"""Code to handle a Pulse Hub."""
from __future__ import annotations

import asyncio
from collections.abc import Callable

import aiopulse

from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.dispatcher import async_dispatcher_send

from .const import ACMEDA_ENTITY_REMOVE, ACMEDA_HUB_UPDATE, LOGGER
from .helpers import update_devices


class PulseHub:
    """Manages a single Pulse Hub."""

    api: aiopulse.Hub

    def __init__(self, hass: HomeAssistant, config_entry: ConfigEntry) -> None:
        """Initialize the system."""
        self.config_entry = config_entry
        self.hass = hass
        self.tasks: list[asyncio.Task[None]] = []
        self.current_rollers: dict[int, aiopulse.Roller] = {}
        self.cleanup_callbacks: list[Callable[[], None]] = []

    @property
    def title(self) -> str:
        """Return the title of the hub shown in the integrations list."""
        return f"{self.api.id} ({self.api.host})"

    @property
    def host(self) -> str:
        """Return the host of this hub."""
        return self.config_entry.data["host"]  # type: ignore[no-any-return]

    async def async_setup(self, tries: int = 0) -> bool:
        """Set up a hub based on host parameter."""
        self.api = hub = aiopulse.Hub(self.host)

        hub.callback_subscribe(self.async_notify_update)
        self.tasks.append(asyncio.create_task(hub.run()))

        LOGGER.debug("Hub setup complete")
        return True

    async def async_reset(self) -> bool:
        """Reset this hub to default state."""

        for cleanup_callback in self.cleanup_callbacks:
            cleanup_callback()

        # If not setup
        if self.api is None:
            return False

        self.api.callback_unsubscribe(self.async_notify_update)
        await self.api.stop()
        del self.api
        self.api = None

        # Wait for any running tasks to complete
        await asyncio.wait(self.tasks)

        return True

    async def async_notify_update(self, update_type: aiopulse.UpdateType) -> None:
        """Evaluate entities when hub reports that update has occurred."""
        LOGGER.debug("Hub {update_type.name} updated")

        if update_type == aiopulse.UpdateType.rollers:
            await update_devices(self.hass, self.config_entry, self.api.rollers)
            self.hass.config_entries.async_update_entry(
                self.config_entry, title=self.title
            )

            async_dispatcher_send(
                self.hass, ACMEDA_HUB_UPDATE.format(self.config_entry.entry_id)
            )

            for unique_id in list(self.current_rollers):
                if unique_id not in self.api.rollers:
                    LOGGER.debug("Notifying remove of %s", unique_id)
                    self.current_rollers.pop(unique_id)
                    async_dispatcher_send(
                        self.hass, ACMEDA_ENTITY_REMOVE.format(unique_id)
                    )