variable "name" {
  validation {
    condition     = can(regex("^[a-z][a-z0-9-]{1,45}[a-z0-9]$", var.name))
    error_message = "Expected a lowercase resource name."
  }
  type = string
}

variable "host_count" {
  validation {
    condition     = var.host_count >= 1 && var.host_count <= 6 && floor(var.host_count) == var.host_count
    error_message = "Use 1–6 hosts."
  }
  type = number
}

variable "vpc_cidr" {
  type = string
}

variable "deployment_bucket_name" {
  validation {
    condition     = can(regex("^[a-z0-9][a-z0-9.-]{1,61}[a-z0-9]$", var.deployment_bucket_name))
    error_message = "Expected an S3 bucket name."
  }
  type = string
}

variable "deployment_bucket_arn" {
  type = string
}

variable "deployment_region" {
  validation {
    condition     = can(regex("^[a-z]{2}-[a-z]+-[0-9]+$", var.deployment_region))
    error_message = "Expected an AWS region name."
  }
  type = string
}

variable "data_bucket_name" {
  validation {
    condition     = can(regex("^[a-z0-9][a-z0-9.-]{1,61}[a-z0-9]$", var.data_bucket_name))
    error_message = "Expected an S3 bucket name."
  }
  type = string
}

variable "data_bucket_arn" {
  type = string
}

variable "placement_region" {
  validation {
    condition     = can(regex("^[a-z][a-z0-9-]{0,31}$", var.placement_region))
    error_message = "Expected a lowercase placement region."
  }
  type = string
}

variable "release_public_key" {
  validation {
    condition     = can(regex("^[A-Za-z0-9+/]{42}[AEIMQUYcgkosw048]=$", var.release_public_key))
    error_message = "Expected a base64 32-byte Ed25519 public key."
  }
  type = string
}

variable "apps_domain" {
  validation {
    condition     = length(var.apps_domain) <= 253 && can(regex("^[a-z0-9]([a-z0-9-]*[a-z0-9])?(\\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)+$", var.apps_domain))
    error_message = "Expected a lowercase DNS domain without a scheme or path."
  }
  type = string
}

variable "instance_type" {
  type    = string
  default = "t4g.small"
}

variable "root_volume_gib" {
  type    = number
  default = 20
}