"""Locks on Zigbee Home Automation networks."""
import logging

from zigpy.zcl.foundation import Status
from homeassistant.core import callback
from homeassistant.components.lock import (
    DOMAIN, STATE_UNLOCKED, STATE_LOCKED, LockDevice)
from homeassistant.helpers.dispatcher import async_dispatcher_connect
from .core.const import (
    DATA_ZHA, DATA_ZHA_DISPATCHERS, ZHA_DISCOVERY_NEW, DOORLOCK_CHANNEL,
    SIGNAL_ATTR_UPDATED
)
from .entity import ZhaEntity

_LOGGER = logging.getLogger(__name__)

""" The first state is Zigbee 'Not fully locked' """

STATE_LIST = [
    STATE_UNLOCKED,
    STATE_LOCKED,
    STATE_UNLOCKED
]

VALUE_TO_STATE = {i: state for i, state in enumerate(STATE_LIST)}


async def async_setup_platform(hass, config, async_add_entities,
                               discovery_info=None):
    """Old way of setting up Zigbee Home Automation locks."""
    pass


async def async_setup_entry(hass, config_entry, async_add_entities):
    """Set up the Zigbee Home Automation Door Lock from config entry."""
    async def async_discover(discovery_info):
        await _async_setup_entities(hass, config_entry, async_add_entities,
                                    [discovery_info])

    unsub = async_dispatcher_connect(
        hass, ZHA_DISCOVERY_NEW.format(DOMAIN), async_discover)
    hass.data[DATA_ZHA][DATA_ZHA_DISPATCHERS].append(unsub)

    locks = hass.data.get(DATA_ZHA, {}).get(DOMAIN)
    if locks is not None:
        await _async_setup_entities(hass, config_entry, async_add_entities,
                                    locks.values())
        del hass.data[DATA_ZHA][DOMAIN]


async def _async_setup_entities(hass, config_entry, async_add_entities,
                                discovery_infos):
    """Set up the ZHA locks."""
    entities = []
    for discovery_info in discovery_infos:
        entities.append(ZhaDoorLock(**discovery_info))

    async_add_entities(entities, update_before_add=True)


class ZhaDoorLock(ZhaEntity, LockDevice):
    """Representation of a ZHA lock."""

    _domain = DOMAIN

    def __init__(self, unique_id, zha_device, channels, **kwargs):
        """Init this sensor."""
        super().__init__(unique_id, zha_device, channels, **kwargs)
        self._doorlock_channel = self.cluster_channels.get(DOORLOCK_CHANNEL)

    async def async_added_to_hass(self):
        """Run when about to be added to hass."""
        await super().async_added_to_hass()
        await self.async_accept_signal(
            self._doorlock_channel, SIGNAL_ATTR_UPDATED, self.async_set_state)

    @callback
    def async_restore_last_state(self, last_state):
        """Restore previous state."""
        self._state = VALUE_TO_STATE.get(last_state.state, last_state.state)

    @property
    def is_locked(self) -> bool:
        """Return true if entity is locked."""
        if self._state is None:
            return False
        return self._state == STATE_LOCKED

    @property
    def device_state_attributes(self):
        """Return state attributes."""
        return self.state_attributes

    async def async_lock(self, **kwargs):
        """Lock the lock."""
        result = await self._doorlock_channel.lock_door()
        if not isinstance(result, list) or result[0] is not Status.SUCCESS:
            self.error("Error with lock_door: %s", result)
            return
        self.async_schedule_update_ha_state()

    async def async_unlock(self, **kwargs):
        """Unlock the lock."""
        result = await self._doorlock_channel.unlock_door()
        if not isinstance(result, list) or result[0] is not Status.SUCCESS:
            self.error("Error with unlock_door: %s", result)
            return
        self.async_schedule_update_ha_state()

    async def async_update(self):
        """Attempt to retrieve state from the lock."""
        await super().async_update()
        await self.async_get_state()

    def async_set_state(self, state):
        """Handle state update from channel."""
        self._state = VALUE_TO_STATE.get(state, self._state)
        self.async_schedule_update_ha_state()

    async def async_get_state(self, from_cache=True):
        """Attempt to retrieve state from the lock."""
        if self._doorlock_channel:
            state = await self._doorlock_channel.get_attribute_value(
                'lock_state', from_cache=from_cache)
            if state is not None:
                self._state = VALUE_TO_STATE.get(state, self._state)

    async def refresh(self, time):
        """Call async_get_state at an interval."""
        await self.async_get_state(from_cache=False)