"""Support for Dominos Pizza ordering."""
from datetime import timedelta
import logging

from pizzapi import Address, Customer, Order
from pizzapi.address import StoreException
import voluptuous as vol

from homeassistant.components import http
from homeassistant.core import callback
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.entity import Entity
from homeassistant.helpers.entity_component import EntityComponent
from homeassistant.util import Throttle

_LOGGER = logging.getLogger(__name__)

# The domain of your component. Should be equal to the name of your component.
DOMAIN = "dominos"
ENTITY_ID_FORMAT = DOMAIN + ".{}"

ATTR_COUNTRY = "country_code"
ATTR_FIRST_NAME = "first_name"
ATTR_LAST_NAME = "last_name"
ATTR_EMAIL = "email"
ATTR_PHONE = "phone"
ATTR_ADDRESS = "address"
ATTR_ORDERS = "orders"
ATTR_SHOW_MENU = "show_menu"
ATTR_ORDER_ENTITY = "order_entity_id"
ATTR_ORDER_NAME = "name"
ATTR_ORDER_CODES = "codes"

MIN_TIME_BETWEEN_UPDATES = timedelta(minutes=10)
MIN_TIME_BETWEEN_STORE_UPDATES = timedelta(minutes=3330)

_ORDERS_SCHEMA = vol.Schema(
    {
        vol.Required(ATTR_ORDER_NAME): cv.string,
        vol.Required(ATTR_ORDER_CODES): vol.All(cv.ensure_list, [cv.string]),
    }
)

CONFIG_SCHEMA = vol.Schema(
    {
        DOMAIN: vol.Schema(
            {
                vol.Required(ATTR_COUNTRY): cv.string,
                vol.Required(ATTR_FIRST_NAME): cv.string,
                vol.Required(ATTR_LAST_NAME): cv.string,
                vol.Required(ATTR_EMAIL): cv.string,
                vol.Required(ATTR_PHONE): cv.string,
                vol.Required(ATTR_ADDRESS): cv.string,
                vol.Optional(ATTR_SHOW_MENU): cv.boolean,
                vol.Optional(ATTR_ORDERS, default=[]): vol.All(
                    cv.ensure_list, [_ORDERS_SCHEMA]
                ),
            }
        )
    },
    extra=vol.ALLOW_EXTRA,
)


def setup(hass, config):
    """Set up is called when Home Assistant is loading our component."""
    dominos = Dominos(hass, config)

    component = EntityComponent(_LOGGER, DOMAIN, hass)
    hass.data[DOMAIN] = {}
    entities = []
    conf = config[DOMAIN]

    hass.services.register(DOMAIN, "order", dominos.handle_order)

    if conf.get(ATTR_SHOW_MENU):
        hass.http.register_view(DominosProductListView(dominos))

    for order_info in conf.get(ATTR_ORDERS):
        order = DominosOrder(order_info, dominos)
        entities.append(order)

    if entities:
        component.add_entities(entities)

    # Return boolean to indicate that initialization was successfully.
    return True


class Dominos:
    """Main Dominos service."""

    def __init__(self, hass, config):
        """Set up main service."""
        conf = config[DOMAIN]

        self.hass = hass
        self.customer = Customer(
            conf.get(ATTR_FIRST_NAME),
            conf.get(ATTR_LAST_NAME),
            conf.get(ATTR_EMAIL),
            conf.get(ATTR_PHONE),
            conf.get(ATTR_ADDRESS),
        )
        self.address = Address(
            *self.customer.address.split(","), country=conf.get(ATTR_COUNTRY)
        )
        self.country = conf.get(ATTR_COUNTRY)
        try:
            self.closest_store = self.address.closest_store()
        except StoreException:
            self.closest_store = None

    def handle_order(self, call):
        """Handle ordering pizza."""
        entity_ids = call.data.get(ATTR_ORDER_ENTITY)

        target_orders = [
            order
            for order in self.hass.data[DOMAIN]["entities"]
            if order.entity_id in entity_ids
        ]

        for order in target_orders:
            order.place()

    @Throttle(MIN_TIME_BETWEEN_STORE_UPDATES)
    def update_closest_store(self):
        """Update the shared closest store (if open)."""
        try:
            self.closest_store = self.address.closest_store()
            return True
        except StoreException:
            self.closest_store = None
            return False

    def get_menu(self):
        """Return the products from the closest stores menu."""
        self.update_closest_store()
        if self.closest_store is None:
            _LOGGER.warning("Cannot get menu. Store may be closed")
            return []
        menu = self.closest_store.get_menu()
        product_entries = []

        for product in menu.products:
            item = {}
            if isinstance(product.menu_data["Variants"], list):
                variants = ", ".join(product.menu_data["Variants"])
            else:
                variants = product.menu_data["Variants"]
            item["name"] = product.name
            item["variants"] = variants
            product_entries.append(item)

        return product_entries


class DominosProductListView(http.HomeAssistantView):
    """View to retrieve product list content."""

    url = "/api/dominos"
    name = "api:dominos"

    def __init__(self, dominos):
        """Initialize suite view."""
        self.dominos = dominos

    @callback
    def get(self, request):
        """Retrieve if API is running."""
        return self.json(self.dominos.get_menu())


class DominosOrder(Entity):
    """Represents a Dominos order entity."""

    def __init__(self, order_info, dominos):
        """Set up the entity."""
        self._name = order_info["name"]
        self._product_codes = order_info["codes"]
        self._orderable = False
        self.dominos = dominos

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

    @property
    def product_codes(self):
        """Return the orders product codes."""
        return self._product_codes

    @property
    def orderable(self):
        """Return the true if orderable."""
        return self._orderable

    @property
    def state(self):
        """Return the state either closed, orderable or unorderable."""
        if self.dominos.closest_store is None:
            return "closed"
        return "orderable" if self._orderable else "unorderable"

    @Throttle(MIN_TIME_BETWEEN_UPDATES)
    def update(self):
        """Update the order state and refreshes the store."""
        try:
            self.dominos.update_closest_store()
        except StoreException:
            self._orderable = False
            return

        try:
            order = self.order()
            order.pay_with()
            self._orderable = True
        except StoreException:
            self._orderable = False

    def order(self):
        """Create the order object."""
        if self.dominos.closest_store is None:
            raise StoreException

        order = Order(
            self.dominos.closest_store,
            self.dominos.customer,
            self.dominos.address,
            self.dominos.country,
        )

        for code in self._product_codes:
            order.add_item(code)

        return order

    def place(self):
        """Place the order."""
        try:
            order = self.order()
            order.place()
        except StoreException:
            self._orderable = False
            _LOGGER.warning(
                "Attempted to order Dominos - Order invalid or store closed"
            )
