openfeature

-module(openfeature@api).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([get_provider_metadata/0, get_client/0, set_provider/1, set_context/1, set_domain_provider/2, get_domain_provider_metadata/1, get_domain_client/1, shutdown/0]).

-spec get_provider() -> openfeature@provider:feature_provider().
get_provider() ->
    persistent_term:get(
        <<"global_openfeature_provider"/utf8>>,
        openfeature@providers@no_op:provider()
    ).

-spec get_provider_metadata() -> openfeature@provider:metadata().
get_provider_metadata() ->
    (erlang:element(4, get_provider()))().

-spec get_client() -> openfeature@client:client().
get_client() ->
    {client, get_provider(), {client_metadata, global}}.

-spec set_provider(openfeature@provider:feature_provider()) -> {ok, nil} |
    {error, nil}.
set_provider(Provider) ->
    persistent_term:put(<<"global_openfeature_provider"/utf8>>, Provider),
    Context = persistent_term:get(
        <<"global_openfeature_context"/utf8>>,
        openfeature@evaluation_context:empty()
    ),
    (erlang:element(2, Provider))(Context).

-spec set_context(openfeature@evaluation_context:evaluation_context()) -> nil.
set_context(Context) ->
    persistent_term:put(<<"global_openfeature_context"/utf8>>, Context).

-spec get_domain_provider_registry() -> gleam@dict:dict(binary(), openfeature@provider:feature_provider()).
get_domain_provider_registry() ->
    persistent_term:get(
        <<"openfeature_domain_providers"/utf8>>,
        gleam@dict:new()
    ).

-spec set_domain_provider(binary(), openfeature@provider:feature_provider()) -> nil.
set_domain_provider(Domain, Provider) ->
    _pipe = get_domain_provider_registry(),
    _pipe@1 = gleam@dict:insert(_pipe, Domain, Provider),
    persistent_term:put(<<"openfeature_domain_providers"/utf8>>, _pipe@1).

-spec get_domain_provider(binary()) -> openfeature@provider:feature_provider().
get_domain_provider(Domain) ->
    _pipe = get_domain_provider_registry(),
    _pipe@1 = gleam@dict:get(_pipe, Domain),
    gleam@result:unwrap(_pipe@1, get_provider()).

-spec get_domain_provider_metadata(binary()) -> openfeature@provider:metadata().
get_domain_provider_metadata(Domain) ->
    (erlang:element(4, get_domain_provider(Domain)))().

-spec get_domain_client(binary()) -> openfeature@client:client().
get_domain_client(Domain) ->
    {client, get_domain_provider(Domain), {client_metadata, {scoped, Domain}}}.

-spec shutdown() -> boolean().
shutdown() ->
    _pipe = get_domain_provider_registry(),
    _pipe@1 = gleam@dict:values(_pipe),
    _pipe@2 = gleam@list:prepend(_pipe@1, get_provider()),
    gleam@list:each(
        _pipe@2,
        fun(Provider) -> (erlang:element(3, Provider))() end
    ),
    persistent_term:erase(<<"openfeature_domain_providers"/utf8>>),
    persistent_term:erase(<<"global_openfeature_provider"/utf8>>),
    persistent_term:erase(<<"global_openfeature_context"/utf8>>).