/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.texera.amber.engine.architecture.controller.promisehandlers

import com.twitter.util.Future
import org.apache.texera.amber.engine.architecture.controller.{
  ControllerAsyncRPCHandlerInitializer,
  ExecutionStatsUpdate,
  RuntimeStatisticsPersist
}
import org.apache.texera.amber.engine.architecture.rpc.controlcommands.{
  AsyncRPCContext,
  WorkerStateUpdatedRequest
}
import org.apache.texera.amber.engine.architecture.rpc.controlreturns.EmptyReturn
import org.apache.texera.amber.util.VirtualIdentityUtils

/** indicate the state change of a worker
  *
  * possible sender: worker
  */
trait WorkerStateUpdatedHandler {
  this: ControllerAsyncRPCHandlerInitializer =>

  override def workerStateUpdated(
      msg: WorkerStateUpdatedRequest,
      ctx: AsyncRPCContext
  ): Future[EmptyReturn] = {
    val physicalOpId = VirtualIdentityUtils.getPhysicalOpId(ctx.sender)
    // set the state
    cp.workflowExecution.getRunningRegionExecutions
      .find(_.hasOperatorExecution(physicalOpId))
      .map(_.getOperatorExecution(physicalOpId))
      .foreach(operatorExecution =>
        operatorExecution.getWorkerExecution(ctx.sender).update(System.nanoTime(), msg.state)
      )
    val stats = cp.workflowExecution.getAllRegionExecutionsStats
    sendToClient(ExecutionStatsUpdate(stats))
    sendToClient(RuntimeStatisticsPersist(stats))
    EmptyReturn()
  }
}
