---
# Restart the WireGuard tunnel interface.
# Run: ansible-playbook -i inventory/hosts.yml playbooks/bf-wireguard-restart.yml -e operation_wave=lab -e operation_confirmed=true --limit lab
# Uses wg_interface from group_vars and defaults to wg0.
# No Semaphore Pro feature is used.
- name: Restart WireGuard tunnel
  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
    wireguard_restart_interface: "{{ wg_interface | default('wg0') }}"
  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: Restart WireGuard service
      ansible.builtin.systemd:
        name: "wg-quick@{{ wireguard_restart_interface }}"
        state: restarted

    - name: Verify tunnel state
      ansible.builtin.command:
        argv: [wg, show, "{{ wireguard_restart_interface }}"]
      register: wg_out
      changed_when: false

    - name: Show WireGuard state
      ansible.builtin.debug:
        msg: "{{ inventory_hostname }}: {{ wg_out.stdout_lines | default([]) }}"