-module(gleam@otp@process).
-compile(no_auto_import).

-export([new_reference/0, self/0, system_receiver/0, new_channel/0, new_bare_sender/1, close_channels/1, pid/1, pid_from_dynamic/1, send/2, null_sender/1, monitor_process/1, monitor_port/1, receive_forever/1, flush/1, merge_receiver/2, bare_message_receiver/0, debug_state/1, is_alive/1, kill/1, send_exit/2, start/1, start_unlinked/1, 'receive'/2, map_receiver/2, map_sender/2, try_call/3, call/3, message_queue_size/1, trap_exits/0, stop_trapping_exits/0, send_after/3, cancel_timer/1, link/1, unlink/1, untyped_send/2]).
-export_type([pid_/0, reference_/0, sender/1, receiver/1, process_monitor_flag/0, port_monitor_flag/0, process_down/0, port_down/0, exit/0, exit_reason/0, mode/0, debug_option/0, debug_state/0, status_info/0, system_message/0, kill_flag/0, call_error/1, message_queue_len_flag/0, timer/0, cancelled/0]).

-type pid_() :: any().

-type reference_() :: any().

-opaque sender(EKU) :: {sender,
                        pid_(),
                        gleam@option:option(fun((EKU) -> gleam@dynamic:dynamic()))}.

-type receiver(Msg) :: any() | {gleam_phantom, Msg}.

-type process_monitor_flag() :: process.

-type port_monitor_flag() :: port.

-type process_down() :: {process_down, pid_(), gleam@dynamic:dynamic()}.

-type port_down() :: {port_down,
                      gleam@otp@port:port_(),
                      gleam@dynamic:dynamic()}.

-type exit() :: {exit, pid_(), gleam@dynamic:dynamic()}.

-type exit_reason() :: normal | shutdown | {abnormal, gleam@dynamic:dynamic()}.

-type mode() :: running | suspended.

-type debug_option() :: no_debug.

-type debug_state() :: any().

-type status_info() :: {status_info,
                        gleam@erlang@atom:atom_(),
                        pid_(),
                        mode(),
                        debug_state(),
                        gleam@dynamic:dynamic()}.

-type system_message() :: {get_status, sender(status_info())} |
    {suspend, sender(nil)} |
    {resume, sender(nil)} |
    {get_state, sender(gleam@dynamic:dynamic())}.

-type kill_flag() :: kill.

-type call_error(EKW) :: {callee_down, gleam@dynamic:dynamic()} |
    call_timeout |
    {gleam_phantom, EKW}.

-type message_queue_len_flag() :: message_queue_len.

-type timer() :: any().

-type cancelled() :: timer_not_found | {cancelled, integer()}.

-spec new_reference() -> reference_().
new_reference() ->
    erlang:make_ref().

-spec self() -> pid_().
self() ->
    erlang:self().

-spec system_receiver() -> receiver(system_message()).
system_receiver() ->
    gleam_otp_external:system_receiver().

-spec new_channel() -> {sender(ELD), receiver(ELD)}.
new_channel() ->
    Reference = erlang:make_ref(),
    Sender = begin
        _pipe = erlang:self(),
        _pipe@1 = new_bare_sender(_pipe),
        map_sender(_pipe@1, fun(Msg) -> {Reference, Msg} end)
    end,
    Receiver = gleam_otp_external:new_receiver(Reference),
    {Sender, Receiver}.

-spec new_bare_sender(pid_()) -> sender(any()).
new_bare_sender(Pid) ->
    Prepare = fun(Msg) -> gleam@dynamic:from(Msg) end,
    {sender, Pid, {some, Prepare}}.

-spec close_channels(receiver(any())) -> nil.
close_channels(A) ->
    gleam_otp_external:close_channels(A).

-spec pid(sender(any())) -> pid_().
pid(Sender) ->
    erlang:element(2, Sender).

-spec pid_from_dynamic(gleam@dynamic:dynamic()) -> {ok, pid_()} |
    {error, list(gleam@dynamic:decode_error())}.
pid_from_dynamic(A) ->
    gleam_otp_external:pid_from_dynamic(A).

-spec send(sender(ELP), ELP) -> sender(ELP).
send(Sender, Message) ->
    case erlang:element(3, Sender) of
        {some, Prepare} ->
            _pipe = Message,
            _pipe@1 = Prepare(_pipe),
            erlang:send(erlang:element(2, Sender), _pipe@1),
            Sender;

        none ->
            Sender
    end.

-spec null_sender(pid_()) -> sender(any()).
null_sender(Pid) ->
    {sender, Pid, none}.

-spec monitor_process(pid_()) -> receiver(process_down()).
monitor_process(Pid) ->
    Reference = erlang:monitor(process, Pid),
    gleam_otp_external:new_receiver({process, Reference}).

-spec monitor_port(gleam@otp@port:port_()) -> receiver(port_down()).
monitor_port(Port) ->
    Reference = erlang:monitor(port, Port),
    gleam_otp_external:new_receiver({port, Reference}).

-spec receive_forever(receiver(ELW)) -> ELW.
receive_forever(A) ->
    gleam_otp_external:run_receiver_forever(A).

-spec flush(receiver(any())) -> integer().
flush(A) ->
    gleam_otp_external:flush_receiver(A).

-spec merge_receiver(receiver(EMA), receiver(EMA)) -> receiver(EMA).
merge_receiver(A, B) ->
    gleam_otp_external:merge_receiver(A, B).

-spec bare_message_receiver() -> receiver(gleam@dynamic:dynamic()).
bare_message_receiver() ->
    gleam_otp_external:bare_message_receiver().

-spec debug_state(list(debug_option())) -> debug_state().
debug_state(A) ->
    sys:debug_options(A).

-spec is_alive(pid_()) -> boolean().
is_alive(A) ->
    erlang:is_process_alive(A).

-spec kill(pid_()) -> nil.
kill(Pid) ->
    erlang:exit(Pid, kill),
    nil.

-spec send_exit(pid_(), any()) -> nil.
send_exit(Pid, Reason) ->
    erlang:exit(Pid, Reason),
    nil.

-spec start(fun(() -> any())) -> pid_().
start(A) ->
    erlang:spawn_link(A).

-spec start_unlinked(fun(() -> any())) -> pid_().
start_unlinked(A) ->
    erlang:spawn(A).

-spec 'receive'(receiver(EMO), integer()) -> {ok, EMO} | {error, nil}.
'receive'(A, B) ->
    gleam_otp_external:run_receiver(A, B).

-spec map_receiver(receiver(EMU), fun((EMU) -> EMS)) -> receiver(EMS).
map_receiver(A, B) ->
    gleam_otp_external:map_receiver(A, B).

-spec map_sender(sender(EMW), fun((EMY) -> EMW)) -> sender(EMY).
map_sender(Sender, Mapper) ->
    Wrap = fun(_capture) -> gleam@function:compose(Mapper, _capture) end,
    Prepare = gleam@option:map(erlang:element(3, Sender), Wrap),
    {sender, erlang:element(2, Sender), Prepare}.

-spec try_call(sender(ENA), fun((sender(ENC)) -> ENA), integer()) -> {ok, ENC} |
    {error, call_error(ENC)}.
try_call(Sender, Make_request, Timeout) ->
    {Reply_sender, Reply_receiver} = new_channel(),
    Monitor = monitor_process(pid(Sender)),
    send(Sender, Make_request(Reply_sender)),
    Receiver = begin
        _pipe = Reply_receiver,
        _pipe@1 = gleam_otp_external:map_receiver(_pipe, fun(A) -> {ok, A} end),
        gleam_otp_external:merge_receiver(
            _pipe@1,
            gleam_otp_external:map_receiver(
                Monitor,
                fun(Down) -> {error, {callee_down, erlang:element(3, Down)}} end
            )
        )
    end,
    Res = gleam_otp_external:run_receiver(Receiver, Timeout),
    gleam_otp_external:close_channels(Receiver),
    case Res of
        {error, nil} ->
            {error, call_timeout};

        {ok, Res@1} ->
            Res@1
    end.

-spec call(sender(ENH), fun((sender(ENJ)) -> ENH), integer()) -> ENJ.
call(Sender, Make_request, Timeout) ->
    {ok, Resp@1} = case try_call(Sender, Make_request, Timeout) of
        {ok, Resp} -> {ok, Resp};
        _try ->
            erlang:error(#{gleam_error => assert,
                           message => <<"Assertion pattern match failed"/utf8>>,
                           value => _try,
                           module => <<"gleam/otp/process"/utf8>>,
                           function => <<"call"/utf8>>,
                           line => 475})
    end,
    Resp@1.

-spec message_queue_size(pid_()) -> integer().
message_queue_size(Pid) ->
    erlang:element(2, erlang:process_info(Pid, message_queue_len)).

-spec trap_exits() -> receiver(exit()).
trap_exits() ->
    gleam_otp_external:trap_exits().

-spec stop_trapping_exits() -> nil.
stop_trapping_exits() ->
    gleam_otp_external:stop_trapping_exits().

-spec send_after(sender(ENN), integer(), ENN) -> timer().
send_after(Sender, Delay, Message) ->
    case erlang:element(3, Sender) of
        {some, Prepare} ->
            erlang:send_after(
                Delay,
                erlang:element(2, Sender),
                Prepare(Message)
            );

        none ->
            erlang:make_ref()
    end.

-spec cancel_timer(timer()) -> cancelled().
cancel_timer(Timer) ->
    case gleam@dynamic:int(erlang:cancel_timer(Timer)) of
        {ok, I} ->
            {cancelled, I};

        {error, _@1} ->
            timer_not_found
    end.

-spec link(pid_()) -> nil.
link(Pid) ->
    erlang:link(Pid),
    nil.

-spec unlink(pid_()) -> nil.
unlink(Pid) ->
    erlang:link(Pid),
    nil.

-spec untyped_send(pid_(), ENP) -> ENP.
untyped_send(A, B) ->
    erlang:send(A, B).