---
# =============================================================================
# proxmox_preflight — tasks
# Determines: standalone vs cluster, node health, quorum, CEPH state
# Sets facts: proxmox_is_cluster, proxmox_cluster_nodes, proxmox_node_count
# =============================================================================

# ── Detect standalone vs cluster ──────────────────────────────────────────────
- name: "Preflight | Detect cluster membership"
  ansible.builtin.command: pvecm status
  register: pvecm_status
  changed_when: false
  failed_when: false

- name: "Preflight | Set cluster mode fact"
  ansible.builtin.set_fact:
    proxmox_is_cluster: "{{ pvecm_status.rc == 0 }}"
  delegate_to: localhost

- name: "Preflight | Log topology"
  ansible.builtin.debug:
    msg: >-
      Node {{ inventory_hostname }} is running in
      {{ 'CLUSTER' if proxmox_is_cluster else 'STANDALONE' }} mode.

# ── Standalone path ───────────────────────────────────────────────────────────
- name: "Preflight | Standalone | Verify host is reachable"
  ansible.builtin.ping:
  when: not proxmox_is_cluster

- name: "Preflight | Standalone | Health check passed"
  ansible.builtin.debug:
    msg: "Standalone node {{ inventory_hostname }} is reachable — preflight passed."
  when: not proxmox_is_cluster

# ── Cluster path ──────────────────────────────────────────────────────────────
- name: "Preflight | Cluster | Check quorum"
  ansible.builtin.command: pvecm status
  register: quorum_check
  changed_when: false
  failed_when: "'Quorate' not in quorum_check.stdout"
  when: proxmox_is_cluster and preflight_check_quorum
  run_once: true

- name: "Preflight | Cluster | Get all node info via API"
  community.proxmox.proxmox_node_info:
    api_host: "{{ api_host }}"
    api_user: "{{ api_user }}"
    api_token_id: "{{ api_token_id }}"
    api_token_secret: "{{ api_token_secret }}"
    api_port: "{{ api_port }}"
    validate_certs: "{{ validate_certs }}"
  register: proxmox_all_nodes
  delegate_to: localhost
  run_once: true
  when: proxmox_is_cluster

- name: "Preflight | Cluster | Set node list facts"
  ansible.builtin.set_fact:
    proxmox_cluster_nodes: "{{ proxmox_all_nodes.proxmox_nodes }}"
    proxmox_node_count: "{{ proxmox_all_nodes.proxmox_nodes | length }}"
    proxmox_online_nodes: >-
      {{ proxmox_all_nodes.proxmox_nodes
         | selectattr('status', 'equalto', 'online')
         | list }}
    proxmox_offline_nodes: >-
      {{ proxmox_all_nodes.proxmox_nodes
         | rejectattr('status', 'equalto', 'online')
         | list }}
  delegate_to: localhost
  run_once: true
  when: proxmox_is_cluster

- name: "Preflight | Cluster | Warn about offline nodes"
  ansible.builtin.debug:
    msg: >-
      WARNING: The following nodes are offline:
      {{ proxmox_offline_nodes | map(attribute='node') | list }}
  when:
    - proxmox_is_cluster
    - proxmox_offline_nodes | length > 0
  run_once: true

- name: "Preflight | Cluster | Abort if offline nodes detected"
  ansible.builtin.fail:
    msg: >-
      Preflight failed — {{ proxmox_offline_nodes | length }} node(s) are offline:
      {{ proxmox_offline_nodes | map(attribute='node') | list }}.
      Set preflight_abort_on_offline_node=false to proceed anyway.
  when:
    - proxmox_is_cluster
    - preflight_abort_on_offline_node
    - proxmox_offline_nodes | length > 0
  run_once: true

- name: "Preflight | Cluster | Verify minimum online node count"
  ansible.builtin.fail:
    msg: >-
      Only {{ proxmox_online_nodes | length }} node(s) online.
      Minimum required: {{ preflight_min_nodes_online }}.
  when:
    - proxmox_is_cluster
    - proxmox_online_nodes | length < preflight_min_nodes_online | int
  run_once: true

- name: "Preflight | Cluster | Health check passed"
  ansible.builtin.debug:
    msg: >-
      Cluster preflight OK —
      {{ proxmox_online_nodes | length }}/{{ proxmox_node_count }} nodes online,
      quorum confirmed.
  when: proxmox_is_cluster
  run_once: true