---
- name: 在已启动数据库上验证首备后启用调度
  hosts: pg_repository
  become: true
  become_user: pgbackup
  gather_facts: false
  vars:
    pg_backup_command: [pgbackrest, '--config=/etc/homelab-pgbackrest/repository.conf', '--stanza=prod']
  tasks:
    - name: 检查 stanza 元数据
      ansible.builtin.stat:
        path: "{{ pg_repo_path }}/backup/prod/backup.info"
      register: pg_stanza
    - name: 首次初始化 stanza
      ansible.builtin.command:
        argv: "{{ pg_backup_command + ['stanza-create'] }}"
      when: not pg_stanza.stat.exists
      changed_when: true
    - name: 验证真实 WAL 归档（会触发 WAL 切换）
      ansible.builtin.command:
        argv: "{{ pg_backup_command + ['check'] }}"
      changed_when: false
    - name: 查询已有备份
      ansible.builtin.command:
        argv: "{{ pg_backup_command + ['--output=json', 'info'] }}"
      register: pg_backup_info
      changed_when: false
    - name: 没有成功备份时创建首个 full
      ansible.builtin.command:
        argv: "{{ pg_backup_command + ['--type=full', 'backup'] }}"
      when: (pg_backup_info.stdout | from_json)[0].backup | length == 0
      changed_when: true
    - name: 验证成功后才启用 timer
      ansible.builtin.systemd_service:
        name: homelab-postgresql-backup.timer
        daemon_reload: true
        enabled: true
        state: started
      become_user: root
      become: true