%%%-------------------------------------------------------------------
%%% @author anlicheng
%%% @copyright (C) 2025, <COMPANY>
%%% @doc
%%%
%%% @end
%%% Created : 18. 4月 2025 16:42
%%%-------------------------------------------------------------------
-module(efka_service_sup).
-author("anlicheng").
-include("efka_tables.hrl").

-behaviour(supervisor).

%% API
-export([start_link/0]).
-export([start_service/1, stop_service/1]).

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

-define(SERVER, ?MODULE).

%%%===================================================================
%%% API functions
%%%===================================================================

%% @doc Starts the supervisor
-spec(start_link() -> {ok, Pid :: pid()} | ignore | {error, Reason :: term()}).
start_link() ->
    supervisor:start_link({local, ?SERVER}, ?MODULE, []).

%%%===================================================================
%%% Supervisor callbacks
%%%===================================================================

%% @private
%% @doc Whenever a supervisor is started using supervisor:start_link/[2,3],
%% this function is called by the new process to find out about
%% restart strategy, maximum restart frequency and child
%% specifications.
init([]) ->
    SupFlags = #{strategy => one_for_one, intensity => 1000, period => 3600},
    %% 简化逻辑，只启动需要运行的微服务
    {ok, Services} = service_model:get_running_services(),
    ServiceIds = lists:map(fun(#service{service_id = ServiceId}) -> ServiceId end, Services),
    lager:debug("[efka_service_sup] will start services: ~p", [ServiceIds]),

    Specs = lists:map(fun(ServiceId) -> child_spec(ServiceId) end, Services),

    {ok, {SupFlags, Specs}}.

%%%===================================================================
%%% Internal functions
%%%===================================================================

-spec start_service(ServiceId :: binary()) -> {ok, Pid :: pid()} | {error, Reason :: any()}.
start_service(ServiceId) when is_binary(ServiceId) ->
    case supervisor:start_child(?MODULE, child_spec(ServiceId)) of
        {ok, Pid} when is_pid(Pid) ->
            {ok, Pid};
        {error, {'already_started', Pid}} when is_pid(Pid) ->
            {ok, Pid};
        {error, Error} ->
            {error, Error}
    end.

-spec stop_service(ServiceId :: binary()) -> ok.
stop_service(ServiceId) when is_binary(ServiceId) ->
    ChildId = efka_service:get_name(ServiceId),
    supervisor:terminate_child(?MODULE, ChildId),
    supervisor:delete_child(?MODULE, ChildId).

child_spec(ServiceId) when is_binary(ServiceId) ->
    Name = efka_service:get_name(ServiceId),
    #{
        id => Name,
        start => {efka_service, start_link, [Name, ServiceId]},
        restart => permanent,
        shutdown => 5000,
        type => worker,
        modules => ['efka_service']
    }.