import logging
from homeassistant.core import HomeAssistant
from homeassistant.helpers import device_registry as dr
from .const import DOMAIN

_LOGGER = logging.getLogger(__name__)

async def async_setup(hass: HomeAssistant, config: dict):
    return True

async def async_setup_entry(hass: HomeAssistant, entry):
    """Set up entry, create devices, and clean up old orphaned devices."""
    hass.data.setdefault(DOMAIN, {})
    hass.data[DOMAIN][entry.entry_id] = entry.data

    device_registry = dr.async_get(hass)

    # 1. Automatisches Aufräumen von alten Geister-Geräten
    active_entry_ids = set(hass.config_entries.async_entries(DOMAIN))
    active_ids = {e.entry_id for e in active_entry_ids}

    # Durchsuche die HA-Datenbank nach Geräten unserer Integration
    devices_to_clean = [
        dev for dev in device_registry.devices.values()
        if any(identifier[0] == DOMAIN for identifier in dev.identifiers)
    ]

    for device in devices_to_clean:
        # Falls ein Gerät zu einem gelöschten Config Entry gehört -> Löschen!
        # Der globale Hub ("global_bridge_hub") wird ignoriert und bleibt erhalten.
        for config_id in device.config_entries:
            if config_id not in active_ids and not any(idx == "global_bridge_hub" for _, idx in device.identifiers):
                _LOGGER.info(f"Entferne verwaistes WhatsApp-Gerät: {device.name}")
                device_registry.async_remove_device(device.id)

    # 2. Eigenes Gerät SPEZIFISCH für dieses aktive Konto anlegen
    device_registry.async_get_or_create(
        config_entry_id=entry.entry_id,
        identifiers={(DOMAIN, entry.entry_id)},
        name=f"WhatsApp {entry.title}",
        manufacturer="Bahmcloud",
        model="Kontakt-Endpunkt",
        sw_version="0.2.4",
    )

    # 3. Zentralen System-Hub anlegen mit erzwungener config_entry_id Bindung (HA Core Anforderung)
    # Nutzt Multi-Entry-Zusammenführung über den fixen "global_bridge_hub" Identifier.
    device_registry.async_get_or_create(
        config_entry_id=entry.entry_id,
        identifiers={(DOMAIN, "global_bridge_hub")},
        name="WhatsApp Bridge Hub",
        manufacturer="Bahmcloud",
        model="Bridge Server",
        sw_version="0.2.4",
    )

    # Forward the setup to the sensor platform to create entities
    await hass.config_entries.async_forward_entry_setups(entry, ["sensor"])
    
    # Registriere den Service (nur beim ersten Mal)
    if not hass.services.has_service(DOMAIN, "send_message"):
        from .services import async_setup_services
        await async_setup_services(hass)

    return True

async def async_unload_entry(hass: HomeAssistant, entry):
    """Unload a config entry."""
    unload_ok = await hass.config_entries.async_unload_platforms(entry, ["sensor"])
    if unload_ok:
        hass.data[DOMAIN].pop(entry.entry_id)
    return unload_ok