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

- block:
    - name: Prepare folder structure
      file:
        path: "{{ item }}"
        state: directory
        mode: 0750
      loop:
        - "{{ prometheus_config_dir }}"
        - "{{ prometheus_rules_dir }}"
        - "{{ prometheus_data_dir }}"
        - "{{ prometheus_file_sd_dir }}"

    - name: Download and extract Prometheus tarball
      unarchive:
        src: "https://github.com/prometheus/prometheus/releases/download/v{{ prometheus_version }}/prometheus-{{ prometheus_version }}.linux-amd64.tar.gz"
        dest: "{{ prometheus_base_dir }}"
        extra_opts:
          - --strip-components=1
        remote_src: yes
        exclude:
          - prometheus-{{ prometheus_version }}.linux-amd64/LICENSE
          - prometheus-{{ prometheus_version }}.linux-amd64/NOTICE
          - prometheus-{{ prometheus_version }}.linux-amd64/prometheus.yml
      notify: __prometheus_restart
      when: prometheus_version is version(prometheus_current_version, ">") or prometheus_current_version is version('0.0.0', "=")
  become: True
  become_user: "{{ prometheus_user }}"

- block:
    - name: Copy prometheus config file
      template:
        src: "conf/prometheus.yml.j2"
        dest: "{{ prometheus_config_dir }}/prometheus.yml"
        owner: "{{ prometheus_user }}"
        group: "{{ prometheus_user }}"
        mode: 0600
        validate: "{{ prometheus_base_dir }}/promtool check config %s"
      notify: __prometheus_reload

    - name: Copy prometheus web config file
      template:
        src: "conf/web.yml.j2"
        dest: "{{ prometheus_config_dir }}/web.yml"
        owner: "{{ prometheus_user }}"
        group: "{{ prometheus_user }}"
        mode: 0640
        validate: "{{ prometheus_base_dir }}/promtool check web-config %s"

    - name: Configure prometheus static targets
      template:
        src: "conf/file_sd/sd.yml.j2"
        dest: "{{ prometheus_file_sd_dir }}/{{ item.name }}.yml"
        owner: "{{ prometheus_user }}"
        group: "{{ prometheus_user }}"
        mode: 0640
      loop: "{{ prometheus_targets }}"
      loop_control:
        label: "{{ item.name }}"

    - name: Copy prometheus custom static targets
      copy:
        src: "{{ item }}"
        dest: "{{ prometheus_file_sd_dir }}"
        owner: "{{ prometheus_user }}"
        group: "{{ prometheus_user }}"
        mode: 0640
      with_fileglob: "{{ prometheus_static_targets_files }}"

    - name: Configure prometheus alerting rules
      template:
        src: "conf/rules/alert.rules.j2"
        dest: "{{ prometheus_rules_dir }}/default.rules"
        owner: "{{ prometheus_user }}"
        group: "{{ prometheus_user }}"
        mode: 0640
        validate: "{{ prometheus_base_dir }}/promtool check rules %s"
      when: (prometheus_alert_rules + prometheus_alert_rules_extra) | length > 0
      notify: __prometheus_reload

    - name: Copy custom alerting rule files
      copy:
        src: "{{ item }}"
        dest: "{{ prometheus_rules_dir }}/"
        owner: "{{ prometheus_user }}"
        group: "{{ prometheus_user }}"
        mode: 0640
        validate: "{{ prometheus_base_dir }}/promtool check rules %s"
      with_fileglob: "{{ prometheus_alert_rules_files }}"
      notify: __prometheus_reload

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

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

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