"""Intents for the todo integration."""

from __future__ import annotations

from homeassistant.core import HomeAssistant
from homeassistant.helpers import intent
from homeassistant.helpers.entity_component import EntityComponent

from . import DOMAIN, TodoItem, TodoItemStatus, TodoListEntity

INTENT_LIST_ADD_ITEM = "HassListAddItem"


async def async_setup_intents(hass: HomeAssistant) -> None:
    """Set up the todo intents."""
    intent.async_register(hass, ListAddItemIntent())


class ListAddItemIntent(intent.IntentHandler):
    """Handle ListAddItem intents."""

    intent_type = INTENT_LIST_ADD_ITEM
    description = "Add item to a todo list"
    slot_schema = {"item": intent.non_empty_string, "name": intent.non_empty_string}
    platforms = {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)
        item = slots["item"]["value"]
        list_name = slots["name"]["value"]

        component: EntityComponent[TodoListEntity] = hass.data[DOMAIN]
        target_list: TodoListEntity | None = None

        # Find matching list
        match_constraints = intent.MatchTargetsConstraints(
            name=list_name, domains=[DOMAIN], assistant=intent_obj.assistant
        )
        match_result = intent.async_match_targets(hass, match_constraints)
        if not match_result.is_match:
            raise intent.MatchFailedError(
                result=match_result, constraints=match_constraints
            )

        target_list = component.get_entity(match_result.states[0].entity_id)
        if target_list is None:
            raise intent.IntentHandleError(f"No to-do list: {list_name}")

        # Add to list
        await target_list.async_create_todo_item(
            TodoItem(summary=item, status=TodoItemStatus.NEEDS_ACTION)
        )

        response = intent_obj.create_response()
        response.response_type = intent.IntentResponseType.ACTION_DONE
        return response