// The MIT License (MIT)
//
// Copyright (c) 2020–2023 Alexander Grebenyuk (github.com/kean).

#if os(macOS)
import AppKit
#else
import UIKit
#endif

import SwiftUI

// A set of typealias and APIs to make AppKit and UIKit more
// compatible with each other

struct Palette {
#if os(watchOS)
    static var red: UXColor { UXColor(Color.red) }
    static var pink: UXColor { UXColor(Color.pink) }
#else
    static var red: UXColor {
        UXColor.dynamic(light: Palette.lightRed, dark: Palette.darkRed)
    }
    
    private static let lightRed = UXColor(red: 196.0/255.0, green: 26.0/255.0, blue: 22.0/255.0, alpha: 1.0)
    private static let darkRed = UXColor(red: 252.0/255.0, green: 106.0/255.0, blue: 93.0/255.0, alpha: 1.0)
    
    static var pink: UXColor {
        UXColor.dynamic(light: Palette.lightPink, dark: Palette.darkPink)
    }
    
    private static let lightPink = UXColor(red: 155.0/255.0, green: 35.0/255.0, blue: 147.00/255.0, alpha: 1.0)
    private static let darkPink = UXColor(red: 252.0/255.0, green: 95.0/255.0, blue: 163.0/255.0, alpha: 1.0)
#endif
}

#if os(macOS)
typealias UXView = NSView
typealias UXColor = NSColor
typealias UXFont = NSFont
typealias UXTextView = NSTextView
typealias UXImage = NSImage
typealias UXPasteboard = NSPasteboard

extension NSColor {
    static var separator: NSColor { separatorColor }
    static var label: NSColor { labelColor }
    static var systemBackground: NSColor { windowBackgroundColor }
    static var secondaryLabel: NSColor { secondaryLabelColor }
    static var secondarySystemFill: NSColor { controlBackgroundColor }
    static var systemGray4: NSColor { systemGray.withAlphaComponent(0.7) }
    static var systemGray3: NSColor { systemGray.withAlphaComponent(0.8) }
    static var systemGray2: NSColor { systemGray.withAlphaComponent(0.9) }
}

extension NSColor {
    static func dynamic(light: NSColor, dark: NSColor) -> NSColor {
        NSColor(name: nil) {
            switch $0.name {
            case .darkAqua, .vibrantDark, .accessibilityHighContrastDarkAqua, .accessibilityHighContrastVibrantDark:
                return dark
            default:
                return light
            }
        }
    }
}

#else
#if os(iOS)
typealias UXView = UIView
#endif

typealias UXColor = UIColor
typealias UXFont = UIFont
typealias UXImage = UIImage

extension UIColor {
    static func dynamic(light: UIColor, dark: UIColor) -> UIColor {
#if !os(watchOS)
        UIColor {
            switch $0.userInterfaceStyle {
            case .dark:
                return dark
            default:
                return light
            }
        }
#else
        dark
#endif
    }
}

#endif

#if os(tvOS)
typealias UXTextView = UITextView
#elseif os(iOS)
typealias UXTextView = UITextView
typealias UXPasteboard = UIPasteboard
#endif

#if os(tvOS)
extension UIColor {
    static var systemBackground: UIColor { .white }
    static var systemGray2: UIColor { systemGray.withAlphaComponent(0.9) }
    static var systemGray3: UIColor { systemGray.withAlphaComponent(0.8) }
    static var systemGray4: UIColor { systemGray.withAlphaComponent(0.7) }
    static var controlBackgroundColor: UIColor { .clear }
}
#endif

#if os(watchOS)
extension UXColor {
    static let label = UIColor(Color.primary)
    static let secondaryLabel = UIColor(Color.secondary)
    static let systemOrange = UIColor(Color.orange)
    static let systemRed = UIColor(Color.red)
    static let systemBlue = UIColor(Color.blue)
    static let systemYellow = UIColor(Color.yellow)
    static let systemGreen = UIColor(Color.green)
    static let systemTeal = UIColor(Color.indigo) // not available
    static let systemPurple = UIColor(Color.purple)
    static var systemGray = UIColor(Color.gray)
    static var systemGray2: UIColor { systemGray.withAlphaComponent(0.9) }
    static var systemGray3: UIColor { systemGray.withAlphaComponent(0.8) }
    static var systemGray4: UIColor { systemGray.withAlphaComponent(0.7) }
}
#endif

// MARK: - NSTextView

#if os(iOS)
extension UITextView {
    var isAutomaticLinkDetectionEnabled: Bool {
        get { dataDetectorTypes.contains(.link) }
        set {
            if newValue {
                dataDetectorTypes.insert(.link)
            } else {
                dataDetectorTypes.remove(.link)
            }
        }
    }
}

func runHapticFeedback(_ type: UINotificationFeedbackGenerator.FeedbackType = .success) {
    UINotificationFeedbackGenerator().notificationOccurred(type)
}
#endif

func hideKeyboard() {
#if os(iOS)
    UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
#endif
}

#if os(macOS)
extension NSTextView {
    var attributedText: NSAttributedString? {
        get { nil }
        set { textStorage?.setAttributedString(newValue ?? NSAttributedString()) }
    }
    
    var text: String {
        get { string }
        set { string = newValue }
    }
}

enum NSHapticFeedabackTypePlaceholder {
    case success, warning, error
}

func runHapticFeedback(_ type: NSHapticFeedabackTypePlaceholder = .success) {
    // Do nothing
}
#endif

extension Image {
#if os(iOS) || os(watchOS) || os(tvOS)
    init(uxImage: UXImage) {
        self.init(uiImage: uxImage)
    }
#elseif os(macOS)
    init(uxImage: UXImage) {
        self.init(nsImage: uxImage)
    }
#endif
}

#if os(macOS)
extension NSPasteboard {
    var string: String? {
        get { string(forType: .string) ?? "" }
        set {
            guard let newValue = newValue else { return }
            declareTypes([.string], owner: nil)
            setString(newValue, forType: .string)
        }
    }
}

extension NSImage {
    var cgImage: CGImage? {
        cgImage(forProposedRect: nil, context: nil, hints: nil)
    }
}

#endif