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

-define(TABLES, [admin, admin_audit, user, ticket]).
-define(ADMIN_ID, <<"adm_test_1">>).

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_user_stats_test_() ->
  {foreach, fun setup/0, fun cleanup/1, [
    {"GET stats – empty", {timeout, 60, fun test_stats_empty/0}},
    {"GET stats – with users", {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_user_stats, #{
    method => <<"GET">>,
    path => <<"/v1/admin/users/stats">>,
    auth => ?ADMIN_ID
  }),
  ?assertEqual(200, Status),
  Result = jsx:decode(Body, [return_maps]),
  ?assertEqual(0, maps:get(<<"total_users">>, Result)),
  ?assertEqual(0, maps:get(<<"pending_users">>, Result)).

test_stats_with_data() ->
  ok = mnesia:dirty_write(eh_test_support:make_user(#{
    id => <<"u1">>,
    email => <<"alice@test.local">>,
    nickname => <<"alice">>,
    status => active,
    role => user
  })),
  ok = mnesia:dirty_write(eh_test_support:make_user(#{
    id => <<"u2">>,
    email => <<"bob@test.local">>,
    nickname => <<"bob">>,
    status => pending,
    role => user
  })),
  {Status, _, Body} = eh_test_support:call(admin_handler_user_stats, #{
    method => <<"GET">>,
    path => <<"/v1/admin/users/stats">>,
    auth => ?ADMIN_ID
  }),
  ?assertEqual(200, Status),
  Result = jsx:decode(Body, [return_maps]),
  ?assertEqual(2, maps:get(<<"total_users">>, Result)),
  ?assertEqual(1, maps:get(<<"pending_users">>, Result)),
  ByRole = maps:get(<<"users_by_role">>, Result),
  ?assertEqual(2, maps:get(<<"user">>, ByRole)),
  ByStatus = maps:get(<<"users_by_status">>, Result),
  ?assertEqual(1, maps:get(<<"active">>, ByStatus)),
  ?assertEqual(1, maps:get(<<"pending">>, ByStatus)).

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

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