import AppKit
import SwiftUI

final class FloatingPanel: NSPanel {

    init(contentView: some View) {
        super.init(
            contentRect: NSRect(x: 0, y: 0, width: 440, height: 380),
            styleMask: [.titled, .closable, .fullSizeContentView, .nonactivatingPanel],
            backing: .buffered,
            defer: false
        )

        isFloatingPanel = true
        level = .floating
        titleVisibility = .hidden
        titlebarAppearsTransparent = true
        isMovableByWindowBackground = true
        isReleasedWhenClosed = false
        animationBehavior = .utilityWindow
        hidesOnDeactivate = false
        collectionBehavior = [.canJoinAllSpaces, .fullScreenAuxiliary]
        backgroundColor = .windowBackgroundColor

        self.contentView = NSHostingView(rootView: contentView)
        center()
    }

    override var canBecomeKey: Bool { true }

    override func cancelOperation(_ sender: Any?) {
        close()
    }
}