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

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

variable "system" {
  type        = string
  default     = "aarch64-linux"
  description = "Target NixOS system for the AMI."

  validation {
    condition     = contains(["aarch64-linux", "x86_64-linux"], var.system)
    error_message = "system must be aarch64-linux or x86_64-linux."
  }
}

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 "builder_instance_type" {
  type        = string
  default     = null
  description = "Temporary EC2 instance type used to build and seed the AMI. Defaults to c7g.2xlarge for aarch64-linux and c7i.2xlarge for x86_64-linux."
}

variable "vpc_id" {
  type        = string
  default     = null
  description = "VPC ID. Defaults to the account default VPC."
}

variable "subnet_id" {
  type        = string
  default     = null
  description = "Subnet ID. Defaults to the first subnet in the selected/default VPC."
}

variable "base_nixos_ami_id" {
  type        = string
  default     = null
  description = "Base NixOS AMI used only for the temporary builder. If null, OpenTofu searches for a recent NixOS AMI."
}

variable "base_nixos_ami_owners" {
  type        = list(string)
  default     = ["427812963091"]
  description = "AWS account IDs to search for base NixOS AMIs."
}

variable "base_nixos_ami_name_pattern" {
  type        = string
  default     = null
  description = "Base NixOS AMI name filter."
}

variable "root_volume_size_gb" {
  type        = number
  default     = 30
  description = "Temporary builder root EBS volume size. This becomes the final AMI root snapshot size."
}

variable "root_volume_iops" {
  type        = number
  default     = 6000
  description = "Temporary builder root gp3 IOPS. This affects builder speed only; snapshots do not preserve provisioned IOPS."
}

variable "root_volume_throughput" {
  type        = number
  default     = 250
  description = "Temporary builder root gp3 throughput in MiB/s. This affects builder speed only; snapshots do not preserve provisioned throughput."
}

variable "nix_volume_size_gb" {
  type        = number
  default     = 50
  description = "Temporary /nix EBS volume size. This becomes the final AMI /nix snapshot size."
}

variable "nix_volume_iops" {
  type        = number
  default     = 12000
  description = "Temporary /nix gp3 IOPS used while building and seeding the AMI."
}

variable "nix_volume_throughput" {
  type        = number
  default     = 500
  description = "Temporary /nix gp3 throughput in MiB/s used while building and seeding the AMI."
}

variable "nix_pool" {
  type        = string
  default     = "nixos-zfs-nix"
  description = "ZFS pool name for the AMI-provided /nix volume."
}

variable "nix_device_name" {
  type        = string
  default     = "/dev/sdf"
  description = "EC2 block device name for the AMI /nix volume. NixOS imports by ZFS pool identity, not this device name."
}

variable "ssh_public_key" {
  type        = string
  default     = null
  description = "Optional SSH public key for debugging the temporary builder."
}