---
# =============================================================================
# hypervisor_backup_config — main tasks
# =============================================================================
# Strategy:
#   - Create a tarball on the remote node (handles symlinks, permissions cleanly)
#   - Fetch the tarball to Semaphore host
#   - For git: extract into repo path, add/commit/push, clean up
#   - For local: leave tarball on the node, rotate old ones
#   - For sftp: transfer tarball to remote, clean up temp

- name: Gather date/time facts
  ansible.builtin.setup:
    gather_subset:
      - date_time
  when: ansible_date_time is not defined

# ── Set backup paths based on hypervisor type ─────────────────────────────────
- name: Set backup paths for proxmox
  ansible.builtin.set_fact:
    pve_config_backup_paths: "{{ pve_config_backup_paths_proxmox }}"
  when: hypervisor_type == 'proxmox'

- name: Set backup paths for xcpng
  ansible.builtin.set_fact:
    pve_config_backup_paths: "{{ pve_config_backup_paths_xcpng }}"
  when: hypervisor_type == 'xcpng'

- name: Fail if hypervisor_type not supported
  ansible.builtin.fail:
    msg: "hypervisor_type '{{ hypervisor_type }}' is not supported. Use proxmox or xcpng."
  when: hypervisor_type not in ['proxmox', 'xcpng']

# ── Create tarball on remote node ─────────────────────────────────────────────
# Done once — reused by all destinations
- name: Create config tarball on node
  ansible.builtin.shell: |
    tar czf /tmp/{{ pve_config_backup_filename }}.tar.gz \
      --ignore-failed-read \
      --dereference \
      {{ pve_config_backup_paths | join(' ') }} 2>/dev/null || true
    echo "done"
  register: node_tarball
  changed_when: true

# ── Git backup ────────────────────────────────────────────────────────────────
- name: Git backup
  when: "'git' in (pve_config_backup_destinations | map(attribute='type') | list)"
  block:
    - name: Git | Ensure extract path exists on Semaphore host
      ansible.builtin.file:
        path: "{{ pve_config_git_repo_dir }}/{{ pve_config_git_base_path }}"
        state: directory
        mode: '0755'
      delegate_to: localhost

    - name: Git | Fetch tarball from node to Semaphore host
      ansible.builtin.fetch:
        src: "/tmp/{{ pve_config_backup_filename }}.tar.gz"
        dest: "/tmp/{{ pve_config_backup_filename }}.tar.gz"
        flat: true

    - name: Git | Extract tarball into repo path
      ansible.builtin.shell: |
        tar xzf /tmp/{{ pve_config_backup_filename }}.tar.gz \
          -C {{ pve_config_git_repo_dir }}/{{ pve_config_git_base_path }} \
          --strip-components=0 2>/dev/null || true
        echo "extracted"
      delegate_to: localhost
      changed_when: true

    - name: Git | Clean up local temp tarball
      ansible.builtin.file:
        path: "/tmp/{{ pve_config_backup_filename }}.tar.gz"
        state: absent
      delegate_to: localhost

    - name: Git | Check if there are changes to commit
      ansible.builtin.shell: |
        cd {{ pve_config_git_repo_dir }}
        git status --porcelain {{ pve_config_git_base_path }}/
      register: git_status
      delegate_to: localhost
      changed_when: false

    - name: Git | Pull latest before committing
      ansible.builtin.shell: |
        cd {{ pve_config_git_repo_dir }}
        git pull origin {{ pve_config_git_branch }} --rebase
      delegate_to: localhost
      when: git_status.stdout != ""
      changed_when: false

    - name: Git | Stage backup files
      ansible.builtin.shell: |
        cd {{ pve_config_git_repo_dir }}
        git add {{ pve_config_git_base_path }}/
      delegate_to: localhost
      when: git_status.stdout != ""

    - name: Git | Commit backup
      ansible.builtin.shell: |
        cd {{ pve_config_git_repo_dir }}
        git -c user.name="ansible-msp" -c user.email="ansible@msp.local" \
          commit -m "{{ pve_config_git_commit_message }}"
      delegate_to: localhost
      when: git_status.stdout != ""
      register: git_commit

    - name: Git | Push to remote
      ansible.builtin.shell: |
        cd {{ pve_config_git_repo_dir }}
        git push origin {{ pve_config_git_branch }}
      delegate_to: localhost
      when: git_status.stdout != ""

    - name: Git | Log result
      ansible.builtin.debug:
        msg: "{{ 'Config backed up to git: ' + pve_config_git_base_path if git_status.stdout != '' else 'No config changes since last backup — git commit skipped' }}"

# ── Local backup ──────────────────────────────────────────────────────────────
- name: Local backup
  when: "'local' in (pve_config_backup_destinations | map(attribute='type') | list)"
  block:
    - name: Local | Ensure backup dir exists on node
      ansible.builtin.file:
        path: "{{ pve_config_local_backup_dir }}"
        state: directory
        mode: '0700'

    - name: Local | Move tarball to backup dir
      ansible.builtin.shell: |
        cp /tmp/{{ pve_config_backup_filename }}.tar.gz \
           {{ pve_config_local_backup_dir }}/{{ pve_config_backup_filename }}.tar.gz
      changed_when: true

    - name: Local | Remove old backups beyond keep limit
      ansible.builtin.shell: |
        ls -1t {{ pve_config_local_backup_dir }}/{{ hypervisor_type }}_{{ client_id | lower | replace('-','_') | replace(' ','_') }}_{{ inventory_hostname }}_config_*.tar.gz 2>/dev/null \
          | tail -n +{{ (pve_config_backup_keep | int) + 1 }} \
          | xargs -r rm -f
      changed_when: false

    - name: Local | Log result
      ansible.builtin.debug:
        msg: "Config backed up locally: {{ pve_config_local_backup_dir }}/{{ pve_config_backup_filename }}.tar.gz"

# ── SFTP backup ───────────────────────────────────────────────────────────────
- name: SFTP backup
  when: "'sftp' in (pve_config_backup_destinations | map(attribute='type') | list)"
  block:
    - name: SFTP | Validate required vars are set
      ansible.builtin.fail:
        msg: "sftp destination requires pve_config_sftp_host and pve_config_sftp_user to be set"
      when: pve_config_sftp_host == "" or pve_config_sftp_user == ""

    - name: SFTP | Fetch tarball to Semaphore host first
      ansible.builtin.fetch:
        src: "/tmp/{{ pve_config_backup_filename }}.tar.gz"
        dest: "/tmp/{{ pve_config_backup_filename }}.tar.gz"
        flat: true

    - name: SFTP | Transfer tarball to remote host
      ansible.builtin.shell: |
        sftp_opts="-o StrictHostKeyChecking=no -o BatchMode=yes"
        {% if pve_config_sftp_key != "" %}
        sftp_opts="$sftp_opts -i {{ pve_config_sftp_key }}"
        {% endif %}
        sftp $sftp_opts {{ pve_config_sftp_user }}@{{ pve_config_sftp_host }} << EOF
        cd {{ pve_config_sftp_remote_dir }}
        put /tmp/{{ pve_config_backup_filename }}.tar.gz
        EOF
      delegate_to: localhost
      changed_when: true

    - name: SFTP | Clean up local temp tarball
      ansible.builtin.file:
        path: "/tmp/{{ pve_config_backup_filename }}.tar.gz"
        state: absent
      delegate_to: localhost

    - name: SFTP | Log result
      ansible.builtin.debug:
        msg: "Config backed up via sftp: {{ pve_config_sftp_host }}:{{ pve_config_sftp_remote_dir }}/{{ pve_config_backup_filename }}.tar.gz"

# ── Clean up temp tarball on node ─────────────────────────────────────────────
- name: Clean up temp tarball on node
  ansible.builtin.file:
    path: "/tmp/{{ pve_config_backup_filename }}.tar.gz"
    state: absent