-module(lustre@element).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([element/3, namespaced/4, advanced/6, text/1, none/0, map/2, to_string/1, to_string_builder/1]).
-export_type([element/1]).

-opaque element(HUZ) :: {text, binary()} |
    {element,
        binary(),
        binary(),
        list(lustre@attribute:attribute(HUZ)),
        list(element(HUZ)),
        boolean(),
        boolean()}.

-spec element(
    binary(),
    list(lustre@attribute:attribute(HVA)),
    list(element(HVA))
) -> element(HVA).
element(Tag, Attrs, Children) ->
    case Tag of
        <<"area"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"base"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"br"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"col"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"embed"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"hr"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"img"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"input"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"link"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"meta"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"param"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"source"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"track"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        <<"wbr"/utf8>> ->
            {element, <<""/utf8>>, Tag, Attrs, [], false, true};

        _ ->
            {element, <<""/utf8>>, Tag, Attrs, Children, false, false}
    end.

-spec namespaced(
    binary(),
    binary(),
    list(lustre@attribute:attribute(HVG)),
    list(element(HVG))
) -> element(HVG).
namespaced(Namespace, Tag, Attrs, Children) ->
    {element, Namespace, Tag, Attrs, Children, false, false}.

-spec advanced(
    binary(),
    binary(),
    list(lustre@attribute:attribute(HVM)),
    list(element(HVM)),
    boolean(),
    boolean()
) -> element(HVM).
advanced(Namespace, Tag, Attrs, Children, Self_closing, Void) ->
    {element, Tag, Namespace, Attrs, Children, Self_closing, Void}.

-spec text(binary()) -> element(any()).
text(Content) ->
    {text, Content}.

-spec none() -> element(any()).
none() ->
    {text, <<""/utf8>>}.

-spec escape(binary(), binary()) -> binary().
escape(Escaped, Content) ->
    case Content of
        <<"<"/utf8, Rest/binary>> ->
            escape(<<Escaped/binary, "&lt;"/utf8>>, Rest);

        <<">"/utf8, Rest@1/binary>> ->
            escape(<<Escaped/binary, "&gt;"/utf8>>, Rest@1);

        <<"&"/utf8, Rest@2/binary>> ->
            escape(<<Escaped/binary, "&amp;"/utf8>>, Rest@2);

        <<"\""/utf8, Rest@3/binary>> ->
            escape(<<Escaped/binary, "&quot;"/utf8>>, Rest@3);

        <<"'"/utf8, Rest@4/binary>> ->
            escape(<<Escaped/binary, "&#39;"/utf8>>, Rest@4);

        _ ->
            case gleam@string:pop_grapheme(Content) of
                {ok, {X, Xs}} ->
                    escape(<<Escaped/binary, X/binary>>, Xs);

                {error, _} ->
                    Escaped
            end
    end.

-spec map(element(HVW), fun((HVW) -> HVY)) -> element(HVY).
map(Element, F) ->
    case Element of
        {text, Content} ->
            {text, Content};

        {element, Namespace, Tag, Attrs, Children, Self_closing, Void} ->
            {element,
                Namespace,
                Tag,
                gleam@list:map(
                    Attrs,
                    fun(_capture) -> lustre@attribute:map(_capture, F) end
                ),
                gleam@list:map(
                    Children,
                    fun(_capture@1) -> map(_capture@1, F) end
                ),
                Self_closing,
                Void}
    end.

-spec attrs_to_string_builder(list(lustre@attribute:attribute(any()))) -> {gleam@string_builder:string_builder(),
    binary()}.
attrs_to_string_builder(Attrs) ->
    {Html@1, Class@1, Style@1, Inner_html@1} = begin
        Init = {gleam@string_builder:new(),
            <<""/utf8>>,
            <<""/utf8>>,
            <<""/utf8>>},
        gleam@list:fold(
            Attrs,
            Init,
            fun(_use0, Attr) ->
                {Html, Class, Style, Inner_html} = _use0,
                case lustre@attribute:to_string_parts(Attr) of
                    {ok, {<<"dangerous-unescaped-html"/utf8>>, Val}} ->
                        {Html, Class, Style, <<Inner_html/binary, Val/binary>>};

                    {ok, {<<"class"/utf8>>, Val@1}} when Class =:= <<""/utf8>> ->
                        {Html, Val@1, Style, Inner_html};

                    {ok, {<<"class"/utf8>>, Val@2}} ->
                        {Html,
                            <<<<Class/binary, " "/utf8>>/binary, Val@2/binary>>,
                            Style,
                            Inner_html};

                    {ok, {<<"style"/utf8>>, Val@3}} when Style =:= <<""/utf8>> ->
                        {Html, Class, Val@3, Inner_html};

                    {ok, {<<"style"/utf8>>, Val@4}} ->
                        {Html,
                            Class,
                            <<<<Style/binary, " "/utf8>>/binary, Val@4/binary>>,
                            Inner_html};

                    {ok, {Key, Val@5}} ->
                        {gleam@string_builder:append(
                                Html,
                                <<<<<<<<" "/utf8, Key/binary>>/binary,
                                            "=\""/utf8>>/binary,
                                        Val@5/binary>>/binary,
                                    "\""/utf8>>
                            ),
                            Class,
                            Style,
                            Inner_html};

                    {error, _} ->
                        {Html, Class, Style, Inner_html}
                end
            end
        )
    end,
    {case {Class@1, Style@1} of
            {<<""/utf8>>, <<""/utf8>>} ->
                Html@1;

            {_, <<""/utf8>>} ->
                gleam@string_builder:append(
                    Html@1,
                    <<<<" class=\""/utf8, Class@1/binary>>/binary, "\""/utf8>>
                );

            {<<""/utf8>>, _} ->
                gleam@string_builder:append(
                    Html@1,
                    <<<<" style=\""/utf8, Style@1/binary>>/binary, "\""/utf8>>
                );

            {_, _} ->
                gleam@string_builder:append(
                    Html@1,
                    <<<<<<<<" class=\""/utf8, Class@1/binary>>/binary,
                                "\" style=\""/utf8>>/binary,
                            Style@1/binary>>/binary,
                        "\""/utf8>>
                )
        end, Inner_html@1}.

-spec children_to_string_builder(
    gleam@string_builder:string_builder(),
    list(element(any())),
    boolean()
) -> gleam@string_builder:string_builder().
children_to_string_builder(Html, Children, Raw_text) ->
    gleam@list:fold(
        Children,
        Html,
        fun(Html@1, Child) ->
            gleam@string_builder:append_builder(
                Html@1,
                to_string_builder_helper(Child, Raw_text)
            )
        end
    ).

-spec to_string_builder_helper(element(any()), boolean()) -> gleam@string_builder:string_builder().
to_string_builder_helper(Element, Raw_text) ->
    case Element of
        {text, <<""/utf8>>} ->
            gleam@string_builder:new();

        {text, Content} when Raw_text ->
            gleam@string_builder:from_string(Content);

        {text, Content@1} ->
            gleam@string_builder:from_string(escape(<<""/utf8>>, Content@1));

        {element, Namespace, Tag, Attrs, _, Self_closing, _} when Self_closing ->
            Html = gleam@string_builder:from_string(<<"<"/utf8, Tag/binary>>),
            {Attrs@1, _} = attrs_to_string_builder(case Namespace of
                    <<""/utf8>> ->
                        Attrs;

                    _ ->
                        [lustre@attribute:attribute(<<"xmlns"/utf8>>, Namespace) |
                            Attrs]
                end),
            _pipe = Html,
            _pipe@1 = gleam@string_builder:append_builder(_pipe, Attrs@1),
            gleam@string_builder:append(_pipe@1, <<"/>"/utf8>>);

        {element, Namespace@1, Tag@1, Attrs@2, _, _, Void} when Void ->
            Html@1 = gleam@string_builder:from_string(
                <<"<"/utf8, Tag@1/binary>>
            ),
            {Attrs@3, _} = attrs_to_string_builder(case Namespace@1 of
                    <<""/utf8>> ->
                        Attrs@2;

                    _ ->
                        [lustre@attribute:attribute(
                                <<"xmlns"/utf8>>,
                                Namespace@1
                            ) |
                            Attrs@2]
                end),
            _pipe@2 = Html@1,
            _pipe@3 = gleam@string_builder:append_builder(_pipe@2, Attrs@3),
            gleam@string_builder:append(_pipe@3, <<">"/utf8>>);

        {element,
            <<""/utf8>>,
            <<"style"/utf8>> = Tag@2,
            Attrs@4,
            Children,
            false,
            false} ->
            Html@2 = gleam@string_builder:from_string(
                <<"<"/utf8, Tag@2/binary>>
            ),
            {Attrs@5, _} = attrs_to_string_builder(Attrs@4),
            _pipe@4 = Html@2,
            _pipe@5 = gleam@string_builder:append_builder(_pipe@4, Attrs@5),
            _pipe@6 = gleam@string_builder:append(_pipe@5, <<">"/utf8>>),
            _pipe@7 = children_to_string_builder(_pipe@6, Children, true),
            gleam@string_builder:append(
                _pipe@7,
                <<<<"</"/utf8, Tag@2/binary>>/binary, ">"/utf8>>
            );

        {element,
            <<""/utf8>>,
            <<"script"/utf8>> = Tag@2,
            Attrs@4,
            Children,
            false,
            false} ->
            Html@2 = gleam@string_builder:from_string(
                <<"<"/utf8, Tag@2/binary>>
            ),
            {Attrs@5, _} = attrs_to_string_builder(Attrs@4),
            _pipe@4 = Html@2,
            _pipe@5 = gleam@string_builder:append_builder(_pipe@4, Attrs@5),
            _pipe@6 = gleam@string_builder:append(_pipe@5, <<">"/utf8>>),
            _pipe@7 = children_to_string_builder(_pipe@6, Children, true),
            gleam@string_builder:append(
                _pipe@7,
                <<<<"</"/utf8, Tag@2/binary>>/binary, ">"/utf8>>
            );

        {element, Namespace@2, Tag@3, Attrs@6, Children@1, _, _} ->
            Html@3 = gleam@string_builder:from_string(
                <<"<"/utf8, Tag@3/binary>>
            ),
            {Attrs@7, Inner_html} = attrs_to_string_builder(case Namespace@2 of
                    <<""/utf8>> ->
                        Attrs@6;

                    _ ->
                        [lustre@attribute:attribute(
                                <<"xmlns"/utf8>>,
                                Namespace@2
                            ) |
                            Attrs@6]
                end),
            case Inner_html of
                <<""/utf8>> ->
                    _pipe@8 = Html@3,
                    _pipe@9 = gleam@string_builder:append_builder(
                        _pipe@8,
                        Attrs@7
                    ),
                    _pipe@10 = gleam@string_builder:append(
                        _pipe@9,
                        <<">"/utf8>>
                    ),
                    _pipe@11 = children_to_string_builder(
                        _pipe@10,
                        Children@1,
                        Raw_text
                    ),
                    gleam@string_builder:append(
                        _pipe@11,
                        <<<<"</"/utf8, Tag@3/binary>>/binary, ">"/utf8>>
                    );

                _ ->
                    _pipe@12 = Html@3,
                    _pipe@13 = gleam@string_builder:append_builder(
                        _pipe@12,
                        Attrs@7
                    ),
                    gleam@string_builder:append(
                        _pipe@13,
                        <<<<<<<<">"/utf8, Inner_html/binary>>/binary,
                                    "</"/utf8>>/binary,
                                Tag@3/binary>>/binary,
                            ">"/utf8>>
                    )
            end
    end.

-spec to_string(element(any())) -> binary().
to_string(Element) ->
    _pipe = to_string_builder_helper(Element, false),
    gleam@string_builder:to_string(_pipe).

-spec to_string_builder(element(any())) -> gleam@string_builder:string_builder().
to_string_builder(Element) ->
    to_string_builder_helper(Element, false).