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

-export([set_provider/1, get_provider_metadata/0, set_context/1, set_domain_provider/2, get_domain_provider_metadata/1]).
-export_type([api/0]).

-opaque api() :: {api,
        gleam@option:option(provider:feature_provider()),
        evaluation_context:evaluation_context()}.

-spec default_api() -> api().
default_api() ->
    {api, none, {evaluation_context, none, gleam@dict:new()}}.

-spec set_provider(provider:feature_provider()) -> {ok, nil} | {error, nil}.
set_provider(Provider) ->
    Api = persistent_term:get(<<"openfeature_api"/utf8>>, default_api()),
    New_api = {api, {some, Provider}, erlang:element(3, Api)},
    persistent_term:put(<<"openfeature_api"/utf8>>, New_api),
    (erlang:element(2, Provider))(erlang:element(3, Api)).

-spec get_provider_metadata() -> gleam@option:option(metadata:metadata()).
get_provider_metadata() ->
    _pipe = erlang:element(
        2,
        persistent_term:get(<<"openfeature_api"/utf8>>, default_api())
    ),
    gleam@option:map(
        _pipe,
        fun(Provider) -> (erlang:element(4, Provider))() end
    ).

-spec set_context(evaluation_context:evaluation_context()) -> nil.
set_context(Context) ->
    Api = persistent_term:get(<<"openfeature_api"/utf8>>, default_api()),
    New_api = {api, erlang:element(2, Api), Context},
    persistent_term:put(<<"openfeature_api"/utf8>>, New_api).

-spec set_domain_provider(binary(), provider:feature_provider()) -> nil.
set_domain_provider(Domain, Provider) ->
    persistent_term:put(<<"domain_provider__"/utf8, Domain/binary>>, Provider).

-spec get_domain_provider_metadata(binary()) -> gleam@option:option(metadata:metadata()).
get_domain_provider_metadata(Domain) ->
    _pipe = persistent_term:get(
        <<"domain_provider__"/utf8, Domain/binary>>,
        none
    ),
    gleam@option:map(
        _pipe,
        fun(Provider) -> (erlang:element(4, Provider))() end
    ).