---
- set_fact:
    pcs_host: ""

# The below filter chain does the following:
# - Get the list of roles NOT present in the nova_compute groups
# - Get the list of hosts in each role into an array
# - Sort the resulting list of hosts for each role
# - Return a list of host lists. eg: [['ctrl-1', 'ctrl2', 'ctrl-3'], ['DB1']]
# - OR if the role does not exist, it returns []
- set_fact:
    oc_role_host_list_controlplane: >-
      {{ (oc_roles_hosts|dict2items |
          rejectattr('key', 'in', inventory_rolemap['nova_compute'] | default([]))) |
          map(attribute='value') | map('sort') | list }}

# - Then with_together does a zip_longest to combine the list of lists,
#   using None to fill the gaps. eg: [ctrl-1, DB1, ctrl2, None, ctrl-3, None]
# - We take care of the possible [] value by replacing it with two empty lists.
- name: upgrade controlplane {{ item }}
  vars:
    host: "{{ item | reject('none') | join(',') }}"
    pcs_present: true
    compute_present: false
  include_tasks: overcloud_upgrade_hosts.yaml
  with_together: "{{ (oc_role_host_list_controlplane | length == 0) | ternary([[], []], oc_role_host_list_controlplane) }}"

# The below filter chain does the following:
# - Get the list of roles present in the nova_compute group
# - Get the list of hosts in each role into an array
# - Sort the resulting list of hosts for each role
# - Return a list of host lists
# - OR if the role does not exist, it returns []
- set_fact:
    oc_role_host_list_nova_compute: >-
      {{ (oc_roles_hosts|dict2items |
          selectattr('key', 'in', inventory_rolemap['nova_compute'] | default([]))) |
           map(attribute='value') | map('sort') | list }}

# - Then with_together does a zip_longest to combine the list of lists,
#   using None to fill the gaps.
# - We take care of the possible [] value by replacing it with two empty lists.
- name: upgrade computes {{ item }}
  vars:
    host: "{{ item | reject('none') | join(',') }}"
    pcs_present: false
    compute_present: true
  include_tasks: overcloud_upgrade_hosts.yaml
  with_together: "{{ (oc_role_host_list_nova_compute | length == 0) | ternary([[], []], oc_role_host_list_nova_compute) }}"