openfeature

-module(providers@in_memory).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([in_memory_provider/1]).

-spec get_metadata() -> metadata:metadata().
get_metadata() ->
    {metadata, <<"In-Memory Provider"/utf8>>}.

-spec resolve_evaluation(
    binary(),
    gleam@dict:dict(binary(), any()),
    fun((gleam@dynamic:dynamic_()) -> {ok, FTQ} |
        {error, list(gleam@dynamic:decode_error())})
) -> evaluation:resolution_details(FTQ).
resolve_evaluation(Flag, Flags, Decoder) ->
    case gleam@dict:get(Flags, Flag) of
        {ok, Val} ->
            case begin
                _pipe = gleam@dynamic:from(Val),
                Decoder(_pipe)
            end of
                {ok, Resolved_val} ->
                    {resolution_success, Resolved_val, static};

                {error, _} ->
                    {resolution_error, type_mismatch, <<"type mismatch"/utf8>>}
            end;

        {error, _} ->
            {resolution_error, flag_not_found, <<"not found"/utf8>>}
    end.

-spec resolve_dynamic_evaluation(binary(), gleam@dict:dict(binary(), any())) -> evaluation:resolution_details(gleam@dynamic:dynamic_()).
resolve_dynamic_evaluation(Flag, Flags) ->
    case gleam@dict:get(Flags, Flag) of
        {ok, Val} ->
            {resolution_success, gleam@dynamic:from(Val), static};

        {error, _} ->
            {resolution_error, flag_not_found, <<"not found"/utf8>>}
    end.

-spec in_memory_provider(gleam@dict:dict(binary(), any())) -> provider:feature_provider().
in_memory_provider(From) ->
    {feature_provider,
        fun(Context) ->
            gleam@io:debug(Context),
            {ok, nil}
        end,
        fun() -> nil end,
        fun get_metadata/0,
        fun(Flag, _, _) ->
            resolve_evaluation(Flag, From, fun gleam@dynamic:bool/1)
        end,
        fun(Flag@1, _, _) ->
            resolve_evaluation(Flag@1, From, fun gleam@dynamic:string/1)
        end,
        fun(Flag@2, _, _) ->
            resolve_evaluation(Flag@2, From, fun gleam@dynamic:int/1)
        end,
        fun(Flag@3, _, _) ->
            resolve_evaluation(Flag@3, From, fun gleam@dynamic:float/1)
        end,
        fun(Flag@4, _, _) -> resolve_dynamic_evaluation(Flag@4, From) end}.