-module(rebar3_lfe_prv_versions).

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

-include("rebar3_lfe.hrl").

-define(PROVIDER, versions).
-define(DEPS, [compile]).

%% =============================================================================
%% Plugin API
%% =============================================================================

init(State) ->
    Description = "Get various versions",
    Provider = providers:create([
        {namespace,  ?NAMESPACE},
        {name,       ?PROVIDER},
        {module,     ?MODULE},
        {bare,       true},
        {deps,       ?DEPS},
        {example,    "rebar3 lfe version"},
        {opts,       []},
        {short_desc, Description},
        {desc,       info(Description)}
    ]),
    {ok, rebar_state:add_provider(State, Provider)}.

do(State) ->
    rebar_paths:set_paths([deps, plugins], State),
    Apps = rebar_state:project_apps(State),
    lfe_io:format("~p~n", [versions(Apps)]),
    {ok, State}.

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

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

info(Description) ->
    io_lib:format(
        "~n~s~n"
        "~n"
        "Get comprehensive versions of the project, LFE, Erlang, and others.~n",
        [Description]).

versions(Apps) ->
    rebar_api:debug("Getting versions ...", []),
    [{apps, [app_version_data(AppInfo) || AppInfo <- Apps]},
     {languages, rebar3_lfe_version:language_versions()},
     {tooling, rebar3_lfe_version:rebar_versions()}].

app_version_data(AppInfo) ->
  rebar_api:debug("AppInfo: ~p", [AppInfo]),
  AppFile = rebar_app_info:app_file(AppInfo),
  rebar_api:debug("AppFile: ~p", [AppFile]),
  AppDetails = rebar_app_info:app_details(AppInfo),
  rebar_api:debug("AppDetails: ~p", [AppDetails]),
  AppVersOrig = rebar_app_info:original_vsn(AppInfo),
  rebar_api:debug("AppVersOrig: ~p", [AppVersOrig]),
  % AppVers = rebar_app_info:vsn(AppInfo),
  % rebar_api:debug("AppVers: ~p", [AppVers]),
  {rebar3_lfe_utils:app_name(AppInfo), AppVersOrig}.