//
//  helpers.swift
//  Kit
//
//  Created by Serhiy Mytrovtsiy on 29/09/2020.
//  Using Swift 5.0.
//  Running on macOS 10.15.
//
//  Copyright © 2020 Serhiy Mytrovtsiy. All rights reserved.
//
// swiftlint:disable file_length

import Cocoa
import ServiceManagement
import UserNotifications
import WebKit
import Metal

public struct LaunchAtLogin {
    private static let id = "\(Bundle.main.bundleIdentifier!).LaunchAtLogin"
    
    public static var isEnabled: Bool {
        get {
            if #available(macOS 13, *) {
                return isEnabledNext
            } else {
                return isEnabledLegacy
            }
        }
        set {
            if #available(macOS 13, *) {
                isEnabledNext = newValue
            } else {
                isEnabledLegacy = newValue
            }
        }
    }
    
    private static var isEnabledLegacy: Bool {
        get {
            guard let jobs = (LaunchAtLogin.self as DeprecationWarningWorkaround.Type).jobsDict else {
                return false
            }
            let job = jobs.first { $0["Label"] as! String == id }
            return job?["OnDemand"] as? Bool ?? false
        }
        set {
            SMLoginItemSetEnabled(id as CFString, newValue)
        }
    }
    
    @available(macOS 13, *)
    private static var isEnabledNext: Bool {
        get { SMAppService.mainApp.status == .enabled }
        set {
            do {
                if newValue {
                    if SMAppService.mainApp.status == .enabled {
                        try? SMAppService.mainApp.unregister()
                    }
                    try SMAppService.mainApp.register()
                } else {
                    try SMAppService.mainApp.unregister()
                }
            } catch {
                print("failed to \(newValue ? "enable" : "disable") launch at login: \(error.localizedDescription)")
            }
        }
    }
    
    public static func migrate() {
        guard #available(macOS 13, *), !Store.shared.exist(key: "LaunchAtLoginNext") else {
            return
        }
        
        Store.shared.set(key: "LaunchAtLoginNext", value: true)
        isEnabledNext = isEnabledLegacy
        isEnabledLegacy = false
        try? SMAppService.loginItem(identifier: id).unregister()
    }
}

private protocol DeprecationWarningWorkaround {
    static var jobsDict: [[String: AnyObject]]? { get }
}

extension LaunchAtLogin: DeprecationWarningWorkaround {
    @available(*, deprecated)
    static var jobsDict: [[String: AnyObject]]? {
        SMCopyAllJobDictionaries(kSMDomainUserLaunchd)?.takeRetainedValue() as? [[String: AnyObject]]
    }
}

public protocol KeyValue_p {
    var key: String { get }
    var value: String { get }
}

public struct KeyValue_t: KeyValue_p, Codable {
    public let key: String
    public let value: String
    public let additional: Any?
    
    private enum CodingKeys: String, CodingKey {
        case key, value
    }
    
    public init(key: String, value: String, additional: Any? = nil) {
        self.key = key
        self.value = value
        self.additional = additional
    }
    
    public init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        self.key = try container.decode(String.self, forKey: .key)
        self.value = try container.decode(String.self, forKey: .value)
        self.additional = nil
    }
    
    public func encode(to encoder: Encoder) throws {
        var container = encoder.container(keyedBy: CodingKeys.self)
        try container.encode(key, forKey: .key)
        try container.encode(value, forKey: .value)
    }
}

public struct Units {
    public let bytes: Int64
    
    public init(bytes: Int64) {
        self.bytes = bytes
    }
    
    public var kilobytes: Double {
        return Double(bytes) / 1_000
    }
    public var megabytes: Double {
        return kilobytes / 1_000
    }
    public var gigabytes: Double {
        return megabytes / 1_000
    }
    public var terabytes: Double {
        return gigabytes / 1_000
    }
    
    public func getReadableTuple(base: DataSizeBase = .byte) -> (String, String) {
        let stringBase = base == .byte ? "B" : "b"
        let multiplier: Double = base == .byte ? 1 : 8
        
        switch bytes {
        case 0..<1_000:
            return ("0", "K\(stringBase)/s")
        case 1_000..<(1_000 * 1_000):
            return (String(format: "%.0f", kilobytes*multiplier), "K\(stringBase)/s")
        case 1_000..<(1_000 * 1_000 * 100):
            return (String(format: "%.1f", megabytes*multiplier), "M\(stringBase)/s")
        case (1_000 * 1_000 * 100)..<(1_000 * 1_000 * 1_000):
            return (String(format: "%.0f", megabytes*multiplier), "M\(stringBase)/s")
        case (1_000 * 1_000 * 1_000)...Int64.max:
            return (String(format: "%.1f", gigabytes*multiplier), "G\(stringBase)/s")
        default:
            return (String(format: "%.0f", kilobytes*multiplier), "K\(stringBase)B/s")
        }
    }
    
    public func getReadableSpeed(base: DataSizeBase = .byte, omitUnits: Bool = false) -> String {
        let stringBase = base == .byte ? "B" : "b"
        let multiplier: Double = base == .byte ? 1 : 8
        
        switch bytes*Int64(multiplier) {
        case 0..<1_000:
            let unit = omitUnits ? "" : " K\(stringBase)/s"
            return "0\(unit)"
        case 1_000..<(1_000 * 1_000):
            let unit = omitUnits ? "" : " K\(stringBase)/s"
            return String(format: "%.0f\(unit)", kilobytes*multiplier)
        case 1_000..<(1_000 * 1_000 * 100):
            let unit = omitUnits ? "" : " M\(stringBase)/s"
            return String(format: "%.1f\(unit)", megabytes*multiplier)
        case (1_000 * 1_000 * 100)..<(1_000 * 1_000 * 1_000):
            let unit = omitUnits ? "" : " M\(stringBase)/s"
            return String(format: "%.0f\(unit)", megabytes*multiplier)
        case (1_000 * 1_000 * 1_000)...Int64.max:
            let unit = omitUnits ? "" : " G\(stringBase)/s"
            return String(format: "%.1f\(unit)", gigabytes*multiplier)
        default:
            let unit = omitUnits ? "" : " K\(stringBase)/s"
            return String(format: "%.0f\(unit)", kilobytes*multiplier)
        }
    }
    
    public func getReadableMemory(style: ByteCountFormatter.CountStyle = .file) -> String {
        let formatter: ByteCountFormatter = ByteCountFormatter()
        formatter.countStyle = style
        formatter.includesUnit = true
        formatter.isAdaptive = true
        
        var value = formatter.string(fromByteCount: Int64(self.bytes))
        if let idx = value.lastIndex(of: ",") {
            value.replaceSubrange(idx...idx, with: ".")
        }
        
        return value
    }
    
    public func toUnit(_ unit: SizeUnit) -> Double {
        switch unit {
        case .KB: return self.kilobytes
        case .MB: return self.megabytes
        case .GB: return self.gigabytes
        case .TB: return self.terabytes
        default: return Double(self.bytes)
        }
    }
}

public struct DiskSize {
    public let value: Int64
    
    public init(_ size: Int64) {
        self.value = size
    }
    
    public var kilobytes: Double {
        return Double(value) / 1_000
    }
    public var megabytes: Double {
        return kilobytes / 1_000
    }
    public var gigabytes: Double {
        return megabytes / 1_000
    }
    public var terabytes: Double {
        return gigabytes / 1_000
    }
    
    public func getReadableMemory() -> String {
        switch value {
        case 0..<1_000:
            return "0 KB"
        case 1_000..<(1_000 * 1_000):
            return String(format: "%.0f KB", kilobytes)
        case 1_000..<(1_000 * 1_000 * 1_000):
            return String(format: "%.0f MB", megabytes)
        case 1_000..<(1_000 * 1_000 * 1_000 * 1_000):
            return String(format: "%.1f GB", gigabytes)
        case (1_000 * 1_000 * 1_000 * 1_000)...Int64.max:
            return String(format: "%.1f TB", terabytes)
        default:
            return String(format: "%.0f KB", kilobytes)
        }
    }
}

public class LabelField: NSTextField {
    public init(frame: NSRect = NSRect.zero, _ label: String = "") {
        super.init(frame: frame)
        
        self.isEditable = false
        self.isSelectable = false
        self.isBezeled = false
        self.wantsLayer = true
        self.backgroundColor = .clear
        self.canDrawSubviewsIntoLayer = true
        
        self.stringValue = label
        self.textColor = .secondaryLabelColor
        self.alignment = .natural
        self.font = NSFont.systemFont(ofSize: 12, weight: .regular)
        
        self.cell?.truncatesLastVisibleLine = true
        self.cell?.usesSingleLineMode = true
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

public class ValueField: NSTextField {
    public init(frame: NSRect = NSRect.zero, _ value: String = "") {
        super.init(frame: frame)
        
        self.isEditable = false
        self.isSelectable = false
        self.isBezeled = false
        self.wantsLayer = true
        self.backgroundColor = .clear
        self.canDrawSubviewsIntoLayer = true
        
        self.stringValue = value
        self.textColor = .textColor
        self.alignment = .right
        self.font = NSFont.systemFont(ofSize: 13, weight: .regular)
        
        self.cell?.usesSingleLineMode = true
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

public extension NSBezierPath {
    func addArrow(start: CGPoint, end: CGPoint, pointerLineLength: CGFloat, arrowAngle: CGFloat) {
        self.move(to: start)
        self.line(to: end)
        
        let startEndAngle = atan((end.y - start.y) / (end.x - start.x)) + ((end.x - start.x) < 0 ? CGFloat(Double.pi) : 0)
        let arrowLine1 = CGPoint(
            x: end.x + pointerLineLength * cos(CGFloat(Double.pi) - startEndAngle + arrowAngle),
            y: end.y - pointerLineLength * sin(CGFloat(Double.pi) - startEndAngle + arrowAngle)
        )
        let arrowLine2 = CGPoint(
            x: end.x + pointerLineLength * cos(CGFloat(Double.pi) - startEndAngle - arrowAngle),
            y: end.y - pointerLineLength * sin(CGFloat(Double.pi) - startEndAngle - arrowAngle)
        )
        
        self.line(to: arrowLine1)
        self.move(to: end)
        self.line(to: arrowLine2)
    }
}

public func separatorView(_ title: String, origin: NSPoint = NSPoint(x: 0, y: 0), width: CGFloat = 0) -> NSView {
    let view: NSView = NSView(frame: NSRect(x: origin.x, y: origin.y, width: width, height: 30))
    view.heightAnchor.constraint(equalToConstant: view.bounds.height).isActive = true
    
    let labelView: NSTextField = TextView(frame: NSRect(x: 0, y: (view.frame.height-15)/2, width: view.frame.width, height: 15))
    labelView.stringValue = title
    labelView.alignment = .center
    labelView.textColor = .secondaryLabelColor
    labelView.font = NSFont.systemFont(ofSize: 12, weight: .medium)
    
    view.addSubview(labelView)
    
    return view
}

public func popupRow(_ view: NSView, title: String, value: String) -> (LabelField, ValueField, NSView) {
    let rowView: NSView = NSView(frame: NSRect(x: 0, y: 0, width: view.frame.width, height: 22))
    
    let labelWidth = title.widthOfString(usingFont: .systemFont(ofSize: 12, weight: .regular)) + 4
    let labelView: LabelField = LabelField(frame: NSRect(x: 0, y: (22-16)/2, width: labelWidth, height: 16), title)
    let valueView: ValueField = ValueField(frame: NSRect(x: labelWidth, y: (22-16)/2, width: rowView.frame.width - labelWidth, height: 16), value)
    
    rowView.addSubview(labelView)
    rowView.addSubview(valueView)
    
    if let view = view as? NSStackView {
        rowView.heightAnchor.constraint(equalToConstant: rowView.bounds.height).isActive = true
        view.addArrangedSubview(rowView)
    } else {
        view.addSubview(rowView)
    }
    
    return (labelView, valueView, rowView)
}

public func portalRow(_ v: NSStackView, title: String, value: String = "", isSelectable: Bool = false) -> (LabelField, ValueField, NSStackView) {
    let view: NSStackView = NSStackView()
    view.orientation = .horizontal
    view.distribution = .fillProportionally
    view.spacing = 1
    
    let labelView: LabelField = LabelField(title)
    labelView.font = NSFont.systemFont(ofSize: 11, weight: .regular)
    
    let valueView: ValueField = ValueField(value)
    valueView.isSelectable = isSelectable
    valueView.font = NSFont.systemFont(ofSize: 12, weight: .regular)
    
    view.addArrangedSubview(labelView)
    view.addArrangedSubview(NSView())
    view.addArrangedSubview(valueView)
    
    v.addArrangedSubview(view)
    
    view.widthAnchor.constraint(equalTo: v.widthAnchor).isActive = true
    
    return (labelView, valueView, view)
}

public func popupWithColorRow(_ view: NSView, color: NSColor, title: String, value: String) -> (NSView, LabelField, ValueField) {
    let rowView: NSView = NSView(frame: NSRect(x: 0, y: 0, width: view.frame.width, height: 22))
    
    let colorView: NSView = NSView(frame: NSRect(x: 2, y: 5, width: 12, height: 12))
    colorView.wantsLayer = true
    colorView.layer?.backgroundColor = color.cgColor
    colorView.layer?.cornerRadius = 2
    let labelWidth = min(180, title.widthOfString(usingFont: .systemFont(ofSize: 13, weight: .regular)) + 5)
    let labelView: LabelField = LabelField(frame: NSRect(x: 18, y: (22-16)/2, width: labelWidth, height: 16), title)
    let valueView: ValueField = ValueField(frame: NSRect(x: 18 + labelWidth, y: (22-16)/2, width: rowView.frame.width - labelWidth - 18, height: 16), value)
    
    rowView.addSubview(colorView)
    rowView.addSubview(labelView)
    rowView.addSubview(valueView)
    
    if let view = view as? NSStackView {
        rowView.heightAnchor.constraint(equalToConstant: rowView.bounds.height).isActive = true
        view.addArrangedSubview(rowView)
    } else {
        view.addSubview(rowView)
    }
    
    return (colorView, labelView, valueView)
}

public func portalWithColorRow(_ v: NSStackView, color: NSColor, title: String) -> (NSView, ValueField) {
    let view: NSStackView = NSStackView()
    view.orientation = .horizontal
    view.distribution = .fillProportionally
    view.spacing = 1
    
    let colorView: NSView = NSView()
    colorView.widthAnchor.constraint(equalToConstant: 5).isActive = true
    colorView.wantsLayer = true
    colorView.layer?.backgroundColor = color.cgColor
    colorView.layer?.cornerRadius = 2
    
    let labelView: LabelField = LabelField(title)
    labelView.font = NSFont.systemFont(ofSize: 11, weight: .regular)
    
    let valueView: ValueField = ValueField()
    valueView.font = NSFont.systemFont(ofSize: 12, weight: .regular)
    valueView.widthAnchor.constraint(equalToConstant: 40).isActive = true
    
    view.addArrangedSubview(colorView)
    view.addArrangedSubview(labelView)
    view.addArrangedSubview(NSView())
    view.addArrangedSubview(valueView)
    
    v.addArrangedSubview(view)
    
    view.widthAnchor.constraint(equalTo: v.widthAnchor).isActive = true
    
    return (colorView, valueView)
}

public extension Array where Element: Hashable {
    func difference(from other: [Element]) -> [Element] {
        let thisSet = Set(self)
        let otherSet = Set(other)
        return Array(thisSet.symmetricDifference(otherSet))
    }
}

public func toggleNSControlState(_ control: NSControl?, state: NSControl.StateValue) {
    if #available(OSX 10.15, *) {
        if let checkbox = control as? NSSwitch {
            checkbox.state = state
        }
    } else {
        if let checkbox = control as? NSButton {
            checkbox.state = state
        }
    }
}

public func asyncShell(_ args: String) {
    let task = Process()
    task.launchPath = "/bin/sh"
    task.arguments = ["-c", args]
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
}

public func syncShell(_ args: String) -> String {
    let task = Process()
    task.launchPath = "/bin/sh"
    task.arguments = ["-c", args]
    let pipe = Pipe()
    
    task.standardOutput = pipe
    task.launch()
    task.waitUntilExit()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    
    return output
}

public func isNewestVersion(currentVersion: String, latestVersion: String) -> Bool {
    let currentNumber = currentVersion.replacingOccurrences(of: "v", with: "")
    let latestNumber = latestVersion.replacingOccurrences(of: "v", with: "")
    
    let currentArray = currentNumber.condenseWhitespace().split(separator: ".")
    let latestArray = latestNumber.condenseWhitespace().split(separator: ".")
    
    var current = Version(major: Int(currentArray[0]) ?? 0, minor: Int(currentArray[1]) ?? 0, patch: Int(currentArray[2]) ?? 0)
    var latest = Version(major: Int(latestArray[0]) ?? 0, minor: Int(latestArray[1]) ?? 0, patch: Int(latestArray[2]) ?? 0)
    
    if let patch = currentArray.last, patch.contains("-") {
        let arr = patch.split(separator: "-")
        if let patchNumber = arr.first {
            current.patch = Int(patchNumber) ?? 0
        }
        if let beta = arr.last {
            current.beta = Int(beta.replacingOccurrences(of: "beta", with: "")) ?? 0
        }
    }
    
    if let patch = latestArray.last, patch.contains("-") {
        let arr = patch.split(separator: "-")
        if let patchNumber = arr.first {
            latest.patch = Int(patchNumber) ?? 0
        }
        if let beta = arr.last {
            latest.beta = Int(beta.replacingOccurrences(of: "beta", with: "")) ?? 0
        }
    }
    
    // current is not beta + latest is not beta
    if current.beta == nil && latest.beta == nil {
        if latest.major > current.major {
            return true
        }
        
        if latest.minor > current.minor && latest.major >= current.major {
            return true
        }
        
        if latest.patch > current.patch && latest.minor >= current.minor && latest.major >= current.major {
            return true
        }
    }
    
    // current version is beta + last version is not beta
    if current.beta != nil && latest.beta == nil {
        if latest.major > current.major {
            return true
        }
        
        if latest.minor > current.minor && latest.major >= current.major {
            return true
        }
        
        if latest.patch >= current.patch && latest.minor >= current.minor && latest.major >= current.major {
            return true
        }
    }
    
    // current version is beta + last version is beta
    if current.beta != nil && latest.beta != nil {
        if latest.major > current.major {
            return true
        }
        
        if latest.minor > current.minor && latest.major >= current.major {
            return true
        }
        
        if latest.patch >= current.patch && latest.minor >= current.minor && latest.major >= current.major {
            return true
        }
        
        if latest.beta! > current.beta! && latest.patch >= current.patch && latest.minor >= current.minor && latest.major >= current.major {
            return true
        }
    }
    
    return false
}

public func showNotification(title: String, subtitle: String? = nil, userInfo: [AnyHashable: Any] = [:], delegate: UNUserNotificationCenterDelegate? = nil) -> String {
    let id = UUID().uuidString
    
    let content = UNMutableNotificationContent()
    content.title = title
    if let value = subtitle {
        content.subtitle = value
    }
    content.userInfo = userInfo
    content.sound = UNNotificationSound.default
    
    let request = UNNotificationRequest(identifier: id, content: content, trigger: nil)
    let center = UNUserNotificationCenter.current()
    center.delegate = delegate
    
    center.requestAuthorization(options: [.alert, .sound]) { _, _ in }
    center.add(request) { (error: Error?) in
        if let err = error {
            print(err)
        }
    }
    
    return id
}

public func removeNotification(_ id: String) {
    let center = UNUserNotificationCenter.current()
    center.removeDeliveredNotifications(withIdentifiers: [id])
}

public struct TopProcess: Codable, Process_p {
    public var pid: Int
    public var name: String
    public var usage: Double
    public var icon: NSImage {
        get {
            if let app = NSRunningApplication(processIdentifier: pid_t(self.pid)), let icon = app.icon {
                return icon
            }
            return Constants.defaultProcessIcon
        }
    }
    
    public init(pid: Int, name: String, usage: Double) {
        self.pid = pid
        self.name = name
        self.usage = usage
    }
}

public func fetchIOService(_ name: String) -> [NSDictionary]? {
    var iterator: io_iterator_t = io_iterator_t()
    var obj: io_registry_entry_t = 1
    var list: [NSDictionary] = []
    
    let result = IOServiceGetMatchingServices(kIOMasterPortDefault, IOServiceMatching(name), &iterator)
    if result != kIOReturnSuccess {
        print("Error IOServiceGetMatchingServices(): " + (String(cString: mach_error_string(result), encoding: String.Encoding.ascii) ?? "unknown error"))
        return nil
    }
    
    while obj != 0 {
        obj = IOIteratorNext(iterator)
        if let props = getIOProperties(obj) {
            list.append(props)
        }
        IOObjectRelease(obj)
    }
    IOObjectRelease(iterator)
    
    return list.isEmpty ? nil : list
}

public func getIOProperties(_ entry: io_registry_entry_t) -> NSDictionary? {
    var properties: Unmanaged<CFMutableDictionary>? = nil
    
    if IORegistryEntryCreateCFProperties(entry, &properties, kCFAllocatorDefault, 0) != kIOReturnSuccess {
        return nil
    }
    
    defer {
        properties?.release()
    }
    
    return properties?.takeUnretainedValue()
}

internal func getIOName(_ entry: io_registry_entry_t) -> String? {
    let pointer = UnsafeMutablePointer<io_name_t>.allocate(capacity: 1)
    defer { pointer.deallocate() }
    
    let result = IORegistryEntryGetName(entry, pointer)
    if result != kIOReturnSuccess {
        print("Error IORegistryEntryGetName(): " + (String(cString: mach_error_string(result), encoding: String.Encoding.ascii) ?? "unknown error"))
        return nil
    }
    
    return String(cString: UnsafeRawPointer(pointer).assumingMemoryBound(to: CChar.self))
}

internal func convertCFDataToArr(_ data: CFData, _ isM4: Bool = false) -> [Int32] {
    let length = CFDataGetLength(data)
    var bytes = [UInt8](repeating: 0, count: length)
    CFDataGetBytes(data, CFRange(location: 0, length: length), &bytes)
    
    var multiplier: UInt32 = 1000 * 1000
    if isM4 {
        multiplier = 1000
    }
    
    var arr: [Int32] = []
    var chunks = stride(from: 0, to: bytes.count, by: 8).map { Array(bytes[$0..<min($0 + 8, bytes.count)])}
    for chunk in chunks {
        let v = UInt32(chunk[0]) | UInt32(chunk[1]) << 8 | UInt32(chunk[2]) << 16 | UInt32(chunk[3]) << 24
        arr.append(Int32(v / multiplier))
    }
    bytes.removeAll()
    chunks.removeAll()
    
    return arr
}

public class ColorView: NSView {
    public var inactiveColor: NSColor = NSColor.lightGray.withAlphaComponent(0.75)
    
    private var color: NSColor
    private var state: Bool
    
    public init(frame: NSRect = NSRect.zero, color: NSColor, state: Bool = false, radius: CGFloat = 2) {
        self.color = color
        self.state = state
        
        super.init(frame: frame)
        
        self.wantsLayer = true
        self.layer?.backgroundColor = (state ? self.color : inactiveColor).cgColor
        self.layer?.cornerRadius = radius
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public func setState(_ newState: Bool) {
        if newState != state {
            self.layer?.backgroundColor = (newState ? self.color : inactiveColor).cgColor
            self.state = newState
        }
    }
    
    public func setColor(_ newColor: NSColor) {
        guard self.color != newColor else { return }
        self.color = newColor
        self.layer?.backgroundColor = newColor.cgColor
    }
}

public func localizedString(_ key: String, _ params: String..., comment: String = "") -> String {
    var string = NSLocalizedString(key, comment: comment)
    if !params.isEmpty {
        for (index, param) in params.enumerated() {
            string = string.replacingOccurrences(of: "%\(index)", with: param)
        }
    }
    return string
}

public extension UnitTemperature {
    static var system: UnitTemperature {
        let measureFormatter = MeasurementFormatter()
        let measurement = Measurement(value: 0, unit: UnitTemperature.celsius)
        return measureFormatter.string(from: measurement).hasSuffix("C") ? .celsius : .fahrenheit
    }
    
    static var current: UnitTemperature {
        let stringUnit: String = Store.shared.string(key: "temperature_units", defaultValue: "system")
        var unit = UnitTemperature.system
        if stringUnit != "system" {
            if let value = TemperatureUnits.first(where: { $0.key == stringUnit }), let temperatureUnit = value.additional as? UnitTemperature {
                unit = temperatureUnit
            }
        }
        return unit
    }
}

public func temperature(_ value: Double, defaultUnit: UnitTemperature = UnitTemperature.celsius, fractionDigits: Int = 0) -> String {
    let formatter = MeasurementFormatter()
    formatter.locale = Locale.init(identifier: "en_US")
    formatter.numberFormatter.maximumFractionDigits = fractionDigits
    if fractionDigits != 0 {
        formatter.numberFormatter.minimumFractionDigits = fractionDigits
    }
    formatter.unitOptions = .providedUnit
    
    var measurement = Measurement(value: value, unit: defaultUnit)
    measurement.convert(to: UnitTemperature.current)
    
    return formatter.string(from: measurement)
}

public func sysctlByName(_ name: String) -> Int64 {
    var num: Int64 = 0
    var size = MemoryLayout<Int64>.size
    
    if sysctlbyname(name, &num, &size, nil, 0) != 0 {
        print(POSIXError.Code(rawValue: errno).map { POSIXError($0) } ?? CocoaError(.fileReadUnknown))
    }
    
    return num
}

internal class WidgetLabelView: NSView {
    private var title: String
    
    internal init(_ title: String, height: CGFloat) {
        self.title = title
        
        super.init(frame: NSRect(
            x: 0,
            y: 0,
            width: 6,
            height: height
        ))
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        
        let style = NSMutableParagraphStyle()
        style.alignment = .center
        let stringAttributes = [
            NSAttributedString.Key.font: NSFont.systemFont(ofSize: 7, weight: .regular),
            NSAttributedString.Key.foregroundColor: NSColor.textColor,
            NSAttributedString.Key.paragraphStyle: style
        ]
        
        let title = String(self.title.prefix(3)).uppercased().reversed()
        let letterHeight = self.frame.height / 3
        let letterWidth: CGFloat = self.frame.height / CGFloat(title.count)
        
        var yMargin: CGFloat = 0
        for char in title {
            let rect = CGRect(x: 0, y: yMargin, width: letterWidth, height: letterHeight-1)
            let str = NSAttributedString.init(string: "\(char)", attributes: stringAttributes)
            str.draw(with: rect)
            yMargin += letterHeight
        }
    }
}

public func process(path: String, arguments: [String]) -> String? {
    let task = Process()
    task.launchPath = path
    task.arguments = arguments
    
    let outputPipe = Pipe()
    defer {
        outputPipe.fileHandleForReading.closeFile()
    }
    task.standardOutput = outputPipe
    
    do {
        try task.run()
    } catch let error {
        debug("system_profiler SPMemoryDataType: \(error.localizedDescription)")
        return nil
    }
    
    let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: outputData, encoding: .utf8)
    guard let output, !output.isEmpty else { return nil }
    
    return output
}

public class SettingsContainerView: NSStackView {
    public init() {
        super.init(frame: NSRect.zero)
        self.translatesAutoresizingMaskIntoConstraints = false
        self.orientation = .vertical
        self.spacing = Constants.Settings.margin
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

public class SMCHelper {
    public static let shared = SMCHelper()
    
    public var isInstalled: Bool {
        syncShell("ls /Library/PrivilegedHelperTools/").contains("eu.exelban.Stats.SMC.Helper")
    }
    
    private var connection: NSXPCConnection? = nil
    
    public func setFanSpeed(_ id: Int, speed: Int) {
        guard let helper = self.helper(nil) else { return }
        helper.setFanSpeed(id: id, value: speed) { result in
            if let result, !result.isEmpty {
                NSLog("set fan speed: \(result)")
            }
        }
    }
    
    public func setFanMode(_ id: Int, mode: Int) {
        guard let helper = self.helper(nil) else { return }
        helper.setFanMode(id: id, mode: mode) { result in
            if let result, !result.isEmpty {
                NSLog("set fan mode: \(result)")
            }
        }
    }
    
    public func isActive() -> Bool {
        return self.connection != nil
    }
    
    public func checkForUpdate() {
        let helperURL = Bundle.main.bundleURL.appendingPathComponent("Contents/Library/LaunchServices/eu.exelban.Stats.SMC.Helper")
        guard let helperBundleInfo = CFBundleCopyInfoDictionaryForURL(helperURL as CFURL) as? [String: Any],
              let helperVersion = helperBundleInfo["CFBundleShortVersionString"] as? String,
              let helper = self.helper(nil) else { return }
        
        helper.version { installedHelperVersion in
            guard installedHelperVersion != helperVersion else { return }
            print("new version of SMC helper is detected, going to update...")
            self.uninstall(silent: true)
            self.install { installed in
                if installed {
                    print("the new version of SMC helper was successfully installed")
                } else {
                    print("error when installing a new version of the SMC helper")
                }
            }
        }
    }
    
    public func install(completion: @escaping (_ installed: Bool) -> Void) {
        var authRef: AuthorizationRef?
        var authStatus = AuthorizationCreate(nil, nil, [.preAuthorize], &authRef)
        
        guard authStatus == errAuthorizationSuccess else {
            print("Unable to get a valid empty authorization reference to load Helper daemon")
            completion(false)
            return
        }
        
        let authItem = kSMRightBlessPrivilegedHelper.withCString { authorizationString in
            AuthorizationItem(name: authorizationString, valueLength: 0, value: nil, flags: 0)
        }
        
        let pointer = UnsafeMutablePointer<AuthorizationItem>.allocate(capacity: 1)
        pointer.initialize(to: authItem)
        
        defer {
            pointer.deinitialize(count: 1)
            pointer.deallocate()
        }
        
        var authRights = AuthorizationRights(count: 1, items: pointer)
        
        let flags: AuthorizationFlags = [.interactionAllowed, .extendRights, .preAuthorize]
        authStatus = AuthorizationCreate(&authRights, nil, flags, &authRef)
        
        guard authStatus == errAuthorizationSuccess else {
            print("Unable to get a valid loading authorization reference to load Helper daemon")
            completion(false)
            return
        }
        
        var error: Unmanaged<CFError>?
        if SMJobBless(kSMDomainUserLaunchd, "eu.exelban.Stats.SMC.Helper" as CFString, authRef, &error) == false {
            let blessError = error!.takeRetainedValue() as Error
            print("Error while installing the Helper: \(blessError.localizedDescription)")
            completion(false)
            return
        }
        
        AuthorizationFree(authRef!, [])
        completion(true)
    }
    
    private func helperConnection() -> NSXPCConnection? {
        guard self.connection == nil else {
            return self.connection
        }
        
        let connection = NSXPCConnection(machServiceName: "eu.exelban.Stats.SMC.Helper", options: .privileged)
        connection.exportedObject = self
        connection.remoteObjectInterface = NSXPCInterface(with: HelperProtocol.self)
        connection.invalidationHandler = {
            self.connection?.invalidationHandler = nil
            OperationQueue.main.addOperation {
                self.connection = nil
            }
        }
        
        self.connection = connection
        self.connection?.resume()
        
        return self.connection
    }
    
    private func helper(_ completion: ((Bool) -> Void)?) -> HelperProtocol? {
        guard let helper = self.helperConnection() else {
            completion?(false)
            return nil
        }
        guard let service = helper.remoteObjectProxyWithErrorHandler({ error in
            print(error)
        }) as? HelperProtocol else {
            completion?(false)
            return nil
        }
        
        service.setSMCPath(Bundle.main.path(forResource: "smc", ofType: nil)!)
        
        return service
    }
    
    public func uninstall(silent: Bool = false) {
        if let count = SMC.shared.getValue("FNum") {
            for i in 0..<Int(count) {
                self.setFanMode(i, mode: 0)
            }
        }
        guard let helper = self.helper(nil) else { return }
        helper.uninstall()
        if !silent {
            NotificationCenter.default.post(name: .fanHelperState, object: nil, userInfo: ["state": false])
        }
    }
}

internal func grayscaleImage(_ image: NSImage) -> NSImage? {
    guard let cgImage = image.cgImage(forProposedRect: nil, context: nil, hints: nil) else {
        return nil
    }
    let bitmap = NSBitmapImageRep(cgImage: cgImage)
    
    guard let grayscale = bitmap.converting(to: .genericGray, renderingIntent: .default) else {
        return nil
    }
    let greyImage = NSImage(size: image.size)
    greyImage.addRepresentation(grayscale)
    
    return greyImage
}

public class ViewCopy: CALayer {
    public init(_ view: NSView) {
        super.init()
        
        guard let bitmap = view.bitmapImageRepForCachingDisplay(in: view.bounds) else { return }
        view.cacheDisplay(in: view.bounds, to: bitmap)
        
        frame = view.frame
        contents = bitmap.cgImage
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

public class EmptyView: NSStackView {
    public init(height: CGFloat = 120, isHidden: Bool = false, msg: String) {
        super.init(frame: NSRect())
        
        if height != 0 {
            self.heightAnchor.constraint(equalToConstant: height).isActive = true
        }
        
        self.translatesAutoresizingMaskIntoConstraints = true
        self.orientation = .vertical
        self.distribution = .fillEqually
        self.isHidden = isHidden
        self.identifier = NSUserInterfaceItemIdentifier(rawValue: "emptyView")
        
        let textView: NSTextView = NSTextView()
        if height != 0 {
            textView.heightAnchor.constraint(equalToConstant: ((height)/2)+6).isActive = true
        }
        textView.alignment = .center
        textView.isEditable = false
        textView.isSelectable = false
        textView.drawsBackground = false
        textView.string = msg
        
        self.addArrangedSubview(NSView())
        self.addArrangedSubview(textView)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

internal func saveNSStatusItemPosition(id: String) {
    let position = Store.shared.int(key: "NSStatusItem Preferred Position \(id)", defaultValue: -1)
    if position != -1 {
        Store.shared.set(key: "NSStatusItem Restore Position \(id)", value: position)
    }
}
internal func restoreNSStatusItemPosition(id: String) {
    let prevPosition = Store.shared.int(key: "NSStatusItem Restore Position \(id)", defaultValue: -1)
    if prevPosition != -1 {
        Store.shared.set(key: "NSStatusItem Preferred Position \(id)", value: prevPosition)
        Store.shared.remove("NSStatusItem Restore Position \(id)")
    }
}

public class AppIcon: NSView {
    public static let size: CGSize = CGSize(width: 16, height: 16)
    
    public init() {
        super.init(frame: NSRect(x: 0, y: 3, width: AppIcon.size.width, height: AppIcon.size.height))
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        
        guard let ctx = NSGraphicsContext.current?.cgContext else { return }
        ctx.setShouldAntialias(true)
        
        NSColor.textColor.set()
        NSBezierPath(roundedRect: NSRect(
            x: 0,
            y: 0,
            width: AppIcon.size.width,
            height: AppIcon.size.height
        ), xRadius: 4, yRadius: 4).fill()
        
        NSColor.controlTextColor.set()
        NSBezierPath(roundedRect: NSRect(
            x: 1.5,
            y: 1.5,
            width: AppIcon.size.width - 3,
            height: AppIcon.size.height - 3
        ), xRadius: 3, yRadius: 3).fill()
        
        let lineWidth = 1 / (NSScreen.main?.backingScaleFactor ?? 1) / 2
        let offset = lineWidth/2
        let zero = (AppIcon.size.height - 3 + 1.5)/2 + lineWidth
        let x = 1.5
        
        let downloadLine = drawLine(points: [
            (x+0, zero-offset),
            (x+1, zero-offset),
            (x+2, zero-offset-2.5),
            (x+3, zero-offset-4),
            (x+4, zero-offset),
            (x+5, zero-offset-2),
            (x+6, zero-offset),
            (x+7, zero-offset),
            (x+8, zero-offset-2),
            (x+9, zero-offset),
            (x+10, zero-offset-4),
            (x+11, zero-offset-0.5),
            (x+12, zero-offset)
        ], color: NSColor.systemBlue, lineWidth: lineWidth)
        
        let uploadLine = drawLine(points: [
            (x+0, zero+offset),
            (x+1, zero+offset),
            (x+2, zero+offset+2),
            (x+3, zero+offset),
            (x+4, zero+offset),
            (x+5, zero+offset),
            (x+6, zero+offset+3),
            (x+7, zero+offset+3),
            (x+8, zero+offset),
            (x+9, zero+offset+1),
            (x+10, zero+offset+5),
            (x+11, zero+offset),
            (x+12, zero+offset)
        ], color: NSColor.systemRed, lineWidth: lineWidth)
        
        ctx.saveGState()
        drawUnderLine(dirtyRect, path: downloadLine, color: NSColor.systemBlue, x: x, y: zero-offset)
        ctx.restoreGState()
        ctx.saveGState()
        drawUnderLine(dirtyRect, path: uploadLine, color: NSColor.systemRed, x: x, y: zero+offset)
        ctx.restoreGState()
    }
    
    private func drawLine(points: [(CGFloat, CGFloat)], color: NSColor, lineWidth: CGFloat) -> NSBezierPath {
        let linePath = NSBezierPath()
        linePath.move(to: CGPoint(x: points[0].0, y: points[0].1))
        for i in 1..<points.count {
            linePath.line(to: CGPoint(x: points[i].0, y: points[i].1))
        }
        color.setStroke()
        linePath.lineWidth = lineWidth
        linePath.stroke()
        return linePath
    }
    
    private func drawUnderLine(_ rect: NSRect, path: NSBezierPath, color: NSColor, x: CGFloat, y: CGFloat) {
        let underLinePath = path.copy() as! NSBezierPath
        underLinePath.line(to: CGPoint(x: x, y: y))
        underLinePath.line(to: CGPoint(x: x, y: y))
        underLinePath.close()
        underLinePath.addClip()
        color.withAlphaComponent(0.5).setFill()
        NSBezierPath(rect: rect).fill()
    }
}

public func controlState(_ sender: NSControl) -> Bool {
    var state: NSControl.StateValue
    
    if #available(OSX 10.15, *) {
        state = sender is NSSwitch ? (sender as! NSSwitch).state : .off
    } else {
        state = sender is NSButton ? (sender as! NSButton).state : .off
    }
    
    return state == .on
}

@available(macOS 11.0, *)
public func iconFromSymbol(name: String, scale: NSImage.SymbolScale) -> NSImage? {
    let config = NSImage.SymbolConfiguration(textStyle: .body, scale: scale)
    if let symbol = NSImage(systemSymbolName: name, accessibilityDescription: nil) {
        return symbol.withSymbolConfiguration(config)
    }
    return nil
}

public func showAlert(_ message: String, _ information: String? = nil, _ style: NSAlert.Style = .informational) {
    let alert = NSAlert()
    alert.messageText = message
    if let information = information {
        alert.informativeText = information
    }
    alert.addButton(withTitle: "OK")
    alert.alertStyle = style
    alert.runModal()
}

var isDarkMode: Bool {
    switch NSAppearance.current.name {
    case .darkAqua, .vibrantDark, .accessibilityHighContrastDarkAqua, .accessibilityHighContrastVibrantDark:
        return true
    default:
        return false
    }
}

public class PreferencesSection: NSStackView {
    private let container: NSStackView = NSStackView()
    
    public init(label: String = "", id: String? = nil, _ components: [NSView] = []) {
        super.init(frame: .zero)
        
        self.orientation = .vertical
        self.spacing = 0
        if let id {
            self.identifier = NSUserInterfaceItemIdentifier(id)
        }
        
        if label != "" {
            self.addLabel(label)
        }
        
        self.container.orientation = .vertical
        self.container.wantsLayer = true
        self.container.layer?.cornerRadius = 5
        self.container.layer?.borderColor = NSColor.separatorColor.withAlphaComponent(0.05).cgColor
        self.container.layer?.borderWidth = 1
        self.container.layer?.backgroundColor = NSColor.quaternaryLabelColor.withAlphaComponent(0.025).cgColor
        self.container.edgeInsets = NSEdgeInsets(
            top: Constants.Settings.margin/2,
            left: Constants.Settings.margin,
            bottom: Constants.Settings.margin/2,
            right: Constants.Settings.margin
        )
        self.container.spacing = Constants.Settings.margin/2
        self.addArrangedSubview(self.container)
        
        for item in components {
            self.add(item)
        }
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func updateLayer() {
        self.container.layer?.borderColor = NSColor.separatorColor.withAlphaComponent(0.05).cgColor
        self.container.layer?.backgroundColor = NSColor.quaternaryLabelColor.withAlphaComponent(0.025).cgColor
    }
    
    private func addLabel(_ value: String) {
        let view = NSStackView()
        view.heightAnchor.constraint(equalToConstant: 26).isActive = true
        
        let space = NSView()
        space.widthAnchor.constraint(equalToConstant: 4).isActive = true
        
        let field: NSTextField = TextView()
        field.font = NSFont.systemFont(ofSize: 12, weight: .semibold)
        field.stringValue = value
        
        view.addArrangedSubview(space)
        view.addArrangedSubview(field)
        view.addArrangedSubview(NSView())
        
        self.addArrangedSubview(view)
    }
    
    public func add(_ view: NSView) {
        if !self.container.subviews.isEmpty {
            self.container.addArrangedSubview(PreferencesSeparator())
        }
        self.container.addArrangedSubview(view)
    }
    
    public func delete(_ id: String) {
        let views = self.container.subviews
        views.enumerated().forEach { (i, v) in
            guard v.identifier?.rawValue == id else { return }
            if self.container.subviews.indices.contains(i-1) {
                let prev = self.container.subviews[i-1]
                if prev.identifier?.rawValue == "PreferencesSeparator" {
                    prev.removeFromSuperview()
                }
            }
            v.removeFromSuperview()
        }
    }
    
    public func contains(_ id: String) -> Bool {
        self.container.subviews.contains(where: { $0.identifier?.rawValue == id })
    }
    
    public func setRowVisibility(_ at: Int, newState: Bool) {
        if at == 0 {
            self.container.subviews[0].isHidden = !newState
            if self.container.subviews.count > 1 {
                self.container.subviews[1].isHidden = !newState
            }
            return
        }
        for i in self.container.subviews.indices where i/2 == at && Double(i).remainder(dividingBy: 2) == 0 {
            self.container.subviews[i-1].isHidden = !newState
            self.container.subviews[i].isHidden = !newState
        }
    }
    public func setRowVisibility(_ id: String, newState: Bool) {
        guard let at = self.container.subviews.firstIndex(where: { $0.identifier?.rawValue == id }) else { return }
        self.setRowVisibility(at/2, newState: newState)
    }
    public func setRowVisibility(_ row: PreferencesRow, newState: Bool) {
        guard let at = self.container.subviews.firstIndex(where: { $0 == row }) else { return }
        self.setRowVisibility(at/2, newState: newState)
    }
    
    public func findRow(_ id: String) -> PreferencesRow? {
        let rows: [PreferencesRow] = self.container.subviews.filter({ $0 is PreferencesRow }).compactMap({ $0 as? PreferencesRow })
        return rows.first(where: { $0.identifier?.rawValue == id })
    }
}

private class PreferencesSeparator: NSView {
    public init() {
        super.init(frame: .zero)
        self.wantsLayer = true
        self.layer?.backgroundColor = NSColor.separatorColor.withAlphaComponent(0.05).cgColor
        self.heightAnchor.constraint(equalToConstant: 1).isActive = true
        self.identifier = NSUserInterfaceItemIdentifier("PreferencesSeparator")
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func updateLayer() {
        self.layer?.backgroundColor = NSColor.separatorColor.withAlphaComponent(0.05).cgColor
    }
}

public class PreferencesRow: NSStackView {
    private var helpCallback: (() -> Void)?
    
    public init(_ title: String? = nil, _ description: String? = nil, id: String? = nil, component: NSView, help: (() -> Void)? = nil) {
        self.helpCallback = help
        
        super.init(frame: .zero)
        
        self.orientation = .horizontal
        self.distribution = .fill
        self.alignment = .centerY
        self.edgeInsets = NSEdgeInsets(top: Constants.Settings.margin/2, left: 0, bottom: (Constants.Settings.margin/2) - 1, right: 0)
        self.spacing = 0
        if let id {
            self.identifier = NSUserInterfaceItemIdentifier(id)
        }
        
        self.addArrangedSubview(self.text(title, description))
        if help != nil {
            let helpBtn = NSButton()
            helpBtn.bezelStyle = .helpButton
            helpBtn.controlSize = .small
            helpBtn.title = ""
            helpBtn.action = #selector(self.help)
            helpBtn.target = self
            let space = NSView()
            space.widthAnchor.constraint(equalToConstant: 5).isActive = true
            self.addArrangedSubview(space)
            self.addArrangedSubview(helpBtn)
        }
        self.addArrangedSubview(NSView())
        self.addArrangedSubview(component)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public func replaceComponent(with view: NSView) {
        self.subviews.removeLast()
        self.addArrangedSubview(view)
    }
    
    fileprivate func text(_ title: String? = nil, _ description: String? = nil) -> NSView {
        let view: NSStackView = NSStackView()
        view.orientation = .vertical
        view.spacing = 0
        
        if let title {
            let field: NSTextField = TextView()
            field.font = NSFont.systemFont(ofSize: 12, weight: .regular)
            field.stringValue = title
            view.addArrangedSubview(field)
        }
        
        if let description {
            let field: NSTextField = TextView()
            field.font = NSFont.systemFont(ofSize: 12, weight: .regular)
            field.textColor = .secondaryLabelColor
            field.stringValue = description
            view.addArrangedSubview(field)
            view.addArrangedSubview(NSView())
            view.alignment = .leading
        }
        
        return view
    }
    
    @objc private func help() {
        self.helpCallback?()
    }
}

public func restartApp(_ sender: Any, afterDelay seconds: TimeInterval = 0.5) -> Never {
    let task = Process()
    task.launchPath = "/bin/sh"
    task.arguments = ["-c", "sleep \(seconds); open \"\(Bundle.main.bundlePath)\""]
    task.launch()
    NSApp.terminate(sender)
    exit(0)
}

public class StepperInput: NSStackView, NSTextFieldDelegate, PreferencesSwitchWith_p {
    private var callback: ((Int) -> Void)
    private var unitCallback: ((KeyValue_p) -> Void)
    
    private let valueView: NSTextField = NSTextField()
    private let stepperView: NSStepper = NSStepper()
    private var symbolView: NSTextField? = nil
    private var unitsView: NSPopUpButton? = nil
    
    private let range: NSRange?
    private var units: [KeyValue_p]? = nil
    
    private var _isEnabled: Bool = true
    public var isEnabled: Bool {
        get { self._isEnabled }
        set {
            self.valueView.isEnabled = newValue
            self.stepperView.isEnabled = newValue
            self.symbolView?.isEnabled = newValue
            self.unitsView?.isEnabled = newValue
            self._isEnabled = newValue
        }
    }
    
    public init(
        _ value: Int,
        range: NSRange = NSRange(location: 1, length: 99),
        unit: String = "%",
        visibileUnit: Bool = true,
        units: [KeyValue_p]? = nil,
        callback: @escaping (Int) -> Void = {_ in },
        unitCallback: @escaping (KeyValue_p) -> Void = {_ in }
    ) {
        self.range = range
        self.callback = callback
        self.unitCallback = unitCallback
        
        super.init(frame: .zero)
        
        self.orientation = .horizontal
        self.spacing = 2
        
        self.valueView.font = NSFont.systemFont(ofSize: 12, weight: .regular)
        self.valueView.textColor = .textColor
        self.valueView.isEditable = true
        self.valueView.isSelectable = true
        self.valueView.usesSingleLineMode = true
        self.valueView.maximumNumberOfLines = 1
        self.valueView.focusRingType = .none
        self.valueView.delegate = self
        self.valueView.stringValue = "\(value)"
        self.valueView.translatesAutoresizingMaskIntoConstraints = false
        
        self.stepperView.font = NSFont.systemFont(ofSize: 12, weight: .regular)
        self.stepperView.doubleValue = Double(value)/100
        self.stepperView.minValue = Double(range.lowerBound)/100
        self.stepperView.maxValue = Double(range.upperBound)/100
        self.stepperView.increment = 0.01
        self.stepperView.valueWraps = false
        self.stepperView.target = self
        self.stepperView.action = #selector(self.onStepperChange)
        
        self.addArrangedSubview(self.valueView)
        self.addArrangedSubview(self.stepperView)
        
        if units == nil {
            if unit == "%" {
                self.widthAnchor.constraint(equalToConstant: 68).isActive = true
            }
            if visibileUnit {
                let symbol: NSTextField = LabelField(unit)
                symbol.textColor = .textColor
                self.addArrangedSubview(symbol)
                self.symbolView = symbol
            }
        } else if let units {
            self.units = units
            self.unitsView = selectView(
                action: #selector(self.onUnitChange),
                items: units,
                selected: unit
            )
            self.addArrangedSubview(self.unitsView!)
            self.widthAnchor.constraint(equalToConstant: 124).isActive = true
        }
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public func controlTextDidChange(_ obj: Notification) {
        guard let field = obj.object as? NSTextField else { return }
        let filtered = field.stringValue.filter{"0123456789".contains($0)}
        if filtered != field.stringValue {
            field.stringValue = filtered
        }
        guard var v = Int(field.stringValue) else { return }
        
        if let range = self.range {
            if v > range.upperBound {
                field.stringValue = "\(range.upperBound)"
                v = range.upperBound
            } else if v < range.lowerBound {
                field.stringValue = "\(range.lowerBound)"
                v = range.lowerBound
            }
        }
        
        self.callback(v)
    }
    
    @objc private func onStepperChange(_ sender: NSStepper) {
        let value = Int(sender.doubleValue*100)
        self.valueView.stringValue = "\(value)"
        self.callback(value)
    }
    
    @objc private func onUnitChange(_ sender: NSMenuItem) {
        guard let key = sender.representedObject as? String, let units = self.units,
              let value = units.first(where: { $0.key == key }) else { return }
        self.unitCallback(value)
    }
}

public protocol PreferencesSwitchWith_p: NSView {
    var isEnabled: Bool { get set }
}
extension NSPopUpButton: PreferencesSwitchWith_p {}
extension NSTextField: PreferencesSwitchWith_p {}
public class PreferencesSwitch: NSStackView {
    private let action: (_ sender: NSControl) -> Void
    private let with: PreferencesSwitchWith_p
    
    public init(action: @escaping (_ sender: NSControl) -> Void, state: Bool, with: PreferencesSwitchWith_p) {
        self.action = action
        self.with = with
        
        super.init(frame: .zero)
        
        self.orientation = .horizontal
        self.alignment = .centerY
        self.spacing = Constants.Settings.margin
        
        let btn = switchView(action: #selector(self.callback), state: state)
        with.isEnabled = state
        
        self.addArrangedSubview(NSView())
        self.addArrangedSubview(btn)
        self.addArrangedSubview(with)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    @objc func callback(_ sender: NSControl) {
        self.action(sender)
        self.with.isEnabled = controlState(sender)
    }
}

public class HelpHUD: NSPanel {
    public init(_ text: String, origin: CGPoint = CGPoint(x: 0, y: 0), size: CGSize = CGSize(width: 420, height: 300)) {
        super.init(
            contentRect: NSRect(origin: origin, size: size),
            styleMask: [.hudWindow, .titled, .closable],
            backing: .buffered, defer: false
        )
        self.isFloatingPanel = true
        self.isMovableByWindowBackground = true
        self.level = .floating
        self.title = "Help"
        
        let webView = WKWebView()
        webView.setValue(false, forKey: "drawsBackground")
        webView.loadHTMLString("<html><body style='color: #ffffff;margin: 10px;'>\(text)</body></html>", baseURL: nil)
        self.contentView = webView
    }
    
    public func show() {
        self.makeKeyAndOrderFront(self)
        self.center()
    }
}

public class VerticallyCenteredTextFieldCell: NSTextFieldCell {
    public override func titleRect(forBounds rect: NSRect) -> NSRect {
        var titleRect = super.titleRect(forBounds: rect)
        let textSize = self.attributedStringValue.size()
        let verticalOffset = (rect.size.height - textSize.height) / 2.0
        titleRect.origin.y += verticalOffset
        return titleRect
    }
    
    public override func drawInterior(withFrame cellFrame: NSRect, in controlView: NSView) {
        let titleRect = self.titleRect(forBounds: cellFrame)
        self.attributedStringValue.draw(in: titleRect)
    }
}

public class CPUeStressTest {
    public var isRunning: Bool = false
    
    private var workers: [DispatchWorkItem] = []
    private let queue = DispatchQueue.global(qos: .background)
    
    public init() {}
    
    public func start() {
        guard !self.isRunning else { return }
        self.isRunning = true
        
        let efficientCoreCount: Int = Int(SystemKit.shared.device.info.cpu?.eCores ?? 2)
        self.workers.removeAll()
        
        for index in 0..<efficientCoreCount {
            let worker = DispatchWorkItem { [weak self] in
                self?.test(threadIndex: index)
            }
            self.workers.append(worker)
            self.queue.async(execute: worker)
        }
    }
    
    public func stop() {
        self.isRunning = false
        self.workers.forEach { $0.cancel() }
        self.workers.removeAll()
    }
    
    private func test(threadIndex: Int) {
        pthread_set_qos_class_self_np(QOS_CLASS_BACKGROUND, 0)
        var x: Double = 1.0
        while self.isRunning {
            x = sin(x) + cos(x)
            if x > 100000 { x = 1.0 }
            OSMemoryBarrier()
        }
    }
}

public class CPUpStressTest {
    public var isRunning = false
    
    private var workers: [DispatchWorkItem] = []
    private let queue = DispatchQueue.global(qos: .userInteractive)
    
    public init() {}
    
    public func start() {
        guard !self.isRunning else { return }
        self.isRunning = true
        
        let performanceCoreCount: Int = Int(SystemKit.shared.device.info.cpu?.pCores ?? 4)
        self.workers.removeAll()
        
        for index in 0..<performanceCoreCount {
            let worker = DispatchWorkItem { [weak self] in
                self?.test(threadIndex: index)
            }
            self.workers.append(worker)
            self.queue.async(execute: worker)
        }
    }
    
    public func stop() {
        self.isRunning = false
        self.workers.forEach { $0.cancel() }
        self.workers.removeAll()
    }
    
    private func test(threadIndex: Int) {
        pthread_set_qos_class_self_np(QOS_CLASS_USER_INTERACTIVE, 0)
        var x: Double = 1.0
        while self.isRunning {
            x = sin(x) + cos(x)
            if x > 100000 { x = 1.0 }
            OSMemoryBarrier()
        }
    }
}

public class GPUStressTest {
    public var isRunning = false
    
    private let device: MTLDevice
    private let commandQueue: MTLCommandQueue
    private let pipeline: MTLComputePipelineState
    private let dataSize = 50_000_000 // Large data size for GPU workload
    private var bufferA: MTLBuffer?
    private var bufferB: MTLBuffer?
    private var bufferC: MTLBuffer?
    
    public init?() {
        guard let device = MTLCreateSystemDefaultDevice(), let queue = device.makeCommandQueue() else {
            return nil
        }
        
        self.device = device
        self.commandQueue = queue
        
        let source = """
        #include <metal_stdlib>
        using namespace metal;
        kernel void full_load_kernel(const device float* inA [[buffer(0)]],
                                      const device float* inB [[buffer(1)]],
                                      device float* outC [[buffer(2)]],
                                      uint id [[thread_position_in_grid]]) {
            outC[id] = (inA[id] * inB[id]) + sin(inA[id]) + cos(inB[id]) + tan(inA[id]) + log(inB[id]);
        }
        """
        
        do {
            let library = try device.makeLibrary(source: source, options: nil)
            let function = library.makeFunction(name: "full_load_kernel")!
            self.pipeline = try device.makeComputePipelineState(function: function)
        } catch {
            return nil
        }
    }
    
    private func allocateMemory() {
        guard self.bufferA == nil, self.bufferB == nil, self.bufferC == nil else { return }
        
        self.bufferA = self.device.makeBuffer(length: self.dataSize * MemoryLayout<Float>.size, options: .storageModeShared)
        self.bufferB = self.device.makeBuffer(length: self.dataSize * MemoryLayout<Float>.size, options: .storageModeShared)
        self.bufferC = self.device.makeBuffer(length: self.dataSize * MemoryLayout<Float>.size, options: .storageModeShared)
        
        let dataA = [Float](repeating: 1.0, count: self.dataSize)
        let dataB = [Float](repeating: 2.0, count: self.dataSize)
        
        memcpy(self.bufferA?.contents(), dataA, dataA.count * MemoryLayout<Float>.size)
        memcpy(self.bufferB?.contents(), dataB, dataB.count * MemoryLayout<Float>.size)
    }
    
    private func freeMemory() {
        self.bufferA = nil
        self.bufferB = nil
        self.bufferC = nil
    }
    
    public func start() {
        guard !self.isRunning else { return }
        self.isRunning = true
        self.allocateMemory()
        
        DispatchQueue.global(qos: .userInitiated).async { [weak self] in
            self?.test()
        }
    }
    
    public func stop() {
        self.isRunning = false
        self.freeMemory()
    }
    
    private func test() {
        let threadGroupSize = MTLSize(width: 256, height: 1, depth: 1)
        let gridSize = MTLSize(width: self.dataSize, height: 1, depth: 1)
        
        while self.isRunning {
            guard let commandBuffer = self.commandQueue.makeCommandBuffer(),
                  let commandEncoder = commandBuffer.makeComputeCommandEncoder(),
                  let bufferA = self.bufferA, let bufferB = self.bufferB, let bufferC = self.bufferC else {
                break
            }
            
            commandEncoder.setComputePipelineState(self.pipeline)
            commandEncoder.setBuffer(bufferA, offset: 0, index: 0)
            commandEncoder.setBuffer(bufferB, offset: 0, index: 1)
            commandEncoder.setBuffer(bufferC, offset: 0, index: 2)
            commandEncoder.dispatchThreads(gridSize, threadsPerThreadgroup: threadGroupSize)
            commandEncoder.endEncoding()
            commandBuffer.commit()
            
            commandBuffer.waitUntilCompleted()
        }
    }
}