---
# Disable the GUI for a confirmed maintenance wave (kiosk/headless mode).
# Dry run: ansible-playbook -i inventory/hosts.yml playbooks/bf-gui-off.yml -e operation_wave=lab -e operation_confirmed=true --check
- name: Disable graphical target
  hosts: "{{ operation_wave | default('invalid-wave', true) }}"
  gather_facts: false
  become: true
  vars:
    approved_operation_waves: [lab, pilot_1, pilot_2, wave_1, wave_2, production]
    production_override: false
  pre_tasks:
    - name: Require confirmed approved operation wave scope
      ansible.builtin.assert:
        that:
          - operation_wave in approved_operation_waves
          - operation_confirmed | bool
          - operation_wave in groups
          - ansible_play_hosts_all | length > 0
          - ansible_play_hosts_all | difference(groups[operation_wave]) | length == 0
        fail_msg: "Set operation_wave to one inventory wave and operation_confirmed=true; full-fleet scope is refused."
      run_once: true

    - name: Require separate production override
      ansible.builtin.assert:
        that:
          - operation_wave != 'production' or production_override | bool
        fail_msg: "Production operation requires production_override=true in addition to operation_confirmed=true."
      run_once: true
  tasks:
    - name: Read current default target
      ansible.builtin.command: systemctl get-default
      register: current_default_target
      changed_when: false

    - name: Set default target to multi-user
      ansible.builtin.command: systemctl set-default multi-user.target
      when: current_default_target.stdout != 'multi-user.target'

    - name: Stop graphical target now
      ansible.builtin.systemd:
        name: graphical.target
        state: stopped