-module(postgleam@codec@path).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/postgleam/codec/path.gleam").
-export([encode/1, decode/1, matcher/0]).

-file("src/postgleam/codec/path.gleam", 41).
-spec encode_points(list({float(), float()}), bitstring()) -> bitstring().
encode_points(Points, Acc) ->
    case Points of
        [] ->
            Acc;

        [{X, Y} | Rest] ->
            encode_points(
                Rest,
                <<Acc/bitstring, X:64/float-big, Y:64/float-big>>
            )
    end.

-file("src/postgleam/codec/path.gleam", 25).
-spec encode(postgleam@value:value()) -> {ok, bitstring()} | {error, binary()}.
encode(Val) ->
    case Val of
        {path, Closed, Points} ->
            Closed_byte = case Closed of
                true ->
                    1;

                false ->
                    0
            end,
            Npts = erlang:length(Points),
            Header = <<Closed_byte, Npts:32/big>>,
            Body = encode_points(Points, <<>>),
            {ok, <<Header/bitstring, Body/bitstring>>};

        _ ->
            {error, <<"path codec: expected Path value"/utf8>>}
    end.

-file("src/postgleam/codec/path.gleam", 65).
-spec decode_points(bitstring(), integer(), list({float(), float()})) -> {ok,
        list({float(), float()})} |
    {error, binary()}.
decode_points(Data, Count, Acc) ->
    case Count of
        0 ->
            {ok, lists:reverse(Acc)};

        _ ->
            case Data of
                <<X:64/float-big, Y:64/float-big, Rest/bitstring>> ->
                    decode_points(Rest, Count - 1, [{X, Y} | Acc]);

                _ ->
                    {error, <<"path codec: insufficient point data"/utf8>>}
            end
    end.

-file("src/postgleam/codec/path.gleam", 49).
-spec decode(bitstring()) -> {ok, postgleam@value:value()} | {error, binary()}.
decode(Data) ->
    case Data of
        <<Closed_byte, Npts:32/big, Rest/bitstring>> ->
            Closed = case Closed_byte of
                1 ->
                    true;

                _ ->
                    false
            end,
            case decode_points(Rest, Npts, []) of
                {ok, Points} ->
                    {ok, {path, Closed, Points}};

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

        _ ->
            {error, <<"path codec: invalid header"/utf8>>}
    end.

-file("src/postgleam/codec/path.gleam", 21).
-spec build(integer()) -> postgleam@codec:codec().
build(Type_oid) ->
    {codec, <<"path"/utf8>>, Type_oid, binary, fun encode/1, fun decode/1}.

-file("src/postgleam/codec/path.gleam", 11).
-spec matcher() -> postgleam@codec:codec_matcher().
matcher() ->
    {codec_matcher, <<"path"/utf8>>, [602], none, binary, fun build/1}.