%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2010-2013. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
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%% %CopyrightEnd%
%%

-module(redirect_cb).

-include_lib("diameter/include/diameter.hrl").
-include_lib("diameter/include/diameter_gen_base_rfc3588.hrl").

%% diameter callbacks
-export([peer_up/3,
         peer_down/3,
         pick_peer/4,
         prepare_request/3,
         prepare_retransmit/3,
         handle_answer/4,
         handle_error/4,
         handle_request/3]).

-define(UNEXPECTED, erlang:error({unexpected, ?MODULE, ?LINE})).

peer_up(_SvcName, {PeerRef, _}, State) ->
    io:format("up: ~p~n", [PeerRef]),
    State.

peer_down(_SvcName, {PeerRef, _}, State) ->
    io:format("down: ~p~n", [PeerRef]),
    State.

pick_peer(_, _, _SvcName, _State) ->
    ?UNEXPECTED.

prepare_request(_, _SvcName, _Peer) ->
    ?UNEXPECTED.

prepare_retransmit(_Packet, _SvcName, _Peer) ->
    ?UNEXPECTED.

handle_answer(_Packet, _Request, _SvcName, _Peer) ->
    ?UNEXPECTED.

handle_error(_Reason, _Request, _SvcName, _Peer) ->
    ?UNEXPECTED.

handle_request(#diameter_packet{msg = _, errors = []}, _SvcName, {_, Caps}) ->
    #diameter_caps{}
        = Caps,
    discard.   %% TODO
