// Apple-only learning file: iOS 17+ target with a suitable Xcode SDK.
// Not compiled or run in this Windows/Linux review.
import SwiftUI
import Security


struct DemoView: View {
    @State private var notice = "No Keychain operation"
    private var key: [String: Any] {
        [kSecClass as String: kSecClassGenericPassword, kSecAttrService as String: "BhyluWorkshopTeaching", kSecAttrAccount as String: "demo-only"]
    }
    var body: some View {
        VStack(spacing: 20) {
            Button("Add fake demo value") {
                var item = key
                item[kSecValueData as String] = Data("not-a-real-secret".utf8)
                item[kSecAttrAccessible as String] = kSecAttrAccessibleWhenUnlockedThisDeviceOnly
                notice = "Add status: \(SecItemAdd(item as CFDictionary, nil))"
            }
            Button("Check demo item exists") {
                var query = key; query[kSecReturnAttributes as String] = true
                var result: CFTypeRef?
                notice = "Lookup status: \(SecItemCopyMatching(query as CFDictionary, &result))"
            }
            Button("Delete only this demo item", role: .destructive) { notice = "Delete status: \(SecItemDelete(key as CFDictionary))" }
            Text(notice)
        }.padding()
    }
}

@main
struct WorkshopDemoApp: App {
    var body: some Scene { WindowGroup { DemoView() } }
}