name: "Build NixOS Image"

on:
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    defaults:
      run:
        working-directory: nixos

    steps:
      - name: Checkout repo
        uses: actions/checkout@v4

      - name: Install Nix
        uses: cachix/install-nix-action@v31
        with:
          nix_path: nixpkgs=channel:nixos-unstable
          extra_nix_config: |
            experimental-features = nix-command flakes

      - name: Build NixOS image
        run: nix build .#nixosImage

      - name: Upload & Restore to Proxmox
        env:
          PROXMOX_SSH_KEY: ${{ secrets.PROXMOX_SSH_KEY }}
          PROXMOX_HOST: 192.168.1.205
          PROXMOX_USER: root
        run: |
          set -e

          IMAGE_NAME="vm-image.vma.zst"
          REMOTE_PATH="/var/lib/vz/template/$IMAGE_NAME"
          VM_ID="9000"

          echo "Starting ssh-agent and uploading..."
          eval "$(ssh-agent -s)"
          ssh-add <(echo "$PROXMOX_SSH_KEY")

          echo "Uploading image..."
          scp -o StrictHostKeyChecking=no ./result/$IMAGE_NAME $PROXMOX_USER@$PROXMOX_HOST:$REMOTE_PATH

          echo "Restoring VM $VM_ID..."
          ssh -o StrictHostKeyChecking=no $PROXMOX_USER@$PROXMOX_HOST "
            qm stop $VM_ID || true
            qm destroy $VM_ID || true
            qmrestore --unique $REMOTE_PATH $VM_ID
            qm template $VM_ID
          "