abstract class LDBooleanValueSource: ValueSource<Boolean, LDBooleanValueSource.Params> {
  interface Params : ValueSourceParameters {
    val flagName: Property<String>
    val sdkKey: Property<String>
    val context: Property<LDContext> // Not serializable!
  }

  companion object {
    private val config: LDConfig = LDConfig.Builder().build()

    @JvmStatic
    fun ProviderFactory.launchDarklyBoolean(flagName: String, context: LDContext): Provider<Boolean> {
      return of(LDBooleanValueSource::class.java) {
        it.parameters.flagName.set(flagName)
        it.parameters.sdkKey.set(gradleProperty("launchdarkly.sdkKey"))
        it.parameters.context.set(context)
      }
    }
  }

  private val client by lazy { LDClient(parameters.sdkKey.get(), config) }

  override fun obtain(): Boolean =
    client.allFlagsState(parameters.context.get())
      .getFlagValue(parameters.flagName.get())
      .booleanValue()
}