-module(checkmark@internal@parser).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/checkmark/internal/parser.gleam").
-export([parse/1]).
-export_type([section/0, fence/0, section_builder/0]).

-type section() :: {other, integer(), binary()} |
    {fenced_code, integer(), binary(), fence(), gleam@option:option(fence())}.

-type fence() :: {fence, binary(), binary(), integer()}.

-type section_builder() :: {other_builder, integer(), list(binary())} |
    {fenced_code_builder, integer(), list(binary()), fence()}.

-file("src/checkmark/internal/parser.gleam", 131).
-spec should_close(fence(), fence()) -> boolean().
should_close(Start, End) ->
    gleam_stdlib:string_starts_with(
        erlang:element(2, End),
        erlang:element(2, Start)
    ).

-file("src/checkmark/internal/parser.gleam", 142).
-spec remove_indent_up_to(binary(), integer()) -> binary().
remove_indent_up_to(String, Indent) ->
    case {Indent, String} of
        {0, _} ->
            String;

        {_, <<" "/utf8, Rest/binary>>} ->
            remove_indent_up_to(Rest, Indent - 1);

        {_, _} ->
            String
    end.

-file("src/checkmark/internal/parser.gleam", 135).
-spec parts_to_string(list(binary()), integer()) -> binary().
parts_to_string(Parts, Indent) ->
    _pipe = Parts,
    _pipe@1 = gleam@list:map(
        _pipe,
        fun(_capture) -> remove_indent_up_to(_capture, Indent) end
    ),
    _pipe@2 = lists:reverse(_pipe@1),
    gleam@string:join(_pipe@2, <<""/utf8>>).

-file("src/checkmark/internal/parser.gleam", 168).
-spec build_fence(binary(), integer(), integer(), binary(), binary()) -> fence().
build_fence(Character, Indent, Delimiters, Rest, Ending) ->
    case gleam_stdlib:string_pop_grapheme(Rest) of
        {ok, {First, Rest@1}} when First =:= Character ->
            build_fence(Character, Indent, Delimiters + 1, Rest@1, Ending);

        _ ->
            {fence,
                gleam@string:repeat(Character, Delimiters),
                <<Rest/binary, Ending/binary>>,
                Indent}
    end.

-file("src/checkmark/internal/parser.gleam", 150).
-spec parse_fence(binary(), binary()) -> gleam@option:option(fence()).
parse_fence(Line, Ending) ->
    case Line of
        <<"```"/utf8, Rest/binary>> ->
            {some, build_fence(<<"`"/utf8>>, 0, 3, Rest, Ending)};

        <<" ```"/utf8, Rest@1/binary>> ->
            {some, build_fence(<<"`"/utf8>>, 1, 3, Rest@1, Ending)};

        <<"  ```"/utf8, Rest@2/binary>> ->
            {some, build_fence(<<"`"/utf8>>, 2, 3, Rest@2, Ending)};

        <<"   ```"/utf8, Rest@3/binary>> ->
            {some, build_fence(<<"`"/utf8>>, 3, 3, Rest@3, Ending)};

        <<"~~~"/utf8, Rest@4/binary>> ->
            {some, build_fence(<<"~"/utf8>>, 0, 3, Rest@4, Ending)};

        <<" ~~~"/utf8, Rest@5/binary>> ->
            {some, build_fence(<<"~"/utf8>>, 1, 3, Rest@5, Ending)};

        <<"  ~~~"/utf8, Rest@6/binary>> ->
            {some, build_fence(<<"~"/utf8>>, 2, 3, Rest@6, Ending)};

        <<"   ~~~"/utf8, Rest@7/binary>> ->
            {some, build_fence(<<"~"/utf8>>, 3, 3, Rest@7, Ending)};

        _ ->
            none
    end.

-file("src/checkmark/internal/parser.gleam", 34).
-spec parse_lines(
    splitter:splitter(),
    integer(),
    list(section()),
    gleam@option:option(section_builder()),
    binary(),
    binary(),
    binary()
) -> list(section()).
parse_lines(Splitter, Line, Sections, Current_section, Content, Ending, Rest) ->
    {Sections@1, Current_section@2} = case parse_fence(Content, Ending) of
        none ->
            Current_section@1 = case Current_section of
                none ->
                    {other_builder, Line, [Ending, Content]};

                {some, Builder} ->
                    Parts = [Ending, Content | erlang:element(3, Builder)],
                    case Builder of
                        {fenced_code_builder, Line@1, _, Start_fence} ->
                            {fenced_code_builder, Line@1, Parts, Start_fence};

                        {other_builder, Line@2, _} ->
                            {other_builder, Line@2, Parts}
                    end
            end,
            {Sections, {some, Current_section@1}};

        {some, Fence} ->
            case Current_section of
                none ->
                    {Sections, {some, {fenced_code_builder, Line, [], Fence}}};

                {some, {other_builder, Prev_line, Parts@1}} ->
                    {[{other, Prev_line, parts_to_string(Parts@1, 0)} |
                            Sections],
                        {some, {fenced_code_builder, Line, [], Fence}}};

                {some,
                    {fenced_code_builder, Start_line, Parts@2, Start_fence@1}} ->
                    case should_close(Start_fence@1, Fence) of
                        true ->
                            {[{fenced_code,
                                        Start_line,
                                        parts_to_string(
                                            Parts@2,
                                            erlang:element(4, Start_fence@1)
                                        ),
                                        Start_fence@1,
                                        {some, Fence}} |
                                    Sections],
                                none};

                        false ->
                            {Sections,
                                {some,
                                    {fenced_code_builder,
                                        Start_line,
                                        [Ending, Content | Parts@2],
                                        Start_fence@1}}}
                    end
            end
    end,
    case Rest of
        <<""/utf8>> ->
            Sections@2 = case Current_section@2 of
                none ->
                    Sections@1;

                {some, Builder@1} ->
                    case Builder@1 of
                        {fenced_code_builder,
                            Start_line@1,
                            Parts@3,
                            Start_fence@2} ->
                            [{fenced_code,
                                    Start_line@1,
                                    parts_to_string(
                                        Parts@3,
                                        erlang:element(4, Start_fence@2)
                                    ),
                                    Start_fence@2,
                                    none} |
                                Sections@1];

                        {other_builder, Start_line@2, Parts@4} ->
                            [{other, Start_line@2, parts_to_string(Parts@4, 0)} |
                                Sections@1]
                    end
            end,
            lists:reverse(Sections@2);

        Rest@1 ->
            {Content@1, Ending@1, Rest@2} = splitter_ffi:split(Splitter, Rest@1),
            parse_lines(
                Splitter,
                Line + 1,
                Sections@1,
                Current_section@2,
                Content@1,
                Ending@1,
                Rest@2
            )
    end.

-file("src/checkmark/internal/parser.gleam", 26).
-spec parse(binary()) -> list(section()).
parse(Content) ->
    gleam@bool:guard(
        Content =:= <<""/utf8>>,
        [],
        fun() ->
            Line_ends = splitter:new([<<"\n"/utf8>>, <<"\r\n"/utf8>>]),
            {Line, Ending, Rest} = splitter_ffi:split(Line_ends, Content),
            parse_lines(Line_ends, 1, [], none, Line, Ending, Rest)
        end
    ).