data "template_file" "filter" {
  template = "$${filter}"

  vars {
    filter = "${var.use_filter_tags == "true" ? format("dd_monitoring:enabled,dd_azure_eventhub:enabled,env:%s", var.environment) : "*"}"
  }
}


resource "datadog_monitor" "eventhub_status" {
  name    = "[${var.environment}] Event Hub status"
  message = "${var.down_message}"

  query = <<EOF
      avg(last_5m): avg:azure.eventhub_namespaces.status{${data.template_file.filter.rendered}} by {name,resource_group,region} != 1
      EOF
  type  = "metric alert"

  notify_no_data      = true
  evaluation_delay    = "${var.delay}"
  renotify_interval   = 60
  notify_audit        = false
  timeout_h           = 0
  include_tags        = true
  locked              = false
  require_full_window = true
  new_host_delay      = "${var.delay}"
  no_data_timeframe   = 20
}

resource "datadog_monitor" "eventhub_failed_requests" {
  name    = "[${var.environment}] Event Hub failed requests"
  message = "${var.failed_requests_message}"

  query = <<EOF
        avg(last_5m): (
          avg:azure.eventhub_namespaces.failed_requests{${data.template_file.filter.rendered}} by {name,resource_group,region}
        ) * 100 / (
          avg:azure.eventhub_namespaces.successful_requests{${data.template_file.filter.rendered}} by {name,resource_group,region} +
          avg:azure.eventhub_namespaces.failed_requests{${data.template_file.filter.rendered}} by {name,resource_group,region}
        ) > ${var.failed_requests_rate_thresold_critical}
        EOF
  type  = "query alert"

  thresholds {
    critical = "${var.failed_requests_rate_thresold_critical}"
    warning  = "${var.failed_requests_rate_thresold_warning}"
  }

  notify_no_data      = false
  evaluation_delay    = "${var.delay}"
  renotify_interval   = 60
  notify_audit        = false
  timeout_h           = 0
  include_tags        = true
  locked              = false
  require_full_window = true
  new_host_delay      = "${var.delay}"
  no_data_timeframe   = 20
}

resource "datadog_monitor" "eventhub_errors" {
  name    = "[${var.environment}] Event Hub errors"
  message = "${var.errors_message}"

  query = <<EOF
        avg(last_5m): (
          avg:azure.eventhub_namespaces.internal_server_errors{${data.template_file.filter.rendered}} by {name,resource_group,region} +
          avg:azure.eventhub_namespaces.server_busy_errors{${data.template_file.filter.rendered}} by {name,resource_group,region} +
          avg:azure.eventhub_namespaces.other_errors{${data.template_file.filter.rendered}} by {name,resource_group,region}
        ) * 100 / (
          avg:azure.eventhub_namespaces.successful_requests{${data.template_file.filter.rendered}} by {name,resource_group,region} +
          avg:azure.eventhub_namespaces.internal_server_errors{${data.template_file.filter.rendered}} by {name,resource_group,region} +
          avg:azure.eventhub_namespaces.server_busy_errors{${data.template_file.filter.rendered}} by {name,resource_group,region} +
          avg:azure.eventhub_namespaces.other_errors{${data.template_file.filter.rendered}} by {name,resource_group,region}
        ) > ${var.errors_rate_thresold_critical}
        EOF
  type  = "query alert"

  thresholds {
    critical = "${var.errors_rate_thresold_critical}"
    warning  = "${var.errors_rate_thresold_warning}"
  }

  notify_no_data      = false
  evaluation_delay    = "${var.delay}"
  renotify_interval   = 60
  notify_audit        = false
  timeout_h           = 0
  include_tags        = true
  locked              = false
  require_full_window = true
  new_host_delay      = "${var.delay}"
  no_data_timeframe   = 20
}