-module(rebar3_proto_plugin_prv).

-export([init/1, do/1, format_error/1]).

-define(PROVIDER, generate).
-define(DEPS, [app_discovery]).

%% ===================================================================
%% Public API
%% ===================================================================
-spec init(rebar_state:t()) -> {ok, rebar_state:t()}.
init(State) ->
    Provider = providers:create([
            {name, ?PROVIDER},
            {namespace, proto},
            {module, ?MODULE},
            {bare, true},
            {deps, ?DEPS},
            {example, "rebar3 proto"},
            {opts, []},
            {short_desc, "A rebar plugin"},
            {desc, "A rebar plugin"}
    ]),
    {ok, rebar_state:add_provider(State, Provider)}.


-spec do(rebar_state:t()) -> {ok, rebar_state:t()}.
do(State) ->
    Apps = case rebar_state:current_app(State) of
            undefined ->
                rebar_state:project_apps(State);
            AppInfo ->
                [AppInfo]
           end,
    lists:foreach(fun(App) ->
                    rebar3_proto_plugin_prv_generate:generate(App, State)
                  end, Apps),
    {ok, State}.

-spec format_error(any()) ->  iolist().
format_error(Reason) ->
    io_lib:format("~p", [Reason]).