-module(sprocket@internal@render@json).
-compile([no_auto_import, nowarn_unused_vars]).

-export([renderer/0]).

-spec text(binary()) -> gleam@json:json().
text(T) ->
    gleam@json:string(T).

-spec element(
    binary(),
    gleam@option:option(binary()),
    list(sprocket@render:rendered_attribute()),
    list(sprocket@render:rendered_element())
) -> gleam@json:json().
element(Tag, Key, Attrs, Children) ->
    Attrs@1 = begin
        _pipe = Attrs,
        gleam@list:map(_pipe, fun(Attr) -> case Attr of
                    {rendered_attribute, Name, Value} ->
                        {Name, gleam@json:string(Value)};

                    {rendered_event_handler, Kind, Id} ->
                        {gleam@string:concat(
                                [sprocket@internal@constants:constant(
                                        event_attr_prefix
                                    ),
                                    <<"-"/utf8>>,
                                    Kind]
                            ),
                            gleam@json:string(Id)}
                end end)
    end,
    Attrs@2 = case Key of
        {some, K} ->
            gleam@list:append(
                Attrs@1,
                [{sprocket@internal@constants:constant(key_attr),
                        gleam@json:string(K)}]
            );

        none ->
            Attrs@1
    end,
    Children@1 = begin
        _pipe@1 = Children,
        gleam@list:index_map(
            _pipe@1,
            fun(I, Child) -> {gleam@int:to_string(I), render(Child)} end
        )
    end,
    _pipe@2 = [{<<"type"/utf8>>, gleam@json:string(Tag)},
        {<<"attrs"/utf8>>, gleam@json:object(Attrs@2)}],
    _pipe@3 = gleam@list:append(_pipe@2, Children@1),
    gleam@json:object(_pipe@3).

-spec render(sprocket@render:rendered_element()) -> gleam@json:json().
render(El) ->
    case El of
        {rendered_element, Tag, Key, Attrs, Children} ->
            element(Tag, Key, Attrs, Children);

        {rendered_component, _, _, _, _, Children@1} ->
            component(Children@1);

        {rendered_text, T} ->
            text(T)
    end.

-spec renderer() -> sprocket@render:renderer(gleam@json:json()).
renderer() ->
    {renderer, fun(El) -> render(El) end}.

-spec component(list(sprocket@render:rendered_element())) -> gleam@json:json().
component(Children) ->
    Children@1 = begin
        _pipe = Children,
        gleam@list:index_map(
            _pipe,
            fun(I, Child) -> {gleam@int:to_string(I), render(Child)} end
        )
    end,
    _pipe@1 = [{<<"type"/utf8>>, gleam@json:string(<<"component"/utf8>>)}],
    _pipe@2 = gleam@list:append(_pipe@1, Children@1),
    gleam@json:object(_pipe@2).