-module(chip).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([new/1, tag/2, group/2, register/2, find/2, dispatch/2, dispatch_group/3, start/0]).
-export_type([message/3, chip/3, state/3]).

-opaque message(GXW, GXX, GXY) :: {register, chip(GXW, GXX, GXY)} |
    {demonitor, gleam@erlang@process:process_monitor(), chip(GXW, GXX, GXY)} |
    {lookup,
        gleam@erlang@process:subject({ok, gleam@erlang@process:subject(GXW)} |
            {error, nil}),
        GXX} |
    {members,
        gleam@erlang@process:subject(list(gleam@erlang@process:subject(GXW)))} |
    {members_at,
        gleam@erlang@process:subject(list(gleam@erlang@process:subject(GXW))),
        GXY}.

-opaque chip(GXZ, GYA, GYB) :: {chip,
        gleam@erlang@process:subject(GXZ),
        gleam@option:option(GYA),
        gleam@option:option(GYB)}.

-type state(GYC, GYD, GYE) :: {state,
        gleam@erlang@process:selector(message(GYC, GYD, GYE)),
        gleam@set:set(gleam@erlang@process:subject(GYC)),
        gleam@dict:dict(GYD, gleam@erlang@process:subject(GYC)),
        gleam@dict:dict(GYE, gleam@set:set(gleam@erlang@process:subject(GYC)))}.

-spec new(gleam@erlang@process:subject(GYU)) -> chip(GYU, any(), any()).
new(Subject) ->
    {chip, Subject, none, none}.

-spec tag(chip(GZB, GZC, GZD), GZC) -> chip(GZB, GZC, GZD).
tag(Registrant, Tag) ->
    erlang:setelement(3, Registrant, {some, Tag}).

-spec group(chip(GZK, GZL, GZM), GZM) -> chip(GZK, GZL, GZM).
group(Registrant, Group) ->
    erlang:setelement(4, Registrant, {some, Group}).

-spec register(
    gleam@erlang@process:subject(message(GZT, GZU, GZV)),
    chip(GZT, GZU, GZV)
) -> nil.
register(Registry, Registrant) ->
    gleam@erlang@process:send(Registry, {register, Registrant}).

-spec find(gleam@erlang@process:subject(message(HAC, HAD, any())), HAD) -> {ok,
        gleam@erlang@process:subject(HAC)} |
    {error, nil}.
find(Registry, Tag) ->
    gleam@erlang@process:call(
        Registry,
        fun(_capture) -> {lookup, _capture, Tag} end,
        10
    ).

-spec dispatch(
    gleam@erlang@process:subject(message(HAM, any(), any())),
    fun((gleam@erlang@process:subject(HAM)) -> any())
) -> nil.
dispatch(Registry, Callback) ->
    Subjects = gleam@erlang@process:call(
        Registry,
        fun(_capture) -> {members, _capture} end,
        10
    ),
    gleam@list:each(Subjects, Callback).

-spec dispatch_group(
    gleam@erlang@process:subject(message(HAU, any(), HAW)),
    HAW,
    fun((gleam@erlang@process:subject(HAU)) -> any())
) -> nil.
dispatch_group(Registry, Group, Callback) ->
    Subjects = gleam@erlang@process:call(
        Registry,
        fun(_capture) -> {members_at, _capture, Group} end,
        10
    ),
    gleam@list:each(Subjects, Callback).

-spec init() -> gleam@otp@actor:init_result(state(HBC, HBD, HBE), message(HBC, HBD, HBE)).
init() ->
    Selector = gleam_erlang_ffi:new_selector(),
    {ready,
        {state, Selector, gleam@set:new(), gleam@dict:new(), gleam@dict:new()},
        Selector}.

-spec monitor(state(HCE, HCF, HCG), chip(HCE, HCF, HCG)) -> state(HCE, HCF, HCG).
monitor(State, Registrant) ->
    Pid = gleam@erlang@process:subject_owner(erlang:element(2, Registrant)),
    Monitor = gleam@erlang@process:monitor_process(Pid),
    On_process_down = fun(_) -> {demonitor, Monitor, Registrant} end,
    Selector = begin
        _pipe = erlang:element(2, State),
        gleam@erlang@process:selecting_process_down(
            _pipe,
            Monitor,
            On_process_down
        )
    end,
    erlang:setelement(2, State, Selector).

-spec into_registered(state(HCQ, HCR, HCS), chip(HCQ, HCR, HCS)) -> state(HCQ, HCR, HCS).
into_registered(State, Registrant) ->
    Subjects = erlang:element(3, State),
    Subject = erlang:element(2, Registrant),
    erlang:setelement(3, State, gleam@set:insert(Subjects, Subject)).

-spec into_tagged(state(HDC, HDD, HDE), chip(HDC, HDD, HDE)) -> state(HDC, HDD, HDE).
into_tagged(State, Registrant) ->
    case Registrant of
        {chip, Subject, {some, Tag}, _} ->
            Subjects = erlang:element(4, State),
            Tagged = gleam@dict:insert(Subjects, Tag, Subject),
            erlang:setelement(4, State, Tagged);

        {chip, _, none, _} ->
            State
    end.

-spec into_grouped(state(HDO, HDP, HDQ), chip(HDO, HDP, HDQ)) -> state(HDO, HDP, HDQ).
into_grouped(State, Registrant) ->
    Add_subject = fun(Option) -> case Option of
            {some, Subjects} ->
                gleam@set:insert(Subjects, erlang:element(2, Registrant));

            none ->
                gleam@set:insert(gleam@set:new(), erlang:element(2, Registrant))
        end end,
    case Registrant of
        {chip, _, _, {some, Group}} ->
            Grouped = gleam@dict:update(
                erlang:element(5, State),
                Group,
                Add_subject
            ),
            erlang:setelement(5, State, Grouped);

        {chip, _, _, none} ->
            State
    end.

-spec remove_from_registered(state(HEA, HEB, HEC), chip(HEA, HEB, HEC)) -> state(HEA, HEB, HEC).
remove_from_registered(State, Registrant) ->
    Registered = gleam@set:delete(
        erlang:element(3, State),
        erlang:element(2, Registrant)
    ),
    erlang:setelement(3, State, Registered).

-spec remove_from_tagged(state(HEM, HEN, HEO), chip(HEM, HEN, HEO)) -> state(HEM, HEN, HEO).
remove_from_tagged(State, Registrant) ->
    case Registrant of
        {chip, _, {some, Tag}, _} ->
            Tagged = gleam@dict:delete(erlang:element(4, State), Tag),
            erlang:setelement(4, State, Tagged);

        {chip, _, none, _} ->
            State
    end.

-spec remove_from_grouped(state(HEY, HEZ, HFA), chip(HEY, HEZ, HFA)) -> state(HEY, HEZ, HFA).
remove_from_grouped(State, Registrant) ->
    case Registrant of
        {chip, _, _, {some, Group}} ->
            case gleam@dict:get(erlang:element(5, State), Group) of
                {ok, Subjects} ->
                    Subjects@1 = gleam@set:delete(
                        Subjects,
                        erlang:element(2, Registrant)
                    ),
                    Grouped = gleam@dict:insert(
                        erlang:element(5, State),
                        Group,
                        Subjects@1
                    ),
                    erlang:setelement(5, State, Grouped);

                {error, nil} ->
                    erlang:error(#{gleam_error => panic,
                            message => <<"Impossible state, group was not found on remove_from_grouped."/utf8>>,
                            module => <<"chip"/utf8>>,
                            function => <<"remove_from_grouped"/utf8>>,
                            line => 373})
            end;

        {chip, _, _, none} ->
            State
    end.

-spec loop(message(HBN, HBO, HBP), state(HBN, HBO, HBP)) -> gleam@otp@actor:next(message(HBN, HBO, HBP), state(HBN, HBO, HBP)).
loop(Message, State) ->
    case Message of
        {register, Registrant} ->
            State@1 = monitor(State, Registrant),
            State@2 = begin
                _pipe = State@1,
                _pipe@1 = monitor(_pipe, Registrant),
                _pipe@2 = into_registered(_pipe@1, Registrant),
                _pipe@3 = into_tagged(_pipe@2, Registrant),
                into_grouped(_pipe@3, Registrant)
            end,
            {continue, State@2, {some, erlang:element(2, State@2)}};

        {demonitor, Monitor, Registrant@1} ->
            gleam_erlang_ffi:demonitor(Monitor),
            _pipe@4 = State,
            _pipe@5 = remove_from_registered(_pipe@4, Registrant@1),
            _pipe@6 = remove_from_tagged(_pipe@5, Registrant@1),
            _pipe@7 = remove_from_grouped(_pipe@6, Registrant@1),
            {continue, _pipe@7, none};

        {lookup, Client, Tag} ->
            Result = gleam@dict:get(erlang:element(4, State), Tag),
            gleam@erlang@process:send(Client, Result),
            {continue, State, none};

        {members, Client@1} ->
            Subjects = gleam@set:to_list(erlang:element(3, State)),
            gleam@erlang@process:send(Client@1, Subjects),
            {continue, State, none};

        {members_at, Client@2, Group} ->
            Subjects@2 = case gleam@dict:get(erlang:element(5, State), Group) of
                {ok, Subjects@1} ->
                    gleam@set:to_list(Subjects@1);

                {error, nil} ->
                    []
            end,
            gleam@erlang@process:send(Client@2, Subjects@2),
            {continue, State, none}
    end.

-spec start() -> {ok,
        gleam@erlang@process:subject(message(any(), any(), any()))} |
    {error, gleam@otp@actor:start_error()}.
start() ->
    gleam@otp@actor:start_spec({spec, fun init/0, 10, fun loop/2}).