-module(pig@supervisor).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/pig/supervisor.gleam").
-export([start_supervised/2, start_supervised_with_session_store/3, run_with_timeout/3, run/2, run_continue_with_timeout/2, run_continue/1, stop/1]).
-export_type([supervised_agent/0, start_error/0]).

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

?MODULEDOC(
    " Supervised agent — wraps agent in OTP static supervisor.\n"
    "\n"
    " The easy path: `start_supervised(config)` gives you an agent\n"
    " managed by a OneForOne supervisor. Advanced users can still\n"
    " use `pig.start(config)` for standalone agents.\n"
).

-type supervised_agent() :: {supervised_agent,
        gleam@erlang@process:subject(pig@agent@runtime:runtime_msg()),
        gleam@erlang@process:pid_()}.

-type start_error() :: {actor_start, gleam@otp@actor:start_error()} |
    {session_load, pig@session_store:session_error()}.

-file("src/pig/supervisor.gleam", 89).
-spec start_with_runtime(
    list(pig@obs@consumer_spec:consumer_spec()),
    fun((gleam@erlang@process:name(pig@obs@dispatcher:dispatcher_message()), gleam@erlang@process:name(pig@agent@runtime:runtime_msg())) -> gleam@otp@supervision:child_specification(nil))
) -> {ok, supervised_agent()} | {error, start_error()}.
start_with_runtime(Consumer_specs, Runtime_spec) ->
    Dispatcher_name = gleam_erlang_ffi:new_name(<<"pig_event_dispatcher"/utf8>>),
    Agent_name = gleam_erlang_ffi:new_name(<<"pig_agent"/utf8>>),
    Event_tree = begin
        _pipe = gleam@otp@static_supervisor:new(one_for_all),
        _pipe@1 = gleam@otp@static_supervisor:add(
            _pipe,
            pig@obs@dispatcher:supervised(Dispatcher_name)
        ),
        gleam@list:fold(
            Consumer_specs,
            _pipe@1,
            fun(Builder, Entry) ->
                gleam@otp@static_supervisor:add(
                    Builder,
                    erlang:element(2, Entry)
                )
            end
        )
    end,
    App_tree = begin
        _pipe@2 = gleam@otp@static_supervisor:new(one_for_one),
        _pipe@3 = gleam@otp@static_supervisor:add(
            _pipe@2,
            gleam@otp@static_supervisor:supervised(Event_tree)
        ),
        gleam@otp@static_supervisor:add(
            _pipe@3,
            Runtime_spec(Dispatcher_name, Agent_name)
        )
    end,
    case gleam@otp@static_supervisor:start(App_tree) of
        {ok, Started} ->
            Dispatcher_subject = gleam@erlang@process:named_subject(
                Dispatcher_name
            ),
            Agent_subject = gleam@erlang@process:named_subject(Agent_name),
            gleam@list:each(
                Consumer_specs,
                fun(Entry@1) ->
                    Consumer_subject = gleam@erlang@process:named_subject(
                        erlang:element(3, Entry@1)
                    ),
                    gleam@erlang@process:send(
                        Dispatcher_subject,
                        {register_consumer, Consumer_subject}
                    )
                end
            ),
            {ok, {supervised_agent, Agent_subject, erlang:element(2, Started)}};

        {error, E} ->
            {error, {actor_start, E}}
    end.

-file("src/pig/supervisor.gleam", 72).
-spec start_with_session(
    pig@agent@state:agent_config(),
    list(pig@obs@consumer_spec:consumer_spec()),
    list(pig_protocol@message:message()),
    pig@agent@runtime:session_state()
) -> {ok, supervised_agent()} | {error, start_error()}.
start_with_session(Agent_config, Consumer_specs, Initial_history, Session) ->
    start_with_runtime(
        Consumer_specs,
        fun(Dispatcher_name, Name) ->
            pig@agent@runtime:supervised(
                Agent_config,
                Dispatcher_name,
                Name,
                Initial_history,
                Session
            )
        end
    ).

-file("src/pig/supervisor.gleam", 40).
?DOC(
    " Start a supervised agent without durable session storage.\n"
    "\n"
    " This convenience path starts with empty history and no durable session.\n"
).
-spec start_supervised(
    pig@agent@state:agent_config(),
    list(pig@obs@consumer_spec:consumer_spec())
) -> {ok, supervised_agent()} | {error, start_error()}.
start_supervised(Agent_config, Consumer_specs) ->
    start_with_session(Agent_config, Consumer_specs, [], session_disabled).

-file("src/pig/supervisor.gleam", 52).
?DOC(
    " Preflight a durable session, then start a supervised agent.\n"
    "\n"
    " The preflight preserves a typed `SessionLoad` error without starting the\n"
    " supervision tree. The runtime independently reloads the store every time\n"
    " its worker starts, including after OTP child restarts.\n"
).
-spec start_supervised_with_session_store(
    pig@agent@state:agent_config(),
    list(pig@obs@consumer_spec:consumer_spec()),
    pig@session_store:session_store()
) -> {ok, supervised_agent()} | {error, start_error()}.
start_supervised_with_session_store(Agent_config, Consumer_specs, Store) ->
    {session_store, Load, _} = Store,
    case Load() of
        {error, Error} ->
            {error, {session_load, Error}};

        {ok, _} ->
            start_with_runtime(
                Consumer_specs,
                fun(Dispatcher_name, Name) ->
                    pig@agent@runtime:supervised_with_session_store(
                        Agent_config,
                        Dispatcher_name,
                        Name,
                        Store
                    )
                end
            )
    end.

-file("src/pig/supervisor.gleam", 141).
?DOC(" Run a prompt against the supervised agent with an explicit timeout.\n").
-spec run_with_timeout(supervised_agent(), binary(), integer()) -> {ok,
        pig_protocol@message:message()} |
    {error, pig@run_error:run_error()}.
run_with_timeout(Sup, Prompt, Timeout_ms) ->
    pig@agent@runtime:run(erlang:element(2, Sup), Prompt, Timeout_ms).

-file("src/pig/supervisor.gleam", 136).
?DOC(" Run a prompt against the supervised agent with a 120-second timeout.\n").
-spec run(supervised_agent(), binary()) -> {ok, pig_protocol@message:message()} |
    {error, pig@run_error:run_error()}.
run(Sup, Prompt) ->
    run_with_timeout(Sup, Prompt, 120000).

-file("src/pig/supervisor.gleam", 155).
?DOC(" Resume a supervised agent's history with an explicit timeout.\n").
-spec run_continue_with_timeout(supervised_agent(), integer()) -> {ok,
        pig_protocol@message:message()} |
    {error, pig@run_error:run_error()}.
run_continue_with_timeout(Sup, Timeout_ms) ->
    pig@agent@runtime:run_continue(erlang:element(2, Sup), Timeout_ms).

-file("src/pig/supervisor.gleam", 150).
?DOC(" Resume a supervised agent's loaded or interrupted history.\n").
-spec run_continue(supervised_agent()) -> {ok, pig_protocol@message:message()} |
    {error, pig@run_error:run_error()}.
run_continue(Sup) ->
    run_continue_with_timeout(Sup, 120000).

-file("src/pig/supervisor.gleam", 166).
?DOC(
    " Stop the supervised agent.\n"
    "\n"
    " Sends an exit signal to the supervisor process. OTP cascades\n"
    " shutdown to the agent child process.\n"
).
-spec stop(supervised_agent()) -> nil.
stop(Sup) ->
    gleam@erlang@process:send_exit(erlang:element(3, Sup)).