"""Support for Blink Home Camera System."""
from copy import deepcopy
import logging

from blinkpy.auth import Auth
from blinkpy.blinkpy import Blink
import voluptuous as vol

from homeassistant.components import persistent_notification
from homeassistant.config_entries import SOURCE_REAUTH
from homeassistant.const import CONF_FILENAME, CONF_NAME, CONF_PIN, CONF_SCAN_INTERVAL
from homeassistant.core import callback
from homeassistant.exceptions import ConfigEntryNotReady
from homeassistant.helpers import config_validation as cv

from .const import (
    DEFAULT_SCAN_INTERVAL,
    DOMAIN,
    PLATFORMS,
    SERVICE_REFRESH,
    SERVICE_SAVE_VIDEO,
    SERVICE_SEND_PIN,
)

_LOGGER = logging.getLogger(__name__)

SERVICE_SAVE_VIDEO_SCHEMA = vol.Schema(
    {vol.Required(CONF_NAME): cv.string, vol.Required(CONF_FILENAME): cv.string}
)
SERVICE_SEND_PIN_SCHEMA = vol.Schema({vol.Optional(CONF_PIN): cv.string})


def _blink_startup_wrapper(hass, entry):
    """Startup wrapper for blink."""
    blink = Blink()
    auth_data = deepcopy(dict(entry.data))
    blink.auth = Auth(auth_data, no_prompt=True)
    blink.refresh_rate = entry.options.get(CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL)

    if blink.start():
        blink.setup_post_verify()
    elif blink.auth.check_key_required():
        _LOGGER.debug("Attempting a reauth flow")
        _reauth_flow_wrapper(hass, auth_data)

    return blink


def _reauth_flow_wrapper(hass, data):
    """Reauth flow wrapper."""
    hass.add_job(
        hass.config_entries.flow.async_init(
            DOMAIN, context={"source": SOURCE_REAUTH}, data=data
        )
    )
    persistent_notification.async_create(
        hass,
        "Blink configuration migrated to a new version. Please go to the integrations page to re-configure (such as sending a new 2FA key).",
        "Blink Migration",
    )


async def async_migrate_entry(hass, entry):
    """Handle migration of a previous version config entry."""
    _LOGGER.debug("Migrating from version %s", entry.version)
    data = {**entry.data}
    if entry.version == 1:
        data.pop("login_response", None)
        await hass.async_add_executor_job(_reauth_flow_wrapper, hass, data)
        return False
    if entry.version == 2:
        await hass.async_add_executor_job(_reauth_flow_wrapper, hass, data)
        return False
    return True


async def async_setup_entry(hass, entry):
    """Set up Blink via config entry."""
    hass.data.setdefault(DOMAIN, {})

    _async_import_options_from_data_if_missing(hass, entry)
    hass.data[DOMAIN][entry.entry_id] = await hass.async_add_executor_job(
        _blink_startup_wrapper, hass, entry
    )

    if not hass.data[DOMAIN][entry.entry_id].available:
        raise ConfigEntryNotReady

    hass.config_entries.async_setup_platforms(entry, PLATFORMS)

    def blink_refresh(event_time=None):
        """Call blink to refresh info."""
        hass.data[DOMAIN][entry.entry_id].refresh(force_cache=True)

    async def async_save_video(call):
        """Call save video service handler."""
        await async_handle_save_video_service(hass, entry, call)

    def send_pin(call):
        """Call blink to send new pin."""
        pin = call.data[CONF_PIN]
        hass.data[DOMAIN][entry.entry_id].auth.send_auth_key(
            hass.data[DOMAIN][entry.entry_id],
            pin,
        )

    hass.services.async_register(DOMAIN, SERVICE_REFRESH, blink_refresh)
    hass.services.async_register(
        DOMAIN, SERVICE_SAVE_VIDEO, async_save_video, schema=SERVICE_SAVE_VIDEO_SCHEMA
    )
    hass.services.async_register(
        DOMAIN, SERVICE_SEND_PIN, send_pin, schema=SERVICE_SEND_PIN_SCHEMA
    )

    return True


@callback
def _async_import_options_from_data_if_missing(hass, entry):
    options = dict(entry.options)
    if CONF_SCAN_INTERVAL not in entry.options:
        options[CONF_SCAN_INTERVAL] = entry.data.get(
            CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL
        )
        hass.config_entries.async_update_entry(entry, options=options)


async def async_unload_entry(hass, entry):
    """Unload Blink entry."""
    unload_ok = await hass.config_entries.async_unload_platforms(entry, PLATFORMS)

    if not unload_ok:
        return False

    hass.data[DOMAIN].pop(entry.entry_id)

    if len(hass.data[DOMAIN]) != 0:
        return True

    hass.services.async_remove(DOMAIN, SERVICE_REFRESH)
    hass.services.async_remove(DOMAIN, SERVICE_SAVE_VIDEO)
    hass.services.async_remove(DOMAIN, SERVICE_SEND_PIN)

    return True


async def async_handle_save_video_service(hass, entry, call):
    """Handle save video service calls."""
    camera_name = call.data[CONF_NAME]
    video_path = call.data[CONF_FILENAME]
    if not hass.config.is_allowed_path(video_path):
        _LOGGER.error("Can't write %s, no access to path!", video_path)
        return

    def _write_video(camera_name, video_path):
        """Call video write."""
        all_cameras = hass.data[DOMAIN][entry.entry_id].cameras
        if camera_name in all_cameras:
            all_cameras[camera_name].video_to_file(video_path)

    try:
        await hass.async_add_executor_job(_write_video, camera_name, video_path)
    except OSError as err:
        _LOGGER.error("Can't write image to file: %s", err)
