"""
Simple platform to control LOCALLY Tuya switch devices.

Sample config yaml

switch:
  - platform: localtuya
    host: 192.168.0.1
    local_key: 1234567891234567
    device_id: 12345678912345671234
    name: tuya_01
    friendly_name: tuya_01
    protocol_version: 3.3
    switches:
      sw01:
        name: main_plug
        friendly_name: Main Plug
        id: 1
        current: 18
        current_consumption: 19
        voltage: 20
      sw02:
        name: usb_plug
        friendly_name: USB Plug
        id: 7
"""
import logging
from time import time, sleep
from threading import Lock

import voluptuous as vol

from homeassistant.components.switch import (
    SwitchEntity,
    PLATFORM_SCHEMA,
)
from homeassistant.const import (
    CONF_ID,
    CONF_SWITCHES,
    CONF_FRIENDLY_NAME,
    CONF_NAME,
)
import homeassistant.helpers.config_validation as cv

from . import BASE_PLATFORM_SCHEMA, prepare_setup_entities, import_from_yaml
from .const import (
    ATTR_CURRENT,
    ATTR_CURRENT_CONSUMPTION,
    ATTR_VOLTAGE,
    CONF_CURRENT,
    CONF_CURRENT_CONSUMPTION,
    CONF_VOLTAGE,
)
from .pytuya import TuyaDevice

_LOGGER = logging.getLogger(__name__)

PLATFORM = "switch"

DEFAULT_ID = "1"

# TODO: This will eventully merge with flow_schema
SWITCH_SCHEMA = vol.Schema(
    {
        vol.Optional(CONF_ID, default=DEFAULT_ID): cv.string,
        vol.Optional(CONF_NAME): cv.string,  # Deprecated: not used
        vol.Required(CONF_FRIENDLY_NAME): cv.string,
        vol.Optional(CONF_CURRENT, default="-1"): cv.string,
        vol.Optional(CONF_CURRENT_CONSUMPTION, default="-1"): cv.string,
        vol.Optional(CONF_VOLTAGE, default="-1"): cv.string,
    }
)

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(BASE_PLATFORM_SCHEMA).extend(
    {
        vol.Optional(CONF_CURRENT, default="-1"): cv.string,
        vol.Optional(CONF_CURRENT_CONSUMPTION, default="-1"): cv.string,
        vol.Optional(CONF_VOLTAGE, default="-1"): cv.string,
        vol.Optional(CONF_SWITCHES, default={}): vol.Schema({cv.slug: SWITCH_SCHEMA}),
    }
)


def flow_schema(dps):
    """Return schema used in config flow."""
    return {
        vol.Optional(CONF_CURRENT): vol.In(dps),
        vol.Optional(CONF_CURRENT_CONSUMPTION): vol.In(dps),
        vol.Optional(CONF_VOLTAGE): vol.In(dps),
    }


async def async_setup_entry(hass, config_entry, async_add_entities):
    """Setup a Tuya switch based on a config entry."""
    device, entities_to_setup = prepare_setup_entities(
        config_entry, PLATFORM
    )
    if not entities_to_setup:
        return

    switches = []
    for device_config in entities_to_setup:
        switches.append(
            LocaltuyaSwitch(
                TuyaCache(device),
                device_config[CONF_FRIENDLY_NAME],
                device_config[CONF_ID],
                device_config.get(CONF_CURRENT),
                device_config.get(CONF_CURRENT_CONSUMPTION),
                device_config.get(CONF_VOLTAGE),
            )
        )

    async_add_entities(switches, True)


def setup_platform(hass, config, add_devices, discovery_info=None):
    """Set up of the Tuya switch."""
    return import_from_yaml(hass, config, PLATFORM)


class TuyaCache:
    """Cache wrapper for pytuya.TuyaDevice"""

    def __init__(self, device):
        """Initialize the cache."""
        self._cached_status = ""
        self._cached_status_time = 0
        self._device = device
        self._lock = Lock()

    @property
    def unique_id(self):
        """Return unique device identifier."""
        return self._device.id

    def __get_status(self):
        for i in range(5):
            try:
                status = self._device.status()
                return status
            except Exception:
                print(
                    "Failed to update status of device [{}]".format(
                        self._device.address
                    )
                )
                sleep(1.0)
                if i + 1 == 3:
                    _LOGGER.error(
                        "Failed to update status of device %s", self._device.address
                    )
                    #                    return None
                    raise ConnectionError("Failed to update status .")

    def set_dps(self, state, dps_index):
        """Change the Tuya switch status and clear the cache."""
        self._cached_status = ""
        self._cached_status_time = 0
        for i in range(5):
            try:
                return self._device.set_dps(state, dps_index)
            except Exception:
                print(
                    "Failed to set status of device [{}]".format(self._device.address)
                )
                if i + 1 == 3:
                    _LOGGER.error(
                        "Failed to set status of device %s", self._device.address
                    )
                    return

    #                    raise ConnectionError("Failed to set status.")

    def status(self):
        """Get state of Tuya switch and cache the results."""
        self._lock.acquire()
        try:
            now = time()
            if not self._cached_status or now - self._cached_status_time > 15:
                sleep(0.5)
                self._cached_status = self.__get_status()
                self._cached_status_time = time()
            return self._cached_status
        finally:
            self._lock.release()

class LocaltuyaSwitch(SwitchEntity):
    """Representation of a Tuya switch."""

    def __init__(
        self,
        device,
        friendly_name,
        switchid,
        attr_current,
        attr_consumption,
        attr_voltage,
    ):
        """Initialize the Tuya switch."""
        self._device = device
        self._name = friendly_name
        self._available = False
        self._switch_id = switchid
        self._attr_current = attr_current
        self._attr_consumption = attr_consumption
        self._attr_voltage = attr_voltage
        self._status = None
        self._state = None
        print(
            "Initialized tuya switch [{}] with switch status [{}] and state [{}]".format(
                self._name, self._status, self._state
            )
        )

    @property
    def name(self):
        """Get name of Tuya switch."""
        return self._name

    @property
    def unique_id(self):
        """Return unique device identifier."""
        return f"local_{self._device.unique_id}_{self._switch_id}"

    @property
    def available(self):
        """Return if device is available or not."""
        return self._available

    @property
    def is_on(self):
        """Check if Tuya switch is on."""
        return self._state

    @property
    def device_state_attributes(self):
        attrs = {}
        if self._attr_current:
            attrs[ATTR_CURRENT] = self._status["dps"][self._attr_current]
        if self._attr_consumption:
            attrs[ATTR_CURRENT_CONSUMPTION] = (
                self._status["dps"][self._attr_consumption] / 10
            )
        if self._attr_voltage:
            attrs[ATTR_VOLTAGE] = self._status["dps"][self._attr_voltage] / 10
        return attrs

    def turn_on(self, **kwargs):
        """Turn Tuya switch on."""
        self._device.set_dps(True, self._switch_id)

    def turn_off(self, **kwargs):
        """Turn Tuya switch off."""
        self._device.set_dps(False, self._switch_id)

    def update(self):
        """Get state of Tuya switch."""
        try:
            self._status = self._device.status()
            self._state = self._status["dps"][self._switch_id]
        except Exception:
            self._available = False
        else:
            self._available = True