import AppKit
import SwiftTerm
import SwiftUI

typealias ViewState = State

@main
struct ByreApp: App {
    @ViewState private var server = Server()

    var body: some Scene {
        Window("byre", id: "main") {
            SpikeView()
                .environment(server)
                .font(Fonts.font(13))
                .onAppear {
                    installCtrlMonitor(server)
                }
        }
        .commands {
            PasteboardCommands()
        }
    }
}

@MainActor
private func installCtrlMonitor(_ server: Server) {
    NSEvent.addLocalMonitorForEvents(matching: .keyDown) { event in
        let flags = event.modifierFlags.intersection(.deviceIndependentFlagsMask)
        guard flags.contains(.control), !flags.contains(.command), let key = event.charactersIgnoringModifiers, ["k", "p", "l", "s", "/"].contains(key) else {
            return event
        }
        if event.window?.firstResponder is TerminalView {
            server.log("ctrl-\(key) passed to the terminal")
            return event
        }
        server.log("ctrl-\(key) taken as a Go shortcut")
        return nil
    }
}