# Monitoring Api Gateway latency
resource "datadog_monitor" "API_Gateway_latency" {
  count   = var.latency_enabled == "true" ? 1 : 0
  name    = "${var.prefix_slug == "" ? "" : "[${var.prefix_slug}]"}[${var.environment}] API Gateway latency {{#is_alert}}{{{comparator}}} {{threshold}}ms ({{value}}ms){{/is_alert}}{{#is_warning}}{{{comparator}}} {{warn_threshold}}ms ({{value}}ms){{/is_warning}}"
  message = coalesce(var.latency_message, var.message)
  type    = "query alert"

  query = <<EOQ
    ${var.latency_time_aggregator}(${var.latency_timeframe}):
      default(avg:aws.apigateway.latency{${var.filter_tags}} by {region,apiname,stage}, 0)
    > ${var.latency_threshold_critical}
EOQ

  thresholds = {
    warning  = var.latency_threshold_warning
    critical = var.latency_threshold_critical
  }

  evaluation_delay    = var.evaluation_delay
  new_host_delay      = var.new_host_delay
  notify_no_data      = false
  renotify_interval   = 0
  require_full_window = false
  timeout_h           = 0
  include_tags        = true

  tags = concat(["env:${var.environment}", "type:cloud", "provider:aws", "resource:apigateway", "team:claranet", "created-by:terraform"], var.latency_extra_tags)

  lifecycle {
    ignore_changes = ["silenced"]
  }
}

# Monitoring API Gateway 5xx errors percent
resource "datadog_monitor" "API_http_5xx_errors_count" {
  count   = var.http_5xx_requests_enabled == "true" ? 1 : 0
  name    = "${var.prefix_slug == "" ? "" : "[${var.prefix_slug}]"}[${var.environment}] API Gateway HTTP 5xx errors {{#is_alert}}{{{comparator}}} {{threshold}}% ({{value}}%){{/is_alert}}{{#is_warning}}{{{comparator}}} {{warn_threshold}}% ({{value}}%){{/is_warning}}"
  message = coalesce(var.http_5xx_requests_message, var.message)
  type    = "query alert"

  query = <<EOQ
    ${var.http_5xx_requests_time_aggregator}(${var.http_5xx_requests_timeframe}):
      default(avg:aws.apigateway.5xxerror{${var.filter_tags}} by {region,apiname,stage}.as_rate(), 0) / (
      default(avg:aws.apigateway.count{${var.filter_tags}} by {region,apiname,stage}.as_rate() + ${var.artificial_requests_count}, 1))
      * 100 > ${var.http_5xx_requests_threshold_critical}
EOQ

  thresholds = {
    warning  = var.http_5xx_requests_threshold_warning
    critical = var.http_5xx_requests_threshold_critical
  }

  evaluation_delay    = var.evaluation_delay
  new_host_delay      = var.new_host_delay
  notify_no_data      = false
  renotify_interval   = 0
  require_full_window = false
  timeout_h           = 1
  include_tags        = true

  tags = concat(["env:${var.environment}", "type:cloud", "provider:aws", "resource:apigateway", "team:claranet", "created-by:terraform"], var.http_5xx_requests_extra_tags)

  lifecycle {
    ignore_changes = ["silenced"]
  }
}

# Monitoring API Gateway 4xx errors percent
resource "datadog_monitor" "API_http_4xx_errors_count" {
  count   = var.http_4xx_requests_enabled == "true" ? 1 : 0
  name    = "${var.prefix_slug == "" ? "" : "[${var.prefix_slug}]"}[${var.environment}] API Gateway HTTP 4xx errors {{#is_alert}}{{{comparator}}} {{threshold}}% ({{value}}%){{/is_alert}}{{#is_warning}}{{{comparator}}} {{warn_threshold}}% ({{value}}%){{/is_warning}}"
  message = coalesce(var.http_4xx_requests_message, var.message)
  type    = "query alert"

  query = <<EOQ
    ${var.http_4xx_requests_time_aggregator}(${var.http_4xx_requests_timeframe}):
      default(avg:aws.apigateway.4xxerror{${var.filter_tags}} by {region,apiname,stage}.as_rate(), 0) / (
      default(avg:aws.apigateway.count{${var.filter_tags}} by {region,apiname,stage}.as_rate() + ${var.artificial_requests_count}, 1))
      * 100 > ${var.http_4xx_requests_threshold_critical}
EOQ

  thresholds = {
    warning  = var.http_4xx_requests_threshold_warning
    critical = var.http_4xx_requests_threshold_critical
  }

  evaluation_delay    = var.evaluation_delay
  new_host_delay      = var.new_host_delay
  notify_no_data      = false
  renotify_interval   = 0
  require_full_window = false
  timeout_h           = 1
  include_tags        = true

  tags = concat(["env:${var.environment}", "type:cloud", "provider:aws", "resource:apigateway", "team:claranet", "created-by:terraform"], var.http_4xx_requests_extra_tags)

  lifecycle {
    ignore_changes = ["silenced"]
  }
}