-module(envie@testing).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/envie/testing.gleam").
-export([isolated/1, with_env/2, with_dotenv_content/2]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

-file("src/envie/testing.gleam", 35).
?DOC(" Run `test_fn` with an empty environment; original env is restored afterwards.\n").
-spec isolated(fun(() -> EHF)) -> EHF.
isolated(Test_fn) ->
    Original_env = envie:all(),
    _pipe = maps:keys(Original_env),
    gleam@list:each(_pipe, fun envie:unset/1),
    Result = envie_ffi:rescue(Test_fn),
    _pipe@1 = maps:to_list(Original_env),
    gleam@list:each(
        _pipe@1,
        fun(Pair) ->
            {Key, Value} = Pair,
            envie:set(Key, Value)
        end
    ),
    case Result of
        {ok, Value@1} ->
            Value@1;

        {error, Msg} ->
            erlang:error(#{gleam_error => panic,
                    message => Msg,
                    file => <<?FILEPATH/utf8>>,
                    module => <<"envie/testing"/utf8>>,
                    function => <<"isolated"/utf8>>,
                    line => 51})
    end.

-file("src/envie/testing.gleam", 63).
-spec save_env(list({binary(), binary()})) -> gleam@dict:dict(binary(), gleam@option:option(binary())).
save_env(Vars) ->
    _pipe = Vars,
    _pipe@1 = gleam@list:map(
        _pipe,
        fun(Pair) ->
            {Key, _} = Pair,
            Original = case envie:get(Key) of
                {ok, Value} ->
                    {some, Value};

                {error, _} ->
                    none
            end,
            {Key, Original}
        end
    ),
    maps:from_list(_pipe@1).

-file("src/envie/testing.gleam", 76).
-spec restore_env(gleam@dict:dict(binary(), gleam@option:option(binary()))) -> nil.
restore_env(Saved) ->
    _pipe = maps:to_list(Saved),
    gleam@list:each(
        _pipe,
        fun(Pair) ->
            {Key, Maybe_value} = Pair,
            case Maybe_value of
                {some, Value} ->
                    envie:set(Key, Value);

                none ->
                    envie:unset(Key)
            end
        end
    ).

-file("src/envie/testing.gleam", 16).
?DOC(
    " Run `test_fn` with the given environment variables set.\n"
    " Previous values are saved and restored afterwards (panic-safe).\n"
).
-spec with_env(list({binary(), binary()}), fun(() -> EHE)) -> EHE.
with_env(Vars, Test_fn) ->
    Original = save_env(Vars),
    gleam@list:each(
        Vars,
        fun(Pair) ->
            {Key, Value} = Pair,
            envie:set(Key, Value)
        end
    ),
    Result = envie_ffi:rescue(Test_fn),
    restore_env(Original),
    case Result of
        {ok, Value@1} ->
            Value@1;

        {error, Msg} ->
            erlang:error(#{gleam_error => panic,
                    message => Msg,
                    file => <<?FILEPATH/utf8>>,
                    module => <<"envie/testing"/utf8>>,
                    function => <<"with_env"/utf8>>,
                    line => 30})
    end.

-file("src/envie/testing.gleam", 56).
?DOC(" Parse `content` as `.env`, set the variables for `test_fn`, then restore the env.\n").
-spec with_dotenv_content(binary(), fun(() -> EHG)) -> EHG.
with_dotenv_content(Content, Test_fn) ->
    Vars@1 = case envie:parse_dotenv(Content) of
        {ok, Vars} -> Vars;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        file => <<?FILEPATH/utf8>>,
                        module => <<"envie/testing"/utf8>>,
                        function => <<"with_dotenv_content"/utf8>>,
                        line => 57,
                        value => _assert_fail,
                        start => 1549,
                        'end' => 1598,
                        pattern_start => 1560,
                        pattern_end => 1568})
    end,
    with_env(Vars@1, Test_fn).