syntax = "proto3";

option go_package = "github.com/opencord/voltha-protos/v4/go/voltha";
option java_package = "org.opencord.voltha";

package voltha;

import "voltha_protos/meta.proto";
import "google/api/annotations.proto";
import "google/protobuf/timestamp.proto";
import "voltha_protos/common.proto";

message ConfigEventType {
    enum Types {
        add = 0; // A new config has been added
        remove = 1; // A config has been removed
        update = 2; // A config has been updated
    }
}

message ConfigEvent {
    ConfigEventType.Types type = 1;

    string hash = 2; // hash for this change, can be used for quick lookup
    string data = 3; // the actual new data, in json format
}

message KpiEventType {
    enum Types {
        slice = 0; // slice: a set of path/metric data for same time-stamp
        ts = 1; // time-series: array of data for same metric
    }
}

/*
 * Struct to convey a dictionary of metric metadata.
 */
message MetricMetaData {
    string title = 1; // Metric group or individual metric name
    double ts = 2; // UTC time-stamp of data (seconds since epoch) of
    // when the metric or metric group was collected.
    // If this is a 15-min historical group, it is the
    // time of the collection and reporting, not the
    // start or end of the 15-min group interval.

    string logical_device_id = 3; // The logical device ID of the VOLTHA
    // (equivalent to the DPID that ONOS has
    // for the VOLTHA device without the
    //  'of:' prefix
    string serial_no = 4; // The OLT, ONU, ... device serial number
    string device_id = 5; // The OLT, ONU, ... physical device ID

    map<string, string> context = 6; // Name value pairs that provide additional
    // context information on the metrics being
    // reported.

    string uuid = 7; // Transaction identifier used to match On
    // Demand gRPC requests with kafka responses
}

/*
 * Struct to convey a dictionary of metric->value pairs. Typically used in
 * pure shared-timestamp or shared-timestamp + shared object prefix situations.
 */
message MetricValuePairs {

    // Metric / value pairs.
    map<string, float> metrics = 1;

}

/*
 * Struct to group metadata for a metric (or group of metrics) with the key-value
 * pairs of collected metrics
 */
message MetricInformation {
    MetricMetaData metadata = 1;
    map<string, float> metrics = 2;
}

/*
 * Legacy KPI Event structured.  In mid-August, the KPI event format was updated
 *                               to a more easily parsable format. See VOL-1140
 *                               for more information.
 */
message KpiEvent {

    KpiEventType.Types type = 1;

    // Fields used when for slice:

    float ts = 2; // UTC time-stamp of data in slice mode (seconds since epoc)

    map<string, MetricValuePairs> prefixes = 3;

}

message KpiEvent2 {
    // Type of KPI Event
    KpiEventType.Types type = 1;

    // Fields used when for slice:
    double ts = 2; // UTC time-stamp of data in slice mode (seconds since epoch)
    // of the time this entire KpiEvent was published to the kafka bus

    repeated MetricInformation slice_data = 3;
}

/*
 * Describes the events specific to device
 */
message DeviceEvent {
    // Identifier of the originating resource of the event, for ex: device_id
    string resource_id = 1;

    // device_event_name indicates clearly the name of the device event
    string device_event_name = 2;

    // Textual explanation of the device event
    string description = 3;

    // Key/Value storage for extra information that may give context to the event
    map<string, string> context = 4;

}
/*
 * Describes the events specific to an RPC request
 */
message RPCEvent {
    // RPC name
    string rpc = 1;

    // The operation id of that request.  Can be a log correlation ID
    string operation_id = 2;

    // Identifies the service name originating the event
    string service = 3;

    // Identifies the stack originating the event
    string stack_id = 4;

    // Identifies the resource upon which the action is taken, e.g. device_id
    string resource_id = 5;

    // Textual explanation of the event
    string description = 6;

    // Key/Value storage for extra information that may give context to the event
    map<string, string> context = 7;

    // Status of the RPC Event
    common.OperationResp status = 8;
}

/*
 * Identify the area of the system impacted by the event.
 */
message EventCategory {
    enum Types {
        COMMUNICATION = 0;
        ENVIRONMENT = 1;
        EQUIPMENT = 2;
        SERVICE = 3;
        PROCESSING = 4;
        SECURITY = 5;
        // Add new event areas here
    }
}

/*
 * Identify the functional category originating the event
 */
message EventSubCategory {
    enum Types {
        PON = 0;
        OLT = 1;
        ONT = 2;
        ONU = 3;
        NNI = 4;
        // Add new event categories here.
    }
}

/*
 * Identify the type of event
*/
message EventType {
    enum Types {
        CONFIG_EVENT = 0;
        KPI_EVENT = 1;
        KPI_EVENT2 = 2;
        DEVICE_EVENT = 3;
        RPC_EVENT = 4;
    }
}

/*
 * Identify the functional category originating the event
 */
message EventHeader {
    // Unique ID for this event.  e.g. voltha.some_olt.1234
    string id = 1;

    // Refers to the functional area affect by the event
    EventCategory.Types category = 2;

    // Refers to functional category of the event
    EventSubCategory.Types sub_category = 3;

    // Refers to the type of the event
    EventType.Types type = 4;

    // The version identifier for this event type, thus allowing each
    // event type to evolve independently. The version should be in the
    // format “MAJOR.MINOR” format and minor changes must only be additive
    // and non-breaking.
    string type_version = 5;

    // Timestamp at which the event was first raised.
    // This represents the UTC time stamp since epoch (in seconds) when the
    // the event was first raised from the source entity.
    // If the source entity doesn't send the raised_ts, this shall be set
    // to timestamp when the event was received.
    google.protobuf.Timestamp raised_ts = 6;

    // Timestamp at which the event was reported.
    // This represents the UTC time stamp since epoch (in seconds) when the
    // the event was reported (this time stamp is >= raised_ts).
    // If the source entity that reported this event doesn't send the 
    // reported_ts, this shall be set to the same value as raised_ts.
    google.protobuf.Timestamp reported_ts = 7;
}

/*
 * Event Structure
 */
message Event {
    // event header
    EventHeader header = 1;

    // oneof event types referred by EventType.
    oneof event_type {
        // Refers to ConfigEvent
        ConfigEvent config_event = 2;

        // Refers to KpiEvent
        KpiEvent kpi_event = 3;

        // Refers to KpiEvent2
        KpiEvent2 kpi_event2 = 4;

        // Refers to DeviceEvent
        DeviceEvent device_event = 5;

        // Refers to an RPC Event
        RPCEvent rpc_event = 6;

        // Add other event types here.

    }
}