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interface Mediator {
    fun getFlowIntent(context: Context, flow: Flow): Intent
}

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sealed class Flow {
    object MainFlow : Flow
    class FeatureFlow(data: SomeDataType) : Flow
}

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interface MainFlowIntentProvider : SimpleFlowIntentProvider

interface FeatureFlowIntentProvider : DataFlowIntentProvider<SomeDataType>

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internal class NavigationMediator(
    private val mainFlowIntentProvider: MainFlowIntentProvider,
    private val featureFlowIntentProvider: FeatureFlowIntentProvider
) : Mediator {
    
    override fun getFlowIntent(context: Context, flow: Flow): Intent = when (flow) {
        is MainFlow -> mainFlowIntentProvider.getFlowIntent(context)
        is FeatureFlow -> featureFlowIntentProvider.getFlowIntent(context, flow.data)
    }
}

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interface SimpleFlowIntentProvider {
    fun getFlowIntent(context: Context): Intent
}

interface DataFlowIntentProvider<Data> where Data : Any {
    fun getFlowIntent(context: Context, data: Data): Intent
}

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class StartFlow(val flow: Flow) : Command
class FinishFlow(val transitionData: Any?) : Command

class FlowRouter : Router() {

    fun startFlow(flow: Flow) {
        executeCommands(StartFlow(flow))
    }

    fun finishFlow(data: Any? = null) {

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abstract class BaseActivity : AppCompatActivity() {

    private val navigatorHolder: NavigatorHolder by inject()
    protected val mediator: NavigationMediator by inject()

    protected abstract val navigator: Navigator

    override fun onResumeFragments() {
        super.onResumeFragments()
        navigatorHolder.setNavigator(navigator)

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val coreModule = module(ROOT_SCOPE) {
    val cicerone = Cicerone.create(FlowRouter())
    single<Router> { cicerone.router }
    single<FlowRouter> { cicerone.router }
    single<NavigatorHolder> { cicerone.navigatorHolder }
}

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val mediatorModule = module(ROOT_SCOPE) {
    single<Mediator> { NavigationMediator(get(), get()) }
}

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internal class MainFlowIntentProviderImpl : MainFlowIntentProvider {
    override fun getFlowIntent(context: Context): Intent = context.getFlowIntentFor<MainActivity>()
}