// Copyright 2018 Google Inc.
//
// 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.

syntax = "proto3";

package google.home.graph.v1;

import "google/api/annotations.proto";
import "google/home/graph/v1/device.proto";
import "google/protobuf/empty.proto";
import "google/protobuf/struct.proto";

option go_package = "google.golang.org/genproto/googleapis/home/graph/v1;graph";
option java_outer_classname = "HomeGraphApiServiceProto";
option java_package = "com.google.home.graph.v1";

// Google HomeGraph API. HomeGraph Service provides the support for storing
// and querying first-party and third-party devices, rooms and structures,
// the relationships among them and their state in the home. It stores
// entities and their relationships in the home.
service HomeGraphApiService {
  // Requests a Sync call from Google to a 3p partner's home control agent for
  // a user.
  //
  //
  // Third-party user's identity is passed in as agent_user_id.
  // (see
  // [RequestSyncDevicesRequest][google.home.graph.v1.RequestSyncDevicesRequest])
  // and forwarded back to the agent. Agent is identified by the API key or JWT
  // signed by the partner's service account.
  rpc RequestSyncDevices(RequestSyncDevicesRequest)
      returns (RequestSyncDevicesResponse) {
    option (google.api.http) = {
      post: "/v1/devices:requestSync"
      body: "*"
    };
  }

  // Reports device state and optionally sends device notifications. Called by
  // an agent when the device state of a third-party changes or the agent wants
  // to send a notification about the device.
  // This method updates a predefined set of States for a device, which all
  // devices have (for example a light will have OnOff, Color, Brightness).
  // A new State may not be created and an INVALID_ARGUMENT code will be thrown
  // if so. It also optionally takes in a list of Notifications that may be
  // created, which are associated to this State change.
  //
  // Third-party user's identity is passed in as agent_user_id.
  // Agent is identified by the JWT signed by the partner's service account.
  rpc ReportStateAndNotification(ReportStateAndNotificationRequest)
      returns (ReportStateAndNotificationResponse) {
    option (google.api.http) = {
      post: "/v1/devices:reportStateAndNotification"
      body: "*"
    };
  }

  // Unlink an agent user from Google. As result, all data related to this user
  // will be deleted.
  //
  // Here is how the agent user is created in Google:
  // When users open their Google Home App, they can begin linking a 3p
  // partner. User is guided through the OAuth process. After entering the 3p
  // credentials, Google gets the 3p OAuth token, and uses it to make a
  // Sync call to the 3p partner and gets back all the user's data, including
  // agent_user_id and devices.
  // Google then creates the agent user and stores a mapping from the
  // agent_user_id -> Google ID mapping. Google also stores all user's devices
  // under that Google ID.
  // The mapping from agent_user_id -> Google ID is many to many, since one
  // Google user can have multiple 3p accounts, and multiple Google users can
  // map to one agent_user_id (e.g. husband and wife share one Nest account
  // username/password).
  //
  // Third-party user's identity is passed in as agent_user_id
  // Agent is identified by the JWT signed by the partner's service account.
  //
  // Note: Special characters (except "/") in agent_user_id must be URL encoded.
  rpc DeleteAgentUser(DeleteAgentUserRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      delete: "/v1/{agent_user_id=agentUsers/**}"
    };
  }

  // Gets the device states for the devices in QueryRequest.
  // Third-party user's identity is passed in as agent_user_id. Agent is
  // identified by the JWT signed by the third-party partner's service account.
  rpc Query(QueryRequest) returns (QueryResponse) {
    option (google.api.http) = {
      post: "/v1/devices:query"
      body: "*"
    };
  }

  // Gets all the devices associated with the given third-party user.
  // Third-party user's identity is passed in as agent_user_id. Agent is
  // identified by the JWT signed by the third-party partner's service account.
  rpc Sync(SyncRequest) returns (SyncResponse) {
    option (google.api.http) = {
      post: "/v1/devices:sync"
      body: "*"
    };
  }
}

// Request type for RequestSyncDevices call.
message RequestSyncDevicesRequest {
  // Required. Third-party user id issued by agent's third-party identity
  // provider.
  string agent_user_id = 1;

  // Optional. If set, the request will be added to a queue and a response will
  // be returned immediately. The queue allows for de-duplication of
  // simultaneous requests.
  bool async = 2;
}

// Response type for RequestSyncDevices call. Intentionally empty upon success.
// An HTTP response code is returned with more details upon failure.
message RequestSyncDevicesResponse {}

// Sample ReportStateAndNotificationRequest, with states and notifications
// defined per device_id (eg: "123" and "456" in the following example):
// {
//   "requestId": "ff36a3cc-ec34-11e6-b1a0-64510650abcf",
//   "agentUserId": "1234",
//   "payload": {
//     "devices": {
//       "states": {
//         "123": {
//           "on": true
//         },
//         "456": {
//           "on": true,
//           "brightness": 10
//         }
//       },
//       "notifications": {
//         "123": {
//           "ObjectDetected": {
//             "priority": 0,
//             "objects": {
//               "NAMED": ["Alice", "Bob", "Carol", "Eve"]
//             }
//           },
//           "DoorUnlocked": {
//             "priority": 0,
//             "keyUsed": {
//               "keyName": "Wife's key"
//             }
//           }
//         },
//         "456": {
//           "SprinklersOn": {
//             "priority": 0,
//             "timeStarted": "1513792702"
//           }
//         }
//       }
//     }
//   }
// }
// Request type for ReportStateAndNotification call. It may include States,
// Notifications, or both. This request uses globally unique flattened state
// names instead of namespaces based on traits to align with the existing QUERY
// and EXECUTE APIs implemented by 90+ Smart Home partners.
// Next tag: 6.
message ReportStateAndNotificationRequest {
  // Request id used for debugging.
  string request_id = 1;

  // Unique identifier per event (eg: doorbell press).
  string event_id = 4;

  // Required. Third-party user id.
  string agent_user_id = 2;

  // Token to maintain state in the follow up notification response.
  string follow_up_token = 5;

  // State of devices to update and notification metadata for devices. For
  // example, if a user turns a light on manually, a State update should be
  // sent so that the information is always the current status of the device.
  // Notifications are independent from the state and its piece of the payload
  // should contain everything necessary to notify the user. Although it may be
  // related to a state change, it does not need to be. For example, if a
  // device can turn on/off and change temperature, the states reported would
  // include both "on" and "70 degrees" but the 3p may choose not to send any
  // notification for that, or to only say that the "the room is heating up",
  // keeping state and notification independent.
  StateAndNotificationPayload payload = 3;
}

// Response type for ReportStateAndNotification call.
message ReportStateAndNotificationResponse {
  // Request id copied from ReportStateAndNotificationRequest.
  string request_id = 1;
}

// Payload containing the State and Notification information for devices.
message StateAndNotificationPayload {
  // The devices for updating State and sending Notifications.
  ReportStateAndNotificationDevice devices = 1;
}

// The States and Notifications specific to a device.
message ReportStateAndNotificationDevice {
  // States of devices to update.
  google.protobuf.Struct states = 1;

  // Notifications metadata for devices.
  google.protobuf.Struct notifications = 2;
}

// Request type for DeleteAgentUser call.
message DeleteAgentUserRequest {
  // Request id used for debugging.
  string request_id = 1;

  // Required. Third-party user id.
  string agent_user_id = 2;
}

// Request type for Query call. This should be the same format as the AoG
// action.devices.QUERY request
// (https://developers.google.com/actions/smarthome/create-app#actiondevicesquery)
// with the exception of the extra "agent_user_id" and no "intent" and
// "customData" field.
message QueryRequest {
  // Request ID used for debugging.
  string request_id = 1;

  // Required. Third-party user ID.
  string agent_user_id = 2;

  // Required. Inputs containing third-party partner's device IDs for which to
  // get the device states.
  repeated QueryRequestInput inputs = 3;
}

// Device ID inputs to QueryRequest.
message QueryRequestInput {
  // Payload containing third-party partner's device IDs.
  QueryRequestPayload payload = 1;
}

// Payload containing device IDs.
message QueryRequestPayload {
  // Third-party partner's device IDs to get device states for.
  repeated AgentDeviceId devices = 1;
}

// Third-party partner's device ID for one device.
message AgentDeviceId {
  // Third-party partner's device ID.
  string id = 1;
}

// Response type for Query call. This should follow the same format as AoG
// action.devices.QUERY response
// (https://developers.google.com/actions/smarthome/create-app#actiondevicesquery).
message QueryResponse {
  // Request ID used for debugging. Copied from the request.
  string request_id = 1;

  // Device states for the devices given in the request.
  QueryResponsePayload payload = 2;
}

// Payload containing device states information.
message QueryResponsePayload {
  // States of the devices. Map of third-party device ID to struct of device
  // states.
  map<string, google.protobuf.Struct> devices = 1;
}

// Request type for Sync call. This should follow the same format as AoG
// action.devices.SYNC request
// (https://developers.google.com/actions/smarthome/create-app#actiondevicessync)
// with the exception of the extra "agent_user_id" and no "intent" field.
message SyncRequest {
  // Request ID used for debugging.
  string request_id = 1;

  // Required. Third-party user ID.
  string agent_user_id = 2;
}

// Example SyncResponse:
// {
//   "requestId": "ff36a3cc-ec34-11e6-b1a0-64510650abcf",
//   "payload": {
//     "agentUserId": "1836.15267389",
//     "devices": [{
//       "id": "123",
//       "type": "action.devices.types.OUTLET",
//       "traits": [
//         "action.devices.traits.OnOff"
//       ],
//       "name": {
//         "defaultNames": ["My Outlet 1234"],
//         "name": "Night light",
//         "nicknames": ["wall plug"]
//       },
//       "willReportState": false,
//       "deviceInfo": {
//         "manufacturer": "lights-out-inc",
//         "model": "hs1234",
//         "hwVersion": "3.2",
//         "swVersion": "11.4"
//       },
//       "customData": {
//         "fooValue": 74,
//         "barValue": true,
//         "bazValue": "foo"
//       }
//     }]
//   }
// }
//
// Response type for Sync call. This should follow the same format as AoG
// action.devices.SYNC response
// (https://developers.google.com/actions/smarthome/create-app#actiondevicessync).
message SyncResponse {
  // Request ID used for debugging. Copied from the request.
  string request_id = 1;

  // Devices associated with the third-party user.
  SyncResponsePayload payload = 2;
}

// Payload containing device information.
message SyncResponsePayload {
  // Third-party user ID
  string agent_user_id = 1;

  // Devices associated with the third-party user.
  repeated google.home.graph.v1.Device devices = 2;
}