---
- name: Install dependencies
  apt:
    name:
      - wget
      - tar
      - curl
    state: present
    update_cache: yes
  when: ansible_os_family == "Debian"

- name: Create prometheus user and group
  user:
    name: "{{ prometheus_user }}"
    group: "{{ prometheus_group }}"
    system: yes
    create_home: no

- name: Create required directories
  file:
    path: "{{ item }}"
    state: directory
    owner: "{{ prometheus_user }}"
    group: "{{ prometheus_group }}"
    mode: '0755'
  with_items:
    - "{{ prometheus_install_dir }}"
    - "{{ prometheus_data_dir }}"
    - "{{ prometheus_config_dir }}"

- name: Download Prometheus
  get_url:
    url: "https://github.com/prometheus/prometheus/releases/download/v{{ prometheus_version }}/prometheus-{{ prometheus_version }}.linux-amd64.tar.gz"
    dest: "/tmp/prometheus-{{ prometheus_version }}.tar.gz"

- name: Extract Prometheus
  unarchive:
    src: "/tmp/prometheus-{{ prometheus_version }}.tar.gz"
    dest: "{{ prometheus_install_dir }}"
    remote_src: yes

- name: Move binaries to /usr/local/bin
  command:
    cmd: mv "{{ prometheus_install_dir }}/prometheus-{{ prometheus_version }}.linux-amd64/{{ item }}" /usr/local/bin/
  with_items:
    - "prometheus"
    - "promtool"

- name: Set ownership of Prometheus files
  file:
    path: "{{ item }}"
    owner: "{{ prometheus_user }}"
    group: "{{ prometheus_group }}"
    recurse: yes
  with_items:
    - "{{ prometheus_install_dir }}"
    - "{{ prometheus_data_dir }}"
    - "{{ prometheus_config_dir }}"

- name: Copy prometheus.yml configuration
  copy:
    src: prometheus.yml
    dest: "{{ prometheus_config_dir }}/prometheus.yml"
    owner: "{{ prometheus_user }}"
    group: "{{ prometheus_group }}"
    mode: '0644'
  notify:
    - restart prometheus

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

- name: Reload systemd
  systemd:
    daemon_reload: yes

- name: Enable Prometheus service
  systemd:
    name: prometheus
    enabled: yes
    state: started