"""
(IoT / Edge - ) Devices are hosts having a state containing the "output" / the business data which is exposed
besides monitoring information.
"""
interface Device implements Host {
    hostid: ID!
    """
    Per convention a uuid is used as hostname to identify devices if they do not have a unique hostname
    """
    host: String!
    deviceType: String
    hostgroups: [HostGroup!]
    name: String
    tags: DeviceConfig
    state: DeviceState
}

type DeviceConfig {
    deviceWidgetPreview: WidgetPreview
}

type WidgetPreview {
    TOP_LEFT: DisplayFieldSpec
    TOP_RIGHT: DisplayFieldSpec
    BOTTOM_LEFT: DisplayFieldSpec
    BOTTOM_RIGHT: DisplayFieldSpec
}

type DisplayFieldSpec {
    key: String,
    emptyValue: String
    unit: String,
    value_font_size: String
    g_value_transform: String
    unit_font_size: String
    g_unit_transform: String
}

type OperationalDeviceData {
    temperature: Float
    voltage: Float
    signalstrength: Float
    location: Location
    timestamp: DateTime
    error: [ErrorPayload!]
}

type ErrorPayload {
    code: Int!
    message: String
    additionalInfo: JSONObject
}

interface DeviceState {
    operational: OperationalDeviceData
}

# Generic IoT devices with "generic" current state - mapping all "values"
type GenericDeviceState implements DeviceState {
    operational: OperationalDeviceData
    current: JSONObject
}


"""
Device represents generic IoT / Edge - devices providing their state as generic "state.current" - JSON Object
"""
type GenericDevice implements Host & Device  {
    hostid: ID!
    """
    Per convention a uuid is used as hostname to identify devices if they do not have a unique hostname
    """
    host: String!
    deviceType: String
    hostgroups: [HostGroup!]
    name: String
    tags: DeviceConfig
    state: GenericDeviceState
}