---
- name: Create prometheus user and group
  import_tasks: prometheus_user.yml

- name: Check if Prometheus is installed
  stat:
    path: /opt/prometheus/prometheus
  register: prometheus_binary

- name: Download and install Prometheus
  when: not prometheus_binary.stat.exists
  block:
    - name: Download Prometheus from GitHub
      get_url:
        dest: /tmp/prometheus-{{ prometheus_version }}.tar.gz
        url: https://github.com/prometheus/prometheus/releases/download/v{{ prometheus_version }}/prometheus-{{ prometheus_version }}.linux-amd64.tar.gz
        checksum: sha256:e12917b25b32980daee0e9cf879d9ec197e2893924bd1574604eb0f550034d46

    - name: Create Prometheus directory
      file:
        path: /opt/prometheus
        state: directory
        owner: prometheus
        group: prometheus
        mode: 0755

    - name: Extract Prometheus
      unarchive:
        remote_src: true
        src: /tmp/prometheus-{{ prometheus_version }}.tar.gz
        dest: /opt/prometheus
        owner: prometheus
        group: prometheus
        extra_opts:
          - --strip-components=1

- name: Create Prometheus service file
  copy:
    src: prometheus.service
    dest: /etc/systemd/system/prometheus.service
    owner: root
    group: root
    mode: 0644

- name: Add Prometheus config file
  template:
    src: prometheus.yml.jinja2
    dest: /opt/prometheus/prometheus.yml
    owner: prometheus
    group: prometheus
    mode: 0644
  notify:
    - Restart prometheus

- name: Start and enable prometheus service
  service:
    name: prometheus
    state: started
    enabled: true