---
- name: "Install unzip package"
  ansible.builtin.apt:
    name: unzip
    state: present
    cache_valid_time: 3600


- name: "Create Loki directories"
  with_items:
    - {path: '/opt/loki', mode: '0755'}
    - {path: '/etc/loki', mode: '0644'}
  ansible.builtin.file:
    path: "{{ item.path }}"
    state: directory
    owner: root
    group: root
    mode: "{{ item.mode }}"


- name: "Template Loki config file"
  notify: "Restart the Loki daemon"
  ansible.builtin.template:
    src: "loki.yml.j2"
    dest: "/etc/loki/loki.yml"
    owner: root
    group: root
    mode: "0644"


- name: "Install requested Loki version"
  block:
    - name: "Check Loki version"
      ansible.builtin.command: /opt/loki/loki -version
      register: loki_version_check
      changed_when: false

    - name: "Assert version correctness"
      notify: "Restart the Loki daemon"
      ansible.builtin.assert:
        that: "loki_version in loki_version_check.stdout"
        success_msg: "Expected Loki version available ({{ loki_version }})"
        fail_msg: "Expected version '{{ loki_version }}'; available is '{{ loki_version_check.stdout }}'"

  rescue:
    - name: "Install Loki if it is not present ({{ loki_version }})"
      ansible.builtin.unarchive:
        src: "https://github.com/grafana/loki/releases/download/v\
             {{ loki_version }}/loki-linux-amd64.zip"
        dest: /opt/loki/
        remote_src: true

    - name: "Rename and set permissions for the Loki binary"
      ansible.builtin.copy:
        src: "/opt/loki/loki-linux-amd64"
        dest: /opt/loki/loki
        owner: root
        group: root
        mode: "0755"
        remote_src: true

    - name: "Cleanup downloaded file"
      ansible.builtin.file:
        path: /opt/loki/loki-linux-amd64
        state: absent

    - name: "Install logcli"
      ansible.builtin.unarchive:
        src: "https://github.com/grafana/loki/releases/download/v\
                {{ loki_version }}/logcli-linux-amd64.zip"
        dest: /usr/local/bin
        remote_src: true

    - name: "Rename and set permissions for the Logcli binary"
      ansible.builtin.copy:
        src: "/usr/local/bin/logcli-linux-amd64"
        dest: "/usr/local/bin/logcli"
        owner: root
        group: root
        mode: "0755"
        remote_src: true

    - name: "Cleanup downloaded file"
      ansible.builtin.file:
        path: /usr/local/bin/logcli-linux-amd64
        state: absent

- name: "Template the systemd unit file"
  notify: "Reload the Loki daemon configuration"
  ansible.builtin.template:
    src: templates/loki.service.j2
    dest: /etc/systemd/system/loki.service
    owner: root
    group: root
    mode: "0755"

- name: "Start and enable the Loki daemon"
  ansible.builtin.systemd:
    name: loki
    state: started
    enabled: true