import AppKit
import SwiftUI

#if DEBUG
#error("debug builds are unsupported: build with mac/bundle.sh")
#endif

typealias ViewState = State

@MainActor
final class AppDelegate: NSObject, NSApplicationDelegate {
    var connection: Connection?
    private var quitting = false

    func applicationDidFinishLaunching(_ notification: Notification) {
        Notifier.shared.install()
    }

    func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
        false
    }

    func applicationShouldTerminate(_ sender: NSApplication) -> NSApplication.TerminateReply {
        guard let store = connection?.store, !quitting else {
            return .terminateNow
        }
        quitting = true
        var replied = false
        let reply = {
            if !replied {
                replied = true
                sender.reply(toApplicationShouldTerminate: true)
            }
        }
        Task {
            await store.stop()
            reply()
        }
        Task {
            try? await Task.sleep(for: .seconds(2))
            reply()
        }
        return .terminateLater
    }
}

@main
struct ByreApp: App {
    @NSApplicationDelegateAdaptor private var delegate: AppDelegate
    @ViewState private var connection = Connection()
    @ViewState private var overlays = Overlays()

    var body: some Scene {
        Window("byre", id: "main") {
            RootView()
                .environment(connection)
                .environment(overlays)
                .font(Fonts.font(13))
                .frame(minWidth: 640, minHeight: 400)
                .onAppear {
                    delegate.connection = connection
                }
        }
        .defaultSize(width: 1280, height: 820)
        .commands {
            CommandGroup(after: .appInfo) {
                Button("Change Server…") {
                    connection.changeServer()
                }
            }
            PasteboardCommands()
            CommandMenu("Go") {
                goButton("Switch Task", "k")
                goButton("Project", "p")
                goButton("Lead", "l")
                goButton("Merge", "s")
                Divider()
                goButton("Keyboard Shortcuts", "/")
            }
        }
    }

    private func goButton(_ label: String, _ key: String) -> some View {
        Button(label) {
            if let store = connection.store {
                runGo(key, store, overlays)
            }
        }
        .keyboardShortcut(KeyEquivalent(Character(key)))
        .disabled(connection.store == nil || overlays.dialogOpen)
    }
}