"""Support for AlarmDecoder-based alarm control panels (Honeywell/DSC)."""
import logging

import voluptuous as vol

from homeassistant.components.alarm_control_panel import (
    FORMAT_NUMBER,
    AlarmControlPanelEntity,
)
from homeassistant.components.alarm_control_panel.const import (
    SUPPORT_ALARM_ARM_AWAY,
    SUPPORT_ALARM_ARM_HOME,
    SUPPORT_ALARM_ARM_NIGHT,
)
from homeassistant.const import (
    ATTR_CODE,
    STATE_ALARM_ARMED_AWAY,
    STATE_ALARM_ARMED_HOME,
    STATE_ALARM_ARMED_NIGHT,
    STATE_ALARM_DISARMED,
    STATE_ALARM_TRIGGERED,
)
import homeassistant.helpers.config_validation as cv

from . import (
    CONF_AUTO_BYPASS,
    CONF_CODE_ARM_REQUIRED,
    DATA_AD,
    DOMAIN,
    SIGNAL_PANEL_MESSAGE,
)

_LOGGER = logging.getLogger(__name__)

SERVICE_ALARM_TOGGLE_CHIME = "alarm_toggle_chime"
ALARM_TOGGLE_CHIME_SCHEMA = vol.Schema({vol.Required(ATTR_CODE): cv.string})

SERVICE_ALARM_KEYPRESS = "alarm_keypress"
ATTR_KEYPRESS = "keypress"
ALARM_KEYPRESS_SCHEMA = vol.Schema({vol.Required(ATTR_KEYPRESS): cv.string})


def setup_platform(hass, config, add_entities, discovery_info=None):
    """Set up for AlarmDecoder alarm panels."""
    if discovery_info is None:
        return

    auto_bypass = discovery_info[CONF_AUTO_BYPASS]
    code_arm_required = discovery_info[CONF_CODE_ARM_REQUIRED]
    entity = AlarmDecoderAlarmPanel(auto_bypass, code_arm_required)
    add_entities([entity])

    def alarm_toggle_chime_handler(service):
        """Register toggle chime handler."""
        code = service.data.get(ATTR_CODE)
        entity.alarm_toggle_chime(code)

    hass.services.register(
        DOMAIN,
        SERVICE_ALARM_TOGGLE_CHIME,
        alarm_toggle_chime_handler,
        schema=ALARM_TOGGLE_CHIME_SCHEMA,
    )

    def alarm_keypress_handler(service):
        """Register keypress handler."""
        keypress = service.data[ATTR_KEYPRESS]
        entity.alarm_keypress(keypress)

    hass.services.register(
        DOMAIN,
        SERVICE_ALARM_KEYPRESS,
        alarm_keypress_handler,
        schema=ALARM_KEYPRESS_SCHEMA,
    )


class AlarmDecoderAlarmPanel(AlarmControlPanelEntity):
    """Representation of an AlarmDecoder-based alarm panel."""

    def __init__(self, auto_bypass, code_arm_required):
        """Initialize the alarm panel."""
        self._display = ""
        self._name = "Alarm Panel"
        self._state = None
        self._ac_power = None
        self._alarm_event_occurred = None
        self._backlight_on = None
        self._battery_low = None
        self._check_zone = None
        self._chime = None
        self._entry_delay_off = None
        self._programming_mode = None
        self._ready = None
        self._zone_bypassed = None
        self._auto_bypass = auto_bypass
        self._code_arm_required = code_arm_required

    async def async_added_to_hass(self):
        """Register callbacks."""
        self.async_on_remove(
            self.hass.helpers.dispatcher.async_dispatcher_connect(
                SIGNAL_PANEL_MESSAGE, self._message_callback
            )
        )

    def _message_callback(self, message):
        """Handle received messages."""
        if message.alarm_sounding or message.fire_alarm:
            self._state = STATE_ALARM_TRIGGERED
        elif message.armed_away:
            self._state = STATE_ALARM_ARMED_AWAY
        elif message.armed_home and (message.entry_delay_off or message.perimeter_only):
            self._state = STATE_ALARM_ARMED_NIGHT
        elif message.armed_home:
            self._state = STATE_ALARM_ARMED_HOME
        else:
            self._state = STATE_ALARM_DISARMED

        self._ac_power = message.ac_power
        self._alarm_event_occurred = message.alarm_event_occurred
        self._backlight_on = message.backlight_on
        self._battery_low = message.battery_low
        self._check_zone = message.check_zone
        self._chime = message.chime_on
        self._entry_delay_off = message.entry_delay_off
        self._programming_mode = message.programming_mode
        self._ready = message.ready
        self._zone_bypassed = message.zone_bypassed

        self.schedule_update_ha_state()

    @property
    def name(self):
        """Return the name of the device."""
        return self._name

    @property
    def should_poll(self):
        """Return the polling state."""
        return False

    @property
    def code_format(self):
        """Return one or more digits/characters."""
        return FORMAT_NUMBER

    @property
    def state(self):
        """Return the state of the device."""
        return self._state

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

    @property
    def code_arm_required(self):
        """Whether the code is required for arm actions."""
        return self._code_arm_required

    @property
    def device_state_attributes(self):
        """Return the state attributes."""
        return {
            "ac_power": self._ac_power,
            "alarm_event_occurred": self._alarm_event_occurred,
            "backlight_on": self._backlight_on,
            "battery_low": self._battery_low,
            "check_zone": self._check_zone,
            "chime": self._chime,
            "entry_delay_off": self._entry_delay_off,
            "programming_mode": self._programming_mode,
            "ready": self._ready,
            "zone_bypassed": self._zone_bypassed,
            "code_arm_required": self._code_arm_required,
        }

    def alarm_disarm(self, code=None):
        """Send disarm command."""
        if code:
            self.hass.data[DATA_AD].send(f"{code!s}1")

    def alarm_arm_away(self, code=None):
        """Send arm away command."""
        self.hass.data[DATA_AD].arm_away(
            code=code,
            code_arm_required=self._code_arm_required,
            auto_bypass=self._auto_bypass,
        )

    def alarm_arm_home(self, code=None):
        """Send arm home command."""
        self.hass.data[DATA_AD].arm_home(
            code=code,
            code_arm_required=self._code_arm_required,
            auto_bypass=self._auto_bypass,
        )

    def alarm_arm_night(self, code=None):
        """Send arm night command."""
        self.hass.data[DATA_AD].arm_night(
            code=code,
            code_arm_required=self._code_arm_required,
            auto_bypass=self._auto_bypass,
        )

    def alarm_toggle_chime(self, code=None):
        """Send toggle chime command."""
        if code:
            self.hass.data[DATA_AD].send(f"{code!s}9")

    def alarm_keypress(self, keypress):
        """Send custom keypresses."""
        if keypress:
            self.hass.data[DATA_AD].send(keypress)