%%% @doc
%%% GajuDesk
%%% @end

-module(gajudesk).
-vsn("0.6.6").
-behavior(application).
-author("Craig Everett <craigeverett@qpq.swiss>").
-copyright("QPQ AG <info@qpq.swiss>").
-license("GPL-3.0-or-later").

-export([ts/0]).
-export([start/2, stop/1]).

-export_type([id/0, key/0, poa/0, tx/0, ts/0, key_txs/0]).

-include("$zx_include/zx_logger.hrl").
-include("gd.hrl").


-type id()        :: binary().
-type key()       :: #key{}.
-type poa()       :: #poa{}.
-type tx()        :: #tx{}.
-type ts()        :: integer().
-type chain_txs() :: #{ChainID :: binary() := [tx()]}.
-type key_txs()   :: #{id() := {{LastCheck :: ts(), mdw | node}, chain_txs()}}.


ts() ->
    erlang:system_time(nanosecond).


-spec start(normal, Args :: term()) -> {ok, pid()}.
%% @private
%% Called by OTP to kick things off. This is for the use of the "application" part of
%% OTP, not to be called by user code.
%%
%% NOTE:
%%   The commented out second argument would come from ebin/gajudesk.app's 'mod'
%%   section, which is difficult to define dynamically so is not used by default
%%   here (if you need this, you already know how to change it).
%%
%%   Optional runtime arguments passed in at start time can be obtained by calling
%%   zx_daemon:argv/0 anywhere in the body of the program.
%%
%% See: http://erlang.org/doc/apps/kernel/application.html

start(normal, _Args) ->
    ok =
        case net_kernel:stop() of
            ok ->
                log(info, "SAFE: This node is running standalone.");
            {error, not_found} ->
                log(warning, "SAFETY: Distribution has been disabled on this node.");
            {error, not_allowed} ->
                ok = tell(error, "DANGER! This node is in distributed mode!"),
                init:stop(1)
        end,
    ok = application:ensure_started(hakuzaru),
    ok = application:ensure_started(zxwidgets),
    ok = application:ensure_started(sophia),
    gd_sup:start_link().


-spec stop(term()) -> ok.
%% @private
%% Similar to start/2 above, this is to be called by the "application" part of OTP,
%% not client code. Causes a (hopefully graceful) shutdown of the application.

stop(_State) ->
    ok.