"];
        [self updateRPCWhitelist];
    }
    else
    {
        [fRPCWhitelistArray addObject:@""];
        [fRPCWhitelistTable reloadData];

        int const row = fRPCWhitelistArray.count - 1;
        [fRPCWhitelistTable selectRowIndexes:[NSIndexSet indexSetWithIndex:row] byExtendingSelection:NO];
        [fRPCWhitelistTable editColumn:0 row:row withEvent:nil select:YES];
    }
}

- (NSInteger)numberOfRowsInTableView:(NSTableView*)tableView
{
    return fRPCWhitelistArray.count;
}

- (id)tableView:(NSTableView*)tableView objectValueForTableColumn:(NSTableColumn*)tableColumn row:(NSInteger)row
{
    return fRPCWhitelistArray[row];
}

- (void)tableView:(NSTableView*)tableView
    setObjectValue:(id)object
    forTableColumn:(NSTableColumn*)tableColumn
               row:(NSInteger)row
{
    NSArray* components = [object componentsSeparatedByString:@"."];
    NSMutableArray* newComponents = [NSMutableArray arrayWithCapacity:4];

    //create better-formatted ip string
    BOOL valid = false;
    if (components.count == 4)
    {
        valid = true;
        for (NSString* component in components)
        {
            if ([component isEqualToString:@"*"])
            {
                [newComponents addObject:component];
            }
            else
            {
                int num = component.intValue;
                if (num >= 0 && num < 256)
                {
                    [newComponents addObject:@(num).stringValue];
                }
                else
                {
                    valid = false;
                    break;
                }
            }
        }
    }

    NSString* newIP;
    if (valid)
    {
        newIP = [newComponents componentsJoinedByString:@"."];

        //don't allow the same ip address
        if ([fRPCWhitelistArray containsObject:newIP] && ![fRPCWhitelistArray[row] isEqualToString:newIP])
        {
            valid = false;
        }
    }

    if (valid)
    {
        fRPCWhitelistArray[row] = newIP;
        [fRPCWhitelistArray sortUsingSelector:@selector(compareNumeric:)];
    }
    else
    {
        NSBeep();
        if ([fRPCWhitelistArray[row] isEqualToString:@""])
        {
            [fRPCWhitelistArray removeObjectAtIndex:row];
        }
    }

    [fRPCWhitelistTable deselectAll:self];
    [fRPCWhitelistTable reloadData];

    [fDefaults setObject:fRPCWhitelistArray forKey:@"RPCWhitelist"];
    [self updateRPCWhitelist];
}

- (void)tableViewSelectionDidChange:(NSNotification*)notification
{
    [fRPCAddRemoveControl setEnabled:fRPCWhitelistTable.numberOfSelectedRows > 0 forSegment:RPC_IP_REMOVE_TAG];
}

- (void)helpForScript:(id)sender
{
    [NSHelpManager.sharedHelpManager openHelpAnchor:@"script"
                                             inBook:[NSBundle.mainBundle objectForInfoDictionaryKey:@"CFBundleHelpBookName"]];
}

- (void)helpForPeers:(id)sender
{
    [NSHelpManager.sharedHelpManager openHelpAnchor:@"peers"
                                             inBook:[NSBundle.mainBundle objectForInfoDictionaryKey:@"CFBundleHelpBookName"]];
}

- (void)helpForNetwork:(id)sender
{
    [NSHelpManager.sharedHelpManager openHelpAnchor:@"network"
                                             inBook:[NSBundle.mainBundle objectForInfoDictionaryKey:@"CFBundleHelpBookName"]];
}

- (void)helpForRemote:(id)sender
{
    [NSHelpManager.sharedHelpManager openHelpAnchor:@"remote"
                                             inBook:[NSBundle.mainBundle objectForInfoDictionaryKey:@"CFBundleHelpBookName"]];
}

- (void)rpcUpdatePrefs
{
    //encryption
    tr_encryption_mode const encryptionMode = tr_sessionGetEncryption(fHandle);
    [fDefaults setBool:encryptionMode != TR_CLEAR_PREFERRED forKey:@"EncryptionPrefer"];
    [fDefaults setBool:encryptionMode == TR_ENCRYPTION_REQUIRED forKey:@"EncryptionRequire"];

    //download directory
    NSString* downloadLocation = @(tr_sessionGetDownloadDir(fHandle)).stringByStandardizingPath;
    [fDefaults setObject:downloadLocation forKey:@"DownloadFolder"];

    NSString* incompleteLocation = @(tr_sessionGetIncompleteDir(fHandle)).stringByStandardizingPath;
    [fDefaults setObject:incompleteLocation forKey:@"IncompleteDownloadFolder"];

    BOOL const useIncomplete = tr_sessionIsIncompleteDirEnabled(fHandle);
    [fDefaults setBool:useIncomplete forKey:@"UseIncompleteDownloadFolder"];

    BOOL const usePartialFileRanaming = tr_sessionIsIncompleteFileNamingEnabled(fHandle);
    [fDefaults setBool:usePartialFileRanaming forKey:@"RenamePartialFiles"];

    //utp
    BOOL const utp = tr_sessionIsUTPEnabled(fHandle);
    [fDefaults setBool:utp forKey:@"UTPGlobal"];

    //peers
    uint16_t const peersTotal = tr_sessionGetPeerLimit(fHandle);
    [fDefaults setInteger:peersTotal forKey:@"PeersTotal"];

    uint16_t const peersTorrent = tr_sessionGetPeerLimitPerTorrent(fHandle);
    [fDefaults setInteger:peersTorrent forKey:@"PeersTorrent"];

    //pex
    BOOL const pex = tr_sessionIsPexEnabled(fHandle);
    [fDefaults setBool:pex forKey:@"PEXGlobal"];

    //dht
    BOOL const dht = tr_sessionIsDHTEnabled(fHandle);
    [fDefaults setBool:dht forKey:@"DHTGlobal"];

    //lpd
    BOOL const lpd = tr_sessionIsLPDEnabled(fHandle);
    [fDefaults setBool:lpd forKey:@"LocalPeerDiscoveryGlobal"];

    //auto start
    BOOL const autoStart = !tr_sessionGetPaused(fHandle);
    [fDefaults setBool:autoStart forKey:@"AutoStartDownload"];

    //port
    tr_port const port = tr_sessionGetPeerPort(fHandle);
    [fDefaults setInteger:port forKey:@"BindPort"];

    BOOL const nat = tr_sessionIsPortForwardingEnabled(fHandle);
    [fDefaults setBool:nat forKey:@"NatTraversal"];

    fPeerPort = -1;
    fNatStatus = -1;
    [self updatePortStatus];

    BOOL const randomPort = tr_sessionGetPeerPortRandomOnStart(fHandle);
    [fDefaults setBool:randomPort forKey:@"RandomPort"];

    //speed limit - down
    BOOL const downLimitEnabled = tr_sessionIsSpeedLimited(fHandle, TR_DOWN);
    [fDefaults setBool:downLimitEnabled forKey:@"CheckDownload"];

    int const downLimit = tr_sessionGetSpeedLimit_KBps(fHandle, TR_DOWN);
    [fDefaults setInteger:downLimit forKey:@"DownloadLimit"];

    //speed limit - up
    BOOL const upLimitEnabled = tr_sessionIsSpeedLimited(fHandle, TR_UP);
    [fDefaults setBool:upLimitEnabled forKey:@"CheckUpload"];

    int const upLimit = tr_sessionGetSpeedLimit_KBps(fHandle, TR_UP);
    [fDefaults setInteger:upLimit forKey:@"UploadLimit"];

    //alt speed limit enabled
    BOOL const useAltSpeed = tr_sessionUsesAltSpeed(fHandle);
    [fDefaults setBool:useAltSpeed forKey:@"SpeedLimit"];

    //alt speed limit - down
    int const downLimitAlt = tr_sessionGetAltSpeed_KBps(fHandle, TR_DOWN);
    [fDefaults setInteger:downLimitAlt forKey:@"SpeedLimitDownloadLimit"];

    //alt speed limit - up
    int const upLimitAlt = tr_sessionGetAltSpeed_KBps(fHandle, TR_UP);
    [fDefaults setInteger:upLimitAlt forKey:@"SpeedLimitUploadLimit"];

    //alt speed limit schedule
    BOOL const useAltSpeedSched = tr_sessionUsesAltSpeedTime(fHandle);
    [fDefaults setBool:useAltSpeedSched forKey:@"SpeedLimitAuto"];

    NSDate* limitStartDate = [PrefsController timeSumToDate:tr_sessionGetAltSpeedBegin(fHandle)];
    [fDefaults setObject:limitStartDate forKey:@"SpeedLimitAutoOnDate"];

    NSDate* limitEndDate = [PrefsController timeSumToDate:tr_sessionGetAltSpeedEnd(fHandle)];
    [fDefaults setObject:limitEndDate forKey:@"SpeedLimitAutoOffDate"];

    int const limitDay = tr_sessionGetAltSpeedDay(fHandle);
    [fDefaults setInteger:limitDay forKey:@"SpeedLimitAutoDay"];

    //blocklist
    BOOL const blocklist = tr_blocklistIsEnabled(fHandle);
    [fDefaults setBool:blocklist forKey:@"BlocklistNew"];

    NSString* blocklistURL = @(tr_blocklistGetURL(fHandle));
    [fDefaults setObject:blocklistURL forKey:@"BlocklistURL"];

    //seed ratio
    BOOL const ratioLimited = tr_sessionIsRatioLimited(fHandle);
    [fDefaults setBool:ratioLimited forKey:@"RatioCheck"];

    float const ratioLimit = tr_sessionGetRatioLimit(fHandle);
    [fDefaults setFloat:ratioLimit forKey:@"RatioLimit"];

    //idle seed limit
    BOOL const idleLimited = tr_sessionIsIdleLimited(fHandle);
    [fDefaults setBool:idleLimited forKey:@"IdleLimitCheck"];

    NSUInteger const idleLimitMin = tr_sessionGetIdleLimit(fHandle);
    [fDefaults setInteger:idleLimitMin forKey:@"IdleLimitMinutes"];

    //queue
    BOOL const downloadQueue = tr_sessionGetQueueEnabled(fHandle, TR_DOWN);
    [fDefaults setBool:downloadQueue forKey:@"Queue"];

    int const downloadQueueNum = tr_sessionGetQueueSize(fHandle, TR_DOWN);
    [fDefaults setInteger:downloadQueueNum forKey:@"QueueDownloadNumber"];

    BOOL const seedQueue = tr_sessionGetQueueEnabled(fHandle, TR_UP);
    [fDefaults setBool:seedQueue forKey:@"QueueSeed"];

    int const seedQueueNum = tr_sessionGetQueueSize(fHandle, TR_UP);
    [fDefaults setInteger:seedQueueNum forKey:@"QueueSeedNumber"];

    BOOL const checkStalled = tr_sessionGetQueueStalledEnabled(fHandle);
    [fDefaults setBool:checkStalled forKey:@"CheckStalled"];

    int const stalledMinutes = tr_sessionGetQueueStalledMinutes(fHandle);
    [fDefaults setInteger:stalledMinutes forKey:@"StalledMinutes"];

    //done script
    BOOL const doneScriptEnabled = tr_sessionIsTorrentDoneScriptEnabled(fHandle);
    [fDefaults setBool:doneScriptEnabled forKey:@"DoneScriptEnabled"];

    NSString* doneScriptPath = @(tr_sessionGetTorrentDoneScript(fHandle));
    [fDefaults setObject:doneScriptPath forKey:@"DoneScriptPath"];

    //update gui if loaded
    if (fHasLoaded)
    {
        //encryption handled by bindings

        //download directory handled by bindings

        //utp handled by bindings

        fPeersGlobalField.intValue = peersTotal;
        fPeersTorrentField.intValue = peersTorrent;

        //pex handled by bindings

        //dht handled by bindings

        //lpd handled by bindings

        fPortField.intValue = port;
        //port forwarding (nat) handled by bindings
        //random port handled by bindings

        //limit check handled by bindings
        fDownloadField.intValue = downLimit;

        //limit check handled by bindings
        fUploadField.intValue = upLimit;

        fSpeedLimitDownloadField.intValue = downLimitAlt;

        fSpeedLimitUploadField.intValue = upLimitAlt;

        //speed limit schedule handled by bindings

        //speed limit schedule times and day handled by bindings

        fBlocklistURLField.stringValue = blocklistURL;
        [self updateBlocklistButton];
        [self updateBlocklistFields];

        //ratio limit enabled handled by bindings
        fRatioStopField.floatValue = ratioLimit;

        //idle limit enabled handled by bindings
        fIdleStopField.integerValue = idleLimitMin;

        //queues enabled handled by bindings
        fQueueDownloadField.intValue = downloadQueueNum;
        fQueueSeedField.intValue = seedQueueNum;

        //check stalled handled by bindings
        fStalledField.intValue = stalledMinutes;
    }

    [NSNotificationCenter.defaultCenter postNotificationName:@"SpeedLimitUpdate" object:nil];

    //reload global settings in inspector
    [NSNotificationCenter.defaultCenter postNotificationName:@"UpdateGlobalOptions" object:nil];
}

@end

@implementation PrefsController (Private)

- (void)setPrefView:(id)sender
{
    NSString* identifier;
    if (sender)
    {
        identifier = [sender itemIdentifier];
        [NSUserDefaults.standardUserDefaults setObject:identifier forKey:@"SelectedPrefView"];
    }
    else
    {
        identifier = [NSUserDefaults.standardUserDefaults stringForKey:@"SelectedPrefView"];
    }

    NSView* view;
    if ([identifier isEqualToString:TOOLBAR_TRANSFERS])
    {
        view = fTransfersView;
    }
    else if ([identifier isEqualToString:TOOLBAR_GROUPS])
    {
        view = fGroupsView;
    }
    else if ([identifier isEqualToString:TOOLBAR_BANDWIDTH])
    {
        view = fBandwidthView;
    }
    else if ([identifier isEqualToString:TOOLBAR_PEERS])
    {
        view = fPeersView;
    }
    else if ([identifier isEqualToString:TOOLBAR_NETWORK])
    {
        view = fNetworkView;
    }
    else if ([identifier isEqualToString:TOOLBAR_REMOTE])
    {
        view = fRemoteView;
    }
    else
    {
        identifier = TOOLBAR_GENERAL; //general view is the default selected
        view = fGeneralView;
    }

    self.window.toolbar.selectedItemIdentifier = identifier;

    NSWindow* window = self.window;
    if (window.contentView == view)
    {
        return;
    }

    NSRect windowRect = window.frame;
    CGFloat const difference = NSHeight(view.frame) - NSHeight(window.contentView.frame);
    windowRect.origin.y -= difference;
    windowRect.size.height += difference;

    view.hidden = YES;
    window.contentView = view;
    [window setFrame:windowRect display:YES animate:YES];
    view.hidden = NO;

    //set title label
    if (sender)
    {
        window.title = [sender label];
    }
    else
    {
        NSToolbar* toolbar = window.toolbar;
        NSString* itemIdentifier = toolbar.selectedItemIdentifier;
        for (NSToolbarItem* item in toolbar.items)
        {
            if ([item.itemIdentifier isEqualToString:itemIdentifier])
            {
                window.title = item.label;
                break;
            }
        }
    }
}

static NSString* getOSStatusDescription(OSStatus errorCode)
{
    return [NSError errorWithDomain:NSOSStatusErrorDomain code:errorCode userInfo:NULL].description;
}

- (void)setKeychainPassword:(char const*)password forService:(char const*)service username:(char const*)username
{
    SecKeychainItemRef item = NULL;
    NSUInteger passwordLength = strlen(password);

    OSStatus result = SecKeychainFindGenericPassword(NULL, strlen(service), service, strlen(username), username, NULL, NULL, &item);
    if (result == noErr && item)
    {
        if (passwordLength > 0) //found, so update
        {
            result = SecKeychainItemModifyAttributesAndData(item, NULL, passwordLength, (void const*)password);
            if (result != noErr)
            {
                NSLog(@"Problem updating Keychain item: %@", getOSStatusDescription(result));
            }
        }
        else //remove the item
        {
            result = SecKeychainItemDelete(item);
            if (result != noErr)
            {
                NSLog(@"Problem removing Keychain item: %@", getOSStatusDescription(result));
            }
        }
    }
    else if (result == errSecItemNotFound) //not found, so add
    {
        if (passwordLength > 0)
        {
            result = SecKeychainAddGenericPassword(NULL, strlen(service), service, strlen(username), username, passwordLength, (void const*)password, NULL);
            if (result != noErr)
            {
                NSLog(@"Problem adding Keychain item: %@", getOSStatusDescription(result));
            }
        }
    }
    else
    {
        NSLog(@"Problem accessing Keychain: %@", getOSStatusDescription(result));
    }
}

@end