---
- name: Bootstrap Atlas ZFS pool
  tags: [atlas, storage, pool]
  when: atlas_create_pool | bool
  block:
    - name: Validate Atlas pool bootstrap inputs
      ansible.builtin.assert:
        that:
          - atlas_zpool_disks | length == 4
          - atlas_zpool_disks | unique | length == 4
          - atlas_zpool_disks | select('match', '^/dev/disk/by-id/') | list | length == 4
        fail_msg: >-
          Set exactly four distinct persistent /dev/disk/by-id paths in
          atlas_zpool_disks before creating the RAIDZ2 pool.

    - name: Inspect declared Atlas pool disks
      ansible.builtin.stat:
        path: "{{ item }}"
      loop: "{{ atlas_zpool_disks }}"
      loop_control:
        label: "{{ item }}"
      register: atlas_zpool_disk_stats

    - name: Require every declared Atlas pool disk
      ansible.builtin.assert:
        that:
          - item.stat.exists
          - item.stat.isblk | default(false)
        fail_msg: "Declared Atlas pool disk is unavailable or is not a block device: {{ item.item }}"
      loop: "{{ atlas_zpool_disk_stats.results }}"
      loop_control:
        label: "{{ item.item }}"

    - name: Check whether the Atlas ZFS pool already exists
      ansible.builtin.command:
        argv:
          - zpool
          - list
          - -H
          - -o
          - name
          - "{{ atlas_zfs_pool }}"
      register: atlas_zpool_bootstrap_check
      changed_when: false
      failed_when: atlas_zpool_bootstrap_check.rc not in [0, 1]

    - name: Create the Atlas RAIDZ2 pool when absent
      community.general.zpool:
        name: "{{ atlas_zfs_pool }}"
        state: present
        mountpoint: "{{ atlas_mount_root }}"
        force: false
        vdevs:
          - type: raidz2
            disks: "{{ atlas_zpool_disks }}"
      when: atlas_zpool_bootstrap_check.rc == 1