locals {
  dot_env_file_path = ".env"
  dot_env_regex     = "(?m:^\\s*([^#\\s]\\S*)\\s*=\\s*[\"']?(.*[^\"'\\s])[\"']?\\s*$)"
  dot_env           = { for tuple in regexall(local.dot_env_regex, file(local.dot_env_file_path)) : tuple[0] => sensitive(tuple[1]) }

  uri = local.dot_env["LIBVIRT_DEFAULT_URI"]

  cidrs = [
    var.network_ipv4_cidr,
    var.network_ipv6_cidr,
  ]
  image_source = "${var.image_pool_folder}/${var.image_filename}"
  user_templates = merge(
    { control_plane = "control-plane.yaml.tpl" },
    { for ip in var.worker_ipv4s : "worker_${replace(ip, "\\.", "-")}" => "worker.yaml.tpl" }
  )

  ipv4_prefix  = tonumber(split("/", var.network_ipv4_cidr)[1])
  ipv4_gateway = cidrhost(var.network_ipv4_cidr, 1)
  ipv6_prefix  = tonumber(split("/", var.network_ipv6_cidr)[1])
  ipv6_gateway = cidrhost(var.network_ipv6_cidr, 1)

  node_addrs = merge(
    { control_plane = { ipv4 = var.control_plane_ipv4, ipv6 = var.control_plane_ipv6 } },
    { for idx, ip in var.worker_ipv4s :
      "worker_${replace(ip, "\\.", "-")}" => { ipv4 = ip, ipv6 = var.worker_ipv6s[idx] }
    }
  )

  nodes = { for key, addr in local.node_addrs :
    key => {
      ipv4           = addr.ipv4
      ipv6           = addr.ipv6
      image          = contains(keys(libvirt_volume.worker_images), key) ? libvirt_volume.worker_images[key].id : libvirt_volume.control_plane_image.id
      user_data      = data.template_file.user_data[key].rendered
      network_config = data.template_file.network_config[key].rendered
    }
  }
}