-module(eventhub_app).
-behaviour(application).
-export([start/2, stop/1]).

start(_StartType, _StartArgs) ->
  pg:start_link(),
  application:ensure_all_started(mnesia),
  application:ensure_all_started(cowboy),
  case infra_sup:start_link() of
    {ok, Pid} ->
      ok = infra_mnesia:init_tables(),
      ok = infra_mnesia:wait_for_tables(),
      connect_nodes(),
      init_default_superadmin(),
      start_http(),          % Пользовательский API (8080)
      start_admin_http(),    % Административный API (8445)
      application:ensure_all_started(prometheus),
      application:ensure_all_started(prometheus_cowboy),
      {ok, Pid};
    Error ->
      Error
  end.

stop(_State) -> ok.

%% ===================================================================
%% Пользовательский HTTP (порт 8080) — только публичные эндпоинты
%% ===================================================================
start_http() ->
  Port = application:get_env(eventhub, http_port, 8080),
  Dispatch = cowboy_router:compile([
    {'_', [
      {"/metrics/[:registry]", prometheus_cowboy2_handler, []},
      {"/health", handler_health, []},
      {"/v1/register", handler_register, []},
      {"/v1/login", handler_login, []},
      {"/v1/refresh", handler_refresh, []},
      {"/v1/user/me", handler_user_me, []},
      {"/v1/user/bookings", handler_user_bookings, []},
      {"/v1/user/reviews", handler_user_reviews, []},
      {"/v1/search", handler_search, []},
      {"/v1/calendars", handler_calendars, []},
      {"/v1/calendars/:id", handler_calendar_by_id, []},
      {"/v1/calendars/:calendar_id/events", handler_events, []},
      {"/v1/events/:id", handler_event_by_id, []},
      {"/v1/events/:id/occurrences", handler_event_occurrences, []},
      {"/v1/events/:id/occurrences/:start_time", handler_event_occurrences, []},
      {"/v1/events/:id/bookings", handler_bookings, []},
      {"/v1/bookings/:id", handler_booking_by_id, []},
      {"/v1/reviews", handler_reviews, []},
      {"/v1/reviews/:id", handler_review_by_id, []},
      {"/v1/reports", handler_reports, []},
      {"/v1/tickets", handler_tickets, []},
      {"/v1/tickets/:id", handler_ticket_by_id, []},
      {"/v1/subscription", handler_subscription, []}
    ]}
  ]),
  Middlewares = [cowboy_router, cowboy_handler],
  Env = #{dispatch => Dispatch},
  cowboy:start_clear(http, [{port, Port}], #{env => Env, middlewares => Middlewares}),
  io:format("HTTP server started on port ~p~n", [Port]).

%% ===================================================================
%% Административный HTTP (порт 8445) — все админские эндпоинты
%% ===================================================================
start_admin_http() ->
  Port = application:get_env(eventhub, admin_http_port, 8445),
  Dispatch = cowboy_router:compile([
    {'_', [
      % ================== БАЗОВЫЕ ==================
      {"/v1/admin/health", admin_handler_health, []},
      {"/v1/admin/stats", admin_handler_stats, []},
      {"/v1/admin/login", admin_handler_login, []},
      % ================== ПОЛЬЗОВАТЕЛИ ==================
      {"/v1/admin/users", admin_handler_users, []},
      {"/v1/admin/users/:id", admin_handler_user_by_id, []},
      % ================== ОТЧЁТЫ ==================
      {"/v1/admin/reports", admin_handler_reports, []},
      {"/v1/admin/reports/:id", admin_handler_report_by_id, []},
      % ================== ОТЗЫВЫ ==================
      {"/v1/admin/reviews/:id", admin_handler_reviews, []},
      % ================== БАН-СЛОВА ==================
      {"/v1/admin/banned-words", admin_handler_banned_words, []},
      {"/v1/admin/banned-words/:word", admin_handler_banned_words, []},
      % ================== ТИКЕТЫ ==================
      {"/v1/admin/tickets/stats", admin_handler_ticket_stats, []},
      {"/v1/admin/tickets/:id", admin_handler_ticket_by_id, []},
      {"/v1/admin/tickets", admin_handler_tickets, []},
      % ================== ПОДПИСКИ ==================
      {"/v1/admin/subscriptions", admin_handler_subscriptions, []},
      {"/v1/admin/subscriptions/:id", admin_handler_subscriptions, []},
      % ================== МОДЕРАЦИЯ (общий маршрут) ==================
      {"/v1/admin/:target_type/:id", admin_handler_moderation, []},
      % ================== Управление ролями (только для superadmin) ==================
      {"/v1/admin/me", admin_handler_me, []},
      {"/v1/admin/admins", admin_handler_admins, []},
      {"/v1/admin/admins/:id", admin_handler_admins, []},
      {"/v1/admin/audit", admin_handler_audit, []}
    ]}
  ]),

  Middlewares = [cowboy_router, cowboy_handler],
  Env = #{dispatch => Dispatch},
  cowboy:start_clear(admin_http, [{port, Port}], #{env => Env, middlewares => Middlewares}),
  io:format("Admin HTTP server started on port ~p~n", [Port]),

  % WebSocket для пользователей
  WsDispatch = cowboy_router:compile([{'_', [{"/ws", ws_handler, []}]}]),
  cowboy:start_clear(ws, [{port, 8081}], #{env => #{dispatch => WsDispatch}}),

  % WebSocket для админов
  AdminWsDispatch = cowboy_router:compile([{'_', [{"/admin/ws", admin_ws_handler, []}]}]),
  cowboy:start_clear(admin_ws, [{port, 8446}], #{env => #{dispatch => AdminWsDispatch}}),

  io:format("WebSocket started on ports 8081 (user) and 8446 (admin)~n").

%% ===================================================================
%% Ручное подключение к нодам кластера (запасной вариант)
%% ===================================================================
connect_nodes() ->
  case os:getenv("JOIN_NODES") of
    false -> ok;
    NodesStr ->
      Nodes = [list_to_atom(string:trim(N)) || N <- string:tokens(NodesStr, ",")],
      lists:foreach(fun(Node) ->
        case net_kernel:connect_node(Node) of
          true  -> io:format("Connected to ~s~n", [Node]);
          false -> io:format("ERROR: Failed to connect to ~s~n", [Node]);
          ignored -> ok
        end
                    end, Nodes)
  end.

init_default_superadmin() ->
  case core_admin:list_all() of
    [] ->
      AdminEmail = os:getenv("ADMIN_EMAIL", "admin@eventhub.local"),
      AdminPassword = os:getenv("ADMIN_PASSWORD", "123456"),
      {ok, _Admin} = core_admin:create(
        list_to_binary(AdminEmail),
        list_to_binary(AdminPassword),
        superadmin
      ),
      io:format("Default superadmin created: ~s~n", [AdminEmail]);
    _ ->
      io:format("Superadmin already exists. Skipping creation.~n")
  end.