import SwiftUI

@main
struct NotepadApp: App {

    @StateObject private var doc = NotepadDocument()

    var body: some Scene {
        WindowGroup {
            ContentView(doc: doc)
        }
        .commands {

            CommandGroup(replacing: .newItem) {
                Button("開啟...") { doc.open() }
                    .keyboardShortcut("o", modifiers: .command)
                Button("儲存") { doc.save() }
                    .keyboardShortcut("s", modifiers: .command)
                Button("另存新檔...") { doc.save(isSaveAs: true) }
                    .keyboardShortcut("s", modifiers: [.command, .shift])
            }
            
            CommandMenu("檢視") {
                Menu("縮放") {
                    Button("放大") { }
                        .keyboardShortcut("+", modifiers: .command)
                    Button("縮小") { }
                        .keyboardShortcut("-", modifiers: .command)
                    Button("還原預設縮放") { }
                        .keyboardShortcut("0", modifiers: .command)
                }
            }

            CommandGroup(replacing: .help) {
                Button("關於 記事本") {
                    let alert = NSAlert()
                    alert.messageText = "記事本 v1.0"
                    alert.informativeText = "軟體開發：Kelvin Huang"
                    alert.runModal()
                }
            }
        }
    }
}