%%
%% %CopyrightBegin%
%%
%% SPDX-License-Identifier: Apache-2.0
%%
%% Copyright Ericsson AB 2007-2026. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%%     http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%

%%
%%----------------------------------------------------------------------
%% Purpose: Supervisor of DTLS connection.
%%----------------------------------------------------------------------
-module(dtls_connection_sup).
-moduledoc false.

-behaviour(supervisor).

%% API
-export([start_link/0, start_link_dist/0]).
-export([start_child/1, start_child_dist/1]).

%% Supervisor callback
-export([init/1]).

%%%=========================================================================
%%%  API
%%%=========================================================================
start_link() ->
    supervisor:start_link({local, ?MODULE}, ?MODULE, []).

start_link_dist() ->
    supervisor:start_link({local, dtls_connection_sup_dist}, ?MODULE, []).

start_child([_Role, _Host, _Port, _Socket, {SslOpts, _, _}, _User, _CbInfo] = Args) ->
    start_child(?MODULE, SslOpts, Args).

start_child_dist([_Role, _Host, _Port, _Socket, {SslOpts, _, _}, _User, _CbInfo] = Args) ->
    start_child(dtls_connection_sup_dist, SslOpts, Args).

start_child(Module, SslOpts, Args) ->
    ReceiverSpawnOpts = maps:get(receiver_spawn_opts, SslOpts, []),
    case supervisor:start_child(Module, [self(), ReceiverSpawnOpts]) of
        {ok, Pid} ->
            Pid ! {self(), options, Args},
            {ok, Pid};
        Error ->
            Error
    end.

%%%=========================================================================
%%%  Supervisor callback
%%%=========================================================================
init(_) ->
    SupFlags = #{strategy  => simple_one_for_one,
                 intensity =>   0,
                 period    => 3600
                },
    ChildSpecs = [#{id       => undefined,
                    start    => {ssl_gen_statem, dtls_start_link, []},
                    restart  => temporary,
                    shutdown => 4000,
                    modules  => [ssl_gen_statem, dtls_connection],
                    type     => worker
                   }
                 ],
    {ok, {SupFlags, ChildSpecs}}.
