-module(nakai@render).
-compile(no_auto_import).

-export([render_attr/1, render_attrs/1, render_children/1, render_doctype/1, render_node/1]).

-spec render_attr(gleam@html@attrs:attr()) -> gleam@string_builder:string_builder().
render_attr(Attr) ->
    gleam@string_builder:from_strings(
        [<<" "/utf8>>,
         erlang:element(2, Attr),
         <<"=\""/utf8>>,
         erlang:element(3, Attr),
         <<"\""/utf8>>]
    ).

-spec render_attrs(list(gleam@html@attrs:attr())) -> gleam@string_builder:string_builder().
render_attrs(Attrs) ->
    _pipe = Attrs,
    _pipe@1 = gleam@list:map(_pipe, fun render_attr/1),
    gleam@string_builder:concat(_pipe@1).

-spec render_children(list(nakai@nakai:node_())) -> gleam@string_builder:string_builder().
render_children(Children) ->
    _pipe = Children,
    _pipe@1 = gleam@list:map(_pipe, fun render_node/1),
    gleam@string_builder:concat(_pipe@1).

-spec render_doctype(gleam@html@doctype:doctype()) -> gleam@string_builder:string_builder().
render_doctype(Doctype) ->
    gleam@string_builder:from_strings(
        [<<"<!DOCTYPE "/utf8>>, erlang:element(2, Doctype), <<">"/utf8>>]
    ).

-spec render_node(nakai@nakai:node_()) -> gleam@string_builder:string_builder().
render_node(Tree) ->
    case Tree of
        {component, Factory} ->
            render_node(Factory());

        {fragment, Children} ->
            render_children(Children);

        {html_node, Html_node} ->
            case Html_node of
                {comment, Content} ->
                    gleam@string_builder:from_strings(
                        [<<"<!-- "/utf8>>, Content, <<" -->"/utf8>>]
                    );

                {element, Tag, Attrs, Children@1} ->
                    gleam@string_builder:concat(
                        [gleam@string_builder:from_strings([<<"<"/utf8>>, Tag]),
                         render_attrs(Attrs),
                         gleam@string_builder:from_string(<<">"/utf8>>),
                         render_children(
                             gleam@list:map(
                                 Children@1,
                                 fun(A) -> {html_node, A} end
                             )
                         ),
                         gleam@string_builder:from_strings(
                             [<<"</"/utf8>>, Tag, <<">"/utf8>>]
                         )]
                    );

                {leaf_element, Tag@1, Attrs@1} ->
                    gleam@string_builder:concat(
                        [gleam@string_builder:from_strings(
                             [<<"<"/utf8>>, Tag@1]
                         ),
                         render_attrs(Attrs@1),
                         gleam@string_builder:from_string(<<" />"/utf8>>)]
                    );

                {text, Content@1} ->
                    gleam@string_builder:from_string(Content@1)
            end;

        none ->
            gleam@string_builder:new()
    end.