%% This file contains the definitions for all metrics used by exometer.
%%
%% First the used entries and probes for exometer will be described and
%% then the actual metrics. These definitions contain the way metrics are
%% exposed, e.g. for requests:
%%
%%   - request handle time (gauge)
%%   - request counter (counter)
%%
%% In a similar way this holds for other metrics.

%% this will be prepended to all eradius metrics
-define(DEFAULT_ENTRIES, [eradius, radius]).

%% contains all metric definitions defined below sorted by service
-define(METRICS, [{server,  ?SERVER_METRICS},       %% metrics from all NAS together for one server socket
                  {nas,     ?NAS_METRICS},          %% metrics from single NAS
                  {client,  ?CLIENT_METRICS}]).     %% metrics from single client


%% exometer basic configuration used for metrics
-define(COUNTER,        {counter,   %% exometer type
                         []}).      %% type options

-define(GAUGE,          {gauge,
                         []}).

-define(HISTOGRAM_60000, {histogram,
                         [{slot_period, 100},
                          {time_span, 60000}]}).

-define(FUNCTION_UPTIME,{{function, eradius_metrics,
                          update_uptime, undefined,
                          proplist, [value]},
                         []}).

-define(FUNCTION_SINCE_LAST_REQUEST,
                        {{function, eradius_metrics,
                          update_since_last_request, undefined,
                          proplist, [value]},
                         []}).

-define(BASIC_TIME_METRICS, [
     {time, last_reset, [
       {ticks, ?GAUGE}]},
     {time, last_config_reset, [
       {ticks, ?GAUGE}]},
     {time, up, [
       {ticks, ?FUNCTION_UPTIME}]}
     ]).

-define(BASIC_REQUEST_METRICS, [
     {request, total, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, access, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, accounting, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, coa, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, disconnect, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},

     %% RESPONSES
     {response, total, [
       {counter, ?COUNTER}]},
     {response, access, [
       {counter, ?COUNTER}]},
     {response, accounting, [
       {counter, ?COUNTER}]},
     {response, access_accept, [
       {counter, ?COUNTER}]},
     {response, access_reject, [
       {counter, ?COUNTER}]},
     {response, access_challenge, [
       {counter, ?COUNTER}]},
     {response, disconnect_ack, [
       {counter, ?COUNTER}]},
     {response, disconnect_nak, [
       {counter, ?COUNTER}]},
     {response, coa_ack, [
       {counter, ?COUNTER}]},
     {response, coa_nak, [
       {counter, ?COUNTER}]},

     {request, pending, [
       {gauge, ?COUNTER}]},

     {time, last_request, [
       {ticks, ?GAUGE}]},
     {time, since_last_request, [
       {ticks, ?FUNCTION_SINCE_LAST_REQUEST}]}
     ]).


-define(SERVER_METRICS, [
     {request, invalid, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, malformed, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]}
     ] ++ ?NAS_METRICS
       ++ ?BASIC_TIME_METRICS).

-define(NAS_METRICS, [
     {request, dropped, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, retransmission, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {response, retransmission, [
       {counter, ?COUNTER}]},
     {request, duplicate, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, bad_authenticator, [     %TODO: this metric is just initialized and not updated within eradius
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, unknown_type, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]}
     ] ++ ?BASIC_REQUEST_METRICS).


-define(CLIENT_METRICS, [
     {request, retransmission, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {request, timeout, [
       {gauge, ?HISTOGRAM_60000},
       {counter, ?COUNTER}]},
     {response, bad_authenticator, [    %TODO: this metric is just initialized and not updated within eradius
       {counter, ?COUNTER}]},
     {response, malformed, [            %TODO: this metric is just initialized and not updated within eradius
       {counter, ?COUNTER}]},
     {response, unknown_type, [         %TODO: this metric is just initialized and not updated within eradius
       {counter, ?COUNTER}]},
     {response, dropped, [
       {counter, ?COUNTER}]}
     ] ++ ?BASIC_REQUEST_METRICS).