"""Offer geolocation automation rules."""
from __future__ import annotations

import logging
from typing import Final

import voluptuous as vol

from homeassistant.const import CONF_EVENT, CONF_PLATFORM, CONF_SOURCE, CONF_ZONE
from homeassistant.core import (
    CALLBACK_TYPE,
    Event,
    HassJob,
    HomeAssistant,
    State,
    callback,
)
from homeassistant.helpers import condition, config_validation as cv
from homeassistant.helpers.config_validation import entity_domain
from homeassistant.helpers.event import TrackStates, async_track_state_change_filtered
from homeassistant.helpers.trigger import TriggerActionType, TriggerInfo
from homeassistant.helpers.typing import ConfigType

from . import DOMAIN

_LOGGER = logging.getLogger(__name__)

EVENT_ENTER: Final = "enter"
EVENT_LEAVE: Final = "leave"
DEFAULT_EVENT: Final = EVENT_ENTER

TRIGGER_SCHEMA = cv.TRIGGER_BASE_SCHEMA.extend(
    {
        vol.Required(CONF_PLATFORM): "geo_location",
        vol.Required(CONF_SOURCE): cv.string,
        vol.Required(CONF_ZONE): entity_domain("zone"),
        vol.Required(CONF_EVENT, default=DEFAULT_EVENT): vol.Any(
            EVENT_ENTER, EVENT_LEAVE
        ),
    }
)


def source_match(state: State | None, source: str) -> bool:
    """Check if the state matches the provided source."""
    return state is not None and state.attributes.get("source") == source


async def async_attach_trigger(
    hass: HomeAssistant,
    config: ConfigType,
    action: TriggerActionType,
    trigger_info: TriggerInfo,
) -> CALLBACK_TYPE:
    """Listen for state changes based on configuration."""
    trigger_data = trigger_info["trigger_data"]
    source: str = config[CONF_SOURCE].lower()
    zone_entity_id: str = config[CONF_ZONE]
    trigger_event: str = config[CONF_EVENT]
    job = HassJob(action)

    @callback
    def state_change_listener(event: Event) -> None:
        """Handle specific state changes."""
        # Skip if the event's source does not match the trigger's source.
        from_state = event.data.get("old_state")
        to_state = event.data.get("new_state")
        if not source_match(from_state, source) and not source_match(to_state, source):
            return

        if (zone_state := hass.states.get(zone_entity_id)) is None:
            _LOGGER.warning(
                "Unable to execute automation %s: Zone %s not found",
                trigger_info["name"],
                zone_entity_id,
            )
            return

        from_match = (
            condition.zone(hass, zone_state, from_state) if from_state else False
        )
        to_match = condition.zone(hass, zone_state, to_state) if to_state else False

        if (
            trigger_event == EVENT_ENTER
            and not from_match
            and to_match
            or trigger_event == EVENT_LEAVE
            and from_match
            and not to_match
        ):
            hass.async_run_hass_job(
                job,
                {
                    "trigger": {
                        **trigger_data,
                        "platform": "geo_location",
                        "source": source,
                        "entity_id": event.data.get("entity_id"),
                        "from_state": from_state,
                        "to_state": to_state,
                        "zone": zone_state,
                        "event": trigger_event,
                        "description": f"geo_location - {source}",
                    }
                },
                event.context,
            )

    return async_track_state_change_filtered(
        hass, TrackStates(False, set(), {DOMAIN}), state_change_listener
    ).async_remove
