---
- name: Prepare base folder
  file:
    path: "{{ alertmanager_base_dir }}"
    state: directory
    owner: "{{ alertmanager_user }}"
    group: "{{ alertmanager_user }}"
    mode: 0750
  become: True
  become_user: root

- block:
    - name: Prepare folder structure
      file:
        path: "{{ item }}"
        state: directory
        mode: 0750
      loop:
        - "{{ alertmanager_config_dir }}"
        - "{{ alertmanager_templates_dir }}"
        - "{{ alertmanager_data_dir }}"

    - name: Download and extract Alertmanager tarball
      unarchive:
        src: "https://github.com/prometheus/alertmanager/releases/download/v{{ alertmanager_version }}/alertmanager-{{ alertmanager_version }}.linux-amd64.tar.gz"
        dest: "{{ alertmanager_base_dir }}"
        extra_opts:
          - --strip-components=1
        remote_src: yes
        exclude:
          - alertmanager-{{ alertmanager_version }}.linux-amd64/LICENSE
          - alertmanager-{{ alertmanager_version }}.linux-amd64/NOTICE
          - alertmanager-{{ alertmanager_version }}.linux-amd64/alertmanager.yml
      notify: __alertmanager_restart
      when: alertmanager_version is version(alertmanager_current_version, ">") or alertmanager_current_version is version('0.0.0', "=")
  become: True
  become_user: "{{ alertmanager_user }}"

- block:
    - name: Copy alertmanager config file
      template:
        src: "conf/alertmanager.yml.j2"
        dest: "{{ alertmanager_config_dir }}/alertmanager.yml"
        owner: "{{ alertmanager_user }}"
        group: "{{ alertmanager_user }}"
        mode: 0640
        validate: "{{ alertmanager_base_dir }}/amtool check-config %s"
      notify: __alertmanager_restart

    - name: Copy alertmanager web config file
      template:
        src: "conf/web.yml.j2"
        dest: "{{ alertmanager_config_dir }}/web.yml"
        owner: "{{ alertmanager_user }}"
        group: "{{ alertmanager_user }}"
        mode: 0640

    - name: Copy custom Alertmanager template files
      copy:
        src: "{{ item }}"
        dest: "{{ alertmanager_templates_dir }}"
        owner: "{{ alertmanager_user }}"
        group: "{{ alertmanager_user }}"
        mode: 0640
      with_fileglob: "{{ alertmanager_template_files }}"
      notify: __alertmanager_restart

    - name: Copy systemd unit file
      template:
        src: "etc/systemd/system/alertmanager.service.j2"
        dest: "/etc/systemd/system/alertmanager.service"
        mode: 0640
      notify: __alertmanager_restart

    - name: Ensure alertmanager service is up and running
      systemd:
        name: alertmanager
        daemon_reload: yes
        enabled: yes
        state: started

    - name: Set current version to custom fact
      template:
        src: etc/ansible/facts.d/alertmanager.fact.j2
        dest: /etc/ansible/facts.d/alertmanager.fact
        mode: 0644
        owner: root
        group: root
      when: alertmanager_version is version(alertmanager_current_version, ">") or alertmanager_current_version is version('0.0.0', "=")
  become: True
  become_user: root