# -*- coding: utf-8 -*-
# Copyright 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging

from twisted.internet import defer

from synapse.api.errors import StoreError
from ._base import SQLBaseStore

logger = logging.getLogger(__name__)


class DeviceStore(SQLBaseStore):
    @defer.inlineCallbacks
    def store_device(self, user_id, device_id,
                     initial_device_display_name,
                     ignore_if_known=True):
        """Ensure the given device is known; add it to the store if not

        Args:
            user_id (str): id of user associated with the device
            device_id (str): id of device
            initial_device_display_name (str): initial displayname of the
               device
            ignore_if_known (bool): ignore integrity errors which mean the
               device is already known
        Returns:
            defer.Deferred
        Raises:
            StoreError: if ignore_if_known is False and the device was already
               known
        """
        try:
            yield self._simple_insert(
                "devices",
                values={
                    "user_id": user_id,
                    "device_id": device_id,
                    "display_name": initial_device_display_name
                },
                desc="store_device",
                or_ignore=ignore_if_known,
            )
        except Exception as e:
            logger.error("store_device with device_id=%s(%r) user_id=%s(%r)"
                         " display_name=%s(%r) failed: %s",
                         type(device_id).__name__, device_id,
                         type(user_id).__name__, user_id,
                         type(initial_device_display_name).__name__,
                         initial_device_display_name, e)
            raise StoreError(500, "Problem storing device.")

    def get_device(self, user_id, device_id):
        """Retrieve a device.

        Args:
            user_id (str): The ID of the user which owns the device
            device_id (str): The ID of the device to retrieve
        Returns:
            defer.Deferred for a dict containing the device information
        Raises:
            StoreError: if the device is not found
        """
        return self._simple_select_one(
            table="devices",
            keyvalues={"user_id": user_id, "device_id": device_id},
            retcols=("user_id", "device_id", "display_name"),
            desc="get_device",
        )

    def delete_device(self, user_id, device_id):
        """Delete a device.

        Args:
            user_id (str): The ID of the user which owns the device
            device_id (str): The ID of the device to delete
        Returns:
            defer.Deferred
        """
        return self._simple_delete_one(
            table="devices",
            keyvalues={"user_id": user_id, "device_id": device_id},
            desc="delete_device",
        )

    def update_device(self, user_id, device_id, new_display_name=None):
        """Update a device.

        Args:
            user_id (str): The ID of the user which owns the device
            device_id (str): The ID of the device to update
            new_display_name (str|None): new displayname for device; None
               to leave unchanged
        Raises:
            StoreError: if the device is not found
        Returns:
            defer.Deferred
        """
        updates = {}
        if new_display_name is not None:
            updates["display_name"] = new_display_name
        if not updates:
            return defer.succeed(None)
        return self._simple_update_one(
            table="devices",
            keyvalues={"user_id": user_id, "device_id": device_id},
            updatevalues=updates,
            desc="update_device",
        )

    @defer.inlineCallbacks
    def get_devices_by_user(self, user_id):
        """Retrieve all of a user's registered devices.

        Args:
            user_id (str):
        Returns:
            defer.Deferred: resolves to a dict from device_id to a dict
            containing "device_id", "user_id" and "display_name" for each
            device.
        """
        devices = yield self._simple_select_list(
            table="devices",
            keyvalues={"user_id": user_id},
            retcols=("user_id", "device_id", "display_name"),
            desc="get_devices_by_user"
        )

        defer.returnValue({d["device_id"]: d for d in devices})