-module(pathern@internal@parser).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([parse/2]).

-file("/home/ram/code/gleam/pathern/src/pathern/internal/parser.gleam", 58).
-spec parse_param(binary(), binary()) -> binary().
parse_param(Path, Accum) ->
    case gleam@string:first(Path) of
        {ok, Grapheme} ->
            case Grapheme of
                <<"/"/utf8>> ->
                    Accum;

                _ ->
                    parse_param(
                        gleam@string:drop_start(Path, 1),
                        <<Accum/binary, Grapheme/binary>>
                    )
            end;

        {error, _} ->
            Accum
    end.

-file("/home/ram/code/gleam/pathern/src/pathern/internal/parser.gleam", 34).
-spec parse_token(
    pathern@internal@lexer:token(),
    binary(),
    gleam@dict:dict(binary(), binary())
) -> {ok, {gleam@dict:dict(binary(), binary()), binary()}} | {error, nil}.
parse_token(Token, Path, Params) ->
    case erlang:element(2, Token) of
        slash ->
            case gleam@string:slice(Path, 0, erlang:element(4, Token)) of
                <<""/utf8>> ->
                    {error, nil};

                Val ->
                    case Val =:= erlang:element(5, Token) of
                        true ->
                            {ok,
                                {Params,
                                    gleam@string:drop_start(
                                        Path,
                                        erlang:element(4, Token)
                                    )}};

                        false ->
                            {error, nil}
                    end
            end;

        literal ->
            case gleam@string:slice(Path, 0, erlang:element(4, Token)) of
                <<""/utf8>> ->
                    {error, nil};

                Val ->
                    case Val =:= erlang:element(5, Token) of
                        true ->
                            {ok,
                                {Params,
                                    gleam@string:drop_start(
                                        Path,
                                        erlang:element(4, Token)
                                    )}};

                        false ->
                            {error, nil}
                    end
            end;

        param ->
            Param = parse_param(Path, <<""/utf8>>),
            Params@1 = gleam@dict:insert(
                Params,
                erlang:element(5, Token),
                Param
            ),
            {ok,
                {Params@1, gleam@string:drop_start(Path, string:length(Param))}};

        _ ->
            {error, nil}
    end.

-file("/home/ram/code/gleam/pathern/src/pathern/internal/parser.gleam", 13).
-spec parse_tokens(
    list(pathern@internal@lexer:token()),
    binary(),
    gleam@dict:dict(binary(), binary())
) -> {ok, gleam@dict:dict(binary(), binary())} | {error, nil}.
parse_tokens(Tokens, Path, Params) ->
    case Tokens of
        [Head | Rest] ->
            case parse_token(Head, Path, Params) of
                {ok, {Params@1, New_path}} ->
                    parse_tokens(Rest, New_path, Params@1);

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

        [] ->
            case gleam@string:is_empty(Path) of
                true ->
                    {ok, Params};

                false ->
                    {error, nil}
            end
    end.

-file("/home/ram/code/gleam/pathern/src/pathern/internal/parser.gleam", 5).
-spec parse(binary(), list(pathern@internal@lexer:token())) -> {ok,
        gleam@dict:dict(binary(), binary())} |
    {error, nil}.
parse(Path, Tokens) ->
    Params = maps:new(),
    parse_tokens(Tokens, Path, Params).