import HomeKit

extension HMService {
    class var serviceTypes: [String] {
        let services_10 = [
            HMServiceTypeLightbulb,
            HMServiceTypeSwitch,
            HMServiceTypeThermostat,
            HMServiceTypeGarageDoorOpener,
            HMServiceTypeAccessoryInformation,
            HMServiceTypeFan,
            HMServiceTypeOutlet,
            HMServiceTypeLockMechanism,
            HMServiceTypeLockManagement,
            HMServiceTypeAirQualitySensor,
            HMServiceTypeBattery,
            HMServiceTypeCarbonDioxideSensor,
            HMServiceTypeCarbonMonoxideSensor,
            HMServiceTypeContactSensor,
            HMServiceTypeDoor,
            HMServiceTypeDoorbell,
            HMServiceTypeHumiditySensor,
            HMServiceTypeLeakSensor,
            HMServiceTypeLightSensor,
            HMServiceTypeMotionSensor,
            HMServiceTypeOccupancySensor,
            HMServiceTypeSecuritySystem,
            HMServiceTypeStatefulProgrammableSwitch,
            HMServiceTypeStatelessProgrammableSwitch,
            HMServiceTypeSmokeSensor,
            HMServiceTypeTemperatureSensor,
            HMServiceTypeWindow,
            HMServiceTypeWindowCovering,
            HMServiceTypeCameraRTPStreamManagement,
            HMServiceTypeCameraControl,
            HMServiceTypeMicrophone,
            HMServiceTypeSpeaker]

        if #available(iOS 10.2, *) {
            let services_10_2 = [
                HMServiceTypeAirPurifier,
                HMServiceTypeVentilationFan,
                HMServiceTypeFilterMaintenance,
                HMServiceTypeHeaterCooler,
                HMServiceTypeHumidifierDehumidifier,
                HMServiceTypeSlats
            ]

            return services_10 + services_10_2
        } else {
            return services_10
        }
    }


    func validAssociatedServiceTypes(callback: @escaping (([String?]) -> Void)) {
        let initialAssociatedServiceType = self.associatedServiceType

        var allTypes = HMService.serviceTypes
        var validTypes: [String?] = []

        func checkValidType() {
            guard allTypes.isEmpty == false else {
                // restore initial type after all valid types were found
                self.updateAssociatedServiceType(initialAssociatedServiceType, completionHandler: { error in
                    DispatchQueue.main.async {
                        callback(validTypes)
                    }
                })

                return
            }

            let type = allTypes.popLast()

            // test if assigning the type results in an error
            self.updateAssociatedServiceType(type) { error in
                // append to valid types if no error was raised
                if error == nil {
                    validTypes.append(type)
                }

                checkValidType()
            }
        }

        checkValidType()
    }
}