import SwiftUI

#if canImport(UIKit)
  import UIKit
#elseif canImport(AppKit)
  import AppKit
#endif

private enum AIPalette {
  #if canImport(UIKit)
    private static func dynamicColor(light: UIColor, dark: UIColor) -> Color {
      Color(
        UIColor { traits in
          traits.userInterfaceStyle == .dark ? dark : light
        })
    }

    private static func rgba(
      _ red: CGFloat,
      _ green: CGFloat,
      _ blue: CGFloat,
      _ alpha: CGFloat
    ) -> UIColor {
      UIColor(red: red / 255, green: green / 255, blue: blue / 255, alpha: alpha)
    }

    private static func color(light: UIColor, dark: UIColor) -> Color {
      dynamicColor(light: light, dark: dark)
    }

    static let canvas = color(light: rgba(245, 246, 248, 1), dark: rgba(6, 7, 9, 1))
    static let surface = color(light: rgba(255, 255, 255, 1), dark: rgba(18, 20, 24, 1))
    static let surfaceRaised = color(light: rgba(251, 252, 253, 1), dark: rgba(27, 30, 35, 1))
    static let control = color(light: rgba(243, 245, 247, 1), dark: rgba(26, 29, 34, 1))
    static let chrome = color(light: rgba(255, 255, 255, 0.82), dark: rgba(11, 12, 15, 0.82))
    static let ink = color(light: rgba(15, 18, 22, 1), dark: rgba(243, 245, 247, 1))
    static let muted = color(light: rgba(98, 107, 119, 1), dark: rgba(151, 160, 172, 1))
    static let line = color(light: rgba(227, 230, 234, 1), dark: rgba(255, 255, 255, 0.09))
    static let brand = color(light: rgba(13, 15, 18, 1), dark: rgba(8, 9, 11, 1))
    static let primary = color(light: rgba(17, 20, 25, 1), dark: rgba(220, 178, 111, 1))
    static let onPrimary = color(light: rgba(255, 255, 255, 1), dark: rgba(12, 14, 17, 1))
    static let danger = color(light: rgba(190, 65, 57, 1), dark: rgba(242, 124, 113, 1))
    static let onDanger = color(light: rgba(255, 255, 255, 1), dark: rgba(22, 9, 8, 1))
    static let warning = color(light: rgba(170, 111, 23, 1), dark: rgba(226, 166, 65, 1))
    static let success = color(light: rgba(50, 150, 101, 1), dark: rgba(103, 198, 148, 1))
  #elseif canImport(AppKit)
    static let canvas = Color(red: 0.953, green: 0.961, blue: 0.973)
    static let surface = Color.white
    static let control = Color(red: 0.969, green: 0.976, blue: 0.984)
    static let ink = Color(red: 0.110, green: 0.153, blue: 0.220)
    static let muted = Color(red: 0.435, green: 0.486, blue: 0.561)
    static let line = Color(red: 0.878, green: 0.898, blue: 0.922)
    static let brand = Color(red: 0.075, green: 0.118, blue: 0.188)
    static let surfaceRaised = Color(red: 0.984, green: 0.988, blue: 0.992)
    static let chrome = Color.white.opacity(0.82)
    static let onPrimary = Color.white
    static let onDanger = Color.white
    static let primary = Color(red: 0.067, green: 0.078, blue: 0.098)
    static let danger = Color(red: 0.745, green: 0.255, blue: 0.224)
    static let warning = Color(red: 0.667, green: 0.435, blue: 0.09)
    static let success = Color(red: 0.196, green: 0.588, blue: 0.396)
  #else
    private static func color(_ red: CGFloat, _ green: CGFloat, _ blue: CGFloat) -> Color {
      Color(red: red / 255, green: green / 255, blue: blue / 255)
    }

    static let canvas = color(243, 245, 248)
    static let surface = color(255, 255, 255)
    static let control = color(247, 249, 251)
    static let ink = color(28, 39, 56)
    static let muted = color(111, 124, 143)
    static let line = color(224, 229, 235)
    static let brand = color(19, 30, 48)
    static let surfaceRaised = color(251, 252, 253)
    static let chrome = color(255, 255, 255, 0.82)
    static let onPrimary = color(255, 255, 255)
    static let onDanger = color(255, 255, 255)
    static let primary = color(17, 20, 25)
    static let danger = color(190, 65, 57)
    static let warning = color(170, 111, 23)
    static let success = color(50, 150, 101)
  #endif
}

public enum AITheme {
  public static let canvas = AIPalette.canvas
  public static let surface = AIPalette.surface
  public static let surfaceRaised = AIPalette.surfaceRaised
  public static let control = AIPalette.control
  public static let chrome = AIPalette.chrome
  public static let ink = AIPalette.ink
  public static let muted = AIPalette.muted
  public static let line = AIPalette.line
  public static let brand = AIPalette.brand
  public static let primary = AIPalette.primary
  public static let onPrimary = AIPalette.onPrimary
  public static let danger = AIPalette.danger
  public static let onDanger = AIPalette.onDanger
  public static let warning = AIPalette.warning
  public static let success = AIPalette.success

  public static let buttonHeight: CGFloat = 48
  public static let compactButtonHeight: CGFloat = 44
  public static let largeButtonHeight: CGFloat = 56
  public static let toolbarButtonHeight: CGFloat = 44
  public static let iconButtonSize: CGFloat = 44
  public static let buttonRadius: CGFloat = 16
  public static let cardRadius: CGFloat = 22
  public static let inputRadius: CGFloat = 16
  public static let inputHeight: CGFloat = 52
  public static let segmentedControlHeight: CGFloat = 44
  public static let compactButtonMinWidth: CGFloat = 72
  public static let regularButtonMinWidth: CGFloat = 88
  public static let toolbarButtonMinWidth: CGFloat = 96
  public static let toolbarButtonWidth: CGFloat = 104
  public static let footerSecondaryButtonWidth: CGFloat = 104
  public static let listActionButtonWidth: CGFloat = 84
}