#
# Author:: Chris Doherty <cdoherty@chef.io>)
# Copyright:: Copyright 2014-2016, Chef, Inc.
# License:: Apache License, Version 2.0
#
# 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.
#

require "chef/log"
require "chef/provider"

class Chef
  class Provider
    # Use the reboot resource to reboot a node, a necessary step with some
    # installations on certain platforms. This resource is supported for use on
    # the Microsoft Windows, macOS, and Linux platforms.
    #
    # In using this resource via notifications, it's important to *only* use
    # immediate notifications. Delayed notifications produce unintuitive and
    # probably undesired results.
    #
    # @since 12.0.0
    class Reboot < Chef::Provider
      provides :reboot

      # @return [void]
      def load_current_resource
        @current_resource ||= Chef::Resource::Reboot.new(new_resource.name)
        current_resource.reason(new_resource.reason)
        current_resource.delay_mins(new_resource.delay_mins)
        current_resource
      end

      # add a reboot to the node run_context
      # @return [void]
      def request_reboot
        node.run_context.request_reboot(
          delay_mins: new_resource.delay_mins,
          reason: new_resource.reason,
          timestamp: Time.now,
          requested_by: new_resource.name
          )
      end

      def action_request_reboot
        converge_by("request a system reboot to occur if the run succeeds") do
          logger.warn "Reboot requested:'#{new_resource.name}'"
          request_reboot
        end
      end

      def action_reboot_now
        converge_by("rebooting the system immediately") do
          logger.warn "Rebooting system immediately, requested by '#{new_resource.name}'"
          request_reboot
          throw :end_client_run_early
        end
      end

      def action_cancel
        converge_by("cancel any existing end-of-run reboot request") do
          logger.warn "Reboot canceled: '#{new_resource.name}'"
          node.run_context.cancel_reboot
        end
      end
    end
  end
end