// Copyright 2023 Greptime Team
//
// 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 greptime.v1.flow;

option java_package = "io.greptime.v1.flow";
option java_outer_classname = "Server";
option go_package = "github.com/GreptimeTeam/greptime-proto/go/greptime/v1/flow";

import "greptime/v1/common.proto";
import "greptime/v1/ddl.proto";
import "greptime/v1/row.proto";

service Flow {
  // Handle the control plane request for creating or removing a flow.
  rpc HandleCreateRemove(FlowRequest) returns (FlowResponse);
  // Handle the data plane request for inserting or deleting rows
  // only expect `RegionRequest` to be one of `InsertRequests` or
  // `DeleteRequests` other types of `RegionRequest` will be ignored
  rpc HandleMirrorRequest(InsertRequests) returns (FlowResponse);
}

message InsertRequests { repeated InsertRequest requests = 1; }

message InsertRequest {
  uint64 region_id = 1;
  Rows rows = 2;
}

message FlowRequest {
  oneof body {
    CreateRequest create = 1;
    RemoveRequest remove = 2;
  }
}

message FlowResponse {
  ResponseHeader header = 1;
  uint64 affected_rows = 2;
  map<string, bytes> extension = 3;
  // affected task ids
  repeated TaskId affected_tasks = 4;
}

// very similar to `ddl.CreateTaskExpr` just replace `task_name` with `task_id`
message CreateRequest {
  TaskId task_id = 1; 
  repeated TableId source_table_ids = 2;
  TableId sink_table_id = 3;
  bool create_if_not_exists = 4;
  string expire_when = 5;
  string comment = 6;
  string sql = 7;
  map<string, string> task_options = 8;
}

message RemoveRequest { TaskId task_id = 1; }

message TaskId { uint32 id = 1; }