sprocket

-module(sprocket@hooks).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([callback/4, client/4, effect/4, handler/3, memo/4, provider/3, reducer/4, state/3]).
-export_type([state_or_dispatch_reducer/2]).

-type state_or_dispatch_reducer(KMG, KMH) :: shutdown |
    {state_reducer, gleam@erlang@process:subject(KMG)} |
    {dispatch_reducer, fun((KMG, KMH) -> KMG), KMH}.

-spec maybe_trigger_update(
    sprocket@context:hook_trigger(),
    gleam@option:option(list(gleam@dynamic:dynamic_())),
    KMM,
    fun(() -> KMM)
) -> {KMM, gleam@option:option(list(gleam@dynamic:dynamic_()))}.
maybe_trigger_update(Trigger, Prev, Value, Updater) ->
    case Trigger of
        on_mount ->
            {Updater(), {some, []}};

        on_update ->
            {Updater(), none};

        {with_deps, Deps} ->
            case Prev of
                {some, Prev_deps} ->
                    case sprocket@context:compare_deps(Prev_deps, Deps) of
                        {changed, New_deps} ->
                            {Updater(), {some, New_deps}};

                        unchanged ->
                            {Value, Prev}
                    end;

                none ->
                    {Updater(), {some, Deps}}
            end
    end.

-spec callback(
    sprocket@context:context(),
    fun(() -> nil),
    sprocket@context:hook_trigger(),
    fun((sprocket@context:context(), fun(() -> nil)) -> {KMK,
        sprocket@context:element()})
) -> {KMK, sprocket@context:element()}.
callback(Ctx, Callback_fn, Trigger, Cb) ->
    _assert_subject = sprocket@context:fetch_or_init_hook(
        Ctx,
        fun() ->
            {callback,
                sprocket@internal@utils@unique:cuid(erlang:element(8, Ctx)),
                Callback_fn,
                none}
        end
    ),
    {Ctx@1, {callback, Id, Current_callback_fn, Prev}, Index} = case _assert_subject of
        {_, {callback, _, _, _}, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"sprocket/hooks"/utf8>>,
                        function => <<"callback"/utf8>>,
                        line => 32})
    end,
    {Callback_fn@1, Deps} = maybe_trigger_update(
        Trigger,
        begin
            _pipe = Prev,
            gleam@option:then(
                _pipe,
                fun(Prev@1) -> erlang:element(2, Prev@1) end
            )
        end,
        Current_callback_fn,
        fun() -> Callback_fn end
    ),
    Ctx@2 = sprocket@context:update_hook(
        Ctx@1,
        {callback, Id, Callback_fn@1, {some, {callback_result, Deps}}},
        Index
    ),
    Cb(Ctx@2, Callback_fn@1).

-spec client(
    sprocket@context:context(),
    binary(),
    gleam@option:option(fun((binary(), gleam@option:option(gleam@dynamic:dynamic_()), fun((binary(), gleam@option:option(binary())) -> {ok,
            nil} |
        {error, nil})) -> nil)),
    fun((sprocket@context:context(), fun(() -> sprocket@context:attribute()), fun((binary(), gleam@option:option(binary())) -> {ok,
            nil} |
        {error, nil})) -> {sprocket@context:context(),
        sprocket@context:element()})
) -> {sprocket@context:context(), sprocket@context:element()}.
client(Ctx, Name, Handle_event, Cb) ->
    Init = fun() ->
        {client,
            sprocket@internal@utils@unique:cuid(erlang:element(8, Ctx)),
            Name,
            Handle_event}
    end,
    _assert_subject = sprocket@context:fetch_or_init_hook(Ctx, Init),
    {Ctx@1, {client, Id, _, _}, Index} = case _assert_subject of
        {_, {client, _, _, _}, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"sprocket/hooks"/utf8>>,
                        function => <<"client"/utf8>>,
                        line => 105})
    end,
    Ctx@2 = sprocket@context:update_hook(
        Ctx@1,
        {client, Id, Name, Handle_event},
        Index
    ),
    Bind_hook_attr = fun() -> {client_hook, Id, Name} end,
    Dispatch_event = fun(Name@1, Payload) ->
        sprocket@context:dispatch_event(Ctx@2, Id, Name@1, Payload)
    end,
    Cb(Ctx@2, Bind_hook_attr, Dispatch_event).

-spec effect(
    sprocket@context:context(),
    fun(() -> gleam@option:option(fun(() -> nil))),
    sprocket@context:hook_trigger(),
    fun((sprocket@context:context()) -> {sprocket@context:context(),
        sprocket@context:element()})
) -> {sprocket@context:context(), sprocket@context:element()}.
effect(Ctx, Effect_fn, Trigger, Cb) ->
    Init = fun() ->
        {effect,
            sprocket@internal@utils@unique:cuid(erlang:element(8, Ctx)),
            Effect_fn,
            Trigger,
            none}
    end,
    _assert_subject = sprocket@context:fetch_or_init_hook(Ctx, Init),
    {Ctx@1, {effect, Id, _, _, Prev}, Index} = case _assert_subject of
        {_, {effect, _, _, _, _}, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"sprocket/hooks"/utf8>>,
                        function => <<"effect"/utf8>>,
                        line => 137})
    end,
    Ctx@2 = sprocket@context:update_hook(
        Ctx@1,
        {effect, Id, Effect_fn, Trigger, Prev},
        Index
    ),
    Cb(Ctx@2).

-spec handler(
    sprocket@context:context(),
    fun((gleam@option:option(sprocket@context:callback_param())) -> nil),
    fun((sprocket@context:context(), sprocket@context:identifiable_handler()) -> {KMP,
        sprocket@context:element()})
) -> {KMP, sprocket@context:element()}.
handler(Ctx, Handler_fn, Cb) ->
    _assert_subject = sprocket@context:fetch_or_init_hook(
        Ctx,
        fun() ->
            {handler,
                sprocket@internal@utils@unique:cuid(erlang:element(8, Ctx)),
                Handler_fn}
        end
    ),
    {Ctx@1, {handler, Id, _}, Index} = case _assert_subject of
        {_, {handler, _, _}, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"sprocket/hooks"/utf8>>,
                        function => <<"handler"/utf8>>,
                        line => 157})
    end,
    Ctx@2 = sprocket@context:update_hook(
        Ctx@1,
        {handler, Id, Handler_fn},
        Index
    ),
    Cb(Ctx@2, {identifiable_handler, Id, Handler_fn}).

-spec memo(
    sprocket@context:context(),
    fun(() -> KMQ),
    sprocket@context:hook_trigger(),
    fun((sprocket@context:context(), KMQ) -> {sprocket@context:context(),
        sprocket@context:element()})
) -> {sprocket@context:context(), sprocket@context:element()}.
memo(Ctx, Memo_fn, Trigger, Cb) ->
    _assert_subject = sprocket@context:fetch_or_init_hook(
        Ctx,
        fun() ->
            {memo,
                sprocket@internal@utils@unique:cuid(erlang:element(8, Ctx)),
                gleam@dynamic:from(Memo_fn()),
                none}
        end
    ),
    {Ctx@1, {memo, Id, Current_memoized, Prev}, Index} = case _assert_subject of
        {_, {memo, _, _, _}, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"sprocket/hooks"/utf8>>,
                        function => <<"memo"/utf8>>,
                        line => 181})
    end,
    {Memoized, Deps} = maybe_trigger_update(
        Trigger,
        begin
            _pipe = Prev,
            gleam@option:then(
                _pipe,
                fun(Prev@1) -> erlang:element(2, Prev@1) end
            )
        end,
        Current_memoized,
        fun() -> gleam@dynamic:from(Memo_fn()) end
    ),
    Ctx@2 = sprocket@context:update_hook(
        Ctx@1,
        {memo, Id, Memoized, {some, {memo_result, Deps}}},
        Index
    ),
    Cb(Ctx@2, gleam@dynamic:unsafe_coerce(Memoized)).

-spec provider(
    sprocket@context:context(),
    binary(),
    fun((sprocket@context:context(), gleam@option:option(any())) -> {sprocket@context:context(),
        sprocket@context:element()})
) -> {sprocket@context:context(), sprocket@context:element()}.
provider(Ctx, Key, Cb) ->
    Value = begin
        _pipe = erlang:element(9, Ctx),
        _pipe@1 = gleam@dict:get(_pipe, Key),
        _pipe@2 = gleam@option:from_result(_pipe@1),
        gleam@option:map(_pipe@2, fun(V) -> gleam@dynamic:unsafe_coerce(V) end)
    end,
    Cb(Ctx, Value).

-spec reducer(
    sprocket@context:context(),
    KMT,
    fun((KMT, KMU) -> KMT),
    fun((sprocket@context:context(), KMT, fun((KMU) -> nil)) -> {sprocket@context:context(),
        sprocket@context:element()})
) -> {sprocket@context:context(), sprocket@context:element()}.
reducer(Ctx, Initial, Reducer, Cb) ->
    {context, _, _, _, Render_update, _, _, _, _} = Ctx,
    Reducer_init = fun() ->
        _assert_subject = begin
            _pipe@1 = gleam@otp@actor:start(
                Initial,
                fun(Message, State) -> case Message of
                        shutdown ->
                            {stop, normal};

                        {state_reducer, Reply_with} ->
                            gleam@erlang@process:send(Reply_with, State),
                            gleam@otp@actor:continue(State);

                        {dispatch_reducer, R, M} ->
                            _pipe = R(State, M),
                            gleam@otp@actor:continue(_pipe)
                    end end
            ),
            gleam@result:map_error(
                _pipe@1,
                fun(Error) ->
                    sprocket@internal@logger:error(
                        <<"hooks.reducer: failed to start reducer actor"/utf8>>
                    ),
                    Error
                end
            )
        end,
        {ok, Reducer_actor} = case _assert_subject of
            {ok, _} -> _assert_subject;
            _assert_fail ->
                erlang:error(#{gleam_error => let_assert,
                            message => <<"Assertion pattern match failed"/utf8>>,
                            value => _assert_fail,
                            module => <<"sprocket/hooks"/utf8>>,
                            function => <<"reducer"/utf8>>,
                            line => 253})
        end,
        {reducer,
            sprocket@internal@utils@unique:cuid(erlang:element(8, Ctx)),
            gleam@dynamic:from(Reducer_actor),
            fun() -> gleam@erlang@process:send(Reducer_actor, shutdown) end}
    end,
    _assert_subject@1 = sprocket@context:fetch_or_init_hook(Ctx, Reducer_init),
    {Ctx@1, {reducer, _, Dyn_reducer_actor, _}, _} = case _assert_subject@1 of
        {_, {reducer, _, _, _}, _} -> _assert_subject@1;
        _assert_fail@1 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail@1,
                        module => <<"sprocket/hooks"/utf8>>,
                        function => <<"reducer"/utf8>>,
                        line => 284})
    end,
    Reducer_actor@1 = gleam@dynamic:unsafe_coerce(Dyn_reducer_actor),
    State@1 = gleam@erlang@process:call(
        Reducer_actor@1,
        fun(_capture) -> {state_reducer, _capture} end,
        1000
    ),
    Dispatch = fun(Msg) ->
        gleam@otp@actor:send(Reducer_actor@1, {dispatch_reducer, Reducer, Msg}),
        Render_update()
    end,
    Cb(Ctx@1, State@1, Dispatch).

-spec state(
    sprocket@context:context(),
    KMX,
    fun((sprocket@context:context(), KMX, fun((KMX) -> nil)) -> {sprocket@context:context(),
        sprocket@context:element()})
) -> {sprocket@context:context(), sprocket@context:element()}.
state(Ctx, Initial, Cb) ->
    {context, _, _, _, Render_update, Update_hook, _, _, _} = Ctx,
    Init_state = fun() ->
        {state,
            sprocket@internal@utils@unique:cuid(erlang:element(8, Ctx)),
            gleam@dynamic:from(Initial)}
    end,
    _assert_subject = sprocket@context:fetch_or_init_hook(Ctx, Init_state),
    {Ctx@1, {state, Hook_id, Value}, _} = case _assert_subject of
        {_, {state, _, _}, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"sprocket/hooks"/utf8>>,
                        function => <<"state"/utf8>>,
                        line => 324})
    end,
    Setter = fun(Value@1) ->
        Update_hook(Hook_id, fun(Hook) -> case Hook of
                    {state, Id, _} when Id =:= Hook_id ->
                        {state, Id, gleam@dynamic:from(Value@1)};

                    _ ->
                        sprocket@internal@exceptions:throw_on_unexpected_hook_result(
                            Hook
                        )
                end end),
        Render_update()
    end,
    Cb(Ctx@1, gleam@dynamic:unsafe_coerce(Value), Setter).