// This file Copyright © Transmission authors and contributors.
// It may be used under the MIT (SPDX: MIT) license.
// License text can be found in the licenses/ folder.

#import "StatusBarController.h"
#import "NSStringAdditions.h"

typedef NSString* StatusRatioType NS_TYPED_EXTENSIBLE_ENUM;

static StatusRatioType const StatusRatioTypeTotal = @"RatioTotal";
static StatusRatioType const StatusRatioTypeSession = @"RatioSession";

typedef NSString* StatusTransferType NS_TYPED_EXTENSIBLE_ENUM;

static StatusTransferType const StatusTransferTypeTotal = @"TransferTotal";
static StatusTransferType const StatusTransferTypeSession = @"TransferSession";

typedef NS_ENUM(NSUInteger, StatusTag) {
    StatusTagTotalRatio = 0,
    StatusTagSessionRatio = 1,
    StatusTagTotalTransfer = 2,
    StatusTagSessionTransfer = 3
};

@interface StatusBarController ()

@property(nonatomic) IBOutlet NSButton* fStatusButton;
@property(nonatomic) IBOutlet NSTextField* fTotalDLField;
@property(nonatomic) IBOutlet NSTextField* fTotalULField;
@property(nonatomic) IBOutlet NSImageView* fTotalDLImageView;
@property(nonatomic) IBOutlet NSImageView* fTotalULImageView;

@property(nonatomic, readonly) tr_session* fLib;

@property(nonatomic) CGFloat fPreviousDownloadRate;
@property(nonatomic) CGFloat fPreviousUploadRate;

@end

@implementation StatusBarController

- (instancetype)initWithLib:(tr_session*)lib
{
    if ((self = [super initWithNibName:@"StatusBar" bundle:nil]))
    {
        _fLib = lib;

        _fPreviousDownloadRate = -1.0;
        _fPreviousUploadRate = -1.0;
    }

    return self;
}

- (void)awakeFromNib
{
    //localize menu items
    [self.fStatusButton.menu itemWithTag:StatusTagTotalRatio].title = NSLocalizedString(@"Total Ratio", "Status Bar -> status menu");
    [self.fStatusButton.menu itemWithTag:StatusTagSessionRatio].title = NSLocalizedString(@"Session Ratio", "Status Bar -> status menu");
    [self.fStatusButton.menu itemWithTag:StatusTagTotalTransfer].title = NSLocalizedString(@"Total Transfer", "Status Bar -> status menu");
    [self.fStatusButton.menu itemWithTag:StatusTagSessionTransfer].title = NSLocalizedString(@"Session Transfer", "Status Bar -> status menu");

    self.fStatusButton.cell.backgroundStyle = NSBackgroundStyleRaised;
    self.fTotalDLField.cell.backgroundStyle = NSBackgroundStyleRaised;
    self.fTotalULField.cell.backgroundStyle = NSBackgroundStyleRaised;
    self.fTotalDLImageView.cell.backgroundStyle = NSBackgroundStyleRaised;
    self.fTotalULImageView.cell.backgroundStyle = NSBackgroundStyleRaised;

    [self updateSpeedFieldsToolTips];

    //update when speed limits are changed
    [NSNotificationCenter.defaultCenter addObserver:self selector:@selector(updateSpeedFieldsToolTips) name:@"SpeedLimitUpdate"
                                             object:nil];
}

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

- (void)updateWithDownload:(CGFloat)dlRate upload:(CGFloat)ulRate
{
    //set rates
    if (dlRate != self.fPreviousDownloadRate)
    {
        self.fTotalDLField.stringValue = [NSString stringForSpeed:dlRate];
        self.fPreviousDownloadRate = dlRate;
    }

    if (ulRate != self.fPreviousUploadRate)
    {
        self.fTotalULField.stringValue = [NSString stringForSpeed:ulRate];
        self.fPreviousUploadRate = ulRate;
    }

    //set status button text
    NSString *statusLabel = [NSUserDefaults.standardUserDefaults stringForKey:@"StatusLabel"], *statusString;
    BOOL total;
    if ((total = [statusLabel isEqualToString:StatusRatioTypeTotal]) || [statusLabel isEqualToString:StatusRatioTypeSession])
    {
        auto const stats = total ? tr_sessionGetCumulativeStats(self.fLib) : tr_sessionGetStats(self.fLib);

        statusString = [NSLocalizedString(@"Ratio", "status bar -> status label")
            stringByAppendingFormat:@": %@", [NSString stringForRatio:stats.ratio]];
    }
    else //StatusTransferTypeTotal or StatusTransferTypeSession
    {
        total = [statusLabel isEqualToString:StatusTransferTypeTotal];

        auto const stats = total ? tr_sessionGetCumulativeStats(self.fLib) : tr_sessionGetStats(self.fLib);

        statusString = [NSString stringWithFormat:@"%@: %@  %@: %@",
                                                  NSLocalizedString(@"DL", "status bar -> status label"),
                                                  [NSString stringForFileSize:stats.downloadedBytes],
                                                  NSLocalizedString(@"UL", "status bar -> status label"),
                                                  [NSString stringForFileSize:stats.uploadedBytes]];
    }

    if (![self.fStatusButton.title isEqualToString:statusString])
    {
        self.fStatusButton.title = statusString;
    }
}

- (void)setStatusLabel:(id)sender
{
    NSString* statusLabel;
    switch ([sender tag])
    {
    case StatusTagTotalRatio:
        statusLabel = StatusRatioTypeTotal;
        break;
    case StatusTagSessionRatio:
        statusLabel = StatusRatioTypeSession;
        break;
    case StatusTagTotalTransfer:
        statusLabel = StatusTransferTypeTotal;
        break;
    case StatusTagSessionTransfer:
        statusLabel = StatusTransferTypeSession;
        break;
    default:
        NSAssert1(NO, @"Unknown status label tag received: %ld", [sender tag]);
        return;
    }

    [NSUserDefaults.standardUserDefaults setObject:statusLabel forKey:@"StatusLabel"];

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

- (void)updateSpeedFieldsToolTips
{
    NSString *uploadText, *downloadText;

    if ([NSUserDefaults.standardUserDefaults boolForKey:@"SpeedLimit"])
    {
        NSString* speedString = [NSString stringWithFormat:@"%@ (%@)",
                                                           NSLocalizedString(@"%ld KB/s", "Status Bar -> speed tooltip"),
                                                           NSLocalizedString(@"Speed Limit", "Status Bar -> speed tooltip")];

        uploadText = [NSString stringWithFormat:speedString, [NSUserDefaults.standardUserDefaults integerForKey:@"SpeedLimitUploadLimit"]];
        downloadText = [NSString stringWithFormat:speedString, [NSUserDefaults.standardUserDefaults integerForKey:@"SpeedLimitDownloadLimit"]];
    }
    else
    {
        if ([NSUserDefaults.standardUserDefaults boolForKey:@"CheckUpload"])
        {
            uploadText = [NSString localizedStringWithFormat:NSLocalizedString(@"%ld KB/s", "Status Bar -> speed tooltip"),
                                                             [NSUserDefaults.standardUserDefaults integerForKey:@"UploadLimit"]];
        }
        else
        {
            uploadText = NSLocalizedString(@"unlimited", "Status Bar -> speed tooltip");
        }

        if ([NSUserDefaults.standardUserDefaults boolForKey:@"CheckDownload"])
        {
            downloadText = [NSString localizedStringWithFormat:NSLocalizedString(@"%ld KB/s", "Status Bar -> speed tooltip"),
                                                               [NSUserDefaults.standardUserDefaults integerForKey:@"DownloadLimit"]];
        }
        else
        {
            downloadText = NSLocalizedString(@"unlimited", "Status Bar -> speed tooltip");
        }
    }

    uploadText = [NSLocalizedString(@"Global upload limit", "Status Bar -> speed tooltip") stringByAppendingFormat:@": %@", uploadText];
    downloadText = [NSLocalizedString(@"Global download limit", "Status Bar -> speed tooltip") stringByAppendingFormat:@": %@", downloadText];

    self.fTotalULField.toolTip = uploadText;
    self.fTotalDLField.toolTip = downloadText;
}

- (BOOL)validateMenuItem:(NSMenuItem*)menuItem
{
    SEL const action = menuItem.action;

    //enable sort options
    if (action == @selector(setStatusLabel:))
    {
        NSString* statusLabel;
        switch (menuItem.tag)
        {
        case StatusTagTotalRatio:
            statusLabel = StatusRatioTypeTotal;
            break;
        case StatusTagSessionRatio:
            statusLabel = StatusRatioTypeSession;
            break;
        case StatusTagTotalTransfer:
            statusLabel = StatusTransferTypeTotal;
            break;
        case StatusTagSessionTransfer:
            statusLabel = StatusTransferTypeSession;
            break;
        default:
            NSAssert1(NO, @"Unknown status label tag received: %ld", menuItem.tag);
            statusLabel = StatusRatioTypeTotal;
        }

        menuItem.state = [statusLabel isEqualToString:[NSUserDefaults.standardUserDefaults stringForKey:@"StatusLabel"]] ?
            NSControlStateValueOn :
            NSControlStateValueOff;
        return YES;
    }

    return YES;
}

@end