---
# Append this Site's block to the shared Caddyfile.
#
# Caddy is its own playbook (ansible-playbooks/caddy/playbook.yml) and a rootless
# Quadlet unit there, so this role does not manage the container — it only points
# it at the app. The Caddyfile is a bind mount into that container, so Caddy sees
# a written change as soon as the file lands; the handler only asks Caddy to
# re-read it. That is a reload, not a restart, so the other hosted sites are
# untouched.
#
# blockinfile is idempotent on its own via the marker, so there is no need to
# slurp the file and compare first — which also matters because slurp *fails*
# when the Caddyfile does not exist yet, on a host where the Caddy playbook has
# not run.

- name: Check the Caddyfile exists
  ansible.builtin.stat:
    path: '{{ caddyfile_path }}'
  register: menu_caddyfile

- name: Fail when Caddy is not where we expect it
  ansible.builtin.fail:
    msg: >-
      {{ caddyfile_path }} is missing. Deploy the Caddy playbook
      (ansible-playbooks/caddy/playbook.yml), which owns the Caddy unit and its
      config, before this one.
  when: not menu_caddyfile.stat.exists

# The Site's web address may still be claimed by an older snippet: the retired
# nginx-menu playbook wrote one per hostname. Two blocks for one address make
# Caddy refuse the whole config, and a refused reload leaves the old proxy in
# place, which is a 502 once the old container is gone.
- name: Drop any older snippet claiming this web address
  ansible.builtin.blockinfile:
    path: '{{ caddyfile_path }}'
    marker: '# {mark} Ansible managed Caddy snippet for {{ host }}'
    state: absent
  notify: Reload Caddy

# blockinfile replaces whatever sits between its markers, so redeploying updates
# the snippet in place rather than appending a second one.
- name: Point the Site's web address at the app
  ansible.builtin.blockinfile:
    path: '{{ caddyfile_path }}'
    marker: '# {mark} ANSIBLE MANAGED: menu app ({{ site }})'
    block: '{{ caddy_snippet }}'
    create: false
    owner: '{{ podman_user }}'
    group: '{{ podman_user }}'
    mode: '0644'
  notify: Reload Caddy