-module(derived).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).
-define(FILEPATH, "src/derived.gleam").
-export([parse/1, generate/2]).

-file("src/derived.gleam", 7).
-spec parse(binary()) -> list(derived@ast:derived_type()).
parse(Input) ->
    derived@ast:parse(Input).

-file("src/derived.gleam", 78).
-spec insert_after_type(binary(), derived@ast:derived_type(), binary()) -> binary().
insert_after_type(Source, Derived_type, Content) ->
    {_, End} = erlang:element(2, Derived_type),
    Before = gleam@string:slice(Source, 0, End + 1),
    After = gleam@string:slice(
        Source,
        End + 1,
        (string:length(Source) - End) - 1
    ),
    <<<<<<Before/binary, "\n\n"/utf8>>/binary, Content/binary>>/binary,
        After/binary>>.

-file("src/derived.gleam", 90).
-spec start_marker(binary()) -> binary().
start_marker(Derived_name) ->
    <<<<"// ---- BEGIN DERIVED "/utf8, Derived_name/binary>>/binary,
        " DO NOT MODIFY ---- //"/utf8>>.

-file("src/derived.gleam", 94).
-spec end_marker(binary()) -> binary().
end_marker(Derived_name) ->
    <<<<"// ---- END DERIVED "/utf8, Derived_name/binary>>/binary, " //"/utf8>>.

-file("src/derived.gleam", 54).
-spec find_and_replace_markers(binary(), binary(), binary()) -> {ok, binary()} |
    {error, nil}.
find_and_replace_markers(Source, Derived_name, New_content) ->
    Pattern = <<<<(start_marker(Derived_name))/binary, "[\\s\\S]*?"/utf8>>/binary,
        (end_marker(Derived_name))/binary>>,
    case gleam@regexp:compile(Pattern, {options, false, true}) of
        {ok, Regex} ->
            case gleam_regexp_ffi:replace(Regex, Source, New_content) of
                Result when Result =/= Source ->
                    {ok, Result};

                _ ->
                    {error, nil}
            end;

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

-file("src/derived.gleam", 35).
-spec create_derived_content(
    binary(),
    binary(),
    binary(),
    derived@ast:derived_type()
) -> binary().
create_derived_content(Generated_code, Derived_name, Source, Derived_type) ->
    New_content = <<<<<<<<(start_marker(Derived_name))/binary, "\n"/utf8>>/binary,
                Generated_code/binary>>/binary,
            "\n"/utf8>>/binary,
        (end_marker(Derived_name))/binary>>,
    _pipe = find_and_replace_markers(Source, Derived_name, New_content),
    gleam@result:lazy_unwrap(
        _pipe,
        fun() -> insert_after_type(Source, Derived_type, New_content) end
    ).

-file("src/derived.gleam", 11).
-spec generate(
    binary(),
    fun((derived@ast:derived_type()) -> {ok, binary()} | {error, nil})
) -> binary().
generate(Input, Callback) ->
    Derived_types = begin
        _pipe = Input,
        _pipe@1 = parse(_pipe),
        lists:reverse(_pipe@1)
    end,
    gleam@list:fold(
        Derived_types,
        Input,
        fun(Source_after_types, Derived_type) ->
            gleam@list:fold(
                begin
                    _pipe@2 = erlang:element(8, Derived_type),
                    lists:reverse(_pipe@2)
                end,
                Source_after_types,
                fun(Source_after_derivations, Derived_name) ->
                    _pipe@3 = Derived_type,
                    _pipe@4 = Callback(_pipe@3),
                    _pipe@5 = gleam@result:map(
                        _pipe@4,
                        fun(_capture) ->
                            create_derived_content(
                                _capture,
                                Derived_name,
                                Source_after_derivations,
                                Derived_type
                            )
                        end
                    ),
                    gleam@result:unwrap(_pipe@5, Source_after_derivations)
                end
            )
        end
    ).