variables.tf

variable "use_existing_security_groups" {
  type        = bool
  description = "Flag to enable/disable creation of Security Group in the module. Set to `true` to disable Security Group creation and provide a list of existing security Group IDs in `existing_security_groups` to place the cluster into"
  default     = false
}

variable "existing_security_groups" {
  type        = list(string)
  default     = []
  description = "List of existing Security Group IDs to place the cluster into. Set `use_existing_security_groups` to `true` to enable using `existing_security_groups` as Security Groups for the cluster"
}

variable "allowed_security_groups" {
  type        = list(string)
  default     = []
  description = "List of Security Group IDs that are allowed ingress to the cluster's Security Group created in the module"
}

variable "allowed_cidr_blocks" {
  type        = list(string)
  default     = []
  description = "List of CIDR blocks that are allowed ingress to the cluster's Security Group created in the module"
}

variable "vpc_id" {
  type        = string
  description = "VPC ID"
}

variable "subnets" {
  type        = list(string)
  description = "Subnet IDs"
  default     = []
}

variable "elasticache_subnet_group_name" {
  type        = string
  description = "Subnet group name for the ElastiCache instance"
  default     = ""
}

variable "maintenance_window" {
  type        = string
  default     = "wed:03:00-wed:04:00"
  description = "Maintenance window"
}

variable "cluster_size" {
  type        = number
  default     = 1
  description = "Number of nodes in cluster. *Ignored when `cluster_mode_enabled` == `true`*"
}

variable "port" {
  type        = number
  default     = 6379
  description = "Redis port"
}

variable "instance_type" {
  type        = string
  default     = "cache.t2.micro"
  description = "Elastic cache instance type"
}

variable "family" {
  type        = string
  default     = "redis4.0"
  description = "Redis family"
}

variable "parameter" {
  type = list(object({
    name  = string
    value = string
  }))
  default     = []
  description = "A list of Redis parameters to apply. Note that parameters may differ from one Redis family to another"
}

variable "engine_version" {
  type        = string
  default     = "4.0.10"
  description = "Redis engine version"
}

variable "at_rest_encryption_enabled" {
  type        = bool
  default     = false
  description = "Enable encryption at rest"
}

variable "transit_encryption_enabled" {
  type        = bool
  default     = true
  description = "Enable TLS"
}

variable "notification_topic_arn" {
  type        = string
  default     = ""
  description = "Notification topic arn"
}

variable "alarm_cpu_threshold_percent" {
  type        = number
  default     = 75
  description = "CPU threshold alarm level"
}

variable "alarm_memory_threshold_bytes" {
  # 10MB
  type        = number
  default     = 10000000
  description = "Ram threshold alarm level"
}

variable "alarm_actions" {
  type        = list(string)
  description = "Alarm action list"
  default     = []
}

variable "ok_actions" {
  type        = list(string)
  description = "The list of actions to execute when this alarm transitions into an OK state from any other state. Each action is specified as an Amazon Resource Number (ARN)"
  default     = []
}

variable "apply_immediately" {
  type        = bool
  default     = true
  description = "Apply changes immediately"
}

variable "automatic_failover_enabled" {
  type        = bool
  default     = false
  description = "Automatic failover (Not available for T1/T2 instances)"
}

variable "availability_zones" {
  type        = list(string)
  description = "Availability zone IDs"
  default     = []
}

variable "zone_id" {
  type        = string
  default     = ""
  description = "Route53 DNS Zone ID"
}

variable "dns_subdomain" {
  type        = string
  default     = ""
  description = "The subdomain to use for the CNAME record. If not provided then the CNAME record will use var.name."
}

variable "auth_token" {
  type        = string
  description = "Auth token for password protecting redis, `transit_encryption_enabled` must be set to `true`. Password must be longer than 16 chars"
  default     = null
}

variable "kms_key_id" {
  type        = string
  description = "The ARN of the key that you wish to use if encrypting at rest. If not supplied, uses service managed encryption. `at_rest_encryption_enabled` must be set to `true`"
  default     = null
}

variable "replication_group_id" {
  type        = string
  description = "Replication group ID with the following constraints: \nA name must contain from 1 to 20 alphanumeric characters or hyphens. \n The first character must be a letter. \n A name cannot end with a hyphen or contain two consecutive hyphens."
  default     = ""
}

variable "snapshot_arns" {
  type        = list(string)
  description = "A single-element string list containing an Amazon Resource Name (ARN) of a Redis RDB snapshot file stored in Amazon S3. Example: arn:aws:s3:::my_bucket/snapshot1.rdb"
  default     = []
}


variable "snapshot_name" {
  type        = string
  description = "The name of a snapshot from which to restore data into the new node group. Changing the snapshot_name forces a new resource."
  default     = null
}

variable "snapshot_window" {
  type        = string
  description = "The daily time range (in UTC) during which ElastiCache will begin taking a daily snapshot of your cache cluster."
  default     = "06:30-07:30"
}

variable "snapshot_retention_limit" {
  type        = number
  description = "The number of days for which ElastiCache will retain automatic cache cluster snapshots before deleting them."
  default     = 0
}

variable "cluster_mode_enabled" {
  type        = bool
  description = "Flag to enable/disable creation of a native redis cluster. `automatic_failover_enabled` must be set to `true`. Only 1 `cluster_mode` block is allowed"
  default     = false
}

variable "cluster_mode_replicas_per_node_group" {
  type        = number
  description = "Number of replica nodes in each node group. Valid values are 0 to 5. Changing this number will force a new resource"
  default     = 0
}

variable "cluster_mode_num_node_groups" {
  type        = number
  description = "Number of node groups (shards) for this Redis replication group. Changing this number will trigger an online resizing operation before other settings modifications"
  default     = 0
}

variable "cloudwatch_metric_alarms_enabled" {
  type        = bool
  description = "Boolean flag to enable/disable CloudWatch metrics alarms"
  default     = false
}

variable egress_cidr_blocks {
  type        = list
  default     = ["0.0.0.0/0"]
  description = "Outbound traffic address"
}