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

-define(TABLES, [admin, admin_audit, calendar, review, ticket]).
-define(ADMIN_ID, <<"adm_test_1">>).
-define(OWNER_ID, <<"owner_cal_stats">>).

setup() ->
  eh_test_support:start_mnesia(),
  eh_test_support:ensure_tables(?TABLES),
  eh_test_support:ensure_jwt(),
  eh_test_support:seed_admin(#{id => ?ADMIN_ID}),
  ok.

cleanup(_) ->
  eh_test_support:unload_cowboy(),
  eh_test_support:delete_tables(?TABLES),
  eh_test_support:stop_mnesia(),
  ok.

admin_calendar_stats_test_() ->
  {foreach, fun setup/0, fun cleanup/1, [
    {"GET stats – empty", {timeout, 60, fun test_stats_empty/0}},
    {"GET stats – with calendars", {timeout, 60, fun test_stats_with_data/0}},
    {"GET – unauthorized", {timeout, 60, fun test_unauthorized/0}},
    {"POST – method not allowed", {timeout, 60, fun test_wrong_method/0}}
  ]}.

test_stats_empty() ->
  {Status, _, Body} = eh_test_support:call(admin_handler_calendar_stats, #{
    method => <<"GET">>,
    path => <<"/v1/admin/calendars/stats">>,
    auth => ?ADMIN_ID
  }),
  ?assertEqual(200, Status),
  Result = jsx:decode(Body, [return_maps]),
  ?assertEqual(0, maps:get(<<"total_calendars">>, Result)),
  ?assertEqual(#{}, maps:get(<<"calendars_by_type">>, Result)),
  ?assertEqual(#{}, maps:get(<<"calendars_by_status">>, Result)),
  ?assertEqual([], maps:get(<<"top_calendars_by_reviews">>, Result)),
  ?assertEqual([], maps:get(<<"top_calendars_by_rating">>, Result)).

test_stats_with_data() ->
  {ok, C1} = core_calendar:create(?OWNER_ID, <<"Personal">>, <<"d">>, auto, personal),
  {ok, _} = core_calendar:create(?OWNER_ID, <<"Shop">>, <<"d">>, manual, commercial),
  {ok, _} = core_calendar:update(C1#calendar.id, [
    {rating_avg, 4.5},
    {rating_count, 3}
  ]),
  {Status, _, Body} = eh_test_support:call(admin_handler_calendar_stats, #{
    method => <<"GET">>,
    path => <<"/v1/admin/calendars/stats">>,
    auth => ?ADMIN_ID
  }),
  ?assertEqual(200, Status),
  Result = jsx:decode(Body, [return_maps]),
  ?assertEqual(2, maps:get(<<"total_calendars">>, Result)),
  ByType = maps:get(<<"calendars_by_type">>, Result),
  ?assertEqual(1, maps:get(<<"personal">>, ByType)),
  ?assertEqual(1, maps:get(<<"commercial">>, ByType)),
  ByStatus = maps:get(<<"calendars_by_status">>, Result),
  ?assertEqual(2, maps:get(<<"active">>, ByStatus)),
  TopRating = maps:get(<<"top_calendars_by_rating">>, Result),
  ?assert(length(TopRating) >= 1),
  [First | _] = TopRating,
  ?assertEqual(C1#calendar.id, maps:get(<<"id">>, First)).

test_unauthorized() ->
  {Status, _, _} = eh_test_support:call(admin_handler_calendar_stats, #{
    method => <<"GET">>,
    path => <<"/v1/admin/calendars/stats">>,
    auth => none
  }),
  ?assertEqual(401, Status).

test_wrong_method() ->
  {Status, _, _} = eh_test_support:call(admin_handler_calendar_stats, #{
    method => <<"POST">>,
    path => <<"/v1/admin/calendars/stats">>,
    auth => ?ADMIN_ID
  }),
  ?assertEqual(405, Status).