"""Heating MPC custom integration, initial release shadow-only."""
from __future__ import annotations

from homeassistant.const import Platform
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.storage import Store
from homeassistant.helpers import entity_registry as er

from .const import DOMAIN, CONF_OUTSIDE, WEATHER_SOURCES
from .weather_sources import sources_for
from .coordinator import HeatingMPCCoordinator

PLATFORMS: list[Platform] = [Platform.SENSOR, Platform.BINARY_SENSOR]


async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    coordinator = HeatingMPCCoordinator(hass, entry)
    await coordinator.async_restore_model()
    await coordinator.async_config_entry_first_refresh()
    hass.data.setdefault(DOMAIN, {})[entry.entry_id] = coordinator
    try:
        await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
    except Exception:
        hass.data[DOMAIN].pop(entry.entry_id, None)
        raise
    # Remove only obsolete room forecasts belonging to this entry/platform.
    registry = er.async_get(hass)
    expected = {f"{entry.entry_id}_{room}_predicted_60min" for room in coordinator.rooms}
    for entity in er.async_entries_for_config_entry(registry, entry.entry_id):
        if (entity.platform == DOMAIN and
                entity.unique_id.startswith(f"{entry.entry_id}_sensor.") and
                entity.unique_id.endswith("_predicted_60min") and
                entity.unique_id not in expected):
            registry.async_remove(entity.entity_id)
    entry.async_on_unload(entry.add_update_listener(async_reload_entry))
    return True


async def async_reload_entry(hass: HomeAssistant, entry: ConfigEntry) -> None:
    await hass.config_entries.async_reload(entry.entry_id)


async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    ok = await hass.config_entries.async_unload_platforms(entry, PLATFORMS)
    if ok:
        hass.data[DOMAIN].pop(entry.entry_id, None)
    return ok


async def async_remove_entry(hass: HomeAssistant, entry: ConfigEntry) -> None:
    """Remove the learned model when this integration instance is deleted."""
    store = Store(hass, 1, f"{DOMAIN}.{entry.entry_id}")
    await store.async_remove()


async def async_migrate_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """Migrate legacy single weather source without changing user selections."""
    if entry.version > 2:
        return False
    if entry.version == 1:
        def migrate(config):
            result = dict(config)
            if CONF_OUTSIDE in result:
                result[WEATHER_SOURCES["temperature"]] = sources_for(result, "temperature")
                result.pop(CONF_OUTSIDE)
            return result
        hass.config_entries.async_update_entry(
            entry, data=migrate(entry.data), options=migrate(entry.options),
            version=2, minor_version=1,
        )
    return True