---
- name: "Install | Create alertmanager system user"
  ansible.builtin.user:
    name: "alertmanager"
    system: true
    shell: "/sbin/nologin"
    create_home: false
    state: present

- name: "Install | Create directories {{ item }}"
  with_items:
    - "{{ alertmanager_config_dir }}"
    - "{{ alertmanager_storage_dir }}"
  ansible.builtin.file:
    path: "{{ item }}"
    state: directory
    owner: "alertmanager"
    group: "alertmanager"
    mode: "0755"

- name: "Install | Install the binaries"
  block:
    - name: "Install | Check alertmanager version"
      changed_when: false
      ansible.builtin.command:
        cmd: "alertmanager --version"
      register: alertmanager_ver

    - name: "Install | Assert version correctness"
      ansible.builtin.assert:
        that: "alertmanager_ver.stdout is regex('{{ alertmanager_version }}')"
        success_msg: "alertmanager version {{ alertmanager_version }} is installed and working"
        fail_msg: "alertmanager version {{ alertmanager_version }} is not installed or not working correctly"

  rescue:
    - name: "Install | Fetch and unpack the distribution"
      notify: "(Re)start and enable Alertmanager"
      ansible.builtin.unarchive:
        src: "https://github.com/prometheus/alertmanager/releases/download/v{{ alertmanager_version }}/\
              alertmanager-{{ alertmanager_version }}.linux-amd64.tar.gz"
        dest: "/tmp"
        creates: "/tmp/alertmanager-{{ alertmanager_version }}.linux-amd64"
        remote_src: true

    - name: "Install | Put the binaries under the PATH"
      with_items:
        - alertmanager
        - amtool
      ansible.builtin.copy:
        remote_src: true
        src: "/tmp/alertmanager-{{ alertmanager_version }}.linux-amd64/{{ item }}"
        dest: "/usr/bin/{{ item }}"
        owner: "alertmanager"
        group: "alertmanager"
        mode: "0755"

    - name: "Install | Clean up the downloads"
      ansible.builtin.file:
        path: "/tmp/alertmanager-{{ alertmanager_version }}.linux-amd64"
        state: absent

- name: "Install | Create a systemd service unit"
  notify: "(Re)start and enable Alertmanager"
  ansible.builtin.template:
    src: alertmanager.service.j2
    dest: /etc/systemd/system/alertmanager.service
    owner: "alertmanager"
    group: "alertmanager"
    mode: "0660"


# ---
# - name: "Create Alertmanager system group"
#   ansible.builtin.group:
#     name: "{{ alertmanager_user }}"
#     system: true
#     state: present

# - name: "Create Alertmanager system user"
#   ansible.builtin.user:
#     name: "{{ alertmanager_user }}"
#     group: "{{ alertmanager_group }}"
#     system: true
#     shell: "/sbin/nologin"
#     create_home: false
#     state: present

# - name: "Install Alertmanager from binary"
#   block:
#     - name: "Check Alertmanager version"
#       changed_when: false
#       ansible.builtin.command:
#         cmd: "alertmanager --version"
#       register: alertmanager_ver

#     - name: "Assert version correctness"
#       ansible.builtin.assert:
#         that: "alertmanager_ver.stdout is regex('{{ alertmanager_version }}')"
#         success_msg: "alertmanager version {{ alertmanager_version }} is installed and working"
#         fail_msg: "alertmanager version {{ alertmanager_version }} is not installed or not working correctly"

#   rescue:
#     - name: "Create Alertmanager directories '{{ item }}'"
#       ansible.builtin.file:
#         path: "{{ item }}"
#         state: directory
#         owner: "{{ alertmanager_user }}"
#         group: "{{ alertmanager_group }}"
#         mode: "0755"
#       with_items:
#         - "{{ alertmanager_config_dir }}"
#         - "{{ alertmanager_dir }}"
#         - "{{ alertmanager_storage_dir }}"

#     - name: "Download Alertmanager binary"
#       ansible.builtin.get_url:
#         url: "https://github.com/alertmanager/alertmanager/releases/download/v{{ alertmanager_version }}/\
#               alertmanager-{{ alertmanager_version }}.linux-amd64.tar.gz"
#         dest: "/tmp/alertmanager-{{ alertmanager_version }}.linux-amd64.tar.gz"
#         owner: "{{ alertmanager_user }}"
#         group: "{{ alertmanager_group }}"
#         mode: "0644"

#     - name: "Unpack Alertmanager binaries"
#       notify: "(Re)start and enable Alertmanager"
#       ansible.builtin.unarchive:
#         src: "/tmp/alertmanager-{{ alertmanager_version }}.linux-amd64.tar.gz"
#         dest: "{{ alertmanager_dir }}"
#         creates: "{{ alertmanager_dir }}/alertmanager-{{ alertmanager_version }}.linux-amd64"
#         remote_src: true

#     - name: "Cleanup downloaded file"
#       ansible.builtin.file:
#         path: "/tmp/alertmanager-{{ alertmanager_version }}.linux-amd64.tar.gz"
#         state: absent

#     - name: "Move official alertmanager and amtool binaries"
#       ansible.builtin.copy:
#         src: "{{ alertmanager_dir }}/alertmanager-{{ alertmanager_version }}.linux-amd64/{{ item }}"
#         dest: "/usr/local/bin/{{ item }}"
#         mode: "0755"
#         owner: "{{ alertmanager_user }}"
#         group: "{{ alertmanager_group }}"
#         remote_src: true
#       with_items:
#         - alertmanager
#         - amtool


# - name: "Create systemd service unit"
#   ansible.builtin.template:
#     src: alertmanager.service.j2
#     dest: /etc/systemd/system/alertmanager.service
#     owner: "{{ alertmanager_user }}"
#     group: "{{ alertmanager_group }}"
#     mode: "0660"