-module(glugify@internal@entities).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/glugify/internal/entities.gleam").
-export([decode/1]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

?MODULEDOC(false).

-file("src/glugify/internal/entities.gleam", 99).
?DOC(false).
-spec codepoint_to_string(integer()) -> {ok, binary()} | {error, nil}.
codepoint_to_string(Code) ->
    case gleam@string:utf_codepoint(Code) of
        {ok, Codepoint} ->
            {ok, gleam_stdlib:utf_codepoint_list_to_string([Codepoint])};

        {error, nil} ->
            {error, nil}
    end.

-file("src/glugify/internal/entities.gleam", 83).
?DOC(false).
-spec decode_numeric_entity(binary()) -> {ok, binary()} | {error, nil}.
decode_numeric_entity(Name) ->
    case Name of
        <<"#x"/utf8, Hex/binary>> ->
            case gleam@int:base_parse(Hex, 16) of
                {ok, Code} ->
                    codepoint_to_string(Code);

                {error, nil} ->
                    {error, nil}
            end;

        <<"#X"/utf8, Hex/binary>> ->
            case gleam@int:base_parse(Hex, 16) of
                {ok, Code} ->
                    codepoint_to_string(Code);

                {error, nil} ->
                    {error, nil}
            end;

        <<"#"/utf8, Decimal/binary>> ->
            case gleam_stdlib:parse_int(Decimal) of
                {ok, Code@1} ->
                    codepoint_to_string(Code@1);

                {error, nil} ->
                    {error, nil}
            end;

        _ ->
            {error, nil}
    end.

-file("src/glugify/internal/entities.gleam", 56).
?DOC(false).
-spec decode_entity(binary()) -> {ok, binary()} | {error, nil}.
decode_entity(Name) ->
    case Name of
        <<"amp"/utf8>> ->
            {ok, <<"&"/utf8>>};

        <<"lt"/utf8>> ->
            {ok, <<"<"/utf8>>};

        <<"gt"/utf8>> ->
            {ok, <<">"/utf8>>};

        <<"quot"/utf8>> ->
            {ok, <<"\""/utf8>>};

        <<"apos"/utf8>> ->
            {ok, <<"'"/utf8>>};

        <<"nbsp"/utf8>> ->
            {ok, <<"\x{00A0}"/utf8>>};

        <<"ndash"/utf8>> ->
            {ok, <<"–"/utf8>>};

        <<"mdash"/utf8>> ->
            {ok, <<"—"/utf8>>};

        <<"hellip"/utf8>> ->
            {ok, <<"…"/utf8>>};

        <<"lsquo"/utf8>> ->
            {ok, <<"‘"/utf8>>};

        <<"rsquo"/utf8>> ->
            {ok, <<"’"/utf8>>};

        <<"ldquo"/utf8>> ->
            {ok, <<"“"/utf8>>};

        <<"rdquo"/utf8>> ->
            {ok, <<"”"/utf8>>};

        <<"copy"/utf8>> ->
            {ok, <<"©"/utf8>>};

        <<"reg"/utf8>> ->
            {ok, <<"®"/utf8>>};

        <<"trade"/utf8>> ->
            {ok, <<"™"/utf8>>};

        <<"deg"/utf8>> ->
            {ok, <<"°"/utf8>>};

        <<"euro"/utf8>> ->
            {ok, <<"€"/utf8>>};

        <<"pound"/utf8>> ->
            {ok, <<"£"/utf8>>};

        <<"yen"/utf8>> ->
            {ok, <<"¥"/utf8>>};

        <<"cent"/utf8>> ->
            {ok, <<"¢"/utf8>>};

        _ ->
            decode_numeric_entity(Name)
    end.

-file("src/glugify/internal/entities.gleam", 36).
?DOC(false).
-spec take_entity(list(binary()), list(binary()), integer()) -> {ok,
        {binary(), list(binary())}} |
    {error, nil}.
take_entity(Graphemes, Acc, Length) ->
    case Graphemes of
        [<<";"/utf8>> | Rest] ->
            case Acc of
                [] ->
                    {error, nil};

                _ ->
                    {ok,
                        {gleam@string:join(lists:reverse(Acc), <<""/utf8>>),
                            Rest}}
            end;

        [Grapheme | Rest@1] ->
            case Length > 10 of
                true ->
                    {error, nil};

                false ->
                    take_entity(Rest@1, [Grapheme | Acc], Length + 1)
            end;

        [] ->
            {error, nil}
    end.

-file("src/glugify/internal/entities.gleam", 16).
?DOC(false).
-spec decode_graphemes(list(binary()), list(binary())) -> list(binary()).
decode_graphemes(Graphemes, Acc) ->
    case Graphemes of
        [] ->
            lists:reverse(Acc);

        [<<"&"/utf8>> | Rest] ->
            case take_entity(Rest, [], 0) of
                {ok, {Name, Remaining}} ->
                    case decode_entity(Name) of
                        {ok, Replacement} ->
                            decode_graphemes(Remaining, [Replacement | Acc]);

                        {error, nil} ->
                            decode_graphemes(Rest, [<<"&"/utf8>> | Acc])
                    end;

                {error, nil} ->
                    decode_graphemes(Rest, [<<"&"/utf8>> | Acc])
            end;

        [Grapheme | Rest@1] ->
            decode_graphemes(Rest@1, [Grapheme | Acc])
    end.

-file("src/glugify/internal/entities.gleam", 9).
?DOC(false).
-spec decode(binary()) -> binary().
decode(Text) ->
    _pipe = Text,
    _pipe@1 = gleam@string:to_graphemes(_pipe),
    _pipe@2 = decode_graphemes(_pipe@1, []),
    gleam@string:join(_pipe@2, <<""/utf8>>).