class CameraViewModel(private val grantManager: GrantManager) : ViewModel() {
    val cameraGrant = GrantHandler(
        grantManager = grantManager,
        grant = AppGrant.CAMERA,
        scope = viewModelScope
    )

    // Option A: Suspend function (Modern Coroutines)
    suspend fun startCapture() {
        val status = cameraGrant.requestSuspend()
        if (status == GrantStatus.GRANTED) {
            cameraEngine.start()
        }
    }

    // Option B: Flow-based (Reactive)
    val captureFlow = cameraGrant.requestFlow()
        .filter { it == GrantStatus.GRANTED }
        .onEach { cameraEngine.start() }
}

val scanFlow = grantFlow {
    // 1. First, we need Bluetooth
    val btStatus = bluetoothHandler.requestSuspend()
    
    // 2. If granted, we need Location (for scanning on some Android versions)
    if (btStatus == GrantStatus.GRANTED) {
        locationHandler.requestSuspend()
    }
}

@Composable
fun CameraScreen(viewModel: CameraViewModel) {
    // Automatically uses Material 3 BasicAlertDialog for a modern look
    GrantDialog(handler = viewModel.cameraGrant)

    Button(onClick = { viewModel.viewModelScope.launch { viewModel.startCapture() } }) {
        Text("Start Camera")
    }
}

// Use GrantAndServiceChecker to combine both worlds
class LocationViewModel(
    private val checker: GrantAndServiceChecker,
    private val grantManager: GrantManager
) : ViewModel() {

    fun startTracking() {
        viewModelScope.launch {
            when (val status = checker.checkLocationReady()) {
                LocationReadyStatus.Ready          -> sensor.start()
                LocationReadyStatus.ServiceDisabled -> _uiState.showEnableGPS()
                LocationReadyStatus.GrantDenied    -> requestPermission()
                LocationReadyStatus.BothRequired   -> _uiState.showTotalFailure()
            }
        }
    }
}

// shared/build.gradle.kts
kotlin {
    sourceSets {
        commonMain.dependencies {
            implementation("dev.brewkits:grant-core:2.0.0")
            implementation("dev.brewkits:grant-compose:2.0.0")         // Optional: Compose dialogs
            implementation("dev.brewkits:grant-core-koin:2.0.0")       // Optional: Koin DI support

            // Optional: add only the permission modules you actually use on iOS.
            // Omitting a module means its iOS framework is never linked — no phantom
            // NSUsageDescription keys, no App Store rejections.
            implementation("dev.brewkits:grant-contacts:2.0.0")        // Optional: Contacts (iOS CNContactStore)
            implementation("dev.brewkits:grant-calendar:2.0.0")        // Optional: Calendar (iOS EventKit)
            implementation("dev.brewkits:grant-motion:2.0.0")          // Optional: Motion (iOS CoreMotion)
        }
    }
}