"""HTTP views to interact with the device registry."""
import voluptuous as vol

from homeassistant.components import websocket_api
from homeassistant.components.websocket_api.decorators import (
    async_response, require_admin)
from homeassistant.core import callback
from homeassistant.helpers.device_registry import async_get_registry

WS_TYPE_LIST = 'config/device_registry/list'
SCHEMA_WS_LIST = websocket_api.BASE_COMMAND_MESSAGE_SCHEMA.extend({
    vol.Required('type'): WS_TYPE_LIST,
})

WS_TYPE_UPDATE = 'config/device_registry/update'
SCHEMA_WS_UPDATE = websocket_api.BASE_COMMAND_MESSAGE_SCHEMA.extend({
    vol.Required('type'): WS_TYPE_UPDATE,
    vol.Required('device_id'): str,
    vol.Optional('area_id'): vol.Any(str, None),
    vol.Optional('name_by_user'): vol.Any(str, None),
})


async def async_setup(hass):
    """Enable the Device Registry views."""
    hass.components.websocket_api.async_register_command(
        WS_TYPE_LIST, websocket_list_devices,
        SCHEMA_WS_LIST
    )
    hass.components.websocket_api.async_register_command(
        WS_TYPE_UPDATE, websocket_update_device, SCHEMA_WS_UPDATE
    )
    return True


@async_response
async def websocket_list_devices(hass, connection, msg):
    """Handle list devices command."""
    registry = await async_get_registry(hass)
    connection.send_message(websocket_api.result_message(
        msg['id'], [_entry_dict(entry) for entry in registry.devices.values()]
    ))


@require_admin
@async_response
async def websocket_update_device(hass, connection, msg):
    """Handle update area websocket command."""
    registry = await async_get_registry(hass)

    msg.pop('type')
    msg_id = msg.pop('id')

    entry = registry.async_update_device(**msg)

    connection.send_message(websocket_api.result_message(
        msg_id, _entry_dict(entry)
    ))


@callback
def _entry_dict(entry):
    """Convert entry to API format."""
    return {
        'config_entries': list(entry.config_entries),
        'connections': list(entry.connections),
        'manufacturer': entry.manufacturer,
        'model': entry.model,
        'name': entry.name,
        'sw_version': entry.sw_version,
        'id': entry.id,
        'via_device_id': entry.via_device_id,
        'area_id': entry.area_id,
        'name_by_user': entry.name_by_user,
    }