"""The Shelly integration."""

from __future__ import annotations

import contextlib
from typing import Final

from aioshelly.block_device import BlockDevice
from aioshelly.common import ConnectionOptions
from aioshelly.const import DEFAULT_COAP_PORT, RPC_GENERATIONS
from aioshelly.exceptions import (
    DeviceConnectionError,
    InvalidAuthError,
    MacAddressMismatchError,
)
from aioshelly.rpc_device import RpcDevice
import voluptuous as vol

from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME, Platform
from homeassistant.core import HomeAssistant
from homeassistant.exceptions import ConfigEntryAuthFailed, ConfigEntryNotReady
from homeassistant.helpers import issue_registry as ir
from homeassistant.helpers.aiohttp_client import async_get_clientsession
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.device_registry import (
    CONNECTION_NETWORK_MAC,
    async_get as dr_async_get,
    format_mac,
)
from homeassistant.helpers.typing import ConfigType

from .const import (
    BLOCK_EXPECTED_SLEEP_PERIOD,
    BLOCK_WRONG_SLEEP_PERIOD,
    CONF_COAP_PORT,
    CONF_SLEEP_PERIOD,
    DOMAIN,
    FIRMWARE_UNSUPPORTED_ISSUE_ID,
    LOGGER,
    MODELS_WITH_WRONG_SLEEP_PERIOD,
    PUSH_UPDATE_ISSUE_ID,
)
from .coordinator import (
    ShellyBlockCoordinator,
    ShellyConfigEntry,
    ShellyEntryData,
    ShellyRestCoordinator,
    ShellyRpcCoordinator,
    ShellyRpcPollingCoordinator,
)
from .utils import (
    async_create_issue_unsupported_firmware,
    get_coap_context,
    get_device_entry_gen,
    get_http_port,
    get_ws_context,
)

BLOCK_PLATFORMS: Final = [
    Platform.BINARY_SENSOR,
    Platform.BUTTON,
    Platform.COVER,
    Platform.EVENT,
    Platform.LIGHT,
    Platform.SENSOR,
    Platform.SWITCH,
    Platform.UPDATE,
    Platform.VALVE,
]
BLOCK_SLEEPING_PLATFORMS: Final = [
    Platform.BINARY_SENSOR,
    Platform.CLIMATE,
    Platform.NUMBER,
    Platform.SENSOR,
]
RPC_PLATFORMS: Final = [
    Platform.BINARY_SENSOR,
    Platform.BUTTON,
    Platform.CLIMATE,
    Platform.COVER,
    Platform.EVENT,
    Platform.LIGHT,
    Platform.SENSOR,
    Platform.SWITCH,
    Platform.UPDATE,
]
RPC_SLEEPING_PLATFORMS: Final = [
    Platform.BINARY_SENSOR,
    Platform.SENSOR,
    Platform.UPDATE,
]

COAP_SCHEMA: Final = vol.Schema(
    {
        vol.Optional(CONF_COAP_PORT, default=DEFAULT_COAP_PORT): cv.port,
    }
)
CONFIG_SCHEMA: Final = vol.Schema({DOMAIN: COAP_SCHEMA}, extra=vol.ALLOW_EXTRA)


async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
    """Set up the Shelly component."""
    if (conf := config.get(DOMAIN)) is not None:
        hass.data[DOMAIN] = {CONF_COAP_PORT: conf[CONF_COAP_PORT]}

    return True


async def async_setup_entry(hass: HomeAssistant, entry: ShellyConfigEntry) -> bool:
    """Set up Shelly from a config entry."""
    # The custom component for Shelly devices uses shelly domain as well as core
    # integration. If the user removes the custom component but doesn't remove the
    # config entry, core integration will try to configure that config entry with an
    # error. The config entry data for this custom component doesn't contain host
    # value, so if host isn't present, config entry will not be configured.
    if not entry.data.get(CONF_HOST):
        LOGGER.warning(
            (
                "The config entry %s probably comes from a custom integration, please"
                " remove it if you want to use core Shelly integration"
            ),
            entry.title,
        )
        return False

    entry.runtime_data = ShellyEntryData()

    if get_device_entry_gen(entry) in RPC_GENERATIONS:
        return await _async_setup_rpc_entry(hass, entry)

    return await _async_setup_block_entry(hass, entry)


async def _async_setup_block_entry(
    hass: HomeAssistant, entry: ShellyConfigEntry
) -> bool:
    """Set up Shelly block based device from a config entry."""
    options = ConnectionOptions(
        entry.data[CONF_HOST],
        entry.data.get(CONF_USERNAME),
        entry.data.get(CONF_PASSWORD),
        device_mac=entry.unique_id,
    )

    coap_context = await get_coap_context(hass)

    device = await BlockDevice.create(
        async_get_clientsession(hass),
        coap_context,
        options,
    )

    dev_reg = dr_async_get(hass)
    device_entry = None
    if entry.unique_id is not None:
        device_entry = dev_reg.async_get_device(
            connections={(CONNECTION_NETWORK_MAC, format_mac(entry.unique_id))},
        )
    # https://github.com/home-assistant/core/pull/48076
    if device_entry and entry.entry_id not in device_entry.config_entries:
        device_entry = None

    sleep_period = entry.data.get(CONF_SLEEP_PERIOD)
    shelly_entry_data = entry.runtime_data

    # Some old firmware have a wrong sleep period hardcoded value.
    # Following code block will force the right value for affected devices
    if (
        sleep_period == BLOCK_WRONG_SLEEP_PERIOD
        and entry.data["model"] in MODELS_WITH_WRONG_SLEEP_PERIOD
    ):
        LOGGER.warning(
            "Updating stored sleep period for %s: from %s to %s",
            entry.title,
            sleep_period,
            BLOCK_EXPECTED_SLEEP_PERIOD,
        )
        data = {**entry.data}
        data[CONF_SLEEP_PERIOD] = sleep_period = BLOCK_EXPECTED_SLEEP_PERIOD
        hass.config_entries.async_update_entry(entry, data=data)

    if sleep_period == 0:
        # Not a sleeping device, finish setup
        LOGGER.debug("Setting up online block device %s", entry.title)
        try:
            await device.initialize()
            if not device.firmware_supported:
                async_create_issue_unsupported_firmware(hass, entry)
                raise ConfigEntryNotReady
        except (DeviceConnectionError, MacAddressMismatchError) as err:
            raise ConfigEntryNotReady(repr(err)) from err
        except InvalidAuthError as err:
            raise ConfigEntryAuthFailed(repr(err)) from err

        shelly_entry_data.block = ShellyBlockCoordinator(hass, entry, device)
        shelly_entry_data.block.async_setup()
        shelly_entry_data.rest = ShellyRestCoordinator(hass, device, entry)
        await hass.config_entries.async_forward_entry_setups(entry, BLOCK_PLATFORMS)
    elif sleep_period is None or device_entry is None:
        # Need to get sleep info or first time sleeping device setup, wait for device
        LOGGER.debug(
            "Setup for device %s will resume when device is online", entry.title
        )
        shelly_entry_data.block = ShellyBlockCoordinator(hass, entry, device)
        shelly_entry_data.block.async_setup(BLOCK_SLEEPING_PLATFORMS)
    else:
        # Restore sensors for sleeping device
        LOGGER.debug("Setting up offline block device %s", entry.title)
        shelly_entry_data.block = ShellyBlockCoordinator(hass, entry, device)
        shelly_entry_data.block.async_setup()
        await hass.config_entries.async_forward_entry_setups(
            entry, BLOCK_SLEEPING_PLATFORMS
        )

    ir.async_delete_issue(
        hass, DOMAIN, FIRMWARE_UNSUPPORTED_ISSUE_ID.format(unique=entry.unique_id)
    )
    return True


async def _async_setup_rpc_entry(hass: HomeAssistant, entry: ShellyConfigEntry) -> bool:
    """Set up Shelly RPC based device from a config entry."""
    options = ConnectionOptions(
        entry.data[CONF_HOST],
        entry.data.get(CONF_USERNAME),
        entry.data.get(CONF_PASSWORD),
        device_mac=entry.unique_id,
        port=get_http_port(entry.data),
    )

    ws_context = await get_ws_context(hass)

    device = await RpcDevice.create(
        async_get_clientsession(hass),
        ws_context,
        options,
    )

    dev_reg = dr_async_get(hass)
    device_entry = None
    if entry.unique_id is not None:
        device_entry = dev_reg.async_get_device(
            connections={(CONNECTION_NETWORK_MAC, format_mac(entry.unique_id))},
        )
    # https://github.com/home-assistant/core/pull/48076
    if device_entry and entry.entry_id not in device_entry.config_entries:
        device_entry = None

    sleep_period = entry.data.get(CONF_SLEEP_PERIOD)
    shelly_entry_data = entry.runtime_data

    if sleep_period == 0:
        # Not a sleeping device, finish setup
        LOGGER.debug("Setting up online RPC device %s", entry.title)
        try:
            await device.initialize()
            if not device.firmware_supported:
                async_create_issue_unsupported_firmware(hass, entry)
                raise ConfigEntryNotReady
        except (DeviceConnectionError, MacAddressMismatchError) as err:
            raise ConfigEntryNotReady(repr(err)) from err
        except InvalidAuthError as err:
            raise ConfigEntryAuthFailed(repr(err)) from err

        shelly_entry_data.rpc = ShellyRpcCoordinator(hass, entry, device)
        shelly_entry_data.rpc.async_setup()
        shelly_entry_data.rpc_poll = ShellyRpcPollingCoordinator(hass, entry, device)
        await hass.config_entries.async_forward_entry_setups(entry, RPC_PLATFORMS)
    elif sleep_period is None or device_entry is None:
        # Need to get sleep info or first time sleeping device setup, wait for device
        LOGGER.debug(
            "Setup for device %s will resume when device is online", entry.title
        )
        shelly_entry_data.rpc = ShellyRpcCoordinator(hass, entry, device)
        shelly_entry_data.rpc.async_setup(RPC_SLEEPING_PLATFORMS)
    else:
        # Restore sensors for sleeping device
        LOGGER.debug("Setting up offline RPC device %s", entry.title)
        shelly_entry_data.rpc = ShellyRpcCoordinator(hass, entry, device)
        shelly_entry_data.rpc.async_setup()
        await hass.config_entries.async_forward_entry_setups(
            entry, RPC_SLEEPING_PLATFORMS
        )

    ir.async_delete_issue(
        hass, DOMAIN, FIRMWARE_UNSUPPORTED_ISSUE_ID.format(unique=entry.unique_id)
    )
    return True


async def async_unload_entry(hass: HomeAssistant, entry: ShellyConfigEntry) -> bool:
    """Unload a config entry."""
    shelly_entry_data = entry.runtime_data

    platforms = RPC_SLEEPING_PLATFORMS
    if not entry.data.get(CONF_SLEEP_PERIOD):
        platforms = RPC_PLATFORMS

    if get_device_entry_gen(entry) in RPC_GENERATIONS:
        if unload_ok := await hass.config_entries.async_unload_platforms(
            entry, platforms
        ):
            if shelly_entry_data.rpc:
                with contextlib.suppress(DeviceConnectionError):
                    # If the device is restarting or has gone offline before
                    # the ping/pong timeout happens, the shutdown command
                    # will fail, but we don't care since we are unloading
                    # and if we setup again, we will fix anything that is
                    # in an inconsistent state at that time.
                    await shelly_entry_data.rpc.shutdown()

        return unload_ok

    # delete push update issue if it exists
    LOGGER.debug(
        "Deleting issue %s", PUSH_UPDATE_ISSUE_ID.format(unique=entry.unique_id)
    )
    ir.async_delete_issue(
        hass, DOMAIN, PUSH_UPDATE_ISSUE_ID.format(unique=entry.unique_id)
    )

    platforms = BLOCK_SLEEPING_PLATFORMS

    if not entry.data.get(CONF_SLEEP_PERIOD):
        shelly_entry_data.rest = None
        platforms = BLOCK_PLATFORMS

    if unload_ok := await hass.config_entries.async_unload_platforms(entry, platforms):
        if shelly_entry_data.block:
            shelly_entry_data.block.shutdown()

    return unload_ok