"""This component provides support for RainMachine programs and zones."""
from __future__ import annotations

from collections.abc import Coroutine
from datetime import datetime

from regenmaschine.controller import Controller
from regenmaschine.errors import RequestError
import voluptuous as vol

from homeassistant.components.switch import SwitchEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import ATTR_ID
from homeassistant.core import HomeAssistant, callback
from homeassistant.helpers import config_validation as cv, entity_platform
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.update_coordinator import DataUpdateCoordinator

from . import RainMachineEntity, async_update_programs_and_zones
from .const import (
    CONF_ZONE_RUN_TIME,
    DATA_CONTROLLER,
    DATA_COORDINATOR,
    DATA_PROGRAMS,
    DATA_ZONES,
    DEFAULT_ZONE_RUN,
    DOMAIN,
    LOGGER,
)

ATTR_AREA = "area"
ATTR_CS_ON = "cs_on"
ATTR_CURRENT_CYCLE = "current_cycle"
ATTR_CYCLES = "cycles"
ATTR_DELAY = "delay"
ATTR_DELAY_ON = "delay_on"
ATTR_FIELD_CAPACITY = "field_capacity"
ATTR_NEXT_RUN = "next_run"
ATTR_NO_CYCLES = "number_of_cycles"
ATTR_PRECIP_RATE = "sprinkler_head_precipitation_rate"
ATTR_RESTRICTIONS = "restrictions"
ATTR_SLOPE = "slope"
ATTR_SOAK = "soak"
ATTR_SOIL_TYPE = "soil_type"
ATTR_SPRINKLER_TYPE = "sprinkler_head_type"
ATTR_STATUS = "status"
ATTR_SUN_EXPOSURE = "sun_exposure"
ATTR_TIME_REMAINING = "time_remaining"
ATTR_VEGETATION_TYPE = "vegetation_type"
ATTR_ZONES = "zones"

CONF_PROGRAM_ID = "program_id"
CONF_SECONDS = "seconds"
CONF_ZONE_ID = "zone_id"

DAYS = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]

RUN_STATUS_MAP = {0: "Not Running", 1: "Running", 2: "Queued"}

SOIL_TYPE_MAP = {
    0: "Not Set",
    1: "Clay Loam",
    2: "Silty Clay",
    3: "Clay",
    4: "Loam",
    5: "Sandy Loam",
    6: "Loamy Sand",
    7: "Sand",
    8: "Sandy Clay",
    9: "Silt Loam",
    10: "Silt",
    99: "Other",
}

SLOPE_TYPE_MAP = {
    0: "Not Set",
    1: "Flat",
    2: "Moderate",
    3: "High",
    4: "Very High",
    99: "Other",
}

SPRINKLER_TYPE_MAP = {
    0: "Not Set",
    1: "Popup Spray",
    2: "Rotors",
    3: "Surface Drip",
    4: "Bubblers Drip",
    99: "Other",
}

SUN_EXPOSURE_MAP = {0: "Not Set", 1: "Full Sun", 2: "Partial Shade", 3: "Full Shade"}

VEGETATION_MAP = {
    0: "Not Set",
    2: "Cool Season Grass",
    3: "Fruit Trees",
    4: "Flowers",
    5: "Vegetables",
    6: "Citrus",
    7: "Trees and Bushes",
    9: "Drought Tolerant Plants",
    10: "Warm Season Grass",
    99: "Other",
}

SWITCH_TYPE_PROGRAM = "program"
SWITCH_TYPE_ZONE = "zone"


async def async_setup_entry(
    hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
) -> None:
    """Set up RainMachine switches based on a config entry."""
    platform = entity_platform.current_platform.get()

    alter_program_schema = {vol.Required(CONF_PROGRAM_ID): cv.positive_int}
    alter_zone_schema = {vol.Required(CONF_ZONE_ID): cv.positive_int}

    for service_name, schema, method in [
        ("disable_program", alter_program_schema, "async_disable_program"),
        ("disable_zone", alter_zone_schema, "async_disable_zone"),
        ("enable_program", alter_program_schema, "async_enable_program"),
        ("enable_zone", alter_zone_schema, "async_enable_zone"),
        (
            "pause_watering",
            {vol.Required(CONF_SECONDS): cv.positive_int},
            "async_pause_watering",
        ),
        (
            "start_program",
            {vol.Required(CONF_PROGRAM_ID): cv.positive_int},
            "async_start_program",
        ),
        (
            "start_zone",
            {
                vol.Required(CONF_ZONE_ID): cv.positive_int,
                vol.Optional(
                    CONF_ZONE_RUN_TIME, default=DEFAULT_ZONE_RUN
                ): cv.positive_int,
            },
            "async_start_zone",
        ),
        ("stop_all", {}, "async_stop_all"),
        (
            "stop_program",
            {vol.Required(CONF_PROGRAM_ID): cv.positive_int},
            "async_stop_program",
        ),
        ("stop_zone", {vol.Required(CONF_ZONE_ID): cv.positive_int}, "async_stop_zone"),
        ("unpause_watering", {}, "async_unpause_watering"),
    ]:
        platform.async_register_entity_service(service_name, schema, method)

    controller = hass.data[DOMAIN][DATA_CONTROLLER][entry.entry_id]
    programs_coordinator = hass.data[DOMAIN][DATA_COORDINATOR][entry.entry_id][
        DATA_PROGRAMS
    ]
    zones_coordinator = hass.data[DOMAIN][DATA_COORDINATOR][entry.entry_id][DATA_ZONES]

    entities = []
    for uid, program in programs_coordinator.data.items():
        entities.append(
            RainMachineProgram(
                programs_coordinator, controller, uid, program["name"], entry
            )
        )
    for uid, zone in zones_coordinator.data.items():
        entities.append(
            RainMachineZone(zones_coordinator, controller, uid, zone["name"], entry)
        )

    async_add_entities(entities)


class RainMachineSwitch(RainMachineEntity, SwitchEntity):
    """A class to represent a generic RainMachine switch."""

    def __init__(
        self,
        coordinator: DataUpdateCoordinator,
        controller: Controller,
        uid: int,
        name: str,
        entry: ConfigEntry,
    ) -> None:
        """Initialize a generic RainMachine switch."""
        super().__init__(coordinator, controller)
        self._data = coordinator.data[uid]
        self._entry = entry
        self._is_active = True
        self._is_on = False
        self._name = name
        self._switch_type = type(self).__name__
        self._uid = uid

    @property
    def available(self) -> bool:
        """Return True if entity is available."""
        return self._is_active and self.coordinator.last_update_success

    @property
    def icon(self) -> str:
        """Return the icon."""
        return "mdi:water"

    @property
    def is_on(self) -> bool:
        """Return whether the program is running."""
        return self._is_on

    @property
    def unique_id(self) -> str:
        """Return a unique, Home Assistant friendly identifier for this entity."""
        return f"{self._unique_id}_{self._switch_type}_{self._uid}"

    async def _async_run_switch_coroutine(self, api_coro: Coroutine) -> None:
        """Run a coroutine to toggle the switch."""
        try:
            resp = await api_coro
        except RequestError as err:
            LOGGER.error(
                'Error while toggling %s "%s": %s',
                self._switch_type,
                self.unique_id,
                err,
            )
            return

        if resp["statusCode"] != 0:
            LOGGER.error(
                'Error while toggling %s "%s": %s',
                self._switch_type,
                self.unique_id,
                resp["message"],
            )
            return

        # Because of how inextricably linked programs and zones are, anytime one is
        # toggled, we make sure to update the data of both coordinators:
        self.hass.async_create_task(
            async_update_programs_and_zones(self.hass, self._entry)
        )

    async def async_disable_program(self, *, program_id):
        """Disable a program."""
        await self._controller.programs.disable(program_id)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_disable_zone(self, *, zone_id):
        """Disable a zone."""
        await self._controller.zones.disable(zone_id)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_enable_program(self, *, program_id):
        """Enable a program."""
        await self._controller.programs.enable(program_id)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_enable_zone(self, *, zone_id):
        """Enable a zone."""
        await self._controller.zones.enable(zone_id)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_pause_watering(self, *, seconds):
        """Pause watering for a set number of seconds."""
        await self._controller.watering.pause_all(seconds)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_start_program(self, *, program_id):
        """Start a particular program."""
        await self._controller.programs.start(program_id)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_start_zone(self, *, zone_id, zone_run_time):
        """Start a particular zone for a certain amount of time."""
        await self._controller.zones.start(zone_id, zone_run_time)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_stop_all(self):
        """Stop all watering."""
        await self._controller.watering.stop_all()
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_stop_program(self, *, program_id):
        """Stop a program."""
        await self._controller.programs.stop(program_id)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_stop_zone(self, *, zone_id):
        """Stop a zone."""
        await self._controller.zones.stop(zone_id)
        await async_update_programs_and_zones(self.hass, self._entry)

    async def async_unpause_watering(self):
        """Unpause watering."""
        await self._controller.watering.unpause_all()
        await async_update_programs_and_zones(self.hass, self._entry)

    @callback
    def update_from_latest_data(self) -> None:
        """Update the state."""
        self._data = self.coordinator.data[self._uid]
        self._is_active = self._data["active"]


class RainMachineProgram(RainMachineSwitch):
    """A RainMachine program."""

    @property
    def zones(self) -> list:
        """Return a list of active zones associated with this program."""
        return [z for z in self._data["wateringTimes"] if z["active"]]

    async def async_turn_off(self, **kwargs) -> None:
        """Turn the program off."""
        await self._async_run_switch_coroutine(
            self._controller.programs.stop(self._uid)
        )

    async def async_turn_on(self, **kwargs) -> None:
        """Turn the program on."""
        await self._async_run_switch_coroutine(
            self._controller.programs.start(self._uid)
        )

    @callback
    def update_from_latest_data(self) -> None:
        """Update the state."""
        super().update_from_latest_data()

        self._is_on = bool(self._data["status"])

        if self._data.get("nextRun") is not None:
            next_run = datetime.strptime(
                f"{self._data['nextRun']} {self._data['startTime']}",
                "%Y-%m-%d %H:%M",
            ).isoformat()
        else:
            next_run = None

        self._attrs.update(
            {
                ATTR_ID: self._uid,
                ATTR_NEXT_RUN: next_run,
                ATTR_SOAK: self.coordinator.data[self._uid].get("soak"),
                ATTR_STATUS: RUN_STATUS_MAP[self.coordinator.data[self._uid]["status"]],
                ATTR_ZONES: ", ".join(z["name"] for z in self.zones),
            }
        )


class RainMachineZone(RainMachineSwitch):
    """A RainMachine zone."""

    async def async_turn_off(self, **kwargs) -> None:
        """Turn the zone off."""
        await self._async_run_switch_coroutine(self._controller.zones.stop(self._uid))

    async def async_turn_on(self, **kwargs) -> None:
        """Turn the zone on."""
        await self._async_run_switch_coroutine(
            self._controller.zones.start(
                self._uid,
                self._entry.options[CONF_ZONE_RUN_TIME],
            )
        )

    @callback
    def update_from_latest_data(self) -> None:
        """Update the state."""
        super().update_from_latest_data()

        self._is_on = bool(self._data["state"])

        self._attrs.update(
            {
                ATTR_STATUS: RUN_STATUS_MAP[self._data["state"]],
                ATTR_AREA: self._data.get("waterSense").get("area"),
                ATTR_CURRENT_CYCLE: self._data.get("cycle"),
                ATTR_FIELD_CAPACITY: self._data.get("waterSense").get("fieldCapacity"),
                ATTR_ID: self._data["uid"],
                ATTR_NO_CYCLES: self._data.get("noOfCycles"),
                ATTR_PRECIP_RATE: self._data.get("waterSense").get("precipitationRate"),
                ATTR_RESTRICTIONS: self._data.get("restriction"),
                ATTR_SLOPE: SLOPE_TYPE_MAP.get(self._data.get("slope")),
                ATTR_SOIL_TYPE: SOIL_TYPE_MAP.get(self._data.get("sun")),
                ATTR_SPRINKLER_TYPE: SPRINKLER_TYPE_MAP.get(self._data.get("group_id")),
                ATTR_SUN_EXPOSURE: SUN_EXPOSURE_MAP.get(self._data.get("sun")),
                ATTR_TIME_REMAINING: self._data.get("remaining"),
                ATTR_VEGETATION_TYPE: VEGETATION_MAP.get(self._data.get("type")),
            }
        )