/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * SPDX-License-Identifier: MIT-0
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

resource "aws_cloudwatch_metric_alarm" "auto_recovery_alarm" {
  count               = var.instance_count
  alarm_name          = "EC2AutoRecover-${aws_instance.linux-server[count.index].id}"
  comparison_operator = "GreaterThanOrEqualToThreshold"
  evaluation_periods  = "3"
  metric_name         = "StatusCheckFailed_System"
  namespace           = "AWS/EC2"
  period              = "60"
  statistic           = "Minimum"

  dimensions = {
    InstanceId = aws_instance.linux-server[count.index].id
  }

  alarm_actions = ["arn:aws:automate:${data.aws_region.current.name}:ec2:recover"]
  //todo add an SNS topic and in order to handle the notifications
  threshold         = "1"
  alarm_description = "Auto recover the EC2 instance if Status Check fails."
  tags              = merge(var.tags)
}