import AppKit
import SwiftUI

/// Appearance-aware colours for the panel.
///
/// Dark mode is pure black rather than the system window grey: the panel is a
/// full-height strip that sits beside your work, and the grey reads as a
/// half-lit window next to a dark editor or terminal.
enum Theme {
    static func isDark(_ appearance: NSAppearance) -> Bool {
        appearance.bestMatch(from: [.aqua, .darkAqua]) == .darkAqua
    }

    /// The panel's own background (also handed to the NSPanel so the area under
    /// the transparent titlebar matches).
    static let background = NSColor(name: nil) { appearance in
        isDark(appearance) ? .black : .windowBackgroundColor
    }

    /// Card background, kept subtle but visible against pure black.
    static let row = NSColor(name: nil) { appearance in
        isDark(appearance) ? NSColor(white: 1, alpha: 0.07) : NSColor(white: 0, alpha: 0.05)
    }

    /// Same colours for SwiftUI.
    static let backgroundSwiftUI = Color(nsColor: background)
    static let rowSwiftUI = Color(nsColor: row)
}