variable "aws_region" {
  type        = string
  default     = "us-west-2"
  description = "AWS region."
}

variable "name" {
  type        = string
  default     = "nixos-zfs-ec2"
  description = "Name prefix for the published AMI."
}

variable "architecture" {
  type        = string
  description = "AMI architecture, such as arm64 or x86_64."
}

variable "root_snapshot_id" {
  type        = string
  description = "Snapshot ID for the bootable NixOS root volume."
}

variable "nix_snapshot_id" {
  type        = string
  description = "Snapshot ID for the preseeded ZFS /nix volume."
}

variable "input_hash" {
  type        = string
  description = "Stable hash of the AMI builder inputs."
}

variable "builder_git_rev" {
  type        = string
  description = "Git revision of this AMI builder."
}

variable "flake_lock_rev" {
  type        = string
  description = "Revision or hash representing flake.lock inputs."
}

variable "nixos_system_closure" {
  type        = string
  default     = ""
  description = "NixOS system closure path used to build the root image."
}

variable "root_device_name" {
  type        = string
  default     = "/dev/xvda"
  description = "Root block device name used for AMI registration."
}

variable "nix_device_name" {
  type        = string
  default     = "/dev/sdf"
  description = "AMI block device name for the /nix EBS snapshot. Runtime imports by ZFS pool identity, not this device name."
}

variable "root_volume_size_gb" {
  type        = number
  default     = 30
  description = "Root EBS volume size."
}

variable "nix_volume_size_gb" {
  type        = number
  default     = 50
  description = "/nix EBS volume size."
}