"""Orquestador del Runtime server: ensambla tag_store + historian + alarm engine + drivers.

Sprint 4: simulator-only. Sprint 5: Modbus + NMEA 2000 reales.
"""

from __future__ import annotations

import logging
from dataclasses import dataclass, field
from pathlib import Path

from vmssailor.core.alarm import Alarm
from vmssailor.core.project import Project
from vmssailor.runtime.server.alarm_engine import AlarmEngine
from vmssailor.runtime.server.drivers import SimulatorDriver
from vmssailor.runtime.server.historian import Historian
from vmssailor.runtime.server.tag_store import TagStore

logger = logging.getLogger(__name__)


@dataclass(slots=True)
class RuntimeApp:
    """Conjunto de servicios del Runtime. Se construye con `build_runtime()`."""

    project: Project
    tag_store: TagStore
    historian: Historian
    alarm_engine: AlarmEngine
    simulator: SimulatorDriver
    alarm_events: list[Alarm] = field(default_factory=list)

    async def start(self) -> None:
        await self.historian.start(self.tag_store)
        await self.alarm_engine.start()
        await self.simulator.start()
        logger.info("RuntimeApp started — %d tags, simulator @ 0.5s", len(self.tag_store))

    async def stop(self) -> None:
        await self.simulator.stop()
        await self.alarm_engine.stop()
        await self.historian.stop()
        logger.info("RuntimeApp stopped")


def build_runtime(
    project: Project,
    *,
    historian_db: Path | str | None = None,
    simulator_tick_s: float = 0.5,
) -> RuntimeApp:
    """Construye un Runtime listo para usar (no arrancado todavía)."""
    tag_store = TagStore()
    tag_store.register_many(project.tags)

    historian = Historian(historian_db)

    alarm_events: list[Alarm] = []

    def _on_alarm_event(alarm: Alarm) -> None:
        alarm_events.append(alarm)

    alarm_engine = AlarmEngine(tag_store, on_alarm_event=_on_alarm_event)
    simulator = SimulatorDriver(tag_store, tick_period_s=simulator_tick_s)

    return RuntimeApp(
        project=project,
        tag_store=tag_store,
        historian=historian,
        alarm_engine=alarm_engine,
        simulator=simulator,
        alarm_events=alarm_events,
    )