---
# Navidrome + beets on music-box, published at music.contrapeso.xyz.
#
# See roles/navidrome/README.md for the exposure and backup decisions. The two
# that matter here: no basic_auth in front (the Subsonic API the mobile clients
# speak has nowhere to carry a second credential), and the fail2ban jail below
# covers the web UI only.
- name: Deploy Navidrome on music-box
  hosts: music
  become: yes
  vars:
    # Vault key is navidrome_encryption_key, not the role's own variable name -
    # assigning a var to itself is a recursive reference, not an override.
    navidrome_password_encryption_key: "{{ navidrome_encryption_key }}"
    healthcheck_push_url: "https://{{ subdomains.gatus }}.{{ root_domain }}/api/v1/endpoints/probe_navidrome/external"
    healthcheck_push_token: "{{ gatus_push_tokens[inventory_hostname] }}"
  roles:
    - navidrome

- name: Publish Navidrome from the edge host
  hosts: edge
  become: yes
  vars:
    navidrome_access_log: /var/log/caddy/music.log
  tasks:
    # The Debian package usually creates this, but `caddy validate` passes with
    # the directory missing and the RELOAD is what fails - so the vhost would
    # look deployed and serve nothing. Make it explicit.
    - name: Ensure the Caddy log directory exists
      ansible.builtin.file:
        path: "{{ navidrome_access_log | dirname }}"
        state: directory
        owner: caddy
        group: caddy
        mode: '0750'

    # The FILE, not just the directory, and this is load-bearing.
    #
    # `caddy validate` below runs as root and provisions the logging module,
    # which CREATES this file root:root 0600. Caddy itself runs as the caddy
    # user, so the subsequent reload then dies with:
    #   loading new config: setting up custom log 'log0': ...
    #   open /var/log/caddy/music.log: permission denied
    # and - the nasty part - `systemctl reload` hangs rather than failing,
    # leaving the unit stuck in "reloading" while the OLD config keeps serving.
    # So the vhost looks deployed, validate passes, nothing reports an error,
    # and the site is simply absent.
    #
    # Creating it up front with the right owner makes validate's open a no-op.
    - name: Ensure the Caddy access log file exists and is owned by caddy
      ansible.builtin.file:
        path: "{{ navidrome_access_log }}"
        state: touch
        owner: caddy
        group: caddy
        mode: '0640'
        access_time: preserve
        modification_time: preserve

    # caddy_site_body rather than caddy_site_upstream + caddy_site_resolvers:
    # this vhost needs a `log` directive so fail2ban has something to read, and
    # the role's template has no knob for one. The escape hatch is the
    # documented way to do this - gatus and headscale already use it - and it
    # leaves the other vhosts untouched.
    - name: Expose Navidrome over HTTPS
      ansible.builtin.include_role:
        name: caddy_site
      vars:
        caddy_site_name: music
        caddy_site_domain: "{{ subdomains.music }}.{{ root_domain }}"
        caddy_site_body: |
          log {
              output file {{ navidrome_access_log }} {
                  roll_size 10MiB
                  roll_keep 5
              }
              format json
          }
          reverse_proxy {{ hostvars['music_box_local'].ansible_host }}:{{ hostvars['music_box_local'].navidrome_port }} {
              # Tailscale MagicDNS: music-box has no public address.
              transport http {
                  resolvers 100.100.100.100
              }
          }

    # The per-site validate cannot catch a conflict between sites.
    - name: Validate the whole Caddyfile
      ansible.builtin.command: caddy validate --config /etc/caddy/Caddyfile --adapter caddyfile
      changed_when: false

    # ── fail2ban ────────────────────────────────────────────────────────────
    # The estate's first jail: 02_firewall_and_fail2ban_playbook.yml installs
    # fail2ban everywhere but leaves it on stock config. Kept inline here
    # because one jail does not justify a role; if a second service ever wants
    # one, that is the moment to promote this to roles/fail2ban_jail alongside
    # caddy_site and gatus_endpoint.
    #
    # Scope, stated so it is not mistaken for more than it is: this catches web
    # UI brute force (401 on /auth/login). It does NOT catch Subsonic API brute
    # force, because Subsonic answers a bad password with HTTP 200 and the error
    # in the body. See roles/navidrome/README.md.
    - name: Install the navidrome fail2ban filter
      ansible.builtin.copy:
        dest: /etc/fail2ban/filter.d/navidrome-caddy.conf
        owner: root
        group: root
        mode: '0644'
        content: |
          # Managed by Ansible - services/navidrome/deploy_navidrome_playbook.yml
          #
          # The log file is per-vhost, so any 401 in it is a failed Navidrome
          # login and needs no path matching.
          [Definition]
          failregex = "remote_ip":"<HOST>".*"status":401
          ignoreregex =
      notify: Restart fail2ban

    - name: Install the navidrome fail2ban jail
      ansible.builtin.copy:
        dest: /etc/fail2ban/jail.d/navidrome.conf
        owner: root
        group: root
        mode: '0644'
        content: |
          # Managed by Ansible - services/navidrome/deploy_navidrome_playbook.yml
          [navidrome]
          enabled   = true
          filter    = navidrome-caddy
          logpath   = {{ navidrome_access_log }}
          # ufw, not the Debian default iptables-multiport: UFW is what manages
          # the firewall on every host here (infra/02_firewall_and_fail2ban).
          banaction = ufw
          maxretry  = 5
          findtime  = 10m
          bantime   = 1h
      notify: Restart fail2ban

    - name: Ensure fail2ban is enabled and running
      systemd:
        name: fail2ban
        enabled: yes
        state: started

    - name: Flush handlers so the jail is loaded before we assert on it
      meta: flush_handlers

    # A jail that silently failed to load is worse than no jail: it reads as
    # protection in `ls /etc/fail2ban/jail.d` and bans nothing.
    - name: Assert the navidrome jail is actually active
      ansible.builtin.command: fail2ban-client status navidrome
      register: navidrome_jail_status
      changed_when: false
      failed_when: navidrome_jail_status.rc != 0

    - name: Display the navidrome jail status
      ansible.builtin.debug:
        var: navidrome_jail_status.stdout_lines

  handlers:
    - name: Restart fail2ban
      systemd:
        name: fail2ban
        state: restarted