class App : Application() {
    override fun onCreate() {
        super.onCreate()
        // Init Philology with our PhilologyRepositoryFactory
        Philology.init(MyPhilologyRepositoryFactory)
        // Add PhilologyInterceptor to ViewPump
        // If you are already using Calligraphy you can add both interceptors, there is no problem
        ViewPump.init(ViewPump.builder().addInterceptor(PhilologyInterceptor).build())
    }
}

object MyPhilologyRepositoryFactory : PhilologyRepositoryFactory {
    override fun getPhilologyRepository(locale: Locale): PhilologyRepository? = when (locale.language) {
        Locale.ENGLISH.language -> EnglishPhilologyRepository
        Locale("es", "ES").language -> SpanishPhilologyRepository
        // If we don't support a language we could return null as PhilologyRepository and
        // values from the strings resources file will be used
        else -> null
    }
}

object EnglishPhilologyRepository : PhilologyRepository {
    override fun getText(key: String): CharSequence? = when (key) {
        "label" -> "New value for the `label` key, it could be fetched from a database or an external API server"
        // If we don't want reword a strings we could return null and the value from the string resources file will be used
        else -> null
    }

    override fun getPlural(key: String, quantityString: String): CharSequence?  = when ("${key}_$quantityString") {
        "plurals_label_one" -> "New value for the `plurals_label` key and `one` quantity keyword"
        "plurals_label_other" -> "New value for the `plurals_label` key and `other` quantity keyword"
        // If we don't want reword a plural we could return null and the value from the string resources file will be used
        else -> null
    }

   override fun getTextArray(key: String): Array<CharSequence>? = when (key) {
        "days" -> arrayOf(
            "Monday",
            "Tuesday",
            "Wednesday",
            "Thursday",
            "Friday",
            "Saturday",
            "Saturday"
        )
        // If we don't want reword a string array we could return null and the value from the string resources file will be used
        else -> null
    }
}

object SpanishPhilologyRepository : PhilologyRepository { /* Implementation */ }

class BaseActivity : AppCompatActivity() {
    override fun attachBaseContext(newBase: Context) {
        super.attachBaseContext(ViewPumpContextWrapper.wrap(Philology.wrap(newBase)))
    }
}

object MyCustomViewTransformer : ViewTransformer {
    override fun reword(view: View, attributeSet: AttributeSet): View = view.apply {
        when (this) {
            is MyCustomView -> reword(attributeSet)
        }
    }

    private fun MyCustomView.reword(attributeSet: AttributeSet) {
        @StringRes val textResId = context.getStringResourceId(attributeSet, R.styleable.MyCustomView_text)
        if (textResId > 0) setTextToMyCustomView(textResId)
    }
}

class App : Application() {
    override fun onCreate() {
        super.onCreate()
        Philology.init(MyPhilologyRepositoryFactory, MyViewTransformerFactory)
        ViewPump.init(ViewPump.builder().addInterceptor(PhilologyInterceptor.INSTANCE).build());
    }
}

object MyViewTransformerFactory : ViewTransformerFactory{
    override fun getViewTransformer(view: View): ViewTransformer = when (view) {
        is MyCustomView -> MyCustomViewTransformer
        else -> null
    }
}