"""The Intent integration."""

from __future__ import annotations

from collections.abc import Collection
import logging
from typing import Any, Protocol

from aiohttp import web
import voluptuous as vol

from homeassistant.components import http, sensor
from homeassistant.components.climate import DOMAIN as CLIMATE_DOMAIN
from homeassistant.components.cover import (
    ATTR_POSITION,
    DOMAIN as COVER_DOMAIN,
    SERVICE_CLOSE_COVER,
    SERVICE_OPEN_COVER,
    SERVICE_SET_COVER_POSITION,
    CoverDeviceClass,
)
from homeassistant.components.http.data_validator import RequestDataValidator
from homeassistant.components.lock import (
    DOMAIN as LOCK_DOMAIN,
    SERVICE_LOCK,
    SERVICE_UNLOCK,
)
from homeassistant.components.media_player import MediaPlayerDeviceClass
from homeassistant.components.switch import SwitchDeviceClass
from homeassistant.components.valve import (
    DOMAIN as VALVE_DOMAIN,
    SERVICE_CLOSE_VALVE,
    SERVICE_OPEN_VALVE,
    SERVICE_SET_VALVE_POSITION,
    ValveDeviceClass,
)
from homeassistant.const import (
    ATTR_ENTITY_ID,
    SERVICE_TOGGLE,
    SERVICE_TURN_OFF,
    SERVICE_TURN_ON,
)
from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN, HomeAssistant, State
from homeassistant.helpers import (
    area_registry as ar,
    config_validation as cv,
    integration_platform,
    intent,
)
from homeassistant.helpers.typing import ConfigType
from homeassistant.util import dt as dt_util

from .const import DOMAIN, TIMER_DATA
from .timers import (
    CancelAllTimersIntentHandler,
    CancelTimerIntentHandler,
    DecreaseTimerIntentHandler,
    IncreaseTimerIntentHandler,
    PauseTimerIntentHandler,
    StartTimerIntentHandler,
    TimerEventType,
    TimerInfo,
    TimerManager,
    TimerStatusIntentHandler,
    UnpauseTimerIntentHandler,
    async_device_supports_timers,
    async_register_timer_handler,
)

_LOGGER = logging.getLogger(__name__)

CONFIG_SCHEMA = cv.empty_config_schema(DOMAIN)

__all__ = [
    "DOMAIN",
    "TimerEventType",
    "TimerInfo",
    "async_device_supports_timers",
    "async_register_timer_handler",
]

ONOFF_DEVICE_CLASSES = {
    CoverDeviceClass,
    ValveDeviceClass,
    SwitchDeviceClass,
    MediaPlayerDeviceClass,
}


async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
    """Set up the Intent component."""
    hass.data[TIMER_DATA] = TimerManager(hass)

    hass.http.register_view(IntentHandleView())

    await integration_platform.async_process_integration_platforms(
        hass, DOMAIN, _async_process_intent
    )

    intent.async_register(
        hass,
        OnOffIntentHandler(
            intent.INTENT_TURN_ON,
            HOMEASSISTANT_DOMAIN,
            SERVICE_TURN_ON,
            description="Turns on/opens a device or entity",
            device_classes=ONOFF_DEVICE_CLASSES,
        ),
    )
    intent.async_register(
        hass,
        OnOffIntentHandler(
            intent.INTENT_TURN_OFF,
            HOMEASSISTANT_DOMAIN,
            SERVICE_TURN_OFF,
            description="Turns off/closes a device or entity",
            device_classes=ONOFF_DEVICE_CLASSES,
        ),
    )
    intent.async_register(
        hass,
        intent.ServiceIntentHandler(
            intent.INTENT_TOGGLE,
            HOMEASSISTANT_DOMAIN,
            SERVICE_TOGGLE,
            description="Toggles a device or entity",
            device_classes=ONOFF_DEVICE_CLASSES,
        ),
    )
    intent.async_register(
        hass,
        GetStateIntentHandler(),
    )
    intent.async_register(
        hass,
        NevermindIntentHandler(),
    )
    intent.async_register(hass, SetPositionIntentHandler())
    intent.async_register(hass, StartTimerIntentHandler())
    intent.async_register(hass, CancelTimerIntentHandler())
    intent.async_register(hass, CancelAllTimersIntentHandler())
    intent.async_register(hass, IncreaseTimerIntentHandler())
    intent.async_register(hass, DecreaseTimerIntentHandler())
    intent.async_register(hass, PauseTimerIntentHandler())
    intent.async_register(hass, UnpauseTimerIntentHandler())
    intent.async_register(hass, TimerStatusIntentHandler())
    intent.async_register(hass, GetCurrentDateIntentHandler())
    intent.async_register(hass, GetCurrentTimeIntentHandler())
    intent.async_register(hass, RespondIntentHandler())
    intent.async_register(hass, GetTemperatureIntent())

    return True


class IntentPlatformProtocol(Protocol):
    """Define the format that intent platforms can have."""

    async def async_setup_intents(self, hass: HomeAssistant) -> None:
        """Set up platform intents."""


class OnOffIntentHandler(intent.ServiceIntentHandler):
    """Intent handler for on/off that also supports covers, valves, locks, etc."""

    async def async_call_service(
        self, domain: str, service: str, intent_obj: intent.Intent, state: State
    ) -> None:
        """Call service on entity with handling for special cases."""
        hass = intent_obj.hass

        if state.domain == COVER_DOMAIN:
            # on = open
            # off = close
            if service == SERVICE_TURN_ON:
                service_name = SERVICE_OPEN_COVER
            else:
                service_name = SERVICE_CLOSE_COVER

            await self._run_then_background(
                hass.async_create_task(
                    hass.services.async_call(
                        COVER_DOMAIN,
                        service_name,
                        {ATTR_ENTITY_ID: state.entity_id},
                        context=intent_obj.context,
                        blocking=True,
                    )
                )
            )
            return

        if state.domain == LOCK_DOMAIN:
            # on = lock
            # off = unlock
            if service == SERVICE_TURN_ON:
                service_name = SERVICE_LOCK
            else:
                service_name = SERVICE_UNLOCK

            await self._run_then_background(
                hass.async_create_task(
                    hass.services.async_call(
                        LOCK_DOMAIN,
                        service_name,
                        {ATTR_ENTITY_ID: state.entity_id},
                        context=intent_obj.context,
                        blocking=True,
                    )
                )
            )
            return

        if state.domain == VALVE_DOMAIN:
            # on = opened
            # off = closed
            if service == SERVICE_TURN_ON:
                service_name = SERVICE_OPEN_VALVE
            else:
                service_name = SERVICE_CLOSE_VALVE

            await self._run_then_background(
                hass.async_create_task(
                    hass.services.async_call(
                        VALVE_DOMAIN,
                        service_name,
                        {ATTR_ENTITY_ID: state.entity_id},
                        context=intent_obj.context,
                        blocking=True,
                    )
                )
            )
            return

        if not hass.services.has_service(state.domain, service):
            raise intent.IntentHandleError(
                f"Service {service} does not support entity {state.entity_id}"
            )

        # Fall back to homeassistant.turn_on/off
        await super().async_call_service(domain, service, intent_obj, state)


class GetStateIntentHandler(intent.IntentHandler):
    """Answer questions about entity states."""

    intent_type = intent.INTENT_GET_STATE
    description = "Gets or checks the state of a device or entity"
    slot_schema = {
        vol.Any("name", "area", "floor"): cv.string,
        vol.Optional("domain"): vol.All(cv.ensure_list, [cv.string]),
        vol.Optional("device_class"): vol.All(cv.ensure_list, [cv.string]),
        vol.Optional("state"): vol.All(cv.ensure_list, [cv.string]),
        vol.Optional("preferred_area_id"): cv.string,
        vol.Optional("preferred_floor_id"): cv.string,
    }

    async def async_handle(self, intent_obj: intent.Intent) -> intent.IntentResponse:
        """Handle the hass intent."""
        hass = intent_obj.hass
        slots = self.async_validate_slots(intent_obj.slots)

        # Entity name to match
        name_slot = slots.get("name", {})
        entity_name: str | None = name_slot.get("value")

        # Get area/floor info
        area_slot = slots.get("area", {})
        area_id = area_slot.get("value")

        floor_slot = slots.get("floor", {})
        floor_id = floor_slot.get("value")

        # Optional domain/device class filters.
        # Convert to sets for speed.
        domains: set[str] | None = None
        device_classes: set[str] | None = None

        if "domain" in slots:
            domains = set(slots["domain"]["value"])

        if "device_class" in slots:
            device_classes = set(slots["device_class"]["value"])

        state_names: set[str] | None = None
        if "state" in slots:
            state_names = set(slots["state"]["value"])

        match_constraints = intent.MatchTargetsConstraints(
            name=entity_name,
            area_name=area_id,
            floor_name=floor_id,
            domains=domains,
            device_classes=device_classes,
            assistant=intent_obj.assistant,
        )
        match_preferences = intent.MatchTargetsPreferences(
            area_id=slots.get("preferred_area_id", {}).get("value"),
            floor_id=slots.get("preferred_floor_id", {}).get("value"),
        )
        match_result = intent.async_match_targets(
            hass, match_constraints, match_preferences
        )
        if (
            (not match_result.is_match)
            and (match_result.no_match_reason is not None)
            and (not match_result.no_match_reason.is_no_entities_reason())
        ):
            # Don't try to answer questions for certain errors.
            # Other match failure reasons are OK.
            raise intent.MatchFailedError(
                result=match_result, constraints=match_constraints
            )

        # Create response
        response = intent_obj.create_response()
        response.response_type = intent.IntentResponseType.QUERY_ANSWER

        success_results: list[intent.IntentResponseTarget] = []
        if match_result.areas:
            success_results.extend(
                intent.IntentResponseTarget(
                    type=intent.IntentResponseTargetType.AREA,
                    name=area.name,
                    id=area.id,
                )
                for area in match_result.areas
            )

        if match_result.floors:
            success_results.extend(
                intent.IntentResponseTarget(
                    type=intent.IntentResponseTargetType.FLOOR,
                    name=floor.name,
                    id=floor.floor_id,
                )
                for floor in match_result.floors
            )

        # If we are matching a state name (e.g., "which lights are on?"), then
        # we split the filtered states into two groups:
        #
        # 1. matched - entity states that match the requested state ("on")
        # 2. unmatched - entity states that don't match ("off")
        #
        # In the response template, we can access these as query.matched and
        # query.unmatched.
        matched_states: list[State] = []
        unmatched_states: list[State] = []

        for state in match_result.states:
            success_results.append(
                intent.IntentResponseTarget(
                    type=intent.IntentResponseTargetType.ENTITY,
                    name=state.name,
                    id=state.entity_id,
                ),
            )

            if (not state_names) or (state.state in state_names):
                # If no state constraint, then all states will be "matched"
                matched_states.append(state)
            else:
                unmatched_states.append(state)

        response.async_set_results(success_results=success_results)
        response.async_set_states(matched_states, unmatched_states)

        return response


class NevermindIntentHandler(intent.IntentHandler):
    """Takes no action."""

    intent_type = intent.INTENT_NEVERMIND
    description = "Cancels the current request and does nothing"

    async def async_handle(self, intent_obj: intent.Intent) -> intent.IntentResponse:
        """Do nothing and produces an empty response."""
        return intent_obj.create_response()


class SetPositionIntentHandler(intent.DynamicServiceIntentHandler):
    """Intent handler for setting positions."""

    def __init__(self) -> None:
        """Create set position handler."""
        super().__init__(
            intent.INTENT_SET_POSITION,
            required_slots={
                ATTR_POSITION: vol.All(vol.Coerce(int), vol.Range(min=0, max=100))
            },
            description="Sets the position of a device or entity",
            platforms={COVER_DOMAIN, VALVE_DOMAIN},
            device_classes={CoverDeviceClass, ValveDeviceClass},
        )

    def get_domain_and_service(
        self, intent_obj: intent.Intent, state: State
    ) -> tuple[str, str]:
        """Get the domain and service name to call."""
        if state.domain == COVER_DOMAIN:
            return (COVER_DOMAIN, SERVICE_SET_COVER_POSITION)

        if state.domain == VALVE_DOMAIN:
            return (VALVE_DOMAIN, SERVICE_SET_VALVE_POSITION)

        raise intent.IntentHandleError(f"Domain not supported: {state.domain}")


class GetCurrentDateIntentHandler(intent.IntentHandler):
    """Gets the current date."""

    intent_type = intent.INTENT_GET_CURRENT_DATE
    description = "Gets the current date"

    async def async_handle(self, intent_obj: intent.Intent) -> intent.IntentResponse:
        response = intent_obj.create_response()
        response.async_set_speech_slots({"date": dt_util.now().date()})
        return response


class GetCurrentTimeIntentHandler(intent.IntentHandler):
    """Gets the current time."""

    intent_type = intent.INTENT_GET_CURRENT_TIME
    description = "Gets the current time"

    async def async_handle(self, intent_obj: intent.Intent) -> intent.IntentResponse:
        response = intent_obj.create_response()
        response.async_set_speech_slots({"time": dt_util.now().time()})
        return response


class RespondIntentHandler(intent.IntentHandler):
    """Responds with no action."""

    intent_type = intent.INTENT_RESPOND
    description = "Returns the provided response with no action."

    slot_schema = {
        vol.Optional("response"): cv.string,
    }

    async def async_handle(self, intent_obj: intent.Intent) -> intent.IntentResponse:
        """Return the provided response, but take no action."""
        slots = self.async_validate_slots(intent_obj.slots)
        response = intent_obj.create_response()

        if "response" in slots:
            response.async_set_speech(slots["response"]["value"])

        return response


class GetTemperatureIntent(intent.IntentHandler):
    """Handle GetTemperature intents."""

    intent_type = intent.INTENT_GET_TEMPERATURE
    description = "Gets the current temperature of a climate device or entity"
    slot_schema = {
        vol.Optional("area"): intent.non_empty_string,
        vol.Optional("name"): intent.non_empty_string,
        vol.Optional("floor"): intent.non_empty_string,
        vol.Optional("preferred_area_id"): cv.string,
        vol.Optional("preferred_floor_id"): cv.string,
    }
    platforms = {CLIMATE_DOMAIN}

    async def async_handle(self, intent_obj: intent.Intent) -> intent.IntentResponse:
        """Handle the intent."""
        hass = intent_obj.hass
        slots = self.async_validate_slots(intent_obj.slots)

        name: str | None = None
        if "name" in slots:
            name = slots["name"]["value"]

        area: str | None = None
        if "area" in slots:
            area = slots["area"]["value"]

        floor_name: str | None = None
        if "floor" in slots:
            floor_name = slots["floor"]["value"]

        match_preferences = intent.MatchTargetsPreferences(
            area_id=slots.get("preferred_area_id", {}).get("value"),
            floor_id=slots.get("preferred_floor_id", {}).get("value"),
        )

        if (not name) and (area or match_preferences.area_id):
            # Look for temperature sensors assigned to an area
            area_registry = ar.async_get(hass)
            area_temperature_ids: dict[str, str] = {}

            # Keep candidates that are registered as area temperature sensors
            def area_candidate_filter(
                candidate: intent.MatchTargetsCandidate,
                possible_area_ids: Collection[str],
            ) -> bool:
                for area_id in possible_area_ids:
                    temperature_id = area_temperature_ids.get(area_id)
                    if (temperature_id is None) and (
                        area_entry := area_registry.async_get_area(area_id)
                    ):
                        temperature_id = area_entry.temperature_entity_id or ""
                        area_temperature_ids[area_id] = temperature_id

                    if candidate.state.entity_id == temperature_id:
                        return True

                return False

            match_constraints = intent.MatchTargetsConstraints(
                area_name=area,
                floor_name=floor_name,
                domains=[sensor.DOMAIN],
                device_classes=[sensor.SensorDeviceClass.TEMPERATURE],
                assistant=intent_obj.assistant,
                single_target=True,
            )
            match_result = intent.async_match_targets(
                hass,
                match_constraints,
                match_preferences,
                area_candidate_filter=area_candidate_filter,
            )
            if match_result.is_match:
                # Found temperature sensor
                response = intent_obj.create_response()
                response.response_type = intent.IntentResponseType.QUERY_ANSWER
                response.async_set_states(matched_states=match_result.states)
                return response

        # Look for climate devices
        match_constraints = intent.MatchTargetsConstraints(
            name=name,
            area_name=area,
            floor_name=floor_name,
            domains=[CLIMATE_DOMAIN],
            assistant=intent_obj.assistant,
            single_target=True,
        )
        match_result = intent.async_match_targets(
            hass, match_constraints, match_preferences
        )
        if not match_result.is_match:
            raise intent.MatchFailedError(
                result=match_result, constraints=match_constraints
            )

        response = intent_obj.create_response()
        response.response_type = intent.IntentResponseType.QUERY_ANSWER
        response.async_set_states(matched_states=match_result.states)
        return response


async def _async_process_intent(
    hass: HomeAssistant, domain: str, platform: IntentPlatformProtocol
) -> None:
    """Process the intents of an integration."""
    await platform.async_setup_intents(hass)


class IntentHandleView(http.HomeAssistantView):
    """View to handle intents from JSON."""

    url = "/api/intent/handle"
    name = "api:intent:handle"

    @RequestDataValidator(
        vol.Schema(
            {
                vol.Required("name"): cv.string,
                vol.Optional("data"): vol.Schema({cv.string: object}),
            }
        )
    )
    async def post(self, request: web.Request, data: dict[str, Any]) -> web.Response:
        """Handle intent with name/data."""
        hass = request.app[http.KEY_HASS]
        language = hass.config.language

        try:
            intent_name = data["name"]
            slots = {
                key: {"value": value} for key, value in data.get("data", {}).items()
            }
            intent_result = await intent.async_handle(
                hass, DOMAIN, intent_name, slots, "", self.context(request)
            )
        except intent.IntentHandleError as err:
            intent_result = intent.IntentResponse(language=language)
            intent_result.async_set_speech(str(err))

        if intent_result is None:
            intent_result = intent.IntentResponse(language=language)  # type: ignore[unreachable]
            intent_result.async_set_speech("Sorry, I couldn't handle that")

        return self.json(intent_result)