name: "Build & Upload NixOS Proxmox Image"

on:
  push:
    tags:
      - "v*" # triggers on v1.0.0, v1.2.3, etc.
  workflow_dispatch:

jobs:
  build:
    name: Build NixOS Base Image
    # Ensure 'nixos-latest' runner has Docker, SSH client, and basic Nix tools installed.
    # It seems it already does.
    runs-on: nixos-latest
    env:
      NIXOS_BUILER_HOST: nixos-builder.lab
      NIXOS_BUILER_USER: runner
      PROXMOX_HOST: 192.168.1.205
      PROXMOX_USER: plasmagoat

      # VM Template IDs for your Ansible playbook
      # These are now passed to the playbook via --extra-vars, not directly as env vars for qm.
      # They are defined in group_vars/all.yml, but can be overridden from here if needed.
      # TEMPLATE_VMID: 9001 # Removed from direct env for explicit passing to Ansible
      # LATEST_TEMPLATE_VMID: 9000 # Removed from direct env for explicit passing to Ansible

    steps:
      # Use nix-env for setup (as you prefer and it works well for ephemeral environments)
      - name: Install dependencies via nix-env
        run: |
          nix-env -iA nixpkgs.nodejs
          nix-env -iA nixpkgs.ansible
          nix-env -iA nixpkgs.jq
          nix-env -iA nixpkgs.openssh
          nix-env -iA cachix -f https://cachix.org/api/v1/install
          cachix use plasmagoat
          cachix authtoken ${{ secrets.CACHIX_AUTH_TOKEN }}

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

      - name: Enable experimental features
        run: |
          mkdir -p ~/.config/nix
          echo "experimental-features = nix-command flakes" >> ~/.config/nix/nix.conf

      - name: Prepare SSH keys and known_hosts for builder and Proxmox
        run: |
          mkdir -p ~/.ssh
          # Ensure this key corresponds to PROXMOX_USER
          echo "${{ secrets.RUNNER_SSH_KEY }}" > ~/.ssh/id_rsa
          chmod 600 ~/.ssh/id_rsa
          # Add builder and Proxmox host keys to known_hosts
          ssh-keyscan -H "$NIXOS_BUILER_HOST" >> ~/.ssh/known_hosts
          ssh-keyscan -H "$PROXMOX_HOST" >> ~/.ssh/known_hosts
          chmod 600 ~/.ssh/known_hosts

      - name: Test SSH connection to NixOS Builder
        run: |
          echo "Testing SSH connection to $NIXOS_BUILER_HOST..."
          ssh -o StrictHostKeyChecking=yes "$NIXOS_BUILER_USER"@"$NIXOS_BUILER_HOST" "echo 'SSH success. Hostname:' && hostname"

      - name: Test SSH connection to Proxmox Host
        run: |
          echo "Testing SSH connection to $PROXMOX_HOST..."
          ssh -o StrictHostKeyChecking=yes "$PROXMOX_USER"@"$PROXMOX_HOST" "echo 'SSH success. Hostname:' && hostname"

      - name: Build NixOS image
        id: build_image
        run: |
          nix build .#base \
          --builders "ssh://$NIXOS_BUILER_USER@$NIXOS_BUILER_HOST x86_64-linux ~/.ssh/id_rsa 1 1 kvm" \
          --max-jobs 0 \
          --print-out-paths \
           | cachix push plasmagoat

          # Capture the actual image path from the result symlink for Ansible
          IMAGE_PATH=$(find result/ -name "*.vma.zst" | head -n 1)
          if [ -z "$IMAGE_PATH" ]; then
            echo "Error: No .vma.zst image found after build."
            exit 1
          fi
          echo "image_path_from_build=${IMAGE_PATH}" >> "$GITHUB_OUTPUT"

      - name: Run Proxmox Image Deployment
        run: |
          chmod +x ./scripts/run_ansible_ci.sh
          # Execute the script, passing necessary environment variables
          bash scripts/run_ansible_ci.sh
        env:
          # These are passed directly to the `run_ansible_ci.sh` script,
          # which then uses them to construct Ansible's --extra-vars.
          # Match these variable names with what `run_ansible_ci.sh` expects.
          # Note: The `image_path_from_build` comes from the previous step's output.
          PROXMOX_LOCAL_IMAGE_PATH_FROM_BUILD: ${{ steps.build_image.outputs.image_path_from_build }}

          # Provide VMIDs and names, overriding group_vars if desired.
          # These will be passed as `--extra-vars` to Ansible.
          ANSIBLE_EXTRA_VARS: >-
            backup_template_vmid={{ env.TEMPLATE_VMID | default('9001') }}
            latest_template_vmid={{ env.LATEST_TEMPLATE_VMID | default('9000') }}
            proxmox_host={{ env.PROXMOX_HOST }}
            proxmox_user={{ env.PROXMOX_USER }}
            remote_image_path_ci={{ steps.build_image.outputs.image_path_from_build }}

  release:
    name: Release Image
    needs: build
    runs-on: ubuntu-latest
    if: success()

    steps:
      - name: Set VERSION from tag or fallback
        id: version
        run: |
          if [ -n "${CI_COMMIT_TAG}" ]; then # Use CI_COMMIT_TAG for Forgejo
            echo "tag=${CI_COMMIT_TAG}" >> "$GITHUB_OUTPUT"
          else
            echo "tag=dev-$(date +%s)" >> "$GITHUB_OUTPUT"
          fi

      - name: Create Forgejo Release
        uses: https://code.forgejo.org/sheik/forgejo-release@v2.6.0
        with:
          title: "NixOS Base Image ${{ steps.version.outputs.tag }}"
          prerelease: ${{ github.ref_type != 'tag' }}
          tag: ${{ steps.version.outputs.tag }}
          direction: upload
          release-notes: |
            This release contains the NixOS base image for Proxmox labeled `${{ steps.version.outputs.tag }}`.
          release-dir: "${{ steps.artifact.outputs.download-path }}/nix-support"