IAAS_VM_BACKUP_REQUEST = 'IaasVMBackupRequest'.freeze

module Fog
  module Storage
    class AzureRM
      # Real class for Recovery Vault request
      class Real
        def start_backup(resource_group, name, vm_name, vm_resource_group)
          msg = "Starting backup for VM #{vm_name}"
          Fog::Logger.debug msg

          job = get_backup_job_for_vm(name, resource_group, vm_name, vm_resource_group, 'Backup')

          unless job.nil?
            Fog::Logger.debug "Backup already in progress for VM #{vm_name} in Recovery Vault #{name}"
            return false
          end

          backup_items = get_backup_item(resource_group, name)
          backup_item = backup_items.select { |item| (item['properties']['friendlyName'].eql? vm_name.downcase) && (vm_resource_group.eql? get_resource_group_from_id(item['properties']['virtualMachineId'])) }[0]

          resource_url = "#{AZURE_RESOURCE}/subscriptions/#{@subscription_id}/resourceGroups/#{resource_group}/providers/Microsoft.RecoveryServices/vaults/#{name}/backupFabrics/Azure/protectionContainers/iaasvmcontainer;#{backup_item['name']}/protectedItems/vm;#{backup_item['name']}/backup?api-version=2016-05-01"
          body = {
            properties: {
              objectType: IAAS_VM_BACKUP_REQUEST
            }
          }
          begin
            token = Fog::Credentials::AzureRM.get_token(@tenant_id, @client_id, @client_secret)
            RestClient.post(
              resource_url,
              body.to_json,
              accept: 'application/json',
              content_type: 'application/json',
              authorization: token
            )
          rescue RestClient::Exception => e
            raise_azure_exception(e, msg)
          end
          Fog::Logger.debug "Successfully started backup for VM #{vm_name} in Recovery Vault #{name}"
          true
        end
      end

      # Mock class for Recovery Vault request
      class Mock
        def start_backup(*)
          Fog::Logger.debug 'Successfully started backup for VM {vm_name} in Recovery Vault {name}'
          true
        end
      end
    end
  end
end