---
- name: Build backup chain for incremental restore
  when: restore_is_incremental
  block:
    - name: Initialize backup chain with current backup
      ansible.builtin.set_fact:
        restore_backup_chain: ["{{ backup_dir }}"]
        restore_chain_current: "{{ backup_dir }}"

    - name: Walk backwards through chain to find full backup
      ansible.builtin.include_tasks:
        file: restore_chain_walk.yaml
      vars:
        restore_chain_backup_dir: "{{ restore_chain_current }}"

    - name: Reverse chain to restore full backup first
      ansible.builtin.set_fact:
        restore_backup_chain_ordered: "{{ restore_backup_chain | reverse | list }}"

    - name: Display detected backup chain
      ansible.builtin.debug:
        msg: |
          Backup chain detected ({{ restore_backup_chain_ordered | length }} backups):
          {% for idx in range(restore_backup_chain_ordered | length) %}
          {{ idx + 1 }}. {{ restore_backup_chain_ordered[idx] }}
          {% endfor %}

    - name: Restore each backup in chronological order
      ansible.builtin.include_tasks:
        file: restore_single.yaml
      vars:
        restore_single_backup_dir: "{{ item }}"
        restore_single_is_first: "{{ item == restore_backup_chain_ordered[0] }}"
        restore_single_index: "{{ idx + 1 }}"
        restore_single_total: "{{ restore_backup_chain_ordered | length }}"
      loop: "{{ restore_backup_chain_ordered }}"
      loop_control:
        index_var: idx
        label: "{{ item }}"