terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 5.0"
    }
  }
  backend "s3" {}
}
provider "aws" {
  region = "us-west-2"
}

variable "eks_oidc" {
  type = string
}

variable "env" {
  type = string
}

variable "logical_region_name" {
  type = string
}

variable "controlplane_account" {
  type = string
}

variable "auto_deploy_owner_tag" {
  type = string
}

module "cluster-autoscaler" {
  source = "../../modules/controlplane"

  controlplane_account = var.controlplane_account
  oidc                 = var.eks_oidc
  role_name            = "${var.env}-${var.logical_region_name}-cluster-autoscaler"
  service_account      = "cluster-autoscaler"
  // Ref installation document https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/cloudprovider/aws/README.md
  // policy is copied from https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/cloudprovider/aws/README.md#full-cluster-autoscaler-features-policy-recommended
  policy_document = jsonencode({
    "Version": "2012-10-17",
    "Statement": [
      {
        "Effect": "Allow",
        "Action": [
          "autoscaling:DescribeAutoScalingGroups",
          "autoscaling:DescribeAutoScalingInstances",
          "autoscaling:DescribeLaunchConfigurations",
          "autoscaling:DescribeScalingActivities",
          "autoscaling:DescribeTags",
          "ec2:DescribeImages",
          "ec2:DescribeInstanceTypes",
          "ec2:DescribeLaunchTemplateVersions",
          "ec2:GetInstanceTypesFromInstanceRequirements",
          "eks:DescribeNodegroup"
        ],
        "Resource": ["*"]
      },
      {
        "Effect": "Allow",
        "Action": [
          "autoscaling:SetDesiredCapacity",
          "autoscaling:TerminateInstanceInAutoScalingGroup"
        ],
        "Resource": ["*"]
      }
    ]
  })
  auto_deploy_owner_tag = var.auto_deploy_owner_tag
}

output "role_arn" {
  value = module.cluster-autoscaler.controlplane_role_arn
}