-module(gleam@map).
-compile([no_auto_import, nowarn_unused_vars]).

-export([size/1, to_list/1, from_list/1, has_key/2, new/0, get/2, insert/3, map_values/2, keys/1, values/1, filter/2, take/2, merge/2, delete/2, drop/2, update/3, fold/3]).
-export_type([map_/2]).

-type map_(LP, LQ) :: any() | {gleam_phantom, LP, LQ}.

-spec size(map_(any(), any())) -> integer().
size(Map) ->
    maps:size(Map).

-spec to_list(map_(LZ, MA)) -> list({LZ, MA}).
to_list(Map) ->
    maps:to_list(Map).

-spec from_list(list({MJ, MK})) -> map_(MJ, MK).
from_list(List) ->
    maps:from_list(List).

-spec has_key(map_(MT, any()), MT) -> boolean().
has_key(Map, Key) ->
    maps:is_key(Key, Map).

-spec new() -> map_(any(), any()).
new() ->
    maps:new().

-spec get(map_(NJ, NK), NJ) -> {ok, NK} | {error, nil}.
get(From, Get) ->
    gleam_stdlib:map_get(From, Get).

-spec insert(map_(NV, NW), NV, NW) -> map_(NV, NW).
insert(Map, Key, Value) ->
    maps:put(Key, Value, Map).

-spec map_values(map_(OH, OI), fun((OH, OI) -> OL)) -> map_(OH, OL).
map_values(Map, Fun) ->
    maps:map(Fun, Map).

-spec keys(map_(OV, any())) -> list(OV).
keys(Map) ->
    maps:keys(Map).

-spec values(map_(any(), PG)) -> list(PG).
values(Map) ->
    maps:values(Map).

-spec filter(map_(PP, PQ), fun((PP, PQ) -> boolean())) -> map_(PP, PQ).
filter(Map, Property) ->
    maps:filter(Property, Map).

-spec take(map_(QB, QC), list(QB)) -> map_(QB, QC).
take(Map, Desired_keys) ->
    maps:with(Desired_keys, Map).

-spec merge(map_(QP, QQ), map_(QP, QQ)) -> map_(QP, QQ).
merge(Map, New_entries) ->
    maps:merge(Map, New_entries).

-spec delete(map_(RF, RG), RF) -> map_(RF, RG).
delete(Map, Key) ->
    maps:remove(Key, Map).

-spec drop(map_(RR, RS), list(RR)) -> map_(RR, RS).
drop(Map, Disallowed_keys) ->
    case Disallowed_keys of
        [] ->
            Map;

        [X | Xs] ->
            drop(delete(Map, X), Xs)
    end.

-spec update(map_(RY, RZ), RY, fun((gleam@option:option(RZ)) -> RZ)) -> map_(RY, RZ).
update(Map, Key, Fun) ->
    _pipe = Map,
    _pipe@1 = get(_pipe, Key),
    _pipe@2 = gleam@option:from_result(_pipe@1),
    _pipe@3 = Fun(_pipe@2),
    insert(Map, Key, _pipe@3).

-spec do_fold(list({SF, SG}), SI, fun((SI, SF, SG) -> SI)) -> SI.
do_fold(List, Initial, Fun) ->
    case List of
        [] ->
            Initial;

        [{K, V} | Rest] ->
            do_fold(Rest, Fun(Initial, K, V), Fun)
    end.

-spec fold(map_(SJ, SK), SN, fun((SN, SJ, SK) -> SN)) -> SN.
fold(Map, Initial, Fun) ->
    _pipe = Map,
    _pipe@1 = to_list(_pipe),
    do_fold(_pipe@1, Initial, Fun).