-module(glrss_parser@rss@date).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([dow_from/1, dow_to_short/1, empty/0, parse/1]).
-export_type([rss_date/0, day_of_week/0, date/0, time/0, hour/0, zone/0]).

-type rss_date() :: {rss_date,
        gleam@option:option(day_of_week()),
        integer(),
        integer(),
        integer(),
        integer(),
        integer(),
        integer(),
        integer()}.

-type day_of_week() :: monday |
    tuesday |
    wednesday |
    thursday |
    friday |
    saturday |
    sunday.

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

-type time() :: {time, hour(), zone()}.

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

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

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 30).
-spec dow_from(binary()) -> {ok, day_of_week()} | {error, nil}.
dow_from(Str) ->
    case Str of
        <<"Mon"/utf8>> ->
            {ok, monday};

        <<"Monday"/utf8>> ->
            {ok, monday};

        <<"Tue"/utf8>> ->
            {ok, tuesday};

        <<"Tuesday"/utf8>> ->
            {ok, tuesday};

        <<"Wed"/utf8>> ->
            {ok, wednesday};

        <<"Wednesday"/utf8>> ->
            {ok, wednesday};

        <<"Thu"/utf8>> ->
            {ok, thursday};

        <<"Thursday"/utf8>> ->
            {ok, thursday};

        <<"Fri"/utf8>> ->
            {ok, friday};

        <<"Friday"/utf8>> ->
            {ok, friday};

        <<"Sat"/utf8>> ->
            {ok, saturday};

        <<"Saturday"/utf8>> ->
            {ok, saturday};

        <<"Sun"/utf8>> ->
            {ok, sunday};

        <<"Sunday"/utf8>> ->
            {ok, sunday};

        _ ->
            {error, nil}
    end.

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 43).
-spec dow_to_short(day_of_week()) -> binary().
dow_to_short(Dow) ->
    case Dow of
        monday ->
            <<"Mon"/utf8>>;

        tuesday ->
            <<"Tue"/utf8>>;

        wednesday ->
            <<"Wed"/utf8>>;

        thursday ->
            <<"Thu"/utf8>>;

        friday ->
            <<"Fri"/utf8>>;

        saturday ->
            <<"Sat"/utf8>>;

        sunday ->
            <<"Sun"/utf8>>
    end.

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 55).
-spec empty() -> rss_date().
empty() ->
    {rss_date, none, 0, 0, 0, 0, 0, 0, 0}.

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 96).
-spec day() -> party:parser(gleam@option:option(day_of_week()), any()).
day() ->
    party:do(
        party:many1_concat(party:letter()),
        fun(Str) ->
            party:do(
                party:seq(party:char(<<","/utf8>>), party:whitespace1()),
                fun(_) -> _pipe = Str,
                    _pipe@1 = dow_from(_pipe),
                    _pipe@2 = gleam@option:from_result(_pipe@1),
                    party:return(_pipe@2) end
            )
        end
    ).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 123).
-spec month3_to_int(binary()) -> {ok, integer()} | {error, nil}.
month3_to_int(Month) ->
    case Month of
        <<"Jan"/utf8>> ->
            {ok, 1};

        <<"Feb"/utf8>> ->
            {ok, 2};

        <<"Mar"/utf8>> ->
            {ok, 3};

        <<"Apr"/utf8>> ->
            {ok, 4};

        <<"May"/utf8>> ->
            {ok, 5};

        <<"Jun"/utf8>> ->
            {ok, 6};

        <<"Jul"/utf8>> ->
            {ok, 7};

        <<"Aug"/utf8>> ->
            {ok, 8};

        <<"Sep"/utf8>> ->
            {ok, 9};

        <<"Oct"/utf8>> ->
            {ok, 10};

        <<"Nov"/utf8>> ->
            {ok, 11};

        <<"Dec"/utf8>> ->
            {ok, 12};

        _ ->
            {error, nil}
    end.

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 185).
-spec zone_int() -> party:parser(zone(), any()).
zone_int() ->
    Digit = party:digit(),
    party:do(
        party:either(party:char(<<"+"/utf8>>), party:char(<<"-"/utf8>>)),
        fun(Sign) ->
            party:do(
                Digit,
                fun(Hour_tens) ->
                    party:do(
                        Digit,
                        fun(Hour_ones) ->
                            party:do(
                                Digit,
                                fun(Min_tens) ->
                                    party:do(
                                        Digit,
                                        fun(Min_ones) ->
                                            glrss_parser@util:try_unwrap(
                                                gleam@int:parse(
                                                    <<Hour_tens/binary,
                                                        Hour_ones/binary>>
                                                ),
                                                party:fail(),
                                                fun(Hour) ->
                                                    gleam@result:'try'(
                                                        gleam@int:parse(
                                                            <<Min_tens/binary,
                                                                Min_ones/binary>>
                                                        ),
                                                        fun(Min) ->
                                                            Sign@1 = case Sign of
                                                                <<"+"/utf8>> ->
                                                                    1;

                                                                <<"-"/utf8>> ->
                                                                    -1;

                                                                _ ->
                                                                    erlang:error(
                                                                        #{gleam_error => panic,
                                                                            message => <<"unreachable"/utf8>>,
                                                                            module => <<"glrss_parser/rss/date"/utf8>>,
                                                                            function => <<"zone_int"/utf8>>,
                                                                            line => 197}
                                                                    )
                                                            end,
                                                            {ok,
                                                                party:return(
                                                                    {zone,
                                                                        Sign@1 * ((Hour
                                                                        * 60)
                                                                        + Min)}
                                                                )}
                                                        end
                                                    )
                                                end
                                            )
                                        end
                                    )
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 206).
-spec zone_str_to_hour(binary()) -> {ok, integer()} | {error, nil}.
zone_str_to_hour(Zone) ->
    case Zone of
        <<"Z"/utf8>> ->
            {ok, 0};

        <<"UT"/utf8>> ->
            {ok, 0};

        <<"GMT"/utf8>> ->
            {ok, 0};

        <<"A"/utf8>> ->
            {ok, -1};

        <<"B"/utf8>> ->
            {ok, -2};

        <<"C"/utf8>> ->
            {ok, -3};

        <<"D"/utf8>> ->
            {ok, -4};

        <<"EDT"/utf8>> ->
            {ok, -4};

        <<"E"/utf8>> ->
            {ok, -5};

        <<"EST"/utf8>> ->
            {ok, -5};

        <<"CDT"/utf8>> ->
            {ok, -5};

        <<"F"/utf8>> ->
            {ok, -6};

        <<"CST"/utf8>> ->
            {ok, -6};

        <<"MDT"/utf8>> ->
            {ok, -6};

        <<"G"/utf8>> ->
            {ok, -7};

        <<"MST"/utf8>> ->
            {ok, -7};

        <<"PDT"/utf8>> ->
            {ok, -7};

        <<"H"/utf8>> ->
            {ok, -8};

        <<"PST"/utf8>> ->
            {ok, -8};

        <<"I"/utf8>> ->
            {ok, -9};

        <<"K"/utf8>> ->
            {ok, -10};

        <<"L"/utf8>> ->
            {ok, -11};

        <<"M"/utf8>> ->
            {ok, -12};

        <<"N"/utf8>> ->
            {ok, 1};

        <<"O"/utf8>> ->
            {ok, 2};

        <<"P"/utf8>> ->
            {ok, 3};

        <<"Q"/utf8>> ->
            {ok, 4};

        <<"R"/utf8>> ->
            {ok, 5};

        <<"S"/utf8>> ->
            {ok, 6};

        <<"T"/utf8>> ->
            {ok, 7};

        <<"U"/utf8>> ->
            {ok, 8};

        <<"V"/utf8>> ->
            {ok, 9};

        <<"W"/utf8>> ->
            {ok, 10};

        <<"X"/utf8>> ->
            {ok, 11};

        <<"Y"/utf8>> ->
            {ok, 12};

        _ ->
            {error, nil}
    end.

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 173).
-spec zone_str() -> party:parser(zone(), any()).
zone_str() ->
    Str_or_empty = fun(Res) -> gleam@result:unwrap(Res, <<""/utf8>>) end,
    party:do(
        party:letter(),
        fun(C1) ->
            party:do(
                begin
                    _pipe = party:perhaps(party:letter()),
                    party:map(_pipe, Str_or_empty)
                end,
                fun(C2) ->
                    party:do(
                        begin
                            _pipe@1 = party:perhaps(party:letter()),
                            party:map(_pipe@1, Str_or_empty)
                        end,
                        fun(C3) ->
                            Zone = <<<<C1/binary, C2/binary>>/binary,
                                C3/binary>>,
                            case zone_str_to_hour(Zone) of
                                {ok, Hour} ->
                                    party:return({zone, Hour * 60});

                                {error, _} ->
                                    party:fail()
                            end
                        end
                    )
                end
            )
        end
    ).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 169).
-spec zone() -> party:parser(zone(), any()).
zone() ->
    party:either(zone_str(), zone_int()).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 237).
-spec p_integer() -> party:parser({ok, integer()} | {error, nil}, any()).
p_integer() ->
    _pipe = party:digits(),
    party:map(_pipe, fun gleam@int:parse/1).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 152).
-spec hour() -> party:parser(hour(), any()).
hour() ->
    Colon = party:char(<<":"/utf8>>),
    party:do(
        p_integer(),
        fun(Hour) ->
            party:do(
                Colon,
                fun(_) ->
                    party:do(
                        p_integer(),
                        fun(Minute) ->
                            party:do(
                                party:perhaps(party:seq(Colon, p_integer())),
                                fun(Second) ->
                                    Second@1 = begin
                                        _pipe = Second,
                                        _pipe@1 = gleam@result:flatten(_pipe),
                                        gleam@result:unwrap(_pipe@1, 0)
                                    end,
                                    case {Hour, Minute} of
                                        {{ok, Hour@1}, {ok, Minute@1}} ->
                                            party:return(
                                                {hour,
                                                    Hour@1,
                                                    Minute@1,
                                                    Second@1}
                                            );

                                        {_, _} ->
                                            party:fail()
                                    end
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 141).
-spec time() -> party:parser(time(), any()).
time() ->
    party:do(
        hour(),
        fun(Hour) ->
            party:do(
                party:whitespace1(),
                fun(_) ->
                    party:do(
                        zone(),
                        fun(Zone) -> party:return({time, Hour, Zone}) end
                    )
                end
            )
        end
    ).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 241).
-spec p_letters() -> party:parser(binary(), any()).
p_letters() ->
    party:many1_concat(party:letter()).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 106).
-spec date() -> party:parser(date(), any()).
date() ->
    party:do(
        p_integer(),
        fun(Day) ->
            party:do(
                party:whitespace1(),
                fun(_) ->
                    party:do(
                        begin
                            _pipe = p_letters(),
                            party:map(_pipe, fun month3_to_int/1)
                        end,
                        fun(Month) ->
                            party:do(
                                party:whitespace1(),
                                fun(_) ->
                                    party:do(
                                        p_integer(),
                                        fun(Year) -> case {Day, Month, Year} of
                                                {{ok, Day@1},
                                                    {ok, Month@1},
                                                    {ok, Year@1}} ->
                                                    party:return(
                                                        {date,
                                                            Day@1,
                                                            Month@1,
                                                            Year@1}
                                                    );

                                                {_, _, _} ->
                                                    party:fail()
                                            end end
                                    )
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 68).
-spec date_time() -> party:parser(rss_date(), any()).
date_time() ->
    party:do(
        party:perhaps(day()),
        fun(Dow) ->
            party:do(
                date(),
                fun(_use0) ->
                    {date, Day, Month, Year} = _use0,
                    party:do(
                        party:whitespace1(),
                        fun(_) ->
                            party:do(
                                time(),
                                fun(_use0@1) ->
                                    {time, T_hour, {zone, Offset_minutes}} = _use0@1,
                                    {hour, Hour, Minute, Second} = T_hour,
                                    Day_of_week = begin
                                        _pipe = Dow,
                                        _pipe@1 = gleam@option:from_result(
                                            _pipe
                                        ),
                                        gleam@option:flatten(_pipe@1)
                                    end,
                                    party:return(
                                        {rss_date,
                                            Day_of_week,
                                            Year,
                                            Month,
                                            Day,
                                            Hour,
                                            Minute,
                                            Second,
                                            Offset_minutes}
                                    )
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("/home/benjamin/building/gleam/glrss_parser/src/glrss_parser/rss/date.gleam", 61).
-spec parse(binary()) -> {ok, rss_date()} | {error, party:parse_error(any())}.
parse(Str) ->
    party:go(date_time(), Str).