% This file is licensed to you 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.
%%% @hidden
-module(wpool_process_sup).
-author('elbrujohalcon@inaka.net').

-behaviour(supervisor).

%% API
-export([start_link/3]).

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

%% @private
-spec start_link(wpool:name(), atom(), [wpool:option()]) -> {ok, pid()}.
start_link(Parent, Name, Options) ->
  supervisor:start_link({local, Name}, ?MODULE, {Parent, Options}).

%% @private
-spec init({wpool:name(), [wpool:option()]}) ->
        {ok, {supervisor:sup_flags(), [supervisor:child_spec()]}}.
init({Name, Options}) ->
  {Worker, InitArgs} =
    proplists:get_value(worker, Options, {wpool_worker, undefined}),
  Workers = proplists:get_value(workers, Options, 100),
  Strategy = proplists:get_value(strategy, Options, {one_for_one, 5, 60}),

  WorkerSpecs =
    [{wpool_pool:worker_name(Name, I),
      {wpool_process, start_link,
       [wpool_pool:worker_name(Name, I), Worker, InitArgs, Options]},
       permanent, 5000, worker, [Worker]}
    || I <- lists:seq(1, Workers)],
  {ok, {Strategy, WorkerSpecs}}.