#if os(macOS)
  import AppKit
  import SwiftUI

  @MainActor final class MacChatWindow: NSObject, ObservableObject, NSWindowDelegate {
    @Published private(set) var isOpen = false
    let draft = ChatDraft()
    private var window: NSWindow?

    func open(call: Call) {
      if let window {
        window.makeKeyAndOrderFront(nil)
        return
      }
      let window = NSWindow(
        contentRect: NSRect(x: 0, y: 0, width: 380, height: 520),
        styleMask: [.titled, .closable, .miniaturizable, .resizable],
        backing: .buffered, defer: false)
      window.title = "Chat — \(call.title)"
      window.minSize = NSSize(width: 300, height: 300)
      window.isReleasedWhenClosed = false
      window.contentView = NSHostingView(
        rootView: ChatView(call: call, draft: draft)
          .padding(20).tint(CallsAppearance.accent))
      window.delegate = self
      self.window = window
      isOpen = true
      window.center()
      window.makeKeyAndOrderFront(nil)
    }

    func close() { window?.close() }

    func windowWillClose(_ notification: Notification) {
      window = nil
      isOpen = false
    }
  }
#endif