-module(nakai@codegen).
-compile([no_auto_import, nowarn_unused_vars]).

-export([main/0]).
-export_type([element_description/0, attr_description/0]).

-type element_description() :: {element, binary(), boolean()}.

-type attr_description() :: {attr, binary()} | {const_attr, binary(), binary()}.

-spec element_decoder(gleam@dynamic:dynamic()) -> {ok, element_description()} |
    {error, list(gleam@dynamic:decode_error())}.
element_decoder(Value) ->
    (gleam@dynamic:decode2(
        fun(Field@0, Field@1) -> {element, Field@0, Field@1} end,
        gleam@dynamic:field(<<"name"/utf8>>, fun gleam@dynamic:string/1),
        gleam@dynamic:field(<<"leaf"/utf8>>, fun gleam@dynamic:bool/1)
    ))(Value).

-spec codegen_element(element_description()) -> binary().
codegen_element(Element) ->
    case Element of
        {element, Name, Leaf} when Leaf =:= false ->
            <<<<<<<<<<<<<<<<<<<<<<<<<<<<"
/// The HTML [`<"/utf8, Name/binary>>/binary,
                                                                ">`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/"/utf8>>/binary,
                                                            Name/binary>>/binary,
                                                        ") element
pub fn "/utf8>>/binary,
                                                    Name/binary>>/binary,
                                                "(attrs: List(Attr(a)), children: List(Node(a))) -> Node(a) {
  Element(tag: \""/utf8>>/binary,
                                            Name/binary>>/binary,
                                        "\", attrs: attrs, children: children)
}

/// Shorthand for `html."/utf8>>/binary,
                                    Name/binary>>/binary,
                                "(attrs, children: [html.Text(text)])`
pub fn "/utf8>>/binary,
                            Name/binary>>/binary,
                        "_text(attrs: List(Attr(a)), text: String) -> Node(a) {
  Element(tag: \""/utf8>>/binary,
                    Name/binary>>/binary,
                "\", attrs: attrs, children: [Text(text)])
}
"/utf8>>;

        {element, Name@1, Leaf@1} when Leaf@1 =:= true ->
            <<<<<<<<<<<<<<<<"
/// The HTML [`<"/utf8, Name@1/binary>>/binary,
                                        " />`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/"/utf8>>/binary,
                                    Name@1/binary>>/binary,
                                ") element
pub fn "/utf8>>/binary,
                            Name@1/binary>>/binary,
                        "(attrs: List(Attr(a))) -> Node(a) {
  LeafElement(tag: \""/utf8>>/binary,
                    Name@1/binary>>/binary,
                "\", attrs: attrs)
}
"/utf8>>;

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"panic expression evaluated"/utf8>>,
                    module => <<"nakai/codegen"/utf8>>,
                    function => <<"codegen_element"/utf8>>,
                    line => 60})
    end.

-spec generate_nakai_html() -> {ok, nil} | {error, nil}.
generate_nakai_html() ->
    gleam@result:then(
        begin
            _pipe = gleam@erlang@file:read(<<"./codegen/html.json"/utf8>>),
            gleam@result:nil_error(_pipe)
        end,
        fun(Html_json) ->
            gleam@result:then(
                begin
                    _pipe@1 = gleam@json:decode(
                        Html_json,
                        gleam@dynamic:list(fun element_decoder/1)
                    ),
                    gleam@result:nil_error(_pipe@1)
                end,
                fun(Html) ->
                    gleam@result:then(
                        begin
                            _pipe@2 = gleam@erlang@file:read(
                                <<"./codegen/html_prelude.gleam"/utf8>>
                            ),
                            gleam@result:nil_error(_pipe@2)
                        end,
                        fun(Html_prelude) ->
                            Code = begin
                                _pipe@3 = Html,
                                _pipe@4 = gleam@list:map(
                                    _pipe@3,
                                    fun codegen_element/1
                                ),
                                gleam@string:concat(_pipe@4)
                            end,
                            gleam@result:then(
                                begin
                                    _pipe@5 = gleam@erlang@file:write(
                                        gleam@string:concat(
                                            [<<"





// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
// * THIS FILE IS GENERATED. DO NOT EDIT IT.                                             *
// * You're probably looking for ./codegen/html_prelude.gleam, or ./codegen/html.json.   *
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *





"/utf8>>,
                                                Html_prelude,
                                                Code]
                                        ),
                                        <<"./src/nakai/html.gleam"/utf8>>
                                    ),
                                    gleam@result:nil_error(_pipe@5)
                                end,
                                fun(_) -> {ok, nil} end
                            )
                        end
                    )
                end
            )
        end
    ).

-spec attr_decoder(gleam@dynamic:dynamic()) -> {ok, attr_description()} |
    {error, list(gleam@dynamic:decode_error())}.
attr_decoder(Value) ->
    Attr_decoder = gleam@dynamic:decode1(
        fun(Field@0) -> {attr, Field@0} end,
        gleam@dynamic:field(<<"name"/utf8>>, fun gleam@dynamic:string/1)
    ),
    Constattr_decoder = gleam@dynamic:decode2(
        fun(Field@0, Field@1) -> {const_attr, Field@0, Field@1} end,
        gleam@dynamic:field(<<"name"/utf8>>, fun gleam@dynamic:string/1),
        gleam@dynamic:field(<<"value"/utf8>>, fun gleam@dynamic:string/1)
    ),
    _pipe = Constattr_decoder(Value),
    gleam@result:lazy_or(_pipe, fun() -> Attr_decoder(Value) end).

-spec codegen_attr(attr_description()) -> binary().
codegen_attr(Attr) ->
    Name@1 = case erlang:element(2, Attr) of
        <<"type"/utf8>> ->
            <<"type_"/utf8>>;

        Name ->
            _pipe = Name,
            gleam@string:replace(_pipe, <<"-"/utf8>>, <<"_"/utf8>>)
    end,
    case Attr of
        {attr, _} ->
            <<<<<<<<"
pub fn "/utf8, Name@1/binary>>/binary,
                        "(value: String) -> Attr(a) {
  Attr(name: \""/utf8>>/binary,
                    Name@1/binary>>/binary,
                "\", value: value)
}
"/utf8>>;

        {const_attr, _, Value} ->
            <<<<<<<<<<<<"
pub fn "/utf8, Name@1/binary>>/binary,
                                "() -> Attr(a) {
  Attr(name: \""/utf8>>/binary,
                            Name@1/binary>>/binary,
                        "\", value: \""/utf8>>/binary,
                    Value/binary>>/binary,
                "\")
}
"/utf8>>
    end.

-spec generate_nakai_html_attrs() -> {ok, nil} | {error, nil}.
generate_nakai_html_attrs() ->
    gleam@result:then(
        begin
            _pipe = gleam@erlang@file:read(<<"./codegen/attrs.json"/utf8>>),
            gleam@result:nil_error(_pipe)
        end,
        fun(Attrs_json) ->
            gleam@result:then(
                begin
                    _pipe@1 = gleam@json:decode(
                        Attrs_json,
                        gleam@dynamic:list(fun attr_decoder/1)
                    ),
                    gleam@result:nil_error(_pipe@1)
                end,
                fun(Attrs) ->
                    gleam@result:then(
                        begin
                            _pipe@2 = gleam@erlang@file:read(
                                <<"./codegen/attrs_prelude.gleam"/utf8>>
                            ),
                            gleam@result:nil_error(_pipe@2)
                        end,
                        fun(Attrs_prelude) ->
                            Code = begin
                                _pipe@3 = Attrs,
                                _pipe@4 = gleam@list:map(
                                    _pipe@3,
                                    fun codegen_attr/1
                                ),
                                gleam@string:concat(_pipe@4)
                            end,
                            gleam@result:then(
                                begin
                                    _pipe@5 = gleam@erlang@file:write(
                                        gleam@string:concat(
                                            [<<"





// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
// * THIS FILE IS GENERATED. DO NOT EDIT IT.                                             *
// * You're probably looking for ./codegen/attrs_prelude.gleam, or ./codegen/attrs.json. *
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *





"/utf8>>,
                                                Attrs_prelude,
                                                Code]
                                        ),
                                        <<"./src/nakai/html/attrs.gleam"/utf8>>
                                    ),
                                    gleam@result:nil_error(_pipe@5)
                                end,
                                fun(_) -> {ok, nil} end
                            )
                        end
                    )
                end
            )
        end
    ).

-spec main() -> {ok, nil} | {error, nil}.
main() ->
    gleam@result:then(
        generate_nakai_html(),
        fun(_) ->
            gleam@result:then(
                generate_nakai_html_attrs(),
                fun(_) -> {ok, nil} end
            )
        end
    ).