"""Support for Honeywell (US) Total Connect Comfort climate systems."""
import datetime
import logging
from typing import Any, Dict, Optional, List

import requests
import voluptuous as vol
import somecomfort

from homeassistant.components.climate import ClimateDevice, PLATFORM_SCHEMA
from homeassistant.components.climate.const import (
    ATTR_TARGET_TEMP_HIGH,
    ATTR_TARGET_TEMP_LOW,
    FAN_AUTO,
    FAN_DIFFUSE,
    FAN_ON,
    SUPPORT_AUX_HEAT,
    SUPPORT_FAN_MODE,
    SUPPORT_PRESET_MODE,
    SUPPORT_TARGET_HUMIDITY,
    SUPPORT_TARGET_TEMPERATURE,
    SUPPORT_TARGET_TEMPERATURE_RANGE,
    CURRENT_HVAC_COOL,
    CURRENT_HVAC_HEAT,
    CURRENT_HVAC_IDLE,
    CURRENT_HVAC_FAN,
    HVAC_MODE_OFF,
    HVAC_MODE_HEAT,
    HVAC_MODE_COOL,
    HVAC_MODE_HEAT_COOL,
    PRESET_AWAY,
    PRESET_NONE,
)
from homeassistant.const import (
    CONF_PASSWORD,
    CONF_USERNAME,
    TEMP_CELSIUS,
    TEMP_FAHRENHEIT,
    ATTR_TEMPERATURE,
    CONF_REGION,
)
import homeassistant.helpers.config_validation as cv

_LOGGER = logging.getLogger(__name__)

ATTR_FAN_ACTION = "fan_action"

CONF_COOL_AWAY_TEMPERATURE = "away_cool_temperature"
CONF_HEAT_AWAY_TEMPERATURE = "away_heat_temperature"

DEFAULT_COOL_AWAY_TEMPERATURE = 88
DEFAULT_HEAT_AWAY_TEMPERATURE = 61
DEFAULT_REGION = "eu"
REGIONS = ["eu", "us"]

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
    {
        vol.Required(CONF_USERNAME): cv.string,
        vol.Required(CONF_PASSWORD): cv.string,
        vol.Optional(
            CONF_COOL_AWAY_TEMPERATURE, default=DEFAULT_COOL_AWAY_TEMPERATURE
        ): vol.Coerce(int),
        vol.Optional(
            CONF_HEAT_AWAY_TEMPERATURE, default=DEFAULT_HEAT_AWAY_TEMPERATURE
        ): vol.Coerce(int),
        vol.Optional(CONF_REGION, default=DEFAULT_REGION): vol.In(REGIONS),
    }
)

HVAC_MODE_TO_HW_MODE = {
    "SwitchOffAllowed": {HVAC_MODE_OFF: "off"},
    "SwitchAutoAllowed": {HVAC_MODE_HEAT_COOL: "auto"},
    "SwitchCoolAllowed": {HVAC_MODE_COOL: "cool"},
    "SwitchHeatAllowed": {HVAC_MODE_HEAT: "heat"},
}
HW_MODE_TO_HVAC_MODE = {
    "off": HVAC_MODE_OFF,
    "emheat": HVAC_MODE_HEAT,
    "heat": HVAC_MODE_HEAT,
    "cool": HVAC_MODE_COOL,
    "auto": HVAC_MODE_HEAT_COOL,
}
HW_MODE_TO_HA_HVAC_ACTION = {
    "off": CURRENT_HVAC_IDLE,
    "fan": CURRENT_HVAC_FAN,
    "heat": CURRENT_HVAC_HEAT,
    "cool": CURRENT_HVAC_COOL,
}
FAN_MODE_TO_HW = {
    "fanModeOnAllowed": {FAN_ON: "on"},
    "fanModeAutoAllowed": {FAN_AUTO: "auto"},
    "fanModeCirculateAllowed": {FAN_DIFFUSE: "circulate"},
}
HW_FAN_MODE_TO_HA = {
    "on": FAN_ON,
    "auto": FAN_AUTO,
    "circulate": FAN_DIFFUSE,
    "follow schedule": FAN_AUTO,
}


def setup_platform(hass, config, add_entities, discovery_info=None):
    """Set up the Honeywell thermostat."""
    username = config.get(CONF_USERNAME)
    password = config.get(CONF_PASSWORD)

    if config.get(CONF_REGION) == "us":
        try:
            client = somecomfort.SomeComfort(username, password)
        except somecomfort.AuthError:
            _LOGGER.error("Failed to login to honeywell account %s", username)
            return
        except somecomfort.SomeComfortError:
            _LOGGER.error(
                "Failed to initialize the Honeywell client: "
                "Check your configuration (username, password), "
                "or maybe you have exceeded the API rate limit?"
            )
            return

        dev_id = config.get("thermostat")
        loc_id = config.get("location")
        cool_away_temp = config.get(CONF_COOL_AWAY_TEMPERATURE)
        heat_away_temp = config.get(CONF_HEAT_AWAY_TEMPERATURE)

        add_entities(
            [
                HoneywellUSThermostat(
                    client, device, cool_away_temp, heat_away_temp, username, password
                )
                for location in client.locations_by_id.values()
                for device in location.devices_by_id.values()
                if (
                    (not loc_id or location.locationid == loc_id)
                    and (not dev_id or device.deviceid == dev_id)
                )
            ]
        )
        return

    _LOGGER.warning(
        "The honeywell component has been deprecated for EU (i.e. non-US) "
        "systems. For EU-based systems, use the evohome component, "
        "see: https://home-assistant.io/components/evohome"
    )


class HoneywellUSThermostat(ClimateDevice):
    """Representation of a Honeywell US Thermostat."""

    def __init__(
        self, client, device, cool_away_temp, heat_away_temp, username, password
    ):
        """Initialize the thermostat."""
        self._client = client
        self._device = device
        self._cool_away_temp = cool_away_temp
        self._heat_away_temp = heat_away_temp
        self._away = False
        self._username = username
        self._password = password

        _LOGGER.debug(
            # noqa; pylint: disable=protected-access
            "latestData = %s ",
            device._data,
        )

        # not all honeywell HVACs support all modes
        mappings = [v for k, v in HVAC_MODE_TO_HW_MODE.items() if device.raw_ui_data[k]]
        self._hvac_mode_map = {k: v for d in mappings for k, v in d.items()}

        self._supported_features = (
            SUPPORT_PRESET_MODE
            | SUPPORT_TARGET_TEMPERATURE
            | SUPPORT_TARGET_TEMPERATURE_RANGE
        )

        # noqa; pylint: disable=protected-access
        if device._data["canControlHumidification"]:
            self._supported_features |= SUPPORT_TARGET_HUMIDITY

        if device.raw_ui_data["SwitchEmergencyHeatAllowed"]:
            self._supported_features |= SUPPORT_AUX_HEAT

        if not device._data["hasFan"]:  # pylint: disable=protected-access
            return

        # not all honeywell fans support all modes
        mappings = [v for k, v in FAN_MODE_TO_HW.items() if device.raw_fan_data[k]]
        self._fan_mode_map = {k: v for d in mappings for k, v in d.items()}

        self._supported_features |= SUPPORT_FAN_MODE

    @property
    def name(self) -> Optional[str]:
        """Return the name of the honeywell, if any."""
        return self._device.name

    @property
    def device_state_attributes(self) -> Dict[str, Any]:
        """Return the device specific state attributes."""
        data = {}
        data[ATTR_FAN_ACTION] = "running" if self._device.fan_running else "idle"
        if self._device.raw_dr_data:
            data["dr_phase"] = self._device.raw_dr_data.get("Phase")
        return data

    @property
    def supported_features(self) -> int:
        """Return the list of supported features."""
        return self._supported_features

    @property
    def min_temp(self) -> float:
        """Return the minimum temperature."""
        if self.hvac_mode in [HVAC_MODE_COOL, HVAC_MODE_HEAT_COOL]:
            return self._device.raw_ui_data["CoolLowerSetptLimit"]
        if self.hvac_mode == HVAC_MODE_HEAT:
            return self._device.raw_ui_data["HeatLowerSetptLimit"]
        return None

    @property
    def max_temp(self) -> float:
        """Return the maximum temperature."""
        if self.hvac_mode == HVAC_MODE_COOL:
            return self._device.raw_ui_data["CoolUpperSetptLimit"]
        if self.hvac_mode in [HVAC_MODE_HEAT, HVAC_MODE_HEAT_COOL]:
            return self._device.raw_ui_data["HeatUpperSetptLimit"]
        return None

    @property
    def temperature_unit(self) -> str:
        """Return the unit of measurement."""
        return TEMP_CELSIUS if self._device.temperature_unit == "C" else TEMP_FAHRENHEIT

    @property
    def current_humidity(self) -> Optional[int]:
        """Return the current humidity."""
        return self._device.current_humidity

    @property
    def hvac_mode(self) -> str:
        """Return hvac operation ie. heat, cool mode."""
        return HW_MODE_TO_HVAC_MODE[self._device.system_mode]

    @property
    def hvac_modes(self) -> List[str]:
        """Return the list of available hvac operation modes."""
        return list(self._hvac_mode_map)

    @property
    def hvac_action(self) -> Optional[str]:
        """Return the current running hvac operation if supported."""
        if self.hvac_mode == HVAC_MODE_OFF:
            return None
        return HW_MODE_TO_HA_HVAC_ACTION[self._device.equipment_output_status]

    @property
    def current_temperature(self) -> Optional[float]:
        """Return the current temperature."""
        return self._device.current_temperature

    @property
    def target_temperature(self) -> Optional[float]:
        """Return the temperature we try to reach."""
        if self.hvac_mode == HVAC_MODE_COOL:
            return self._device.setpoint_cool
        if self.hvac_mode == HVAC_MODE_HEAT:
            return self._device.setpoint_heat
        return None

    @property
    def target_temperature_high(self) -> Optional[float]:
        """Return the highbound target temperature we try to reach."""
        if self.hvac_mode == HVAC_MODE_HEAT_COOL:
            return self._device.setpoint_cool
        return None

    @property
    def target_temperature_low(self) -> Optional[float]:
        """Return the lowbound target temperature we try to reach."""
        if self.hvac_mode == HVAC_MODE_HEAT_COOL:
            return self._device.setpoint_heat
        return None

    @property
    def preset_mode(self) -> Optional[str]:
        """Return the current preset mode, e.g., home, away, temp."""
        return PRESET_AWAY if self._away else None

    @property
    def preset_modes(self) -> Optional[List[str]]:
        """Return a list of available preset modes."""
        return [PRESET_NONE, PRESET_AWAY]

    @property
    def is_aux_heat(self) -> Optional[str]:
        """Return true if aux heater."""
        return self._device.system_mode == "emheat"

    @property
    def fan_mode(self) -> Optional[str]:
        """Return the fan setting."""
        return HW_FAN_MODE_TO_HA[self._device.fan_mode]

    @property
    def fan_modes(self) -> Optional[List[str]]:
        """Return the list of available fan modes."""
        return list(self._fan_mode_map)

    def _set_temperature(self, **kwargs) -> None:
        """Set new target temperature."""
        temperature = kwargs.get(ATTR_TEMPERATURE)
        if temperature is None:
            return
        try:
            # Get current mode
            mode = self._device.system_mode
            # Set hold if this is not the case
            if getattr(self._device, "hold_{}".format(mode)) is False:
                # Get next period key
                next_period_key = "{}NextPeriod".format(mode.capitalize())
                # Get next period raw value
                next_period = self._device.raw_ui_data.get(next_period_key)
                # Get next period time
                hour, minute = divmod(next_period * 15, 60)
                # Set hold time
                setattr(
                    self._device, "hold_{}".format(mode), datetime.time(hour, minute)
                )
            # Set temperature
            setattr(self._device, "setpoint_{}".format(mode), temperature)
        except somecomfort.SomeComfortError:
            _LOGGER.error("Temperature %.1f out of range", temperature)

    def set_temperature(self, **kwargs) -> None:
        """Set new target temperature."""
        if {HVAC_MODE_COOL, HVAC_MODE_HEAT} & set(self._hvac_mode_map):
            self._set_temperature(**kwargs)

        try:
            if HVAC_MODE_HEAT_COOL in self._hvac_mode_map:
                temperature = kwargs.get(ATTR_TARGET_TEMP_HIGH)
                if temperature:
                    self._device.setpoint_cool = temperature
                temperature = kwargs.get(ATTR_TARGET_TEMP_LOW)
                if temperature:
                    self._device.setpoint_heat = temperature
        except somecomfort.SomeComfortError as err:
            _LOGGER.error("Invalid temperature %s: %s", temperature, err)

    def set_fan_mode(self, fan_mode: str) -> None:
        """Set new target fan mode."""
        self._device.fan_mode = self._fan_mode_map[fan_mode]

    def set_hvac_mode(self, hvac_mode: str) -> None:
        """Set new target hvac mode."""
        self._device.system_mode = self._hvac_mode_map[hvac_mode]

    def _turn_away_mode_on(self) -> None:
        """Turn away on.

        Somecomfort does have a proprietary away mode, but it doesn't really
        work the way it should. For example: If you set a temperature manually
        it doesn't get overwritten when away mode is switched on.
        """
        self._away = True
        try:
            # Get current mode
            mode = self._device.system_mode
        except somecomfort.SomeComfortError:
            _LOGGER.error("Can not get system mode")
            return
        try:

            # Set permanent hold
            setattr(self._device, "hold_{}".format(mode), True)
            # Set temperature
            setattr(
                self._device,
                "setpoint_{}".format(mode),
                getattr(self, "_{}_away_temp".format(mode)),
            )
        except somecomfort.SomeComfortError:
            _LOGGER.error(
                "Temperature %.1f out of range",
                getattr(self, "_{}_away_temp".format(mode)),
            )

    def _turn_away_mode_off(self) -> None:
        """Turn away off."""
        self._away = False
        try:
            # Disabling all hold modes
            self._device.hold_cool = False
            self._device.hold_heat = False
        except somecomfort.SomeComfortError:
            _LOGGER.error("Can not stop hold mode")

    def set_preset_mode(self, preset_mode: str) -> None:
        """Set new preset mode."""
        if preset_mode == PRESET_AWAY:
            self._turn_away_mode_on()
        else:
            self._turn_away_mode_off()

    def turn_aux_heat_on(self) -> None:
        """Turn auxiliary heater on."""
        self._device.system_mode = "emheat"

    def turn_aux_heat_off(self) -> None:
        """Turn auxiliary heater off."""
        if HVAC_MODE_HEAT in self.hvac_modes:
            self.set_hvac_mode(HVAC_MODE_HEAT)
        else:
            self.set_hvac_mode(HVAC_MODE_OFF)

    def _retry(self) -> bool:
        """Recreate a new somecomfort client.

        When we got an error, the best way to be sure that the next query
        will succeed, is to recreate a new somecomfort client.
        """
        try:
            self._client = somecomfort.SomeComfort(self._username, self._password)
        except somecomfort.AuthError:
            _LOGGER.error("Failed to login to honeywell account %s", self._username)
            return False
        except somecomfort.SomeComfortError as ex:
            _LOGGER.error("Failed to initialize honeywell client: %s", str(ex))
            return False

        devices = [
            device
            for location in self._client.locations_by_id.values()
            for device in location.devices_by_id.values()
            if device.name == self._device.name
        ]

        if len(devices) != 1:
            _LOGGER.error("Failed to find device %s", self._device.name)
            return False

        self._device = devices[0]
        return True

    def update(self) -> None:
        """Update the state."""
        retries = 3
        while retries > 0:
            try:
                self._device.refresh()
                break
            except (
                somecomfort.client.APIRateLimited,
                OSError,
                requests.exceptions.ReadTimeout,
            ) as exp:
                retries -= 1
                if retries == 0:
                    raise exp
                if not self._retry():
                    raise exp
                _LOGGER.error("SomeComfort update failed, Retrying - Error: %s", exp)

        _LOGGER.debug(
            # noqa; pylint: disable=protected-access
            "latestData = %s ",
            self._device._data,
        )
