SimpleDiStorage

@PublishedApi
internal object SimpleDiStorage {
    val instances = mutableMapOf<KClass<*>, InstanceType<*>>()

    inline fun <reified T : Any> addFactory(factory: InstanceType<T>) {
        check(instances[T::class] == null) {
            "Definition for ${T::class} already added."
        }
        instances[T::class] = factory
    }

    inline fun <reified T : Any> getInstance(noinline parameters: (Params.() -> Unit)? = null): T {
        return when (val factory = instances[T::class]) {
            is InstanceType.Singleton -> factory.instance as T
            is InstanceType.Factory -> factory.build() as T
            is InstanceType.ParamFactory -> {
                val factoryParams = Params().apply(requireNotNull(parameters)).parameters
                factory.build(*factoryParams) as T
            }
            null -> error("No factory provided for class: ${T::class.java}")
        }
    }
}