"""Support for Abode Security System cameras."""
from datetime import timedelta
import logging

import abodepy.helpers.constants as CONST
import abodepy.helpers.timeline as TIMELINE
import requests

from homeassistant.components.camera import Camera
from homeassistant.util import Throttle

from . import AbodeDevice
from .const import DOMAIN

MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=90)

_LOGGER = logging.getLogger(__name__)


async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
    """Platform uses config entry setup."""
    pass


async def async_setup_entry(hass, config_entry, async_add_entities):
    """Set up a camera for an Abode device."""

    data = hass.data[DOMAIN]

    devices = []
    for device in data.abode.get_devices(generic_type=CONST.TYPE_CAMERA):
        devices.append(AbodeCamera(data, device, TIMELINE.CAPTURE_IMAGE))

    async_add_entities(devices)


class AbodeCamera(AbodeDevice, Camera):
    """Representation of an Abode camera."""

    def __init__(self, data, device, event):
        """Initialize the Abode device."""
        AbodeDevice.__init__(self, data, device)
        Camera.__init__(self)
        self._event = event
        self._response = None

    async def async_added_to_hass(self):
        """Subscribe Abode events."""
        await super().async_added_to_hass()

        self.hass.async_add_job(
            self._data.abode.events.add_timeline_callback,
            self._event,
            self._capture_callback,
        )

    def capture(self):
        """Request a new image capture."""
        return self._device.capture()

    @Throttle(MIN_TIME_BETWEEN_UPDATES)
    def refresh_image(self):
        """Find a new image on the timeline."""
        if self._device.refresh_image():
            self.get_image()

    def get_image(self):
        """Attempt to download the most recent capture."""
        if self._device.image_url:
            try:
                self._response = requests.get(self._device.image_url, stream=True)

                self._response.raise_for_status()
            except requests.HTTPError as err:
                _LOGGER.warning("Failed to get camera image: %s", err)
                self._response = None
        else:
            self._response = None

    def camera_image(self):
        """Get a camera image."""
        self.refresh_image()

        if self._response:
            return self._response.content

        return None

    def _capture_callback(self, capture):
        """Update the image with the device then refresh device."""
        self._device.update_image_location(capture)
        self.get_image()
        self.schedule_update_ha_state()