-module(gleam@set).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([new/0, size/1, contains/2, delete/2, to_list/1, fold/3, filter/2, drop/2, take/2, intersection/2, difference/2, is_subset/2, is_disjoint/2, insert/2, from_list/1, union/2, symmetric_difference/2]).
-export_type([set/1]).

-opaque set(FCO) :: {set, gleam@dict:dict(FCO, list(nil))}.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 39).
-spec new() -> set(any()).
new() ->
    {set, gleam@dict:new()}.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 57).
-spec size(set(any())) -> integer().
size(Set) ->
    maps:size(erlang:element(2, Set)).

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 99).
-spec contains(set(FCX), FCX) -> boolean().
contains(Set, Member) ->
    _pipe = erlang:element(2, Set),
    _pipe@1 = gleam@dict:get(_pipe, Member),
    gleam@result:is_ok(_pipe@1).

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 120).
-spec delete(set(FCZ), FCZ) -> set(FCZ).
delete(Set, Member) ->
    {set, gleam@dict:delete(erlang:element(2, Set), Member)}.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 138).
-spec to_list(set(FDC)) -> list(FDC).
to_list(Set) ->
    gleam@dict:keys(erlang:element(2, Set)).

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 179).
-spec fold(set(FDI), FDK, fun((FDK, FDI) -> FDK)) -> FDK.
fold(Set, Initial, Reducer) ->
    gleam@dict:fold(
        erlang:element(2, Set),
        Initial,
        fun(A, K, _) -> Reducer(A, K) end
    ).

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 203).
-spec filter(set(FDL), fun((FDL) -> boolean())) -> set(FDL).
filter(Set, Predicate) ->
    {set,
        gleam@dict:filter(erlang:element(2, Set), fun(M, _) -> Predicate(M) end)}.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 219).
-spec drop(set(FDO), list(FDO)) -> set(FDO).
drop(Set, Disallowed) ->
    gleam@list:fold(Disallowed, Set, fun delete/2).

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 237).
-spec take(set(FDS), list(FDS)) -> set(FDS).
take(Set, Desired) ->
    {set, gleam@dict:take(erlang:element(2, Set), Desired)}.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 241).
-spec order(set(FDW), set(FDW)) -> {set(FDW), set(FDW)}.
order(First, Second) ->
    case maps:size(erlang:element(2, First)) > maps:size(
        erlang:element(2, Second)
    ) of
        true ->
            {First, Second};

        false ->
            {Second, First}
    end.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 275).
-spec intersection(set(FEF), set(FEF)) -> set(FEF).
intersection(First, Second) ->
    {Larger, Smaller} = order(First, Second),
    take(Larger, to_list(Smaller)).

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 293).
-spec difference(set(FEJ), set(FEJ)) -> set(FEJ).
difference(First, Second) ->
    drop(First, to_list(Second)).

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 314).
-spec is_subset(set(FEN), set(FEN)) -> boolean().
is_subset(First, Second) ->
    intersection(First, Second) =:= First.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 332).
-spec is_disjoint(set(FEQ), set(FEQ)) -> boolean().
is_disjoint(First, Second) ->
    intersection(First, Second) =:= new().

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 75).
-spec insert(set(FCU), FCU) -> set(FCU).
insert(Set, Member) ->
    {set, gleam@dict:insert(erlang:element(2, Set), Member, [])}.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 156).
-spec from_list(list(FDF)) -> set(FDF).
from_list(Members) ->
    Dict = gleam@list:fold(
        Members,
        gleam@dict:new(),
        fun(M, K) -> gleam@dict:insert(M, K, []) end
    ),
    {set, Dict}.

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 259).
-spec union(set(FEB), set(FEB)) -> set(FEB).
union(First, Second) ->
    {Larger, Smaller} = order(First, Second),
    fold(Smaller, Larger, fun insert/2).

-file("/home/pgbiel/GitHub/glistix_stdlib/src/gleam/set.gleam", 344).
-spec symmetric_difference(set(FET), set(FET)) -> set(FET).
symmetric_difference(First, Second) ->
    difference(union(First, Second), intersection(First, Second)).