---
- name: "Include OS-specific variables"
  ansible.builtin.include_vars: "{{ ansible_facts['os_family'] | lower }}.yml"

- name: "Include OS-specific installation tasks"
  ansible.builtin.include_tasks: "install-{{ ansible_facts['os_family'] | lower }}.yml"

- name: "Create grafana group"
  become: true
  ansible.builtin.group:
    name: "grafana"
    system: true

- name: "Create grafana user"
  become: true
  ansible.builtin.user:
    name: "grafana"
    group: "grafana"
    system: true
    shell: "/usr/sbin/nologin"
    create_home: false

- name: "Create grafana configuration directories"
  become: true
  ansible.builtin.file:
    path: "{{ item }}"
    state: "directory"
    owner: "grafana"
    group: "grafana"
    mode: "0755"
  loop:
    - "/etc/grafana"
    - "/etc/grafana/provisioning"
    - "/etc/grafana/provisioning/datasources"
    - "/etc/grafana/provisioning/plugins"
    - "/etc/grafana/provisioning/dashboards"

- name: "Template grafana configurations"
  become: true
  ansible.builtin.template:
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
    owner: "root"
    group: "grafana"
    mode: "0640"
  loop:
    - src: "grafana.ini.j2"
      dest: "{{ grafana_config_file }}"
    - src: "datasources/prometheus.yml.j2"
      dest: "/etc/grafana/provisioning/datasources/prometheus.yml"
    - src: "dashboards/dashboards.yml.j2"
      dest: "/etc/grafana/provisioning/dashboards/dashboards.yml"
  notify: "Restart grafana"
  no_log: true

- name: "Provision Grafana community dashboards"
  notify: "Restart grafana"
  # grafana downloaded dashboards are being rewritten after successful download
  # this is to correct the datasource mapping in the downloaded files
  # This is why these tasks are not idempotent and can't be.
  tags:
    - molecule-idempotence-notest
  block:
    - name: "Download Grafana community dashboards"
      become: true
      ansible.builtin.get_url:
        url: "https://grafana.com/api/dashboards/{{ item.id }}/revisions/{{ item.revision }}/download"
        dest: "/etc/grafana/provisioning/dashboards/{{ item.name }}.json"
        owner: "grafana"
        group: "grafana"
        mode: "0644"
        force: false
      loop: "{{ grafana_dashboards }}"

    - name: "Fix datasource references in downloaded dashboards"
      become: true
      ansible.builtin.replace:
        path: "/etc/grafana/provisioning/dashboards/{{ item.0.name }}.json"
        regexp: "{{ item.1.key | regex_escape }}"
        replace: "{{ item.1.value }}"
      loop: "{{ grafana_dashboards | subelements('datasource_mappings', skip_missing=True) }}"

- name: "Start and enable grafana"
  become: true
  ansible.builtin.systemd_service:
    name: "{{ grafana_service }}"
    state: "started"
    enabled: true