-module(kirala@bbmarkdown@parser).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([ret_string_trim/1, ret_string/1, parse/2, parse_all/1]).
-export_type([align/0, list_type/0, parse_res/0, token_res/0, url_data/0, token/0, src_pos/0]).

-type align() :: align_left | align_right | align_center.

-type list_type() :: std_list | ordered_list | checked_list | unchecked_list.

-type parse_res() :: {parse_res, binary(), bitstring()}.

-type token_res() :: {token_res, token(), bitstring()}.

-type url_data() :: {url_plain, binary()} | {url_foot_note, binary()}.

-type token() :: {line, list(token())} |
    {line_indent, integer(), list(token())} |
    {text, binary()} |
    {bold, token()} |
    {italic, token()} |
    {strike_through, token()} |
    {marked_text, token()} |
    {inserted_text, token()} |
    {note, binary(), token()} |
    {h, integer(), integer(), token()} |
    {code_block, binary(), binary(), binary()} |
    {code_span, binary()} |
    {code_line, binary()} |
    {block_quote, integer(), token()} |
    {list_item, list_type(), integer(), token()} |
    {url, url_data()} |
    {url_link, binary(), url_data()} |
    {img_link, binary(), binary(), url_data()} |
    {foot_note, binary(), token()} |
    {foot_note_url_def, binary(), binary(), binary()} |
    {table, list(token()), list(align()), list(list(token()))} |
    {definition_of, token()} |
    {definition, list(token())} |
    {definition_is, binary(), token()} |
    hr.

-type src_pos() :: {src_pos, integer(), integer()}.

-spec ret_string_trim(bitstring()) -> binary().
ret_string_trim(Bitstr) ->
    _assert_subject = gleam@bit_array:to_string(Bitstr),
    {ok, Str} = case _assert_subject of
        {ok, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"kirala/bbmarkdown/parser"/utf8>>,
                        function => <<"ret_string_trim"/utf8>>,
                        line => 67})
    end,
    _pipe = Str,
    gleam@string:trim(_pipe).

-spec ret_string(bitstring()) -> binary().
ret_string(Bitstr) ->
    kirala@bbmarkdown@sub_ffi:format(<<"~ts"/utf8>>, {Bitstr}).

-spec get_indent_nextchar(integer(), bitstring()) -> {integer(), binary()}.
get_indent_nextchar(Indent, Src) ->
    case Src of
        <<>> ->
            {0, <<""/utf8>>};

        <<" "/utf8, Rest/bitstring>> ->
            get_indent_nextchar(Indent + 1, Rest);

        <<"\t"/utf8, Rest/bitstring>> ->
            get_indent_nextchar(Indent + 1, Rest);

        <<"\n\r"/utf8, Rest@1/bitstring>> ->
            {0, <<""/utf8>>};

        <<"\r\n"/utf8, Rest@1/bitstring>> ->
            {0, <<""/utf8>>};

        <<"\n"/utf8, Rest@1/bitstring>> ->
            {0, <<""/utf8>>};

        <<"\r"/utf8, Rest@1/bitstring>> ->
            {0, <<""/utf8>>};

        <<Chr, Rest@2/bitstring>> ->
            {Indent,
                begin
                    _pipe = <<Chr>>,
                    ret_string(_pipe)
                end};

        Unhandable ->
            {0, <<"<unhandable>"/utf8>>}
    end.

-spec get_nextchar(bitstring()) -> binary().
get_nextchar(Src) ->
    case Src of
        <<>> ->
            <<""/utf8>>;

        <<" "/utf8, Rest/bitstring>> ->
            get_nextchar(Rest);

        <<"\t"/utf8, Rest/bitstring>> ->
            get_nextchar(Rest);

        <<"\n\r"/utf8, Rest/bitstring>> ->
            get_nextchar(Rest);

        <<"\r\n"/utf8, Rest/bitstring>> ->
            get_nextchar(Rest);

        <<"\n"/utf8, Rest/bitstring>> ->
            get_nextchar(Rest);

        <<"\r"/utf8, Rest/bitstring>> ->
            get_nextchar(Rest);

        <<Chr, Rest@1/bitstring>> ->
            _pipe = <<Chr>>,
            ret_string(_pipe);

        Unhandable ->
            <<"<unhandable>"/utf8>>
    end.

-spec get_line(bitstring(), bitstring()) -> parse_res().
get_line(Src, Acc) ->
    case Src of
        <<>> ->
            {parse_res, ret_string_trim(Acc), <<>>};

        <<"\n\r"/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<"\r\n"/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<"\n"/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<"\r"/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<Chr, Rest@1/bitstring>> ->
            get_line(Rest@1, <<Acc/bitstring, Chr>>);

        Unhandable ->
            {parse_res, ret_string_trim(Acc), <<>>}
    end.

-spec string_end_with(binary(), binary()) -> boolean().
string_end_with(Src, End_with) ->
    Slen = gleam@string:length(Src),
    Elen = gleam@string:length(End_with),
    Endstr = gleam@string:slice(Src, Slen - Elen, Elen),
    Endstr =:= End_with.

-spec string_skip_first(binary()) -> binary().
string_skip_first(Src) ->
    gleam@string:slice(Src, 1, gleam@string:length(Src) - 1).

-spec is_img_url_(binary(), list(binary())) -> boolean().
is_img_url_(Url, Exts) ->
    case Exts of
        [] ->
            false;

        [Ext | Rest] ->
            case string_end_with(Url, Ext) of
                true ->
                    true;

                _ ->
                    is_img_url_(Url, Rest)
            end
    end.

-spec is_img_url(binary()) -> boolean().
is_img_url(Url) ->
    is_img_url_(
        Url,
        [<<".jpg"/utf8>>, <<".jpeg"/utf8>>, <<".png"/utf8>>, <<".gif"/utf8>>]
    ).

-spec decode_url_(bitstring(), bitstring()) -> parse_res().
decode_url_(Src, Acc) ->
    case Src of
        <<>> ->
            {parse_res, ret_string_trim(Acc), <<>>};

        <<" "/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<"\n\r"/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<"\r\n"/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<"\n"/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<"\r"/utf8, Rest/bitstring>> ->
            {parse_res, ret_string_trim(Acc), Rest};

        <<Chr, Rest@1/bitstring>> ->
            decode_url_(Rest@1, <<Acc/bitstring, Chr>>);

        Unhandable ->
            {parse_res, ret_string_trim(Acc), <<>>}
    end.

-spec decode_url(bitstring()) -> token_res().
decode_url(Src) ->
    {parse_res, Url, Rest} = decode_url_(Src, <<>>),
    T = case is_img_url(Url) of
        true ->
            {img_link, <<""/utf8>>, <<""/utf8>>, {url_plain, Url}};

        _ ->
            {url, {url_plain, Url}}
    end,
    {token_res, T, Rest}.

-spec decode_codeblock_(bitstring(), bitstring()) -> parse_res().
decode_codeblock_(Src, Acc) ->
    case Src of
        <<"```"/utf8, Rest/bitstring>> ->
            {parse_res, _, Rest2} = get_line(Rest, <<>>),
            {parse_res, ret_string(Acc), Rest2};

        <<Chr, Rest@1/bitstring>> ->
            decode_codeblock_(Rest@1, <<Acc/bitstring, Chr>>);

        Unhandable ->
            {parse_res, ret_string(Acc), <<>>}
    end.

-spec decode_codeblock(bitstring()) -> token_res().
decode_codeblock(Src) ->
    {parse_res, Inf, Rest0} = get_line(Src, <<>>),
    {Syntax@2, Filename@1} = case gleam@string:split(Inf, <<":"/utf8>>) of
        [Syntax] ->
            {Syntax, <<""/utf8>>};

        [Syntax@1, Filename] ->
            {Syntax@1, Filename};

        _ ->
            {<<""/utf8>>, <<""/utf8>>}
    end,
    {parse_res, Code, Rest1} = decode_codeblock_(Rest0, <<>>),
    {token_res, {code_block, Syntax@2, Filename@1, Code}, Rest1}.

-spec get_until1_(bitstring(), bitstring(), integer()) -> parse_res().
get_until1_(Src, Acc, Nterm) ->
    case Src of
        <<>> ->
            {parse_res, <<""/utf8>>, <<>>};

        <<Str:8, Rest/bitstring>> when Str =:= Nterm ->
            {parse_res, ret_string(Acc), Rest};

        <<Chr, Rest@1/bitstring>> ->
            get_until1_(Rest@1, <<Acc/bitstring, Chr>>, Nterm);

        Unhandable ->
            {parse_res, ret_string(Acc), <<>>}
    end.

-spec get_until1(bitstring(), binary()) -> parse_res().
get_until1(Src, Terminator) ->
    _assert_subject = gleam_stdlib:identity(Terminator),
    <<Nterm:8>> = case _assert_subject of
        <<_:8>> -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"kirala/bbmarkdown/parser"/utf8>>,
                        function => <<"get_until1"/utf8>>,
                        line => 297})
    end,
    get_until1_(Src, <<>>, Nterm).

-spec get_until2_(bitstring(), bitstring(), integer()) -> parse_res().
get_until2_(Src, Acc, Nterm) ->
    case Src of
        <<>> ->
            {parse_res, <<""/utf8>>, <<>>};

        <<Str:16, Rest/bitstring>> when Str =:= Nterm ->
            {parse_res, ret_string(Acc), Rest};

        <<Chr, Rest@1/bitstring>> ->
            get_until2_(Rest@1, <<Acc/bitstring, Chr>>, Nterm);

        Unhandable ->
            {parse_res, ret_string(Acc), <<>>}
    end.

-spec get_until2(bitstring(), binary()) -> parse_res().
get_until2(Src, Terminator) ->
    _assert_subject = gleam_stdlib:identity(Terminator),
    <<Nterm:16>> = case _assert_subject of
        <<_:16>> -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"kirala/bbmarkdown/parser"/utf8>>,
                        function => <<"get_until2"/utf8>>,
                        line => 312})
    end,
    get_until2_(Src, <<>>, Nterm).

-spec get_until3_(bitstring(), bitstring(), integer()) -> parse_res().
get_until3_(Src, Acc, Nterm) ->
    case Src of
        <<>> ->
            {parse_res, <<""/utf8>>, <<>>};

        <<Str:24, Rest/bitstring>> when Str =:= Nterm ->
            {parse_res, ret_string(Acc), Rest};

        <<Chr, Rest@1/bitstring>> ->
            get_until3_(Rest@1, <<Acc/bitstring, Chr>>, Nterm);

        Unhandable ->
            {parse_res, ret_string(Acc), <<>>}
    end.

-spec get_until3(bitstring(), binary()) -> parse_res().
get_until3(Src, Terminator) ->
    _assert_subject = gleam_stdlib:identity(Terminator),
    <<Nterm:24>> = case _assert_subject of
        <<_:24>> -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"kirala/bbmarkdown/parser"/utf8>>,
                        function => <<"get_until3"/utf8>>,
                        line => 327})
    end,
    get_until3_(Src, <<>>, Nterm).

-spec get_until4_(bitstring(), bitstring(), integer()) -> parse_res().
get_until4_(Src, Acc, Nterm) ->
    case Src of
        <<>> ->
            {parse_res, <<""/utf8>>, <<>>};

        <<Str:32, Rest/bitstring>> when Str =:= Nterm ->
            {parse_res, ret_string(Acc), Rest};

        <<Chr, Rest@1/bitstring>> ->
            get_until4_(Rest@1, <<Acc/bitstring, Chr>>, Nterm);

        Unhandable ->
            {parse_res, ret_string(Acc), <<>>}
    end.

-spec get_until4(bitstring(), binary()) -> parse_res().
get_until4(Src, Terminator) ->
    _assert_subject = gleam_stdlib:identity(Terminator),
    <<Nterm:32>> = case _assert_subject of
        <<_:32>> -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"kirala/bbmarkdown/parser"/utf8>>,
                        function => <<"get_until4"/utf8>>,
                        line => 342})
    end,
    get_until4_(Src, <<>>, Nterm).

-spec decode_codespan(bitstring()) -> token_res().
decode_codespan(Src) ->
    {parse_res, Str, Rest} = get_until1(Src, <<"`"/utf8>>),
    {token_res, {code_span, Str}, Rest}.

-spec decode_hr(bitstring()) -> token_res().
decode_hr(Src) ->
    {parse_res, Str, Rest} = get_line(Src, <<>>),
    {token_res, hr, Rest}.

-spec decode_footnote_urldef(bitstring()) -> token_res().
decode_footnote_urldef(Src) ->
    {parse_res, Line, Rest} = get_line(Src, <<>>),
    {parse_res, Id, Lrest} = get_until2(
        begin
            _pipe = Line,
            gleam_stdlib:identity(_pipe)
        end,
        <<"]:"/utf8>>
    ),
    {parse_res, Xurl, Lrest2} = get_line(Lrest, <<>>),
    {Url@2, Alt@1} = case gleam@string:split(Xurl, <<" \""/utf8>>) of
        [Url] ->
            {Url, <<""/utf8>>};

        [Url@1, Alt] ->
            case gleam@string:split(Alt, <<"\""/utf8>>) of
                [Str] ->
                    {Url@1, Str};

                [Str@1 | _] ->
                    {Url@1, Str@1};

                _ ->
                    {Url@1, Alt}
            end;

        _ ->
            {Xurl, <<""/utf8>>}
    end,
    {token_res, {foot_note_url_def, Id, Url@2, Alt@1}, Rest}.

-spec decode_imglink(bitstring()) -> token_res().
decode_imglink(Src) ->
    {parse_res, Caption, Rest} = get_until1(Src, <<"]"/utf8>>),
    case get_nextchar(Rest) of
        <<"["/utf8>> ->
            {parse_res, _, Rest2} = get_until1(Rest, <<"["/utf8>>),
            {parse_res, Url, Rest3} = get_until1(Rest2, <<"]"/utf8>>),
            {token_res,
                {img_link, Caption, <<""/utf8>>, {url_foot_note, Url}},
                Rest3};

        _ ->
            {parse_res, _, Rest2@1} = get_until1(Rest, <<"("/utf8>>),
            {parse_res, Xurl, Rest3@1} = get_until1(Rest2@1, <<")"/utf8>>),
            {Url@3, Alt@1} = case gleam@string:split(Xurl, <<" \""/utf8>>) of
                [Url@1] ->
                    {Url@1, <<""/utf8>>};

                [Url@2, Alt] ->
                    case gleam@string:split(Alt, <<"\""/utf8>>) of
                        [Str] ->
                            {Url@2, Str};

                        _ ->
                            {Url@2, Alt}
                    end;

                _ ->
                    {Xurl, <<""/utf8>>}
            end,
            {token_res, {img_link, Caption, Alt@1, {url_plain, Url@3}}, Rest3@1}
    end.

-spec decode_footnote_link(bitstring()) -> token_res().
decode_footnote_link(Src) ->
    {parse_res, Id, Rest} = get_until1(Src, <<"]"/utf8>>),
    {token_res, {url, {url_foot_note, Id}}, Rest}.

-spec decode_urllink(bitstring()) -> token_res().
decode_urllink(Src) ->
    {parse_res, Sline, Rest} = get_line(Src, <<>>),
    Line = gleam_stdlib:identity(Sline),
    {parse_res, Urlid, Rest@1} = get_until2(Line, <<"]:"/utf8>>),
    {parse_res, Caption, Rest@2} = get_until1(Line, <<"]"/utf8>>),
    case {Urlid, Caption} of
        {<<""/utf8>>, _} ->
            case get_nextchar(Rest@2) of
                <<"["/utf8>> ->
                    {parse_res, _, Rest2} = get_until1(Rest@2, <<"["/utf8>>),
                    {parse_res, Url, Rest3} = get_until1(Rest2, <<"]"/utf8>>),
                    {token_res,
                        {url_link, Caption, {url_foot_note, Url}},
                        Rest3};

                _ ->
                    {parse_res, _, Rest2@1} = get_until1(Rest@2, <<"("/utf8>>),
                    {parse_res, Url@1, Rest3@1} = get_until1(
                        Rest2@1,
                        <<")"/utf8>>
                    ),
                    {token_res,
                        {url_link, Caption, {url_plain, Url@1}},
                        Rest3@1}
            end;

        _ ->
            decode_footnote_urldef(Src)
    end.

-spec decode_text(bitstring(), bitstring()) -> token_res().
decode_text(Src, Acc) ->
    case Src of
        <<>> ->
            {token_res, {text, ret_string(Acc)}, <<>>};

        <<"https://"/utf8, Rest/bitstring>> ->
            {token_res, {text, ret_string(Acc)}, Src};

        <<"http://"/utf8, Rest/bitstring>> ->
            {token_res, {text, ret_string(Acc)}, Src};

        <<"!["/utf8, Rest/bitstring>> ->
            {token_res, {text, ret_string(Acc)}, Src};

        <<"["/utf8, Rest/bitstring>> ->
            {token_res, {text, ret_string(Acc)}, Src};

        <<"`"/utf8, Rest/bitstring>> ->
            {token_res, {text, ret_string(Acc)}, Src};

        <<" **"/utf8, Rest/bitstring>> ->
            {token_res, {text, ret_string(Acc)}, Src};

        <<" *"/utf8, Rest/bitstring>> ->
            {token_res, {text, ret_string(Acc)}, Src};

        <<"~~ "/utf8, Rest/bitstring>> ->
            {token_res, {text, ret_string(Acc)}, Src};

        <<Chr, Rest@1/bitstring>> ->
            decode_text(Rest@1, <<Acc/bitstring, Chr>>);

        Unhandable ->
            {token_res, {text, ret_string(Acc)}, <<>>}
    end.

-spec list_remove_last(list(FKD)) -> list(FKD).
list_remove_last(L) ->
    _assert_subject = gleam@list:reverse(L),
    [_ | Tail] = case _assert_subject of
        [_ | _] -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"kirala/bbmarkdown/parser"/utf8>>,
                        function => <<"list_remove_last"/utf8>>,
                        line => 581})
    end,
    _pipe = Tail,
    gleam@list:reverse(_pipe).

-spec parse_(integer(), bitstring(), integer()) -> token_res().
parse_(Lineno, Src, Indent) ->
    case Src of
        <<"  "/utf8, Rest/bitstring>> ->
            parse_(Lineno, Rest, Indent + 1);

        <<"#######"/utf8, Rest@1/bitstring>> ->
            decode_h(Lineno, 7, Rest@1);

        <<"######"/utf8, Rest@2/bitstring>> ->
            decode_h(Lineno, 6, Rest@2);

        <<"#####"/utf8, Rest@3/bitstring>> ->
            decode_h(Lineno, 5, Rest@3);

        <<"####"/utf8, Rest@4/bitstring>> ->
            decode_h(Lineno, 4, Rest@4);

        <<"###"/utf8, Rest@5/bitstring>> ->
            decode_h(Lineno, 3, Rest@5);

        <<"##"/utf8, Rest@6/bitstring>> ->
            decode_h(Lineno, 2, Rest@6);

        <<"#"/utf8, Rest@7/bitstring>> ->
            decode_h(Lineno, 1, Rest@7);

        <<"```"/utf8, Rest@8/bitstring>> ->
            decode_codeblock(Rest@8);

        <<":::"/utf8, Rest@9/bitstring>> ->
            decode_note(Rest@9);

        <<"---"/utf8, Rest@10/bitstring>> ->
            decode_hr(Rest@10);

        <<"___"/utf8, Rest@11/bitstring>> ->
            decode_hr(Rest@11);

        <<"***"/utf8, Rest@12/bitstring>> ->
            decode_hr(Rest@12);

        <<"> > > "/utf8, Rest@13/bitstring>> ->
            decode_blockquote(3, Rest@13);

        <<">> "/utf8, Rest@14/bitstring>> ->
            decode_blockquote(2, Rest@14);

        <<"> "/utf8, Rest@15/bitstring>> ->
            decode_blockquote(1, Rest@15);

        <<"- [x] "/utf8, Rest@16/bitstring>> ->
            decode_checklist(Indent, true, Rest@16);

        <<"- [ ] "/utf8, Rest@17/bitstring>> ->
            decode_checklist(Indent, false, Rest@17);

        <<"[^"/utf8, Rest@18/bitstring>> ->
            decode_footnote(Rest@18);

        <<"*["/utf8, Rest@19/bitstring>> ->
            decode_footnote(Rest@19);

        <<Dch1, "."/utf8, Rest@20/bitstring>> when (16#30 =< Dch1) andalso (Dch1 =< 16#39) ->
            decode_ordered_list(Indent, Rest@20);

        <<Dch1@1, Dch2, "."/utf8, Rest@21/bitstring>> when (((16#30 =< Dch1@1) andalso (Dch1@1 =< 16#39)) andalso (16#30 =< Dch2)) andalso (Dch2 =< 16#39) ->
            decode_ordered_list(Indent, Rest@21);

        <<"* "/utf8, Rest@22/bitstring>> ->
            decode_list(Indent, Rest@22);

        <<"+ "/utf8, Rest@22/bitstring>> ->
            decode_list(Indent, Rest@22);

        <<"- "/utf8, Rest@22/bitstring>> ->
            decode_list(Indent, Rest@22);

        <<"|"/utf8, Rest@23/bitstring>> ->
            decode_table(Rest@23);

        <<": "/utf8, Rest@24/bitstring>> ->
            decode_definition(Indent, Rest@24);

        <<":"/utf8, Rest@25/bitstring>> ->
            decode_definition_is(Indent, Rest@25);

        _ ->
            decode_line2(Indent, Src)
    end.

-spec decode_note(bitstring()) -> token_res().
decode_note(Src) ->
    {parse_res, Title, Rest0} = get_line(Src, <<>>),
    {parse_res, Code, Rest1} = get_until3(Rest0, <<":::"/utf8>>),
    {token_res, T, _} = parse(
        0,
        begin
            _pipe = Code,
            gleam_stdlib:identity(_pipe)
        end
    ),
    {token_res, {note, Title, T}, Rest1}.

-spec parse(integer(), bitstring()) -> token_res().
parse(Lineno, Src) ->
    parse_(Lineno, Src, 1).

-spec parse_all_(integer(), bitstring(), list(token())) -> list(token()).
parse_all_(Lineno, Src, Acc) ->
    case erlang:byte_size(Src) of
        0 ->
            gleam@list:reverse(Acc);

        _ ->
            {token_res, T, Rest} = parse(Lineno, Src),
            parse_all_(Lineno + 1, Rest, [T | Acc])
    end.

-spec parse_all(binary()) -> list(token()).
parse_all(Src) ->
    parse_all_(1, gleam_stdlib:identity(Src), []).

-spec decode_bold(bitstring(), binary()) -> token_res().
decode_bold(Src, Terminator) ->
    {parse_res, Str, Rest} = get_until2(Src, Terminator),
    {token_res, T, _} = decode_line(
        begin
            _pipe = Str,
            gleam_stdlib:identity(_pipe)
        end
    ),
    {token_res, {bold, T}, Rest}.

-spec decode_line(bitstring()) -> token_res().
decode_line(Src) ->
    {parse_res, Linestr, Rest} = get_line(Src, <<>>),
    Line = begin
        _pipe = Linestr,
        gleam_stdlib:identity(_pipe)
    end,
    Ts = decode_line_(<<" "/utf8, Line/bitstring, " "/utf8>>, []),
    {token_res, {line, Ts}, Rest}.

-spec decode_line_(bitstring(), list(token())) -> list(token()).
decode_line_(Src, Acc) ->
    case Src of
        <<>> ->
            gleam@list:reverse(Acc);

        _ ->
            {token_res, T, Rest} = decode_line__(Src),
            decode_line_(Rest, [T | Acc])
    end.

-spec decode_line__(bitstring()) -> token_res().
decode_line__(Src) ->
    case Src of
        <<"`"/utf8, Rest/bitstring>> ->
            decode_codespan(Rest);

        <<" **"/utf8, Rest@1/bitstring>> ->
            decode_bold(Rest@1, <<"**"/utf8>>);

        <<" __"/utf8, Rest@2/bitstring>> ->
            decode_bold(Rest@2, <<"__"/utf8>>);

        <<" *"/utf8, Rest@3/bitstring>> ->
            decode_italic(Rest@3, <<"*"/utf8>>);

        <<" _"/utf8, Rest@4/bitstring>> ->
            decode_italic(Rest@4, <<"_"/utf8>>);

        <<" ~~"/utf8, Rest@5/bitstring>> ->
            decode_strikethrough(Rest@5);

        <<"https://"/utf8, Rest@6/bitstring>> ->
            decode_url(Src);

        <<"http://"/utf8, Rest@7/bitstring>> ->
            decode_url(Src);

        <<"!["/utf8, Rest@8/bitstring>> ->
            decode_imglink(Rest@8);

        <<"[^"/utf8, Rest@9/bitstring>> ->
            decode_footnote_link(Rest@9);

        <<"["/utf8, Rest@10/bitstring>> ->
            decode_urllink(Rest@10);

        <<" =="/utf8, Rest@11/bitstring>> ->
            decode_marked_text(Rest@11);

        <<" ++"/utf8, Rest@12/bitstring>> ->
            decode_inserted_text(Rest@12);

        _ ->
            decode_text(Src, <<>>)
    end.

-spec decode_definition_(integer(), bitstring(), list(token())) -> token_res().
decode_definition_(Nindent, Src, Acc) ->
    case get_indent_nextchar(0, Src) of
        {Next_indent, _} when Next_indent =/= 0 ->
            {token_res, T, Rest} = decode_line(Src),
            decode_definition_(Nindent, Rest, [T | Acc]);

        {Next_indent@1, _} ->
            {token_res, {definition, gleam@list:reverse(Acc)}, Src}
    end.

-spec decode_definition(integer(), bitstring()) -> token_res().
decode_definition(Indent, Src) ->
    {token_res, T, Rest} = decode_line(Src),
    decode_definition_(Indent, Rest, [T]).

-spec decode_definition_is(integer(), bitstring()) -> token_res().
decode_definition_is(Indent, Src) ->
    {parse_res, Str, Rest} = get_line(Src, <<>>),
    case gleam@string:split_once(Str, <<" "/utf8>>) of
        {ok, {Left, Right}} ->
            {token_res, T, _} = decode_line(
                begin
                    _pipe = Right,
                    _pipe@1 = gleam@string:trim(_pipe),
                    gleam_stdlib:identity(_pipe@1)
                end
            ),
            {token_res, {definition_is, gleam@string:trim(Left), T}, Rest};

        _ ->
            {token_res, T@1, _} = decode_line(
                begin
                    _pipe@2 = Str,
                    _pipe@3 = gleam@string:trim(_pipe@2),
                    gleam_stdlib:identity(_pipe@3)
                end
            ),
            {token_res, {definition, [T@1]}, Rest}
    end.

-spec decode_ordered_list(integer(), bitstring()) -> token_res().
decode_ordered_list(Indent, Src) ->
    {token_res, T, Rest} = decode_line(Src),
    {token_res, {list_item, ordered_list, Indent, T}, Rest}.

-spec decode_list(integer(), bitstring()) -> token_res().
decode_list(Indent, Src) ->
    {token_res, T, Rest} = decode_line(Src),
    {token_res, {list_item, std_list, Indent, T}, Rest}.

-spec decode_checklist(integer(), boolean(), bitstring()) -> token_res().
decode_checklist(Indent, Check, Src) ->
    {token_res, T, Rest} = decode_line(Src),
    case Check of
        true ->
            {token_res, {list_item, checked_list, Indent, T}, Rest};

        _ ->
            {token_res, {list_item, unchecked_list, Indent, T}, Rest}
    end.

-spec decode_blockquote(integer(), bitstring()) -> token_res().
decode_blockquote(Indent, Src) ->
    {token_res, T, Rest} = decode_line(Src),
    {token_res, {block_quote, Indent, T}, Rest}.

-spec decode_h(integer(), integer(), bitstring()) -> token_res().
decode_h(Id, N, Src) ->
    {token_res, T, Rest} = decode_line(Src),
    {token_res, {h, Id, N, T}, Rest}.

-spec decode_italic(bitstring(), binary()) -> token_res().
decode_italic(Src, Terminator) ->
    {parse_res, Str, Rest} = get_until1(Src, Terminator),
    {token_res, T, _} = decode_line(
        begin
            _pipe = Str,
            gleam_stdlib:identity(_pipe)
        end
    ),
    {token_res, {italic, T}, Rest}.

-spec decode_strikethrough(bitstring()) -> token_res().
decode_strikethrough(Src) ->
    {parse_res, Str, Rest} = get_until3(Src, <<"~~ "/utf8>>),
    {token_res, T, _} = decode_line(
        begin
            _pipe = Str,
            gleam_stdlib:identity(_pipe)
        end
    ),
    {token_res, {strike_through, T}, Rest}.

-spec decode_marked_text(bitstring()) -> token_res().
decode_marked_text(Src) ->
    {parse_res, Str, Rest} = get_until3(Src, <<"== "/utf8>>),
    {token_res, T, _} = decode_line(
        begin
            _pipe = Str,
            gleam_stdlib:identity(_pipe)
        end
    ),
    {token_res, {marked_text, T}, Rest}.

-spec decode_inserted_text(bitstring()) -> token_res().
decode_inserted_text(Src) ->
    {parse_res, Str, Rest} = get_until3(Src, <<"++ "/utf8>>),
    {token_res, T, _} = decode_line(
        begin
            _pipe = Str,
            gleam_stdlib:identity(_pipe)
        end
    ),
    {token_res, {inserted_text, T}, Rest}.

-spec decode_footnote(bitstring()) -> token_res().
decode_footnote(Src) ->
    {parse_res, Line, Rest} = get_line(Src, <<>>),
    {parse_res, Id, Lrest} = get_until2(
        begin
            _pipe = Line,
            gleam_stdlib:identity(_pipe)
        end,
        <<"]:"/utf8>>
    ),
    {token_res, T, _} = decode_line(Lrest),
    {token_res, {foot_note, Id, T}, Rest}.

-spec decode_line2(integer(), bitstring()) -> token_res().
decode_line2(Indent, Src) ->
    case Indent of
        I when I >= 2 ->
            {parse_res, Linestr, Rest} = get_line(Src, <<>>),
            {token_res, {code_line, Linestr}, Rest};

        _ ->
            {parse_res, Linestr@1, Rest@1} = get_line(Src, <<>>),
            Line = begin
                _pipe = Linestr@1,
                gleam_stdlib:identity(_pipe)
            end,
            Ts = decode_line_(<<" "/utf8, Line/bitstring, " "/utf8>>, []),
            case get_nextchar(Rest@1) of
                <<":"/utf8>> ->
                    {token_res, {definition_of, {line, Ts}}, Rest@1};

                _ ->
                    {token_res, {line_indent, Indent, Ts}, Rest@1}
            end
    end.

-spec decode_table_row(bitstring()) -> {list(token()), bitstring()}.
decode_table_row(Src) ->
    {parse_res, Header, Rest} = get_line(Src, <<>>),
    Splitted = begin
        _pipe = gleam@string:split(Header, <<"|"/utf8>>),
        list_remove_last(_pipe)
    end,
    Tlist = gleam@list:map(
        Splitted,
        fun(Str) ->
            {token_res, T, _} = decode_line(
                begin
                    _pipe@1 = Str,
                    gleam_stdlib:identity(_pipe@1)
                end
            ),
            T
        end
    ),
    {Tlist, Rest}.

-spec decode_table_items(bitstring(), list(list(token()))) -> {list(list(token())),
    bitstring()}.
decode_table_items(Src, Acc) ->
    case Src of
        <<"|"/utf8, Rest/bitstring>> ->
            {Trow, Rest2} = decode_table_row(Rest),
            decode_table_items(Rest2, [Trow | Acc]);

        _ ->
            {gleam@list:reverse(Acc), Src}
    end.

-spec decode_table(bitstring()) -> token_res().
decode_table(Src) ->
    {Header, Rest} = decode_table_row(Src),
    {parse_res, Align_line, Rest2} = get_line(Rest, <<>>),
    Splitted_align = begin
        _pipe = gleam@string:split(Align_line, <<"|"/utf8>>),
        list_remove_last(_pipe)
    end,
    Aligns = gleam@list:map(
        Splitted_align,
        fun(A) -> case string_end_with(A, <<"-:"/utf8>>) of
                true ->
                    align_right;

                _ ->
                    align_left
            end end
    ),
    {Lines, Rest3} = decode_table_items(Rest2, []),
    {token_res, {table, Header, Aligns, Lines}, Rest3}.