---
- name: Check current diversion status for {{ reverse_proxy_default_caddy_path }}
  ansible.builtin.command:
    cmd: dpkg-divert --list {{ reverse_proxy_default_caddy_path }}
  register: divert_check_result
  changed_when: false # This task only checks state
  failed_when: false # Don't fail if diversion doesn't exist (rc=1)
  become: true

- name: Divert package manager's caddy binary path
  ansible.builtin.command:
    cmd: dpkg-divert --divert {{ reverse_proxy_diverted_caddy_path }} --rename {{ reverse_proxy_default_caddy_path }}
  # Only run if the diversion isn't already set correctly
  when: "reverse_proxy_diverted_caddy_path not in divert_check_result.stdout"
  notify: Restart caddy service # Notify restart if diversion happens
  become: true

- name: Copy custom Caddy binary to destination path
  ansible.builtin.copy:
    src: "{{ reverse_proxy_custom_caddy_source_path }}"
    dest: "{{ reverse_proxy_custom_caddy_dest_path }}"
    owner: root
    group: root
    mode: "0755"
    remote_src: true
  notify: Restart caddy service # Notify restart if binary changes
  become: true

- name: Install original (diverted) caddy binary alternative
  ansible.builtin.command:
    # Use --force if the link /usr/bin/caddy might exist but not be managed by alternatives yet
    cmd: update-alternatives --install {{ reverse_proxy_alternatives_link }} {{ reverse_proxy_alternatives_name }} {{ reverse_proxy_diverted_caddy_path }} 10
  changed_when: false # update-alternatives is idempotent but often reports no change via rc
  become: true

- name: Install custom caddy binary alternative with higher priority
  ansible.builtin.command:
    cmd: update-alternatives --install {{ reverse_proxy_alternatives_link }} {{ reverse_proxy_alternatives_name }} {{ reverse_proxy_custom_caddy_dest_path }} 50
  changed_when: false # update-alternatives is idempotent but often reports no change via rc
  notify: Restart caddy service
  become: true