"""Utilities used by insteon component."""

from __future__ import annotations

import asyncio
from collections.abc import Callable
import logging
from typing import TYPE_CHECKING, Any

from pyinsteon import devices
from pyinsteon.address import Address
from pyinsteon.constants import ALDBStatus, DeviceAction
from pyinsteon.device_types.device_base import Device
from pyinsteon.events import OFF_EVENT, OFF_FAST_EVENT, ON_EVENT, ON_FAST_EVENT, Event
from pyinsteon.managers.link_manager import (
    async_enter_linking_mode,
    async_enter_unlinking_mode,
)
from pyinsteon.managers.scene_manager import (
    async_trigger_scene_off,
    async_trigger_scene_on,
)
from pyinsteon.managers.x10_manager import (
    async_x10_all_lights_off,
    async_x10_all_lights_on,
    async_x10_all_units_off,
)
from pyinsteon.x10_address import create as create_x10_address
from serial.tools import list_ports

from homeassistant.components import usb
from homeassistant.const import (
    CONF_ADDRESS,
    CONF_ENTITY_ID,
    CONF_PLATFORM,
    ENTITY_MATCH_ALL,
    Platform,
)
from homeassistant.core import HomeAssistant, ServiceCall, callback
from homeassistant.helpers import device_registry as dr
from homeassistant.helpers.dispatcher import (
    async_dispatcher_connect,
    async_dispatcher_send,
    dispatcher_send,
)
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback

from .const import (
    CONF_CAT,
    CONF_DIM_STEPS,
    CONF_HOUSECODE,
    CONF_SUBCAT,
    CONF_UNITCODE,
    DOMAIN,
    EVENT_CONF_BUTTON,
    EVENT_GROUP_OFF,
    EVENT_GROUP_OFF_FAST,
    EVENT_GROUP_ON,
    EVENT_GROUP_ON_FAST,
    SIGNAL_ADD_DEFAULT_LINKS,
    SIGNAL_ADD_DEVICE_OVERRIDE,
    SIGNAL_ADD_ENTITIES,
    SIGNAL_ADD_X10_DEVICE,
    SIGNAL_LOAD_ALDB,
    SIGNAL_PRINT_ALDB,
    SIGNAL_REMOVE_DEVICE_OVERRIDE,
    SIGNAL_REMOVE_ENTITY,
    SIGNAL_REMOVE_HA_DEVICE,
    SIGNAL_REMOVE_INSTEON_DEVICE,
    SIGNAL_REMOVE_X10_DEVICE,
    SIGNAL_SAVE_DEVICES,
    SRV_ADD_ALL_LINK,
    SRV_ADD_DEFAULT_LINKS,
    SRV_ALL_LINK_GROUP,
    SRV_ALL_LINK_MODE,
    SRV_CONTROLLER,
    SRV_DEL_ALL_LINK,
    SRV_HOUSECODE,
    SRV_LOAD_ALDB,
    SRV_LOAD_DB_RELOAD,
    SRV_PRINT_ALDB,
    SRV_PRINT_IM_ALDB,
    SRV_SCENE_OFF,
    SRV_SCENE_ON,
    SRV_X10_ALL_LIGHTS_OFF,
    SRV_X10_ALL_LIGHTS_ON,
    SRV_X10_ALL_UNITS_OFF,
)
from .ipdb import get_device_platform_groups, get_device_platforms
from .schemas import (
    ADD_ALL_LINK_SCHEMA,
    ADD_DEFAULT_LINKS_SCHEMA,
    DEL_ALL_LINK_SCHEMA,
    LOAD_ALDB_SCHEMA,
    PRINT_ALDB_SCHEMA,
    TRIGGER_SCENE_SCHEMA,
    X10_HOUSECODE_SCHEMA,
)

if TYPE_CHECKING:
    from .entity import InsteonEntity

_LOGGER = logging.getLogger(__name__)


def _register_event(event: Event, listener: Callable) -> None:
    """Register the events raised by a device."""
    _LOGGER.debug(
        "Registering on/off event for %s %d %s",
        str(event.address),
        event.group,
        event.name,
    )
    event.subscribe(listener, force_strong_ref=True)


def add_insteon_events(hass: HomeAssistant, device: Device) -> None:
    """Register Insteon device events."""

    @callback
    def async_fire_insteon_event(
        name: str, address: Address, group: int, button: str | None = None
    ):
        # Firing an event when a button is pressed.
        if button and button[-2] == "_":
            button_id = button[-1].lower()
        else:
            button_id = None

        schema = {CONF_ADDRESS: address, "group": group}
        if button_id:
            schema[EVENT_CONF_BUTTON] = button_id
        if name == ON_EVENT:
            event = EVENT_GROUP_ON
        elif name == OFF_EVENT:
            event = EVENT_GROUP_OFF
        elif name == ON_FAST_EVENT:
            event = EVENT_GROUP_ON_FAST
        elif name == OFF_FAST_EVENT:
            event = EVENT_GROUP_OFF_FAST
        else:
            event = f"insteon.{name}"
        _LOGGER.debug("Firing event %s with %s", event, schema)
        hass.bus.async_fire(event, schema)

    if str(device.address).startswith("X10"):
        return

    for name_or_group, event in device.events.items():
        if isinstance(name_or_group, int):
            for event in device.events[name_or_group].values():
                _register_event(event, async_fire_insteon_event)
        else:
            _register_event(event, async_fire_insteon_event)


def register_new_device_callback(hass):
    """Register callback for new Insteon device."""

    @callback
    def async_new_insteon_device(address, action: DeviceAction):
        """Detect device from transport to be delegated to platform."""
        if action == DeviceAction.ADDED:
            hass.async_create_task(async_create_new_entities(address))

    async def async_create_new_entities(address):
        _LOGGER.debug(
            "Adding new INSTEON device to Home Assistant with address %s", address
        )
        await devices.async_save(workdir=hass.config.config_dir)
        device = devices[address]
        await device.async_status()
        platforms = get_device_platforms(device)
        for platform in platforms:
            groups = get_device_platform_groups(device, platform)
            signal = f"{SIGNAL_ADD_ENTITIES}_{platform}"
            dispatcher_send(hass, signal, {"address": device.address, "groups": groups})
        add_insteon_events(hass, device)

    devices.subscribe(async_new_insteon_device, force_strong_ref=True)


@callback
def async_register_services(hass):  # noqa: C901
    """Register services used by insteon component."""

    save_lock = asyncio.Lock()

    async def async_srv_add_all_link(service: ServiceCall) -> None:
        """Add an INSTEON All-Link between two devices."""
        group = service.data[SRV_ALL_LINK_GROUP]
        mode = service.data[SRV_ALL_LINK_MODE]
        link_mode = mode.lower() == SRV_CONTROLLER
        await async_enter_linking_mode(link_mode, group)

    async def async_srv_del_all_link(service: ServiceCall) -> None:
        """Delete an INSTEON All-Link between two devices."""
        group = service.data.get(SRV_ALL_LINK_GROUP)
        await async_enter_unlinking_mode(group)

    async def async_srv_load_aldb(service: ServiceCall) -> None:
        """Load the device All-Link database."""
        entity_id = service.data[CONF_ENTITY_ID]
        reload = service.data[SRV_LOAD_DB_RELOAD]
        if entity_id.lower() == ENTITY_MATCH_ALL:
            await async_srv_load_aldb_all(reload)
        else:
            signal = f"{entity_id}_{SIGNAL_LOAD_ALDB}"
            async_dispatcher_send(hass, signal, reload)

    async def async_srv_load_aldb_all(reload):
        """Load the All-Link database for all devices."""
        # Cannot be done concurrently due to issues with the underlying protocol.
        for address in devices:
            device = devices[address]
            if device != devices.modem and device.cat != 0x03:
                await device.aldb.async_load(refresh=reload)
                await async_srv_save_devices()

    async def async_srv_save_devices():
        """Write the Insteon device configuration to file."""
        async with save_lock:
            _LOGGER.debug("Saving Insteon devices")
            await devices.async_save(hass.config.config_dir)

    def print_aldb(service: ServiceCall) -> None:
        """Print the All-Link Database for a device."""
        # For now this sends logs to the log file.
        # Future direction is to create an INSTEON control panel.
        entity_id = service.data[CONF_ENTITY_ID]
        signal = f"{entity_id}_{SIGNAL_PRINT_ALDB}"
        dispatcher_send(hass, signal)

    def print_im_aldb(service: ServiceCall) -> None:
        """Print the All-Link Database for a device."""
        # For now this sends logs to the log file.
        # Future direction is to create an INSTEON control panel.
        print_aldb_to_log(devices.modem.aldb)

    async def async_srv_x10_all_units_off(service: ServiceCall) -> None:
        """Send the X10 All Units Off command."""
        housecode = service.data.get(SRV_HOUSECODE)
        await async_x10_all_units_off(housecode)

    async def async_srv_x10_all_lights_off(service: ServiceCall) -> None:
        """Send the X10 All Lights Off command."""
        housecode = service.data.get(SRV_HOUSECODE)
        await async_x10_all_lights_off(housecode)

    async def async_srv_x10_all_lights_on(service: ServiceCall) -> None:
        """Send the X10 All Lights On command."""
        housecode = service.data.get(SRV_HOUSECODE)
        await async_x10_all_lights_on(housecode)

    async def async_srv_scene_on(service: ServiceCall) -> None:
        """Trigger an INSTEON scene ON."""
        group = service.data.get(SRV_ALL_LINK_GROUP)
        await async_trigger_scene_on(group)

    async def async_srv_scene_off(service: ServiceCall) -> None:
        """Trigger an INSTEON scene ON."""
        group = service.data.get(SRV_ALL_LINK_GROUP)
        await async_trigger_scene_off(group)

    @callback
    def async_add_default_links(service: ServiceCall) -> None:
        """Add the default All-Link entries to a device."""
        entity_id = service.data[CONF_ENTITY_ID]
        signal = f"{entity_id}_{SIGNAL_ADD_DEFAULT_LINKS}"
        async_dispatcher_send(hass, signal)

    async def async_add_device_override(override):
        """Remove an Insten device and associated entities."""
        address = Address(override[CONF_ADDRESS])
        await async_remove_ha_device(address)
        devices.set_id(address, override[CONF_CAT], override[CONF_SUBCAT], 0)
        await async_srv_save_devices()

    async def async_remove_device_override(address):
        """Remove an Insten device and associated entities."""
        address = Address(address)
        await async_remove_ha_device(address)
        devices.set_id(address, None, None, None)
        await devices.async_identify_device(address)
        await async_srv_save_devices()

    @callback
    def async_add_x10_device(x10_config):
        """Add X10 device."""
        housecode = x10_config[CONF_HOUSECODE]
        unitcode = x10_config[CONF_UNITCODE]
        platform = x10_config[CONF_PLATFORM]
        steps = x10_config.get(CONF_DIM_STEPS, 22)
        x10_type = "on_off"
        if platform == "light":
            x10_type = "dimmable"
        elif platform == "binary_sensor":
            x10_type = "sensor"
        _LOGGER.debug(
            "Adding X10 device to Insteon: %s %d %s", housecode, unitcode, x10_type
        )
        # This must be run in the event loop
        devices.add_x10_device(housecode, unitcode, x10_type, steps)

    async def async_remove_x10_device(housecode, unitcode):
        """Remove an X10 device and associated entities."""
        address = create_x10_address(housecode, unitcode)
        devices.pop(address)
        await async_remove_ha_device(address)

    async def async_remove_ha_device(address: Address, remove_all_refs: bool = False):
        """Remove the device and all entities from hass."""
        signal = f"{address.id}_{SIGNAL_REMOVE_ENTITY}"
        async_dispatcher_send(hass, signal)
        dev_registry = dr.async_get(hass)
        device = dev_registry.async_get_device(identifiers={(DOMAIN, str(address))})
        if device:
            dev_registry.async_remove_device(device.id)

    async def async_remove_insteon_device(
        address: Address, remove_all_refs: bool = False
    ):
        """Remove the underlying Insteon device from the network."""
        await devices.async_remove_device(
            address=address, force=False, remove_all_refs=remove_all_refs
        )
        await async_srv_save_devices()

    hass.services.async_register(
        DOMAIN, SRV_ADD_ALL_LINK, async_srv_add_all_link, schema=ADD_ALL_LINK_SCHEMA
    )
    hass.services.async_register(
        DOMAIN, SRV_DEL_ALL_LINK, async_srv_del_all_link, schema=DEL_ALL_LINK_SCHEMA
    )
    hass.services.async_register(
        DOMAIN, SRV_LOAD_ALDB, async_srv_load_aldb, schema=LOAD_ALDB_SCHEMA
    )
    hass.services.async_register(
        DOMAIN, SRV_PRINT_ALDB, print_aldb, schema=PRINT_ALDB_SCHEMA
    )
    hass.services.async_register(DOMAIN, SRV_PRINT_IM_ALDB, print_im_aldb, schema=None)
    hass.services.async_register(
        DOMAIN,
        SRV_X10_ALL_UNITS_OFF,
        async_srv_x10_all_units_off,
        schema=X10_HOUSECODE_SCHEMA,
    )
    hass.services.async_register(
        DOMAIN,
        SRV_X10_ALL_LIGHTS_OFF,
        async_srv_x10_all_lights_off,
        schema=X10_HOUSECODE_SCHEMA,
    )
    hass.services.async_register(
        DOMAIN,
        SRV_X10_ALL_LIGHTS_ON,
        async_srv_x10_all_lights_on,
        schema=X10_HOUSECODE_SCHEMA,
    )
    hass.services.async_register(
        DOMAIN, SRV_SCENE_ON, async_srv_scene_on, schema=TRIGGER_SCENE_SCHEMA
    )
    hass.services.async_register(
        DOMAIN, SRV_SCENE_OFF, async_srv_scene_off, schema=TRIGGER_SCENE_SCHEMA
    )

    hass.services.async_register(
        DOMAIN,
        SRV_ADD_DEFAULT_LINKS,
        async_add_default_links,
        schema=ADD_DEFAULT_LINKS_SCHEMA,
    )
    async_dispatcher_connect(hass, SIGNAL_SAVE_DEVICES, async_srv_save_devices)
    async_dispatcher_connect(
        hass, SIGNAL_ADD_DEVICE_OVERRIDE, async_add_device_override
    )
    async_dispatcher_connect(
        hass, SIGNAL_REMOVE_DEVICE_OVERRIDE, async_remove_device_override
    )
    async_dispatcher_connect(hass, SIGNAL_ADD_X10_DEVICE, async_add_x10_device)
    async_dispatcher_connect(hass, SIGNAL_REMOVE_X10_DEVICE, async_remove_x10_device)
    async_dispatcher_connect(hass, SIGNAL_REMOVE_HA_DEVICE, async_remove_ha_device)
    async_dispatcher_connect(
        hass, SIGNAL_REMOVE_INSTEON_DEVICE, async_remove_insteon_device
    )
    _LOGGER.debug("Insteon Services registered")


def print_aldb_to_log(aldb):
    """Print the All-Link Database to the log file."""
    logger = logging.getLogger(f"{__name__}.links")
    logger.info("%s ALDB load status is %s", aldb.address, aldb.status.name)
    if aldb.status not in [ALDBStatus.LOADED, ALDBStatus.PARTIAL]:
        _LOGGER.warning("All-Link database not loaded")

    logger.info("RecID In Use Mode HWM Group Address  Data 1 Data 2 Data 3")
    logger.info("----- ------ ---- --- ----- -------- ------ ------ ------")
    for mem_addr in aldb:
        rec = aldb[mem_addr]
        # For now we write this to the log
        # Roadmap is to create a configuration panel
        in_use = "Y" if rec.is_in_use else "N"
        mode = "C" if rec.is_controller else "R"
        hwm = "Y" if rec.is_high_water_mark else "N"
        log_msg = (
            f" {rec.mem_addr:04x}    {in_use:s}     {mode:s}   {hwm:s}    "
            f"{rec.group:3d} {rec.target!s:s}   {rec.data1:3d}   "
            f"{rec.data2:3d}   {rec.data3:3d}"
        )
        logger.info(log_msg)


@callback
def async_add_insteon_entities(
    hass: HomeAssistant,
    platform: Platform,
    entity_type: type[InsteonEntity],
    async_add_entities: AddConfigEntryEntitiesCallback,
    discovery_info: dict[str, Any],
) -> None:
    """Add an Insteon group to a platform."""
    address = discovery_info["address"]
    device = devices[address]
    new_entities = [
        entity_type(device=device, group=group) for group in discovery_info["groups"]
    ]
    async_add_entities(new_entities)


@callback
def async_add_insteon_devices(
    hass: HomeAssistant,
    platform: Platform,
    entity_type: type[InsteonEntity],
    async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
    """Add all entities to a platform."""
    for address in devices:
        device = devices[address]
        groups = get_device_platform_groups(device, platform)
        discovery_info = {"address": address, "groups": groups}
        async_add_insteon_entities(
            hass, platform, entity_type, async_add_entities, discovery_info
        )


def get_usb_ports() -> dict[str, str]:
    """Return a dict of USB ports and their friendly names."""
    ports = list_ports.comports()
    port_descriptions = {}
    for port in ports:
        vid: str | None = None
        pid: str | None = None
        if port.vid is not None and port.pid is not None:
            usb_device = usb.usb_device_from_port(port)
            vid = usb_device.vid
            pid = usb_device.pid
        dev_path = usb.get_serial_by_id(port.device)
        human_name = usb.human_readable_device_name(
            dev_path,
            port.serial_number,
            port.manufacturer,
            port.description,
            vid,
            pid,
        )
        port_descriptions[dev_path] = human_name
    return port_descriptions


async def async_get_usb_ports(hass: HomeAssistant) -> dict[str, str]:
    """Return a dict of USB ports and their friendly names."""
    return await hass.async_add_executor_job(get_usb_ports)


def compute_device_name(ha_device) -> str:
    """Return the HA device name."""
    return ha_device.name_by_user if ha_device.name_by_user else ha_device.name


async def async_device_name(dev_registry: dr.DeviceRegistry, address: Address) -> str:
    """Get the Insteon device name from a device registry id."""
    ha_device = dev_registry.async_get_device(identifiers={(DOMAIN, str(address))})
    if not ha_device:
        if device := devices[address]:
            return f"{device.description} ({device.model})"
        return ""
    return compute_device_name(ha_device)
