resource "google_compute_router" "nat-router" {
  name    = var.nat_router_name
  network = var.vpc_name
  region  = var.region
}

resource "google_compute_address" "address" {
  count  = 1
  name   = "nat-manual-ip"
  region = google_compute_router.nat-router.region

  lifecycle {
    create_before_destroy = true
  }
}

resource "google_compute_router_nat" "nat-config" {
  name                               = var.nat_name
  router                             = google_compute_router.nat-router.name
  region                             = google_compute_router.nat-router.region
  nat_ip_allocate_option             = "MANUAL_ONLY"
  nat_ips                            = [for addr in google_compute_address.address : addr.self_link]
  source_subnetwork_ip_ranges_to_nat = "LIST_OF_SUBNETWORKS"

  subnetwork {
    name                    = "${var.vpc_name}-subnet"
    source_ip_ranges_to_nat = ["ALL_IP_RANGES"]
  }

  log_config {
    enable = true
    filter = "ALL"
  }
}