---
- name: "Create the 'caddy' user"
  ansible.builtin.user:
    name: caddy
    comment: "Caddy web server"
    shell: /bin/nologin
    home: /var/lib/caddy
    state: present
    system: true

- name: "Install the requested caddy version"
  block:
    - name: "Check caddy version"
      register: caddy_version_check
      changed_when: false
      ansible.builtin.command:
        cmd: /usr/bin/caddy version

    - name: "Assert version correctness"
      ansible.builtin.assert:
        that: "caddy_version in caddy_version_check.stdout"
        success_msg: "OK, expected caddy version already available: '{{ caddy_version }}'"
        fail_msg: "Expected version '{{ caddy_version }}'; available is '{{ caddy_version_check.stdout }}'"

  rescue:
    - name: "Create a temporary directory for caddy download"
      ansible.builtin.file:
        path: /tmp/caddy
        state: directory
        owner: root
        group: root
        mode: "0755"

    - name: "Download caddy"
      notify: "Enable and restart the caddy daemon"
      vars:
        base_url: "github.com/caddyserver/caddy/releases/download"
      ansible.builtin.unarchive:
        src: "https://{{ base_url }}/v{{ caddy_version }}/caddy_{{ caddy_version }}_linux_amd64.tar.gz"
        dest: /tmp/caddy
        remote_src: true

    - name: "Rename and set permissions for the caddy binary"
      ansible.builtin.copy:
        src: "/tmp/caddy/caddy"
        dest: "/usr/bin/caddy"
        owner: root
        group: root
        mode: "0755"
        remote_src: true

    - name: "Cleanup the downloaded file"
      ansible.builtin.file:
        path: "/tmp/caddy"
        state: absent


- name: "Template the systemd unit file"
  notify: "Enable and restart the caddy daemon"
  ansible.builtin.template:
    src: caddy.service.j2
    dest: /etc/systemd/system/caddy.service
    owner: root
    group: root
    mode: "0644"

- name: "Ensure '/etc/caddy' exists"
  ansible.builtin.file:
    path: /etc/caddy
    state: directory
    owner: caddy
    group: caddy
    mode: "0755"

- name: "Template caddy config file"
  notify: "Enable and restart the caddy daemon"
  ansible.builtin.template:
    src: "{{ caddy_src_conf_path }}"
    dest: "{{ caddy_dest_conf_path }}"
    owner: root
    group: root
    mode: "0644"