terraform {
  # This state is dedicated purely to the physical host configuration.
  # No providers are required since we use null_resource and ssh.
}

resource "null_resource" "bare_metal_setup" {
  triggers = {
    node         = var.node_ip
    data_disk_id = var.data_disk_id
    pool_name    = var.zfs_pool_name
  }

  connection {
    type        = "ssh"
    user        = var.ssh_user
    host        = var.node_ip
    private_key = var.ssh_private_key != "" ? var.ssh_private_key : null
    agent       = var.ssh_private_key == "" ? true : false
  }

  provisioner "remote-exec" {
    inline = [
      "set -euo pipefail",


      "echo '==> Setting laptop lid switch to ignore (prevents sleeping when closed)...'",
      "sed -i 's/^#\\?HandleLidSwitch=.*/HandleLidSwitch=ignore/' /etc/systemd/logind.conf",
      "systemctl restart systemd-logind",
      
      "echo '==> Applying NIC offloading fixes...'",
      "cat <<'EOF' > /etc/systemd/system/nic-offload-fix.service",
      "[Unit]",
      "Description=Disable NIC offloading (TSO/GRO/GSO) for physical interfaces",
      "After=network-online.target",
      "",
      "[Service]",
      "Type=oneshot",
      "ExecStart=/bin/bash -c 'for dev in /sys/class/net/*; do if [ \"$(basename \"$dev\")\" != \"lo\" ] && [[ ! \"$(basename \"$dev\")\" =~ ^(vmbr|veth|fwbr|tap|bonding) ]]; then /usr/sbin/ethtool -K \"$(basename \"$dev\")\" tso off gso off gro off || true; fi; done'",
      "RemainAfterExit=yes",
      "",
      "[Install]",
      "WantedBy=multi-user.target",
      "EOF",
      "systemctl daemon-reload",
      "systemctl enable --now nic-offload-fix.service || true",

      "echo '==> Setting up ZFS pool and Proxmox storage...'",
      "zpool list ${var.zfs_pool_name} || zpool create -f ${var.zfs_pool_name} /dev/disk/by-id/${var.data_disk_id}",
      "pvesm status -storage ${var.zfs_pool_name} || pvesm add zfspool ${var.zfs_pool_name} --pool ${var.zfs_pool_name} --content images,rootdir",

      "echo '==> Host layer configuration complete!'"
    ]
  }
}