# Copyright 2013-2014 Aerospike, 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.

module Aerospike

  private

  # ExecuteTask is used to poll for long running server execute job completion.
  class ExecuteTask < Task

    # NewExecuteTask initializes task with fields needed to query server nodes.
    def initialize(cluster, statement)
      super(cluster, false)

      @task_id = statement.task_id
      @scan = statement.is_scan?

      self
    end

    # IsDone queries all nodes for task completion status.
    def all_nodes_done?

      if @scan
        command = 'scan-list'
      else
        command = 'query-list'
      end

      nodes = @cluster.nodes
      done = false

      nodes.each do |node|
        conn = node.get_connection(0)
        responseMap, _ = Info.request(conn, command)
        node.put_connection(conn)

        response = responseMap[command]
        find = "job_id=#{@task_id}:"
        index = response.index(find)

        unless index
          # don't return on first check
          done = true
          next
        end

        b = index + find.length
        response = response[b, response.length]
        find = 'job_status='
        index = response.index(find)

        next unless index

        b = index + find.length
        response = response[b, response.length]
        e = response.index(':')
        status = response[0, e]

        case status
        when 'ABORTED'
          raise raise Aerospike::Exceptions::QueryTerminated
        when 'IN PROGRESS'
          return false
        when 'DONE'
          done = true
        end
      end

      done
    end

  end
end