-module(core_calendar_tests).
-include_lib("eunit/include/eunit.hrl").
-include("records.hrl").

%% Setup и cleanup
setup() ->
  mnesia:start(),
  mnesia:create_table(calendar, [
    {attributes, record_info(fields, calendar)},
    {ram_copies, [node()]}
  ]),
  ok.

cleanup(_) ->
  mnesia:delete_table(calendar),
  mnesia:stop(),
  ok.

%% Группа тестов
core_calendar_test_() ->
  {foreach,
    fun setup/0,
    fun cleanup/1,
    [
      {"Create calendar test", fun test_create_calendar/0},
      {"Get calendar by id test", fun test_get_by_id/0},
      {"List calendars by owner test", fun test_list_by_owner/0},
      {"Update calendar test", fun test_update_calendar/0},
      {"Delete calendar test", fun test_delete_calendar/0}
    ]}.

%% Тесты
test_create_calendar() ->
  OwnerId = <<"owner123">>,
  Title = <<"Test Calendar">>,
  Description = <<"Test Description">>,

  {ok, Calendar} = core_calendar:create(OwnerId, Title, Description),

  ?assertEqual(OwnerId, Calendar#calendar.owner_id),
  ?assertEqual(Title, Calendar#calendar.title),
  ?assertEqual(Description, Calendar#calendar.description),
  ?assertEqual(personal, Calendar#calendar.type),
  ?assertEqual(active, Calendar#calendar.status),
  ?assert(is_binary(Calendar#calendar.id)),
  ?assert(Calendar#calendar.created_at =/= undefined),
  ?assert(Calendar#calendar.updated_at =/= undefined).

test_get_by_id() ->
  OwnerId = <<"owner123">>,
  {ok, Calendar} = core_calendar:create(OwnerId, <<"Test">>, <<"Desc">>),

  {ok, Found} = core_calendar:get_by_id(Calendar#calendar.id),
  ?assertEqual(Calendar#calendar.id, Found#calendar.id),

  {error, not_found} = core_calendar:get_by_id(<<"nonexistent">>).

test_list_by_owner() ->
  OwnerId = <<"owner123">>,
  OtherOwner = <<"other456">>,

  {ok, _} = core_calendar:create(OwnerId, <<"Calendar 1">>, <<"">>),
  {ok, _} = core_calendar:create(OwnerId, <<"Calendar 2">>, <<"">>),
  {ok, _} = core_calendar:create(OtherOwner, <<"Other Calendar">>, <<"">>),

  {ok, Calendars} = core_calendar:list_by_owner(OwnerId),
  ?assertEqual(2, length(Calendars)).

test_update_calendar() ->
  OwnerId = <<"owner123">>,
  {ok, Calendar} = core_calendar:create(OwnerId, <<"Original">>, <<"">>),
  timer:sleep(2000),
  Updates = [{title, <<"Updated">>}, {description, <<"New Desc">>}],
  {ok, Updated} = core_calendar:update(Calendar#calendar.id, Updates),

  ?assertEqual(<<"Updated">>, Updated#calendar.title),
  ?assertEqual(<<"New Desc">>, Updated#calendar.description),
  ?assert(Updated#calendar.updated_at > Calendar#calendar.updated_at),

  {error, not_found} = core_calendar:update(<<"nonexistent">>, Updates).

test_delete_calendar() ->
  OwnerId = <<"owner123">>,
  {ok, Calendar} = core_calendar:create(OwnerId, <<"Test">>, <<"">>),

  {ok, Deleted} = core_calendar:delete(Calendar#calendar.id),
  ?assertEqual(deleted, Deleted#calendar.status),

  % Удалённый календарь не возвращается в списке активных
  {ok, ActiveCalendars} = core_calendar:list_by_owner(OwnerId),
  ?assertEqual(0, length(ActiveCalendars)).